Class Index

Kotlin |Java

These are the API classes. See all API packages.

A

AbsSavedState	A `Parcelable` implementation that should be used by inheritance hierarchies to ensure the state of all classes along the chain is saved.
AbstractDetailsDescriptionPresenter	An abstract `Presenter` for rendering a detailed description of an item.
AbstractDetailsDescriptionPresenter.ViewHolder	The ViewHolder for the `AbstractDetailsDescriptionPresenter`.
AbstractMediaItemPresenter	Abstract `Presenter` class for rendering media items in a playlist format.
AbstractMediaItemPresenter.ViewHolder	The ViewHolder for the `AbstractMediaItemPresenter`.
AbstractMediaListHeaderPresenter	Abstract presenter class for rendering the header for a list of media items in a playlist.
AbstractMediaListHeaderPresenter.ViewHolder	The ViewHolder for the `AbstractMediaListHeaderPresenter`.
AbstractSavedStateViewModelFactory	Skeleton of androidx.lifecycle.ViewModelProvider.KeyedFactory that creates `SavedStateHandle` for every requested `ViewModel`.
AccelerateDecelerateInterpolator	An interpolator where the rate of change starts and ends slowly but accelerates through the middle.
AccelerateInterpolator	An interpolator where the rate of change starts out slowly and and then accelerates.
Accelerometer	Information about car specific accelerometers available from the car hardware.
AccessControlProfile	A class used to specify access controls.
AccessControlProfile.Builder	A builder for `AccessControlProfile`.
AccessControlProfileId	A class used to wrap an access control profile identifiers.
AccessibilityClickableSpanCompat	`ClickableSpan` cannot be parceled, but accessibility services need to be able to cause their callback handlers to be called.
AccessibilityDelegateCompat	Helper for accessing `View.AccessibilityDelegate`.
AccessibilityEventCompat	Helper for accessing features in `AccessibilityEvent`.
AccessibilityManagerCompat	Helper for accessing features in `AccessibilityManager`.
AccessibilityManagerCompat.AccessibilityStateChangeListener	This interface is deprecated. Use `AccessibilityManager.AccessibilityStateChangeListener` directly instead of this listener.
AccessibilityManagerCompat.AccessibilityStateChangeListenerCompat	This class is deprecated. Use `AccessibilityManager.AccessibilityStateChangeListener` directly instead of this listener.
AccessibilityManagerCompat.TouchExplorationStateChangeListener	Listener for the system touch exploration state.
AccessibilityNodeInfoCompat	Helper for accessing `AccessibilityNodeInfo` in a backwards compatible fashion.
AccessibilityNodeInfoCompat.AccessibilityActionCompat	A class defining an action that can be performed on an `AccessibilityNodeInfo`.
AccessibilityNodeInfoCompat.CollectionInfoCompat	Class with information if a node is a collection.
AccessibilityNodeInfoCompat.CollectionItemInfoCompat	Class with information if a node is a collection item.
AccessibilityNodeInfoCompat.RangeInfoCompat	Class with information if a node is a range.
AccessibilityNodeInfoCompat.TouchDelegateInfoCompat	Class with information of touch delegated views and regions.
AccessibilityNodeProviderCompat	Helper for accessing `AccessibilityNodeProvider`.
AccessibilityRecordCompat	Helper for accessing `AccessibilityRecord`.
AccessibilityServiceInfoCompat	Helper for accessing features in `AccessibilityServiceInfo`.
AccessibilityViewCommand	Functional interface used to create a custom accessibility action.
AccessibilityViewCommand.CommandArguments	Object containing arguments passed into an `AccessibilityViewCommand`
AccessibilityViewCommand.MoveAtGranularityArguments	Arguments for `#ACTION_NEXT_AT_MOVEMENT_GRANULARITY` and `#ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY`
AccessibilityViewCommand.MoveHtmlArguments	Arguments for `AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT` and `#ACTION_PREVIOUS_HTML_ELEMENT`
AccessibilityViewCommand.MoveWindowArguments	Arguments for `#ACTION_MOVE_WINDOW`
AccessibilityViewCommand.ScrollToPositionArguments	Arguments for `#ACTION_SCROLL_TO_POSITION`
AccessibilityViewCommand.SetProgressArguments	Arguments for `#ACTION_SET_PROGRESS`
AccessibilityViewCommand.SetSelectionArguments	Arguments for `#ACTION_SET_SELECTION`
AccessibilityViewCommand.SetTextArguments	Arguments for `AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_SET_TEXT`
AccessibilityWindowInfoCompat	Helper for accessing `AccessibilityWindowInfo`.
Action	Represents an action with an optional icon and text.
Action	An action contains one or two lines of text, an optional image and an optional id.
Action.Builder	A builder of `Action`.
ActionBar	A primary toolbar within the activity that may display the activity title, application-level navigation affordances, and other interactive items.
ActionBar.LayoutParams	Per-child layout information associated with action bar custom views.
ActionBar.OnMenuVisibilityListener	Listener for receiving events when action bar menus are shown or hidden.
ActionBar.OnNavigationListener	This interface is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
ActionBar.Tab	This class is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
ActionBar.TabListener	This interface is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
ActionBarDrawerToggle	This class provides a handy way to tie together the functionality of `DrawerLayout` and the framework `ActionBar` to implement the recommended design for navigation drawers.
ActionBarDrawerToggle.Delegate
ActionBarDrawerToggle.DelegateProvider	Allows an implementing Activity to return an `ActionBarDrawerToggle.Delegate` to use with ActionBarDrawerToggle.
ActionBuilders	Builders for actions that can be performed when a user interacts with layout elements.
ActionBuilders.Action	Interface defining an action that can be used by a layout element.
ActionBuilders.Action.Builder	Builder to create `ActionBuilders.Action` objects.
ActionBuilders.AndroidActivity	A launch action to send an intent to an Android activity.
ActionBuilders.AndroidActivity.Builder	Builder for `ActionBuilders.AndroidActivity`
ActionBuilders.AndroidBooleanExtra	A boolean value that can be added to an Android intent's extras.
ActionBuilders.AndroidBooleanExtra.Builder	Builder for `ActionBuilders.AndroidBooleanExtra`.
ActionBuilders.AndroidDoubleExtra	A double value that can be added to an Android intent's extras.
ActionBuilders.AndroidDoubleExtra.Builder	Builder for `ActionBuilders.AndroidDoubleExtra`.
ActionBuilders.AndroidExtra	Interface defining an item that can be included in the extras of an intent that will be sent to an Android activity.
ActionBuilders.AndroidExtra.Builder	Builder to create `ActionBuilders.AndroidExtra` objects.
ActionBuilders.AndroidIntExtra	An integer value that can be added to an Android intent's extras.
ActionBuilders.AndroidIntExtra.Builder	Builder for `ActionBuilders.AndroidIntExtra`.
ActionBuilders.AndroidLongExtra	A long value that can be added to an Android intent's extras.
ActionBuilders.AndroidLongExtra.Builder	Builder for `ActionBuilders.AndroidLongExtra`.
ActionBuilders.AndroidStringExtra	A string value that can be added to an Android intent's extras.
ActionBuilders.AndroidStringExtra.Builder	Builder for `ActionBuilders.AndroidStringExtra`.
ActionBuilders.LaunchAction	An action used to launch another activity on the system.
ActionBuilders.LaunchAction.Builder	Builder for `ActionBuilders.LaunchAction`.
ActionBuilders.LoadAction	An action used to load (or reload) the tile contents.
ActionBuilders.LoadAction.Builder	Builder for `ActionBuilders.LoadAction`.
ActionMenuView	ActionMenuView is a presentation of a series of menu options as a View.
ActionMenuView.LayoutParams
ActionMenuView.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
ActionMode	Represents a contextual mode of the user interface.
ActionMode.Callback	Callback interface for action modes.
ActionProvider	This class is a mediator for accomplishing a given task, for example sharing a file.
ActionProvider.VisibilityListener	Listens to changes in visibility as reported by `ActionProvider.refreshVisibility()`.
ActionStrip	Represents a list of `Action`s that are used for a template.
ActionStrip.Builder	A builder of `ActionStrip`.
ActivityCompat	Helper for accessing features in `Activity`.
ActivityCompat.OnRequestPermissionsResultCallback	This interface is the contract for receiving the results for permission requests.
ActivityCompat.PermissionCompatDelegate	Customizable delegate that allows delegating permission compatibility methods to a custom implementation.
ActivityInfoCompat	This class is deprecated. Use `ActivityInfo` directly.
ActivityManagerCompat	Helper for accessing features in `ActivityManager` in a backwards compatible fashion.
ActivityOptionsCompat	Helper for accessing features in `ActivityOptions` in a backwards compatible fashion.
ActivityResult	A container for an activity result as obtained form `Activity.onActivityResult(int, int, Intent)`
ActivityResultCallback<O>	A type-safe callback to be called when an `activity result` is available.
ActivityResultCaller	A class that can call `Activity.startActivityForResult(Intent, int)`-style APIs without having to manage request codes, and converting request/response to an `Intent`
ActivityResultContract<I, O>	A contract specifying that an activity can be called with an input of type I and produce an output of type O Makes calling an activity for result type-safe.
ActivityResultContract.SynchronousResult<T>	The wrapper for a result provided in `ActivityResultContract.getSynchronousResult(Context, I)`
ActivityResultContracts	A collection of some standard activity call contracts, as provided by android.
ActivityResultContracts.CaptureVideo	An `ActivityResultContract` to `take a video` saving it into the provided content-`Uri`.
ActivityResultContracts.CreateDocument	An `ActivityResultContract` to prompt the user to select a path for creating a new document, returning the `content:` `Uri` of the item that was created.
ActivityResultContracts.GetContent	An `ActivityResultContract` to prompt the user to pick a piece of content, receiving a `content://` `Uri` for that content that allows you to use `ContentResolver.openInputStream(Uri)` to access the raw data.
ActivityResultContracts.GetMultipleContents	An `ActivityResultContract` to prompt the user to pick one or more a pieces of content, receiving a `content://` `Uri` for each piece of content that allows you to use `ContentResolver.openInputStream(Uri)` to access the raw data.
ActivityResultContracts.OpenDocument	An `ActivityResultContract` to prompt the user to open a document, receiving its contents as a `file:/http:/content:` `Uri`.
ActivityResultContracts.OpenDocumentTree	An `ActivityResultContract` to prompt the user to select a directory, returning the user selection as a `Uri`.
ActivityResultContracts.OpenMultipleDocuments	An `ActivityResultContract` to prompt the user to open (possibly multiple) documents, receiving their contents as `file:/http:/content:` `Uri`s.
ActivityResultContracts.PickContact	An `ActivityResultContract` to request the user to pick a contact from the contacts app.
ActivityResultContracts.RequestMultiplePermissions	An `ActivityResultContract` to `request permissions`
ActivityResultContracts.RequestPermission	An `ActivityResultContract` to `request a permission`
ActivityResultContracts.StartActivityForResult	An `ActivityResultContract` that doesn't do any type conversion, taking raw `Intent` as an input and `ActivityResult` as an output.
ActivityResultContracts.StartIntentSenderForResult	An `ActivityResultContract` that calls `Activity.startIntentSender(IntentSender, Intent, int, int, int)`.
ActivityResultContracts.TakePicture	An `ActivityResultContract` to `take a picture` saving it into the provided content-`Uri`.
ActivityResultContracts.TakePicturePreview	An `ActivityResultContract` to `take small a picture` preview, returning it as a `Bitmap`.
ActivityResultContracts.TakeVideo	This class is deprecated. The thumbnail bitmap is rarely returned and is not a good signal to determine whether the video was actually successfully captured. Use `ActivityResultContracts.CaptureVideo` to instead.
ActivityResultLauncher<I>	A launcher for a previously-`prepared call` to start the process of executing an `ActivityResultContract`.
ActivityResultRegistry	A registry that stores `activity result callbacks` for `registered calls`.
ActivityResultRegistryOwner	A class that has an `ActivityResultRegistry` that allows you to register a `ActivityResultCallback` for handling an `ActivityResultContract`.
AdapterListUpdateCallback	ListUpdateCallback that dispatches update events to the given adapter.
AdvertisingIdClient	Client for retrieving Advertising ID related info from an AndroidX ID Provider installed on the device.
AdvertisingIdInfo	Advertising ID Information.
AdvertisingIdNotAvailableException	Indicates an AndroidX Advertising ID is not available.
AdvertisingIdProvider	The class for the AndroidX Advertising ID Provider that should provide the resettable ID and LAT preference should implement this interface.
AdvertisingIdProviderInfo	A `AdvertisingIdProviderInfo` represents the information about an Advertising ID Provider installed on the device.
AdvertisingIdProviderManager	The AdvertisingIdProviderManager will be used by an Advertising ID Provider to register the provider implementation or retrieve all the Advertising ID Providers on the device.
AlarmManagerCompat	Compatibility library for `AlarmManager` with fallbacks for older platforms.
AlertDialog	A subclass of Dialog that can display one, two or three buttons.
AlertDialog.Builder
AlreadyPersonalizedException	Thrown if trying to create a credential which already exists.
AmbientMode	This class is deprecated. please use `AmbientModeSupport` instead.
AmbientMode.AmbientCallback	Callback to receive ambient mode state changes.
AmbientMode.AmbientCallbackProvider	Interface for any `Activity` that wishes to implement Ambient Mode.
AmbientMode.AmbientController	A class for interacting with the ambient mode on a wearable device.
AmbientModeSupport	Use this as a headless Fragment to add ambient support to an Activity on Wearable devices.
AmbientModeSupport.AmbientCallback	Callback to receive ambient mode state changes.
AmbientModeSupport.AmbientCallbackProvider	Interface for any `Activity` that wishes to implement Ambient Mode.
AmbientModeSupport.AmbientController	A class for interacting with the ambient mode on a wearable device.
AndroidViewModel	Application context aware `ViewModel`.
Animatable2Compat	Interface that drawables supporting animations and callbacks should extend in support lib.
Animatable2Compat.AnimationCallback	Abstract class for animation callback.
AnimatedStateListDrawableCompat	A `Drawable` providing animated transitions between states.
AnimatedVectorDrawableCompat	For API 24 and above, this class is delegating to the framework's `AnimatedVectorDrawable`.
Animator	This is the superclass for classes which provide basic support for animations which can be started, ended, and have `AnimatorListeners` added to them.
Animator.AnimatorListener	An animation listener receives notifications from an animation.
Animator.AnimatorPauseListener	A pause listener receives notifications from an animation when the animation is `paused` or `resumed`.
Animator.AnimatorUpdateListener	Implementors of this interface can add themselves as update listeners to an `ValueAnimator` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `ValueAnimator`.
AnimatorInflater	This class is used to instantiate animator XML files into Animator objects.
AnimatorListenerAdapter	This adapter class provides empty implementations of the methods from `Animator.AnimatorListener`.
AnimatorRes	Denotes that an integer parameter, field or method return value is expected to be an animator resource reference (e.g.
AnimatorSet	This class plays a set of `Animator` objects in the specified order.
AnimatorSet.Builder	The `Builder` object is a utility class to facilitate adding animations to a `AnimatorSet` along with the relationships between the various animations.
AnimatorTestRule	JUnit `TestRule` that can be used to run `Animator`s without actually waiting for the duration of the animation.
AnimRes	Denotes that an integer parameter, field or method return value is expected to be an anim resource reference (e.g.
AnticipateInterpolator	An interpolator where the change starts backward then flings forward.
AnticipateOvershootInterpolator	An interpolator where the change starts backward then flings forward and overshoots the target value and finally goes back to the final value.
AnyRes	Denotes that an integer parameter, field or method return value is expected to be a resource reference of any type.
AnyThread	Denotes that the annotated method can be called from any thread (e.g.
AppAuthenticator	Provides methods to verify the signing identity of other apps on the device.
AppAuthenticatorXmlException	This `Exception` is thrown when the XML configuration file is not in the proper format to instantiate a new `AppAuthenticator`.
AppCompatActivity	Base class for activities that wish to use some of the newer platform features on older Android devices.
AppCompatAutoCompleteTextView	A `AutoCompleteTextView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatButton	A `Button` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatCallback	Implemented this in order for AppCompat to be able to callback in certain situations.
AppCompatCheckBox	A `CheckBox` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `CompoundButtonCompat`.
AppCompatCheckedTextView	A `CheckedTextView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatDelegate	This class represents a delegate which you can use to extend AppCompat's support to any `Activity`.
AppCompatDialog	Base class for AppCompat themed `Dialog`s.
AppCompatDialogFragment	A special version of `DialogFragment` which uses an `AppCompatDialog` in place of a platform-styled dialog.
AppCompatEditText	A `EditText` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatImageButton	A `ImageButton` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatImageView	A `ImageView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatMultiAutoCompleteTextView	A `MultiAutoCompleteTextView` which supports compatible features on older version of the platform, including: Supports `R.attr.textAllCaps` style attribute which works back to `Gingerbread`.
AppCompatRadioButton	A `RadioButton` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `CompoundButtonCompat`.
AppCompatRatingBar	A `RatingBar` which supports compatible features on older versions of the platform.
AppCompatResources	Class for accessing an application's resources through AppCompat, and thus any backward compatible functionality.
AppCompatSeekBar	A `SeekBar` which supports compatible features on older versions of the platform.
AppCompatSpinner	A `Spinner` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatTextView	A `TextView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatToggleButton	A `ToggleButton` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatViewInflater	This class is used by AppCompat to automatically "substitute" all usages of core Android widgets inflated from layout files by the AppCompat extensions of those widgets.
AppComponentFactory	Version of `AppComponentFactory` that works with androidx libraries.
AppInfo	Container class for information about the app the host is connected to.
AppInitializer	An `AppInitializer` can be used to initialize all discovered [ComponentInitializer]s.
AppLaunchChecker	This class provides APIs for determining how an app has been launched.
AppManager	Manages the communication between the app and the host.
AppOpsManagerCompat	Helper for accessing features in `AppOpsManager`.
AppSearchBatchResult<KeyType, ValueType>	Provides results for AppSearch batch operations which encompass multiple documents.
AppSearchBatchResult.Builder<KeyType, ValueType>	Builder for `AppSearchBatchResult` objects.
AppSearchException	An exception thrown by `AppSearchSession` or a subcomponent.
AppSearchResult<ValueType>	Information about the success or failure of an AppSearch call.
AppSearchSchema	The AppSearch Schema for a particular type of document.
AppSearchSchema.BooleanPropertyConfig	Configuration for a property containing a boolean.
AppSearchSchema.BooleanPropertyConfig.Builder	Builder for `AppSearchSchema.BooleanPropertyConfig`.
AppSearchSchema.Builder	Builder for `objects`.
AppSearchSchema.BytesPropertyConfig	Configuration for a property containing a byte array.
AppSearchSchema.BytesPropertyConfig.Builder	Builder for `AppSearchSchema.BytesPropertyConfig`.
AppSearchSchema.DocumentPropertyConfig	Configuration for a property containing another Document.
AppSearchSchema.DocumentPropertyConfig.Builder	Builder for `AppSearchSchema.DocumentPropertyConfig`.
AppSearchSchema.DoublePropertyConfig	Configuration for a property containing a double-precision decimal number.
AppSearchSchema.DoublePropertyConfig.Builder	Builder for `AppSearchSchema.DoublePropertyConfig`.
AppSearchSchema.LongPropertyConfig	Configuration for a property containing a 64-bit integer.
AppSearchSchema.LongPropertyConfig.Builder	Builder for `AppSearchSchema.LongPropertyConfig`.
AppSearchSchema.PropertyConfig	Common configuration for a single property (field) in a Document.
AppSearchSchema.StringPropertyConfig	Configuration for a property of type String in a Document.
AppSearchSchema.StringPropertyConfig.Builder	Builder for `AppSearchSchema.StringPropertyConfig`.
AppSearchSession	Provides a connection to a single AppSearch database.
AppWidgetProviderWithCallbacks<T extends CallbackReceiver>	Version of `AppWidgetProvider` that implements a `CallbackReceiver`.
ArcLayout	Container which will lay its elements out on an arc.
ArcLayout.LayoutParams	Layout parameters for a widget added to an arc.
ArcLayout.Widget	Interface for a widget which knows it is being rendered inside an arc, and will draw itself accordingly.
ArcMotion	A PathMotion that generates a curved path along an arc on an imaginary circle containing the two points.
ArgbEvaluator	This evaluator can be used to perform type interpolation between integer values that represent ARGB colors.
ArrayCreatingInputMerger	An `InputMerger` that attempts to merge the inputs, creating arrays when necessary.
ArrayMap<K, V>	ArrayMap is a generic key->value mapping data structure that is designed to be more memory efficient than a traditional `HashMap`, this implementation is a version of the platform's `android.util.ArrayMap` that can be used on older versions of the platform.
ArrayObjectAdapter	An `ObjectAdapter` implemented with an `ArrayList`.
ArrayRes	Denotes that an integer parameter, field or method return value is expected to be an array resource reference (e.g.
ArraySet<E>	ArraySet is a generic set data structure that is designed to be more memory efficient than a traditional `HashSet`.
AspectRatio	The aspect ratio of the use case.
AsyncDifferConfig<T>	Configuration object for `ListAdapter`, `AsyncListDiffer`, and similar background-thread list diffing adapter logic.
AsyncDifferConfig.Builder<T>	Builder class for `AsyncDifferConfig`.
AsyncLayoutInflater	Helper class for inflating layouts asynchronously.
AsyncLayoutInflater.OnInflateFinishedListener
AsyncListDiffer<T>	Helper for computing the difference between two lists via `DiffUtil` on a background thread.
AsyncListDiffer.ListListener<T>	Listener for when the current List is updated.
AsyncListUtil<T>	A utility class that supports asynchronous content loading.
AsyncListUtil.DataCallback<T>	The callback that provides data access for `AsyncListUtil`.
AsyncListUtil.ViewCallback	The callback that links `AsyncListUtil` with the list view.
AsyncTaskLoader<D>	Static library support version of the framework's `AsyncTaskLoader`.
AtomicFile	Static library support version of the framework's `AtomicFile`, a helper class for performing atomic operations on a file by writing to a new file and renaming it into the place of the original file after the write has successfully completed.
Attribute	Map a getter to its Android resources attribute.
Attribute.IntMap	One entry in a mapping of int values to enum or flag names.
AttrRes	Denotes that an integer parameter, field or method return value is expected to be an attribute reference (e.g.
AudioAttributesCompat	A class to encapsulate a collection of attributes describing information about an audio stream.
AudioAttributesCompat.Builder	Builder class for `AudioAttributesCompat` objects.
AudioFocusRequestCompat	Compatibility version of an `AudioFocusRequest`.
AudioFocusRequestCompat.Builder	Builder class for `AudioFocusRequestCompat` objects.
AudioManagerCompat	Compatibility library for `AudioManager` with fallbacks for older platforms.
AuthPrompt	A handle to the prompt that is shown while the user is authenticating.
AuthPromptCallback	A collection of methods that may be invoked by an auth prompt during authentication.
AuthPromptHost	A wrapper class for the component that will be used to host an auth prompt.
AutoImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
AutoMigration	Declares an automatic migration on a Database.
AutoMigrationSpec	Interface for defining an automatic migration specification for Room databases.
AutoPreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
AutoScrollHelper	AutoScrollHelper is a utility class for adding automatic edge-triggered scrolling to Views.
AutoTransition	Utility class for creating a default transition that automatically fades, moves, and resizes views during a scene change.

B

BackgroundManager	Supports background image continuity between multiple Activities.
BackoffPolicy	An enumeration of backoff policies when retrying work.
BandPredicate	Provides a means of controlling when and where band selection can be initiated.
BandPredicate.EmptyArea	A BandPredicate that allows initiation of band selection only in areas of RecyclerView that map to `RecyclerView.NO_POSITION`.
BandPredicate.NonDraggableArea	A BandPredicate that allows initiation of band selection in any area that is not draggable as determined by consulting `ItemDetailsLookup.ItemDetails.inDragRegion(MotionEvent)`.
BaseCardView	A card style layout that responds to certain state changes.
BaseCardView.LayoutParams	Per-child layout information associated with BaseCardView.
BaseFragment	This class is deprecated. use `BaseSupportFragment`
BaseGridView	An abstract base class for vertically and horizontally scrolling lists.
BaseGridView.OnKeyInterceptListener	Listener for intercepting key dispatch events.
BaseGridView.OnLayoutCompletedListener	Interface for receiving notification when BaseGridView has completed a full layout calculation.
BaseGridView.OnMotionInterceptListener	Listener for intercepting generic motion dispatch events.
BaseGridView.OnTouchInterceptListener	Listener for intercepting touch dispatch events.
BaseGridView.OnUnhandledKeyListener
BaseGridView.SmoothScrollByBehavior	Defines behavior of duration and interpolator for smoothScrollBy().
BaseLeanbackPreferenceFragment	This class is deprecated. Use `BaseLeanbackPreferenceFragmentCompat`
BaseLeanbackPreferenceFragmentCompat	This fragment provides a preference fragment with leanback-style behavior, suitable for embedding into broader UI elements.
BaseOnItemViewClickedListener<T>	Interface for receiving notification when an item view holder is clicked.
BaseOnItemViewSelectedListener<T>	Interface for receiving notification when a row or item becomes selected.
BaseSupportFragment	Base class for leanback Fragments.
BatchingListUpdateCallback	Wraps a `ListUpdateCallback` callback and batches operations that can be merged.
BeautyImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
BeautyPreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
BidiFormatter	Utility class for formatting text for display in a potentially opposite-directionality context without garbling.
BidiFormatter.Builder	A class for building a BidiFormatter with non-default options.
BidirectionalTypeConverter<T, V>	Abstract base class used convert type T to another type V and back again.
BinderThread	Denotes that the annotated method should only be called on the binder thread.
BiometricManager	A class that provides system information related to biometrics (e.g.
BiometricManager.Authenticators	Types of authenticators, defined at a level of granularity supported by `BiometricManager` and `BiometricPrompt`.
BiometricPrompt	A class that manages a system-provided biometric prompt.
BiometricPrompt.AuthenticationCallback	A collection of methods that may be invoked by `BiometricPrompt` during authentication.
BiometricPrompt.AuthenticationResult	A container for data passed to `BiometricPrompt.AuthenticationCallback.onAuthenticationSucceeded(AuthenticationResult)` when the user has successfully authenticated.
BiometricPrompt.CryptoObject	A wrapper class for the crypto objects supported by `BiometricPrompt`.
BiometricPrompt.PromptInfo	A set of configurable options for how the `BiometricPrompt` should appear and behave.
BiometricPrompt.PromptInfo.Builder	A builder used to set individual options for the `BiometricPrompt.PromptInfo` class.
BitmapCompat	Helper for accessing features in `Bitmap`.
BlendModeColorFilterCompat	Helper for accessing ColorFilter APIs on various API levels of the platform
BlendModeCompat	Compat version of `BlendMode`, usages of `BlendModeCompat` will map to `PorterDuff.Mode` wherever possible
BokehImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
BokehPreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
BoolRes	Denotes that an integer parameter, field or method return value is expected to be a boolean resource reference.
BounceInterpolator	An interpolator where the change bounces at the end.
BoundaryInterfaceReflectionUtil	A set of utility methods used for calling across the support library boundary.
BoundsRule	This class contains the rules for updating the bounds of a `CompositeDrawable.ChildDrawable`.
BoundsRule.ValueRule	This class represents individual rules for updating the bounds.
BoxInsetLayout	BoxInsetLayout is a screen shape-aware ViewGroup that can box its children in the center square of a round screen by using the `layout_boxedEdges` attribute.
BoxInsetLayout.LayoutParams	Per-child layout information for layouts that support margins, gravity and boxedEdges.
BrandedFragment	This class is deprecated. use `BrandedSupportFragment`
BrandedSupportFragment	Fragment class for managing search and branding using a view that implements `TitleViewAdapter.Provider`.
BroadcastReceiverWithCallbacks<T extends CallbackReceiver>	Extend this broadcast receiver to be able to receive callbacks as well as normal broadcasts.
BrowseFragment	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.BrowseTransitionListener	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.FragmentFactory<T extends Fragment>	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.FragmentHost	This interface is deprecated. use `BrowseSupportFragment`
BrowseFragment.ListRowFragmentFactory	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.MainFragmentAdapter<T extends Fragment>	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.MainFragmentAdapterProvider	This interface is deprecated. use `BrowseSupportFragment`
BrowseFragment.MainFragmentAdapterRegistry	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.MainFragmentRowsAdapter<T extends Fragment>	This class is deprecated. use `BrowseSupportFragment`
BrowseFragment.MainFragmentRowsAdapterProvider	This interface is deprecated. use `BrowseSupportFragment`
BrowseFrameLayout	A ViewGroup for managing focus behavior between overlapping views.
BrowseFrameLayout.OnChildFocusListener	Interface for managing child focus in a BrowseFrameLayout.
BrowseFrameLayout.OnFocusSearchListener	Interface for selecting a focused view in a BrowseFrameLayout when the system focus finder couldn't find a view to focus.
BrowserActionItem	This class is deprecated. Browser Actions are deprecated as of release 1.2.0.
BrowserActionsIntent	This class is deprecated. Browser Actions are deprecated as of release 1.2.0.
BrowserActionsIntent.Builder	Builder class for opening a Browser Actions context menu.
BrowseSupportFragment	A fragment for creating Leanback browse screens.
BrowseSupportFragment.BrowseTransitionListener	Listener for transitions between browse headers and rows.
BrowseSupportFragment.FragmentFactory<T extends Fragment>	Factory class responsible for creating fragment given the current item.
BrowseSupportFragment.FragmentHost	Possible set of actions that `BrowseSupportFragment` exposes to clients.
BrowseSupportFragment.ListRowFragmentFactory	FragmentFactory implementation for `ListRow`.
BrowseSupportFragment.MainFragmentAdapter<T extends Fragment>	Interface that defines the interaction between `BrowseSupportFragment` and its main content fragment.
BrowseSupportFragment.MainFragmentAdapterProvider	Interface to be implemented by all fragments for providing an instance of `BrowseSupportFragment.MainFragmentAdapter`.
BrowseSupportFragment.MainFragmentAdapterRegistry	Registry class maintaining the mapping of `Row` subclasses to `BrowseSupportFragment.FragmentFactory`.
BrowseSupportFragment.MainFragmentRowsAdapter<T extends Fragment>	This is used to pass information to `RowsSupportFragment` or its subclasses.
BrowseSupportFragment.MainFragmentRowsAdapterProvider	Interface to be implemented by `RowsSupportFragment` and its subclasses for providing an instance of `BrowseSupportFragment.MainFragmentRowsAdapter`.
BuildCompat	This class contains additional platform version checking methods for targeting pre-release versions of Android.
BuildCompat.PrereleaseSdkCheck	Experimental feature set for pre-release SDK checks.
Bundleable	A class that serializes and stores an object for sending over IPC.
BundleCompat	Helper for accessing features in `Bundle`.
BundledEmojiCompatConfig	`EmojiCompat.Config` implementation that loads the metadata using AssetManager and bundled resources.
BundledEmojiCompatConfig	`EmojiCompat.Config` implementation that loads the metadata using AssetManager and bundled resources.
BundlerException	An `Exception` that notates a failure in serializing or deserialized to or from a bundle.

C

CallbackHandlerRegistry	The holder for callbacks that are tagged with `RemoteCallable`.
CallbackHandlerRegistry.CallbackHandler<T extends CallbackReceiver>	The interface used to trigger a callback when the pending intent is fired.
CallbackMediaItem	Structure for media item descriptor for `DataSourceCallback`.
CallbackMediaItem.Builder	This Builder class simplifies the creation of a `CallbackMediaItem` object.
CallbackReceiver<T>	An objects that can receive remote callbacks.
CallbackToFutureAdapter	A utility useful for adapting interfaces that take callbacks into interfaces that return `ListenableFuture`.
CallbackToFutureAdapter.Completer<T>	Used to complete the future returned by `CallbackToFutureAdapter.getFuture(CallbackToFutureAdapter.Resolver)`
CallbackToFutureAdapter.Resolver<T>	This interface should be implemented by the object passed into `CallbackToFutureAdapter.getFuture(Resolver)`.
CallSuper	Denotes that any overriding methods should invoke this method as well.
Camera	The camera interface is used to control the flow of data to use cases, control the camera via the `CameraControl`, and publish the state of the camera via `CameraInfo`.
Camera2CameraControl	An class that provides ability to interoperate with the `android.hardware.camera2` APIs.
Camera2CameraInfo	An interface for retrieving Camera2-related camera information.
Camera2Config	Convenience class for generating a pre-populated Camera2 `CameraXConfig`.
Camera2Interop	Utilities related to interoperability with the `android.hardware.camera2` APIs.
Camera2Interop.Extender<T>	Extends a `ExtendableBuilder` to add Camera2 options.
CameraControl	The `CameraControl` provides various asynchronous operations like zoom, focus and metering which affects output of all `UseCase`s currently bound to that camera.
CameraControl.OperationCanceledException	An exception representing a failure that the operation is canceled which might be caused by a new value is set or camera is closed.
CameraController	The abstract base camera controller class.
CameraController.OutputSize	Represents the output size of a `UseCase`.
CameraFilter	An interface for filtering cameras.
CameraInfo	An interface for retrieving camera information.
CameraInfoUnavailableException	An exception thrown when unable to retrieve information about a camera.
CameraProvider	A `CameraProvider` provides basic access to a set of cameras such as querying for camera existence or information.
CameraSelector	A set of requirements and priorities used to select a camera or return a filtered set of cameras.
CameraSelector.Builder	Builder for a `CameraSelector`.
CameraState	Represents the different states the camera can be in.
CameraState.ErrorType	Types of errors the camera can encounter.
CameraState.StateError	Error that the camera has encountered.
CameraState.Type	States the camera can be in.
CameraUnavailableException	`CameraUnavailableException` is thrown when a camera device could not be queried or opened or if the connection to an opened camera device is no longer valid.
CameraXConfig	A configuration for adding implementation and user-specific behavior to CameraX.
CameraXConfig.Builder	A builder for generating `CameraXConfig` objects.
CameraXConfig.Provider	An interface which can be implemented to provide the configuration for CameraX.
CancellationSignal	Static library support version of the framework's `CancellationSignal`.
CancellationSignal.OnCancelListener	Listens for cancellation.
CanvasComplicationFactory	Factory for creating a CanvasComplication.
CaptureRequestOptions	A bundle of Camera2 capture request options.
CaptureRequestOptions.Builder	Builder for creating `CaptureRequestOptions` instance.
CarAppActivity	The class representing a car app activity.
CarAppApiLevels	API levels supported by this library.
CarAppExtender	Helper class to add car app extensions to notifications.
CarAppExtender.Builder	A builder of `CarAppExtender`.
CarAppPermission	Defines all constants for permissions that a car app can use.
CarAppService	The base class for implementing a car app that runs in the car.
CarColor	Represents a color to be used in a car app.
CarConnection	A class that allows retrieval of information about connection to a car head unit.
CarContext	The CarContext class is a `ContextWrapper` subclass accessible to your `CarAppService` and `Screen` instances, which provides access to car services such as the `ScreenManager` for managing the screen stack, the `AppManager` for general app-related functionality such as accessing a surface for drawing your navigation app's map, and the `NavigationManager` used by turn-by-turn navigation apps to communicate navigation metadata and other navigation-related events with the host.
CardView	A FrameLayout with a rounded corner background and shadow.
CarHardwareLocation	Information about car specific car location available from the car hardware.
CarHardwareManager	Manages access to car hardware specific properties and sensors.
CarIcon	Represents an icon to be used in a car app.
CarIcon.Builder	A builder of `CarIcon`.
CarIconSpan	A span that replaces the text it is attached to with a `CarIcon` that is aligned with the surrounding text.
CarInfo	Manages access to car hardware specific info such as model, energy, and speed info.
CarLocation	Represents a geographical location with a latitude and a longitude.
CarNotificationManager	A manager for car apps to send notifications.
CarPendingIntent	A class which creates `PendingIntent`s that will start a car app, to be used in a notification action.
CarProtocol	Any class annotated with this marker is part of the protocol layer for remote host rendering.
CarSensors	Manages access to androidx.car.app.hardware specific sensors such as compass, accelerometer, and gyroscope.
CarSpan	Base class for all span types allowed for a car app.
CarText	A model that represents text to display in the car screen.
CarText.Builder	A builder of `CarText`.
CarToast	A message to show to the user for a short period of time.
CarUnit	Units such as speed and distance for car hardware measurements and display.
CarValue<T>	A data value object returned from car hardware with associated metadata including status, timestamp, and the actual value.
ChangeBounds	This transition captures the layout bounds of target views before and after the scene change and animates those changes during the transition.
ChangeClipBounds	ChangeClipBounds captures the `View.getClipBounds()` before and after the scene change and animates those changes during the transition.
ChangeImageTransform	This Transition captures an ImageView's matrix before and after the scene change and animates it during the transition.
ChangeScroll	This transition captures the scroll properties of targets before and after the scene change and animates any changes.
ChangeTransform	This Transition captures scale and rotation for Views before and after the scene change and animates those changes during the transition.
Channel	A convenience class to access `TvContractCompat.Channels` entries in the system content provider.
Channel.Builder	The builder class that makes it easy to chain setters to create a `Channel` object.
ChannelLogoUtils	A utility class for conveniently storing and loading channel logos.
CheckBoxPreference	A `Preference` that provides checkbox widget functionality.
CheckedTextViewCompat	Helper for accessing `CheckedTextView`.
CheckResult	Denotes that the annotated method returns a result that it typically is an error to ignore.
ChecksSdkIntAtLeast	Denotes that the annotated method checks if the SDK_INT API level is at least the given value, and either returns it or executes the given lambda in that case (or if it's a field, has the value true).
CipherSuiteNotSupportedException	Thrown if trying to use a cipher suite which isn't supported.
CircularArray<E>	CircularArray is a generic circular array data structure that provides O(1) random read, O(1) prepend and O(1) append.
CircularIntArray	CircularIntArray is a circular integer array data structure that provides O(1) random read, O(1) prepend and O(1) append.
CircularProgressDrawable	Drawable that renders the animated indeterminate progress indicator in the Material design style without depending on API level 11.
CircularProgressLayout	`CircularProgressLayout` adds a circular countdown timer behind the view it contains, typically used to automatically confirm an operation after a short delay has elapsed.
CircularProgressLayout.OnTimerFinishedListener	Interface to implement for listening to `onTimerFinished(CircularProgressLayout)` event.
CircularPropagation	A propagation that varies with the distance to the epicenter of the Transition or center of the scene if no epicenter exists.
Class2BiometricAuthPrompt	An authentication prompt that requires the user to present a Class 2 biometric (e.g.
Class2BiometricAuthPrompt.Builder	Builder for a `Class2BiometricAuthPrompt` with configurable options.
Class2BiometricOrCredentialAuthPrompt	An authentication prompt that requires the user to present a Class 2 biometric (e.g.
Class2BiometricOrCredentialAuthPrompt.Builder	Builder for a `Class2BiometricOrCredentialAuthPrompt` with configurable options.
Class3BiometricAuthPrompt	An authentication prompt that requires the user to present a Class 3 biometric (e.g.
Class3BiometricAuthPrompt.Builder	Builder for a `Class3BiometricAuthPrompt` with configurable options.
Class3BiometricOrCredentialAuthPrompt	An authentication prompt that requires the user to present a Class 3 biometric (e.g.
Class3BiometricOrCredentialAuthPrompt.Builder	Builder for a `Class3BiometricOrCredentialAuthPrompt` with configurable options.
ClassPresenterSelector	A ClassPresenterSelector selects a `Presenter` based on the item's Java class.
ClickableSpan	A span that makes a section of text clickable.
CollapsibleActionView	This interface is deprecated. Use the platform-provided `CollapsibleActionView` interface.
ColorBuilders	Builders for color utilities for layout elements.
ColorBuilders.ColorProp	A property defining a color.
ColorBuilders.ColorProp.Builder	Builder for `ColorBuilders.ColorProp`
ColorFilterCache	Cache of `ColorFilter`s for a given color at different alpha levels.
ColorFilterDimmer	Helper class for applying a dim level to a View.
ColorInt	Denotes that the annotated element represents a packed color int, `AARRGGBB`.
ColorLong	Denotes that the annotated element represents a packed color long.
ColorOverlayDimmer	Helper class for assigning a dim color to Paint.
ColorRes	Denotes that an integer parameter, field or method return value is expected to be a color resource reference (e.g.
ColorUtils	A set of color-related utility methods, building upon those available in `Color`.
ColumnInfo	Allows specific customization about the column associated with this field.
ColumnInfo.Collate
ColumnInfo.SQLiteTypeAffinity	The SQLite column type constants that can be used in `ColumnInfo.typeAffinity()`
Compass	Information about car specific compass available from the car hardware.
ComponentActivity	Base class for activities that enables composition of higher level components.
CompositeDrawable	Generic drawable class that can be composed of multiple children.
CompositeDrawable.ChildDrawable	Wrapper class holding a drawable object and `BoundsRule` to update drawable bounds when parent bound changes.
CompositePageTransformer	Allows for combining multiple `ViewPager2.PageTransformer` objects.
CompoundButtonCompat	Helper for accessing `CompoundButton`.
ConcatAdapter	An `RecyclerView.Adapter` implementation that presents the contents of multiple adapters in sequence.
ConcatAdapter.Config	The configuration object for a `ConcatAdapter`.
ConcatAdapter.Config.Builder	The builder for `ConcatAdapter.Config` class.
ConcatAdapter.Config.StableIdMode	Defines how `ConcatAdapter` handle stable ids (`RecyclerView.Adapter.hasStableIds()`).
Configuration	The Configuration object used to customize `WorkManager` upon initialization.
Configuration.Builder	A Builder for `Configuration`s.
Configuration.Provider	A class that can provide the `Configuration` for WorkManager and allow for on-demand initialization of WorkManager.
ConfigurationCompat	Helper class which allows access to properties of `Configuration` in a backward compatible fashion.
ConfigurationHelper	Helper class which allows access to properties of `Configuration` in a backward compatible fashion.
ConfirmationActivity	This Activity is used to display confirmation animations after the user completes an action on the wearable.
ConfirmationOverlay	Displays a full-screen confirmation animation with optional text and then hides it.
ConfirmationOverlay.OnAnimationFinishedListener	Interface for listeners to be notified when the `ConfirmationOverlay` animation has finished and its `View` has been removed.
ConfirmationOverlay.OverlayType	Types of animations to display in the overlay.
ConnectivityManagerCompat	Helper for accessing features in `ConnectivityManager`.
ConstraintManager	Manages various constraints on the library as enforced by the host.
Constraints	A specification of the requirements that need to be met before a `WorkRequest` can run.
Constraints.Builder	A Builder for a `Constraints` object.
Consumer<T>	Compat version of `Consumer`
ContentInfoCompat	Holds all the relevant data for a request to `OnReceiveContentListener`.
ContentInfoCompat.Builder	Builder for `ContentInfoCompat`.
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
ContentPager	`ContentPager` provides support for loading "paged" data on a background thread using the `ContentResolver` framework.
ContentPager.ContentCallback	Callback by which a client receives results of a query.
ContentPager.CursorDisposition
ContentPager.QueryRunner	Implementations of this interface provide the mechanism for execution of queries off the UI thread.
ContentPager.QueryRunner.Callback	Callback that receives a cursor once a query as been executed on the Runner.
ContentProviderCompat	Helper for accessing features in `ContentProvider` in a backwards compatible fashion.
ContentProviderWithCallbacks<T extends ContentProviderWithCallbacks>	Version of ContentProvider that can be used as a `CallbackReceiver`.
ContentRecommendation	The ContentRecommendation object encapsulates all application provided data for a single content recommendation item.
ContentRecommendation.Builder	Builder class for `ContentRecommendation` objects.
ContentRecommendation.ContentMaturity
ContentRecommendation.ContentPricing
ContentRecommendation.ContentStatus
ContentRecommendation.ContentType
ContentRecommendation.IntentData	Object used to encapsulate the data to be used to build the `PendingIntent` object associated with a given content recommendation, at the time this recommendation gets posted to the home Screen.
ContentRecommendation.IntentType
ContentResolverCompat	Helper for accessing features in `ContentResolver` in a backwards compatible fashion.
ContentView	Annotation that can be attached to a constructor with a single `LayoutRes` parameter to denote what layout the component intends to inflate and set as its content.
ContextAware	A `ContextAware` class is associated with a `Context` sometime after the class is instantiated.
ContextAwareHelper	Helper class for implementing `ContextAware`.
ContextCompat	Helper for accessing features in `Context`.
ContextThemeWrapper	A context wrapper that allows you to modify or replace the theme of the wrapped context.
ControlButtonPresenterSelector	Displays primary and secondary controls for a `PlaybackControlsRow`.
ConversationAction	Represents an action suggested by a `TextClassifier` on a given conversation.
ConversationAction.Builder	Builder class to construct `ConversationAction`.
ConversationActions	Represents a list of actions suggested by a `TextClassifier` on a given conversation.
ConversationActions.Message	Represents a message in the conversation.
ConversationActions.Message.Builder	Builder class to construct a `ConversationActions.Message`
ConversationActions.Request	A request object for generating conversation action suggestions.
ConversationActions.Request.Builder	Builder object to construct the `ConversationActions.Request` object.
CoordinateTransform	This class represents the transform from one `OutputTransform` to another.
CoordinatorLayout	CoordinatorLayout is a super-powered `FrameLayout`.
CoordinatorLayout.AttachedBehavior	Defines the default attached `CoordinatorLayout.Behavior` of a `View` class When writing a custom view, implement this interface to return the default behavior when used as a direct child of an `CoordinatorLayout`.
CoordinatorLayout.Behavior<V extends View>	Interaction behavior plugin for child views of `CoordinatorLayout`.
CoordinatorLayout.DefaultBehavior	This @interface is deprecated. Use `CoordinatorLayout.AttachedBehavior` instead
CoordinatorLayout.LayoutParams	Parameters describing the desired layout for a child of a `CoordinatorLayout`.
CoordinatorLayout.SavedState
CountingTaskExecutorRule	A JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which counts the tasks as they are start and finish.
CredentialAuthPrompt	An authentication prompt that requires the user to present the screen lock credential (i.e.
CredentialAuthPrompt.Builder	Builder for a `CredentialAuthPrompt` with configurable options.
CursorAdapter	Static library support version of the framework's `CursorAdapter`.
CursorLoader	Static library support version of the framework's `CursorLoader`.
CursorMapper	Abstract class used to convert the current `Cursor` row to a single object.
CursorObjectAdapter	An `ObjectAdapter` implemented with a `Cursor`.
CursorWindowCompat	Helper for accessing features in `CursorWindow`
CurvedTextView	CurvedTextView is a component allowing developers to easily write curved text following the curvature of the largest circle that can be inscribed in the view.
CurvingLayoutCallback	An implementation of the `WearableLinearLayoutManager.LayoutCallback` aligning the children of the associated `WearableRecyclerView` along a pre-defined vertical curve.
CustomTabColorSchemeParams	Contains visual parameters of a Custom Tab that may depend on the color scheme.
CustomTabColorSchemeParams.Builder	Builder class for `CustomTabColorSchemeParams` objects.
CustomTabsCallback	A callback class for custom tabs client to get messages regarding events in their custom tabs.
CustomTabsClient	Class to communicate with a `CustomTabsService` and create `CustomTabsSession` from it.
CustomTabsIntent	Class holding the `Intent` and start bundle for a Custom Tabs Activity.
CustomTabsIntent.Builder	Builder class for `CustomTabsIntent` objects.
CustomTabsService	Abstract service class for implementing Custom Tabs related functionality.
CustomTabsService.Relation
CustomTabsService.Result
CustomTabsServiceConnection	Abstract `ServiceConnection` to use while binding to a `CustomTabsService`.
CustomTabsSession	A class to be used for Custom Tabs related communication.
CustomTabsSessionToken	Wrapper class that can be used as a unique identifier for a session.
CycleInterpolator	Repeats the animation for a specified number of cycles.

D

Dao	Marks the class as a Data Access Object.
Data	A persistable set of key/value pairs which are used as inputs and outputs for `ListenableWorker`s.
Data.Builder	A builder for `Data` objects.
Database	Marks a class as a RoomDatabase.
DatabaseConfiguration	Configuration class for a `RoomDatabase`.
DatabaseUtilsCompat	This class is deprecated. Use `DatabaseUtils` directly.
DatabaseView	Marks a class as an SQLite view.
DataSourceCallback	For supplying media data, implement this if your app has special requirements for the way media data is obtained.
DatePicker	`DatePicker` is a directly subclass of `Picker`.
DateTimeWithZone	A time with an associated time zone information.
DecelerateInterpolator	An interpolator where the rate of change starts out quickly and and then decelerates.
DefaultEmojiCompatConfig	The default config will use downloadable fonts to fetch the emoji compat font file.
DefaultItemAnimator	This implementation of `RecyclerView.ItemAnimator` provides basic animations on remove, add, and move events that happen to the items in a RecyclerView.
DefaultLifecycleObserver	Callback interface for listening to `LifecycleOwner` state changes.
DelegatingWorkerFactory	A `WorkerFactory` which delegates to other factories.
Delete	Marks a method in a `Dao` annotated class as a delete method.
DeleteColumn	Repeatable annotation declaring the deleted columns in the `AutoMigration.to()` version of an auto migration.
DeleteColumn.Entries	Container annotation for the repeatable annotation `DeleteColumn`.
DeleteTable	Repeatable annotation declaring the deleted tables in the `AutoMigration.to()` version of an auto migration.
DeleteTable.Entries	Container annotation for the repeatable annotation `DeleteTable`.
Destination	A class representing information related to a destination.
Destination.Builder	A builder of `Destination`.
DetailsFragment	This class is deprecated. use `DetailsSupportFragment`
DetailsFragmentBackgroundController	This class is deprecated. use `DetailsSupportFragmentBackgroundController`
DetailsOverviewLogoPresenter	Presenter that responsible to create a ImageView and bind to DetailsOverviewRow.
DetailsOverviewLogoPresenter.ViewHolder	ViewHolder for Logo view of DetailsOverviewRow.
DetailsOverviewRow	An overview `Row` for a details fragment.
DetailsOverviewRow.Listener	Listener for changes of DetailsOverviewRow.
DetailsOverviewRowPresenter	This class is deprecated. Use `FullWidthDetailsOverviewRowPresenter`
DetailsOverviewRowPresenter.ViewHolder	A ViewHolder for the DetailsOverviewRow.
DetailsParallax	Subclass of Parallax object that tracks overview row's top and bottom edge in DetailsFragment or DetailsSupportFragment.
DetailsSupportFragment	A fragment for creating Leanback details screens.
DetailsSupportFragmentBackgroundController	Controller for DetailsSupportFragment parallax background and embedded video play.
DeviceParametersBuilders	Builders for request messages used to fetch tiles and resources.
DeviceParametersBuilders.DeviceParameters	Parameters describing the device requesting a tile update.
DeviceParametersBuilders.DeviceParameters.Builder	Builder for `DeviceParametersBuilders.DeviceParameters`
DeviceWearableButtonsProvider	Default implementation of `WearableButtonsProvider`, that reads the button locations from the platform.
DialogCompat	Helper for accessing features in `Dialog` in a backwards compatible fashion.
DialogFragment	Static library support version of the framework's `DialogFragment`.
DialogPreference	A base class for `Preference`s that are dialog-based.
DialogPreference.TargetFragment	Interface for `PreferenceFragmentCompat`s to implement to allow `DialogPreference`s to find the preference that launched the dialog.
DiffCallback<Value>	Callback that informs `ArrayObjectAdapter` how to compute list updates when using `DiffUtil` in `ArrayObjectAdapter.setItems(List, DiffCallback)` method.
DiffUtil	DiffUtil is a utility class that calculates the difference between two lists and outputs a list of update operations that converts the first list into the second one.
DiffUtil.Callback	A Callback class used by DiffUtil while calculating the diff between two lists.
DiffUtil.DiffResult	This class holds the information about the result of a `DiffUtil.calculateDiff(Callback, boolean)` call.
DiffUtil.ItemCallback<T>	Callback for calculating the diff between two non-null items in a list.
DimenRes	Denotes that an integer parameter, field or method return value is expected to be a dimension resource reference (e.g.
Dimension	Denotes that an integer parameter, field or method return value is expected to represent a dimension.
DimensionBuilders	Builders for dimensions for layout elements.
DimensionBuilders.ContainerDimension	Interface defining a dimension that can be applied to a container.
DimensionBuilders.ContainerDimension.Builder	Builder to create `DimensionBuilders.ContainerDimension` objects.
DimensionBuilders.DegreesProp	A type for angular dimensions, measured in degrees.
DimensionBuilders.DegreesProp.Builder	Builder for `DimensionBuilders.DegreesProp`
DimensionBuilders.DpProp	A type for linear dimensions, measured in dp.
DimensionBuilders.DpProp.Builder	Builder for `DimensionBuilders.DpProp`.
DimensionBuilders.EmProp	A type for font spacing, measured in em.
DimensionBuilders.EmProp.Builder	Builder for `DimensionBuilders.EmProp`
DimensionBuilders.ExpandedDimensionProp	A type for a dimension that fills all the space it can (i.e.
DimensionBuilders.ExpandedDimensionProp.Builder	Builder for `DimensionBuilders.ExpandedDimensionProp`.
DimensionBuilders.ImageDimension	Interface defining a dimension that can be applied to an image.
DimensionBuilders.ImageDimension.Builder	Builder to create `DimensionBuilders.ImageDimension` objects.
DimensionBuilders.ProportionalDimensionProp	A type for a dimension that scales itself proportionally to another dimension such that the aspect ratio defined by the given width and height values is preserved.
DimensionBuilders.ProportionalDimensionProp.Builder	Builder for `DimensionBuilders.ProportionalDimensionProp`.
DimensionBuilders.SpacerDimension	Interface defining a dimension that can be applied to a spacer.
DimensionBuilders.SpacerDimension.Builder	Builder to create `DimensionBuilders.SpacerDimension` objects.
DimensionBuilders.SpProp	A type for font sizes, measured in sp.
DimensionBuilders.SpProp.Builder	Builder for `DimensionBuilders.SpProp`
DimensionBuilders.WrappedDimensionProp	A type for a dimension that sizes itself to the size of its children (i.e.
DimensionBuilders.WrappedDimensionProp.Builder	Builder for `DimensionBuilders.WrappedDimensionProp`.
DismissibleFrameLayout	Special FrameLayout that is dismissible by the Back button press, and by left to right swipe when the SwipeToDismiss is been enabled on the device config or themes.
DismissibleFrameLayout.Callback	Implement this callback to act on particular stage of the dismissal.
DisplayCompat	A class for retrieving accurate display modes for a display.
DisplayCompat.ModeCompat	Compat class which provides access to the underlying display mode, if there is one, and a more reliable display mode size.
DisplayCutoutCompat	Represents the area of the display that is not functional for displaying content.
DisplayManagerCompat	Helper for accessing features in `DisplayManager`.
DisplayOrientedMeteringPointFactory	A `MeteringPointFactory` that can convert a `View` (x, y) into a `MeteringPoint` which can then be used to construct a `FocusMeteringAction` to start a focus and metering action.
Distance	Represents a distance value and how it should be displayed in the UI.
DistanceSpan	A span that replaces the text it is attached to with the string representation of a `Distance` instance.
DividerItemDecoration	DividerItemDecoration is a `RecyclerView.ItemDecoration` that can be used as a divider between items of a `LinearLayoutManager`.
DividerPresenter	DividerPresenter provides a default presentation for `DividerRow` in HeadersFragment.
DividerRow	Used to represent divider in HeadersFragment.
DocTypeNotSupportedException	Thrown if trying to create a credential with an unsupported document type.
Document	Marks a class as an entity known to AppSearch containing a data record.
Document.BooleanProperty	Configures a boolean member field of a class as a property known to AppSearch.
Document.BytesProperty	Configures a byte array member field of a class as a property known to AppSearch.
Document.CreationTimestampMillis	Marks a member field of a document as the document's creation timestamp.
Document.DocumentProperty	Configures a member field of a class as a property known to AppSearch.
Document.DoubleProperty	Configures a double-precision decimal number field of a class as a property known to AppSearch.
Document.Id	Marks a member field of a document as the document's unique identifier (ID).
Document.LongProperty	Configures a 64-bit integer field of a class as a property known to AppSearch.
Document.Namespace	Marks a member field of a document as the document's namespace.
Document.Score	Marks a member field of a document as the document's query-independent score.
Document.StringProperty	Configures a string member field of a class as a property known to AppSearch.
Document.TtlMillis	Marks a member field of a document as the document's time-to-live (TTL).
DocumentClassFactory<T>	An interface for factories which can convert between instances of classes annotated with \@`Document` and instances of `GenericDocument`.
DocumentFile	Representation of a document backed by either a `DocumentsProvider` or a raw file on disk.
DoNotInline	Denotes that the annotated method should not be inlined when the code is optimized at build time.
DragAndDropPermissionsCompat	Helper for accessing features in `DragAndDropPermissions` a backwards compatible fashion.
DragStartHelper	DragStartHelper is a utility class for implementing drag and drop support.
DragStartHelper.OnDragStartListener	Interface definition for a callback to be invoked when a drag start gesture is detected.
DrawableCompat	Helper for accessing features in `Drawable`.
DrawableRes	Denotes that an integer parameter, field or method return value is expected to be a drawable resource reference (e.g.
DrawerArrowDrawable	A drawable that can draw a "Drawer hamburger" menu or an arrow and animate between them.
DrawerLayout	DrawerLayout acts as a top-level container for window content that allows for interactive "drawer" views to be pulled out from one or both vertical edges of the window.
DrawerLayout.DrawerListener	Listener for monitoring events about drawers.
DrawerLayout.LayoutParams
DrawerLayout.SavedState	State persisted across instances
DrawerLayout.SimpleDrawerListener	Stub/no-op implementations of all methods of `DrawerLayout.DrawerListener`.
DropDownPreference	A `ListPreference` that presents the options in a drop down menu rather than a dialog.
DurationSpan	A span that replaces the text it is attached to with a localized duration string.
DynamicAnimation<T extends DynamicAnimation<T>>	This class is the base class of physics-based animations.
DynamicAnimation.OnAnimationEndListener	An animation listener that receives end notifications from an animation.
DynamicAnimation.OnAnimationUpdateListener	Implementors of this interface can add themselves as update listeners to an `DynamicAnimation` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `DynamicAnimation`.
DynamicAnimation.ViewProperty	ViewProperty holds the access of a property of a `View`.

E

EdgeEffectCompat	Helper for accessing `EdgeEffect`.
EditorInfoCompat	Helper for accessing features in `EditorInfo` in a backwards compatible fashion.
EditTextPreference	A `DialogPreference` that shows a `EditText` in the dialog.
EditTextPreference.OnBindEditTextListener	Interface definition for a callback to be invoked when the corresponding dialog view for this preference is bound.
EditTextPreference.SimpleSummaryProvider	A simple `Preference.SummaryProvider` implementation for an `EditTextPreference`.
EditTextPreferenceDialogFragment	This class is deprecated. Use `EditTextPreferenceDialogFragmentCompat` instead
EditTextPreferenceDialogFragmentCompat
Embedded	Marks a field of an `Entity` or POJO to allow nested fields (i.e.
EmojiAppCompatButton	AppCompatButton widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiAppCompatEditText	AppCompatEditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiAppCompatTextView	AppCompatTextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiButton	Button widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiButton	Button widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiCompat	Main class to keep Android devices up to date with the newest emojis by adding `EmojiSpan`s to a given `CharSequence`.
EmojiCompat	Main class to keep Android devices up to date with the newest emojis by adding `EmojiSpan`s to a given `CharSequence`.
EmojiCompat.Config	Configuration class for EmojiCompat.
EmojiCompat.Config	Configuration class for EmojiCompat.
EmojiCompat.GlyphChecker	Interface to check if a given emoji exists on the system.
EmojiCompat.GlyphChecker	Interface to check if a given emoji exists on the system.
EmojiCompat.InitCallback	Listener class for the initialization of the EmojiCompat.
EmojiCompat.InitCallback	Listener class for the initialization of the EmojiCompat.
EmojiCompat.MetadataRepoLoader	Interface to load emoji metadata.
EmojiCompat.MetadataRepoLoader	Interface to load emoji metadata.
EmojiCompat.MetadataRepoLoaderCallback	Callback to inform EmojiCompat about the state of the metadata load.
EmojiCompat.MetadataRepoLoaderCallback	Callback to inform EmojiCompat about the state of the metadata load.
EmojiCompatConfigurationView	Interface for Views that expose EmojiCompat configuration.
EmojiCompatInitializer	Initializer for configuring EmojiCompat with the system installed downloadable font provider.
EmojiEditText	EditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiEditText	EditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiEditTextHelper	Utility class to enhance custom EditText widgets with `EmojiCompat`.
EmojiEditTextHelper	Utility class to enhance custom EditText widgets with `EmojiCompat`.
EmojiExtractTextLayout	Layout that contains emoji compatibility enhanced ExtractEditText.
EmojiExtractTextLayout	Layout that contains emoji compatibility enhanced ExtractEditText.
EmojiSpan	Base span class for the emoji replacement.
EmojiSpan	Base span class for the emoji replacement.
EmojiTextView	TextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiTextView	TextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiTextViewHelper	Utility class to enhance custom TextView widgets with `EmojiCompat`.
EmojiTextViewHelper	Utility class to enhance custom TextView widgets with `EmojiCompat`.
EmptyResultSetException	Thrown by Room when the query in a Single<T> DAO method needs to return a result but the returned result from the database is empty.
EmptyResultSetException	Thrown by Room when the query in a Single<T> DAO method needs to return a result but the returned result from the database is empty.
EncryptedFile	Class used to create and read encrypted files.
EncryptedFile.Builder	Builder class to configure EncryptedFile
EncryptedFile.FileEncryptionScheme	The encryption scheme to encrypt files.
EncryptedSharedPreferences	An implementation of `SharedPreferences` that encrypts keys and values.
EncryptedSharedPreferences.PrefKeyEncryptionScheme	The encryption scheme to encrypt keys.
EncryptedSharedPreferences.PrefValueEncryptionScheme	The encryption scheme to encrypt values.
EnergyLevel	Information of the energy (fuel and battery) levels from the car hardware.
EnergyLevel.Builder	A builder of `EnergyLevel`.
EnergyProfile	Information about car hardware fuel profile such as fuel types and connector ports.
EnergyProfile.Builder	A builder of `EnergyProfile`.
Entity	Marks a class as an entity.
EnvironmentCompat	Helper for accessing features in `Environment`.
EphemeralPublicKeyNotFoundException	Thrown if the ephemeral public key was not found in the session transcript passed to `IdentityCredential.getEntries(byte[], Map, byte[])`.
ErrorFragment	This class is deprecated. use `ErrorSupportFragment`
ErrorSupportFragment	A fragment for displaying an error indication.
EventBuilders	Builders for messages used when events happen in the Tiles system.
EventBuilders.TileAddEvent	Event fired when a tile has been added to the carousel.
EventBuilders.TileAddEvent.Builder	Builder for `EventBuilders.TileAddEvent`
EventBuilders.TileEnterEvent	Event fired when a tile is swiped to by the user (i.e.
EventBuilders.TileEnterEvent.Builder	Builder for `EventBuilders.TileEnterEvent`
EventBuilders.TileLeaveEvent	Event fired when a tile is swiped away from by the user (i.e.
EventBuilders.TileLeaveEvent.Builder	Builder for `EventBuilders.TileLeaveEvent`
EventBuilders.TileRemoveEvent	Event fired when a tile has been removed from the carousel.
EventBuilders.TileRemoveEvent.Builder	Builder for `EventBuilders.TileRemoveEvent`
EventInfo	Represents information associated with a logged event on `SliceView`.
ExecutorCompat	Helper for accessing features in `Executor`.
ExifInterface	This is a class for reading and writing Exif tags in various image file formats.
ExistingPeriodicWorkPolicy	An enumeration of the conflict resolution policies available to unique `PeriodicWorkRequest`s in case of a collision.
ExistingWorkPolicy	An enumeration of the conflict resolution policies available to unique `OneTimeWorkRequest`s in case of a collision.
ExperimentalCamera2Interop	Denotes that the annotated method uses the experimental methods which allow direct access to camera2 classes.
ExperimentalCameraProviderConfiguration	Denotes that the annotated method uses an experimental path for configuring a camera provider.
ExperimentalCarApi	Any declaration annotated with this marker is considered unstable API, subject to change.
ExperimentalExpeditedWork	An API surface for expedited `WorkRequest`s.
ExperimentalGetImage	Denotes that the annotated method uses the experimental `ImageProxy.getImage()` method.
ExperimentalRoomApi	APIs marked with ExperimentalRoomApi are experimental and may change.
ExperimentalUseCaseGroup	Denotes that the annotated classes and methods uses the experimental feature which provides a grouping mechanism for `UseCase`s.
ExperimentalUseCaseGroupLifecycle	Same as `ExperimentalUseCaseGroup`.
ExperimentalVideo	Denotes that the annotated method uses the experimental methods which allow for video recording.
Explode	This transition tracks changes to the visibility of target views in the start and end scenes and moves views in or out from the edges of the scene.
ExploreByTouchHelper	ExploreByTouchHelper is a utility class for implementing accessibility support in custom `View`s that represent a collection of View-like logical items.
ExposureState	An interface which contains the camera exposure related information.
ExtendableBuilder<T>	Extendable builders are used to add externally defined options that can be passed to the implementation being built.
ExtensionMode	The available modes for the extensions.
ExtensionsErrorListener	This interface is deprecated. Currently, this interface is only used to monitor whether a `Preview` or `ImageCapture` is lacking when enabling extension modes. CameraX will automatically add an extra `Preview` or `ImageCapture` to make the extension functions work well. After that, no error will be reported via this interface.
ExtensionsErrorListener.ExtensionsErrorCode	Types of error when extensions function is enabled.
ExtensionsManager	Provides interfaces for third party app developers to get capabilities info of extension functions.
ExtensionsManager.EffectMode	This enum is deprecated. Use `ExtensionMode` to call the new `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` and `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` APIs.
ExtensionsManager.ExtensionsAvailability
ExternalInput	Identifies parameters of an `RemoteCallable` that will be pulled from the caller of the callback.
ExtrasUtils	Utilities for inserting/retrieving data into/from textclassifier related results and intents.

F

FacetProvider	This is the query interface to supply optional features(aka facets) on an object without the need of letting the object to subclass or implement java interfaces.
FacetProviderAdapter	Optional interface that implemented by `RecyclerView.Adapter` to query `FacetProvider` for a given item view type within Adapter.
Fade	This transition tracks changes to the visibility of target views in the start and end scenes and fades views in or out when they become visible or non-visible.
FailureResponse	Denotes a failure in the client to a host request.
FakeHost	A fake that simulates the behavior of the host of a car app.
FakeKeyedAppStatesReporter	A fake `KeyedAppStatesReporter` for testing.
FastOutLinearInInterpolator	Interpolator corresponding to `R.interpolator.fast_out_linear_in`.
FastOutSlowInInterpolator	Interpolator corresponding to `R.interpolator.fast_out_slow_in`.
Features	Class containing all the features the support library can support.
FileMediaItem	Structure for media item for a file.
FileMediaItem.Builder	This Builder class simplifies the creation of a `FileMediaItem` object.
FileProvider	FileProvider is a special subclass of `ContentProvider` that facilitates secure sharing of files associated with an app by creating a `content://` `Uri` for a file instead of a `file:///` `Uri`.
FileTransformFactory	Factory for extracting transform info from image files.
FingerprintManagerCompat	This class is deprecated. Use `androidx.biometrics.BiometricPrompt` instead.
FingerprintManagerCompat.AuthenticationCallback	Callback structure provided to `FingerprintManagerCompat.authenticate(CryptoObject, int, CancellationSignal, AuthenticationCallback, Handler)`.
FingerprintManagerCompat.AuthenticationResult	Container for callback data from `FingerprintManagerCompat.authenticate(CryptoObject, int, CancellationSignal, AuthenticationCallback, Handler)`.
FingerprintManagerCompat.CryptoObject	A wrapper class for the crypto objects supported by FingerprintManager.
FitWidthBitmapDrawable	Subclass of `Drawable` that can be used to draw a bitmap into a region.
FlingAnimation	Fling animation is an animation that continues an initial momentum (most often from gesture velocity) and gradually slows down.
FloatArrayEvaluator	This evaluator can be used to perform type interpolation between `float[]` values.
FloatEvaluator	This evaluator can be used to perform type interpolation between `float` values.
FloatProperty<T>	An implementation of `Property` to be used specifically with fields of type `float`.
FloatPropertyCompat<T>	FloatPropertyCompat is an abstraction that can be used to represent a mutable float value that is held in a host object.
FloatRange	Denotes that the annotated element should be a float or double in the given range Example: `@FloatRange(from=0.0,to=1.0) public float getAlpha() { ...`
FloatValueHolder	FloatValueHolder holds a float value.
FocusDelegate<K>	Override methods in this class to provide application specific behaviors related to focusing item.
FocusHighlight	Interface for highlighting the item that has focus.
FocusHighlightHelper	Sets up the highlighting behavior when an item gains focus.
FocusMeteringAction	A configuration used to trigger a focus and/or metering action.
FocusMeteringAction.Builder	The builder used to create the `FocusMeteringAction`.
FocusMeteringResult	Result of the `CameraControl.startFocusAndMetering(FocusMeteringAction)`.
FontRequest	Information about a font request that may be sent to a Font Provider.
FontRequestEmojiCompatConfig	`EmojiCompat.Config` implementation that asynchronously fetches the required font and the metadata using a `FontRequest`.
FontRequestEmojiCompatConfig	`EmojiCompat.Config` implementation that asynchronously fetches the required font and the metadata using a `FontRequest`.
FontRequestEmojiCompatConfig.ExponentialBackoffRetryPolicy	A retry policy implementation that doubles the amount of time in between retries.
FontRequestEmojiCompatConfig.ExponentialBackoffRetryPolicy	A retry policy implementation that doubles the amount of time in between retries.
FontRequestEmojiCompatConfig.RetryPolicy	Retry policy used when the font provider is not ready to give the font file.
FontRequestEmojiCompatConfig.RetryPolicy	Retry policy used when the font provider is not ready to give the font file.
FontRes	Denotes that an integer parameter, field or method return value is expected to be a font resource reference (e.g.
FontsContractCompat	Utility class to deal with Font ContentProviders.
FontsContractCompat.Columns	Defines the constants used in a response from a Font Provider.
FontsContractCompat.FontFamilyResult	Object returned from `FontsContractCompat.fetchFonts(Context, CancellationSignal, FontRequest)`.
FontsContractCompat.FontInfo	Object represent a font entry in the family returned from `FontsContractCompat.fetchFonts(Context, CancellationSignal, FontRequest)`.
FontsContractCompat.FontRequestCallback	Interface used to receive asynchronously fetched typefaces.
ForegroundCarColorSpan	A span that changes the color of the text to which the span is attached.
ForegroundInfo	The information required when a `ListenableWorker` runs in the context of a foreground service.
ForegroundUpdater	Manages updating `Notification`s when a `ListenableWorker` transitions to running in the context of a foreground `Service`.
ForeignKey	Declares a foreign key on another `Entity`.
ForeignKey.Action	Constants definition for values that can be used in `ForeignKey.onDelete()` and `ForeignKey.onUpdate()`.
FractionRes	Denotes that an integer parameter, field or method return value is expected to be a fraction resource reference.
Fragment	Static library support version of the framework's `Fragment`.
Fragment.InstantiationException	Thrown by `FragmentFactory.instantiate(ClassLoader, String)` when there is an instantiation failure.
Fragment.SavedState	State information that has been retrieved from a fragment instance through `FragmentManager.saveFragmentInstanceState`.
FragmentActivity	Base class for activities that want to use the support-based `Fragments`.
FragmentAnimationProvider	FragmentAnimationProvider supplies animations for use during a fragment's onCreateAnimator callback.
FragmentContainer	Callbacks to a `Fragment`'s container.
FragmentContainerView	FragmentContainerView is a customized Layout designed specifically for Fragments.
FragmentController	Provides integration points with a `FragmentManager` for a fragment host.
FragmentFactory	Interface used to control the instantiation of `Fragment` instances.
FragmentHostCallback<E>	Integration points with the Fragment host.
FragmentManager	Static library support version of the framework's `FragmentManager`.
FragmentManager.BackStackEntry	Representation of an entry on the fragment back stack, as created with `FragmentTransaction.addToBackStack()`.
FragmentManager.FragmentLifecycleCallbacks	Callback interface for listening to fragment state changes that happen within a given FragmentManager.
FragmentManager.OnBackStackChangedListener	Interface to watch for changes to the back stack.
FragmentManagerNonConfig	This class is deprecated. Have your `FragmentHostCallback` implement `ViewModelStoreOwner` to automatically retain the Fragment's non configuration state.
FragmentOnAttachListener	Listener for receiving a callback immediately following `Fragment.onAttach(Context)`.
FragmentPagerAdapter	This class is deprecated. Switch to `ViewPager2` and use `FragmentStateAdapter` instead.
FragmentResultListener	Listener for handling fragment results.
FragmentResultOwner	A class that manages passing data between fragments.
FragmentReuseViolation	See #`FragmentStrictMode.Policy.Builder.detectFragmentReuse()`.
FragmentStateAdapter	Similar in behavior to `FragmentStatePagerAdapter` Lifecycle within `RecyclerView`: `RecyclerView.ViewHolder` initially an empty `FrameLayout`, serves as a re-usable container for a `Fragment` in later stages.
FragmentStateAdapter.FragmentTransactionCallback	Callback interface for listening to fragment lifecycle changes that happen inside the adapter.
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener	Callback returned by `FragmentStateAdapter.FragmentTransactionCallback.onFragmentPreAdded(Fragment)`, `FragmentStateAdapter.FragmentTransactionCallback.onFragmentPreRemoved(Fragment)`, `FragmentStateAdapter.FragmentTransactionCallback.onFragmentMaxLifecyclePreUpdated(Fragment, Lifecycle.State)` called after the operation ends.
FragmentStatePagerAdapter	This class is deprecated. Switch to `ViewPager2` and use `FragmentStateAdapter` instead.
FragmentStrictMode	FragmentStrictMode is a tool which detects things you might be doing by accident and brings them to your attention so you can fix them.
FragmentStrictMode.OnViolationListener	When #`FragmentStrictMode.Policy.Builder.penaltyListener(FragmentStrictMode.OnViolationListener)` is enabled, the listener is called when a violation occurs.
FragmentStrictMode.Policy	`FragmentStrictMode` policy applied to a certain `FragmentManager` (or globally).
FragmentStrictMode.Policy.Builder	Creates `FragmentStrictMode.Policy` instances.
FragmentTabHost	This class is deprecated. Use TabLayout and ViewPager instead.
FragmentTagUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectFragmentTagUsage()`.
FragmentTransaction	Static library support version of the framework's `FragmentTransaction`.
FragmentViewHolder	`RecyclerView.ViewHolder` implementation for handling `Fragment`s.
FrameMetricsAggregator	This class can be used to record and return data about per-frame durations.
FrameworkSQLiteOpenHelperFactory	Implements `SupportSQLiteOpenHelper.Factory` using the SQLite implementation in the framework.
Fts3	Marks an `Entity` annotated class as a FTS3 entity.
Fts4	Marks an `Entity` annotated class as a FTS4 entity.
FtsOptions	Available option values that can be used with `Fts3` & `Fts4`.
FtsOptions.MatchInfo
FtsOptions.Order
FullWidthDetailsOverviewRowPresenter	Renders a `DetailsOverviewRow` to display an overview of an item.
FullWidthDetailsOverviewRowPresenter.Listener	Listeners for events on ViewHolder.
FullWidthDetailsOverviewRowPresenter.ViewHolder	A ViewHolder for the DetailsOverviewRow.
FullWidthDetailsOverviewRowPresenter.ViewHolder.DetailsOverviewRowListener
FullWidthDetailsOverviewSharedElementHelper	Helper class to assist delayed shared element activity transition for view created by `FullWidthDetailsOverviewRowPresenter`.
Function<I, O>	Represents a function.

G

GenericDocument	Represents a document unit.
GenericDocument.Builder<BuilderType extends Builder>	The builder class for `GenericDocument`.
GestureDetectorCompat	Detects various gestures and events using the supplied `MotionEvent`s.
GetByDocumentIdRequest	Encapsulates a request to retrieve documents by namespace and IDs from the `AppSearchSession` database.
GetByDocumentIdRequest.Builder	Builder for `GetByDocumentIdRequest` objects.
GetRetainInstanceUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectRetainInstanceUsage()`.
GetSchemaResponse	The response class of `AppSearchSession.getSchema()`
GetSchemaResponse.Builder	Builder for `GetSchemaResponse` objects.
GetTargetFragmentRequestCodeUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectTargetFragmentUsage()`.
GetTargetFragmentUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectTargetFragmentUsage()`.
GlobalSearchSession	Provides a connection to all AppSearch databases the querying application has been granted access to.
GnssStatusCompat	GnssStatus representation that works across all Android versions.
GnssStatusCompat.Callback	See `GnssStatus.Callback`.
GravityCompat	Compatibility shim for accessing newer functionality from `Gravity`.
GravityInt	Denotes that the annotated element represents a packed gravity int.
GridItem	Represents a grid item with an image and an optional title.
GridItem.Builder	A builder of `GridItem`.
GridLayout	A layout that places its children in a rectangular grid.
GridLayout.Alignment	Alignments specify where a view should be placed within a cell group and what size it should be.
GridLayout.LayoutParams	Layout information associated with each of the children of a GridLayout.
GridLayout.Spec	A Spec defines the horizontal or vertical characteristics of a group of cells.
GridLayoutManager	A `RecyclerView.LayoutManager` implementation that lays out items in a grid for leanback `VerticalGridView` and `HorizontalGridView`.
GridLayoutManager	A `RecyclerView.LayoutManager` implementations that lays out items in a grid.
GridLayoutManager.DefaultSpanSizeLookup	Default implementation for `GridLayoutManager.SpanSizeLookup`.
GridLayoutManager.LayoutParams	LayoutParams used by GridLayoutManager.
GridLayoutManager.SpanSizeLookup	A helper class to provide the number of spans each item occupies.
GridRowBuilder	Builder to construct a grid row which may be added as a row to `ListBuilder`.
GridRowBuilder.CellBuilder	Builder to construct a cell.
GridTemplate	A template representing a grid of items.
GridTemplate.Builder	A builder of `GridTemplate`.
GuardedBy	Denotes that the annotated method or field can only be accessed when holding the referenced lock.
GuidanceStylist	GuidanceStylist is used within a `GuidedStepFragment` to display contextual information for the decision(s) required at that step.
GuidanceStylist.Guidance	A data class representing contextual information for a `GuidedStepFragment`.
GuidedAction	A data class which represents an action within a `GuidedStepFragment`.
GuidedAction.Builder	Builds a `GuidedAction` object.
GuidedAction.BuilderBase<B extends BuilderBase>	Base builder class to build a `GuidedAction` object.
GuidedActionAutofillSupport	Interface for a custom EditText subclass to support autofill in `GuidedStepSupportFragment`.
GuidedActionAutofillSupport.OnAutofillListener	Listener for autofill event.
GuidedActionDiffCallback	DiffCallback used for GuidedActions, see `GuidedStepSupportFragment.setActionsDiffCallback(DiffCallback)`.
GuidedActionEditText	A custom EditText that satisfies the IME key monitoring requirements of GuidedStepFragment.
GuidedActionsStylist	GuidedActionsStylist is used within a `GuidedStepFragment` to supply the right-side panel where users can take actions.
GuidedActionsStylist.ViewHolder	ViewHolder caches information about the action item layouts' subviews.
GuidedDatePickerAction	Subclass of GuidedAction that can choose a date.
GuidedDatePickerAction.Builder	Builder class to build a GuidedDatePickerAction.
GuidedDatePickerAction.BuilderBase<B extends BuilderBase>	Base Builder class to build GuidedDatePickerAction.
GuidedStepFragment	This class is deprecated. use `GuidedStepSupportFragment`
GuidedStepSupportFragment	A GuidedStepSupportFragment is used to guide the user through a decision or series of decisions.
Gyroscope	Information about car specific gyroscopes available from the car hardware.

H

HalfFloat	Denotes that the annotated element represents a half-precision floating point value.
HandlerCompat	Helper for accessing features in `Handler`.
HandshakeInfo	A container for the information conveyed by the host after the handshake with the app is completed.
HasDefaultViewModelProviderFactory	Interface that marks a `ViewModelStoreOwner` as having a default `ViewModelProvider.Factory` for use with `ViewModelProvider.ViewModelProvider(ViewModelStoreOwner)`.
HdrImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
HdrPreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
HeaderItem	A header item describes the metadata of a `Row`, such as a category of media items.
HeadersFragment	This class is deprecated. use `HeadersSupportFragment`
HeadersFragment.OnHeaderClickedListener	This interface is deprecated. use `HeadersSupportFragment`
HeadersFragment.OnHeaderViewSelectedListener	This interface is deprecated. use `HeadersSupportFragment`
HeadersSupportFragment	An fragment containing a list of row headers.
HeadersSupportFragment.OnHeaderClickedListener	Interface definition for a callback to be invoked when a header item is clicked.
HeadersSupportFragment.OnHeaderViewSelectedListener	Interface definition for a callback to be invoked when a header item is selected.
HeartRating	A class for rating with a single degree of rating, "heart" vs "no heart".
HeifWriter	This class writes one or more still images (of the same dimensions) into a heif file.
HeifWriter.Builder	Builder class for constructing a HeifWriter object from specified parameters.
HiltWorker	A type annotation that identifies a `ListenableWorker`'s constructor for injection.
HiltWorkerFactory	Worker Factory for the Hilt Extension A provider for this factory will be installed in the `SingletonComponent`.
HintConstants	Contains all the officially supported autofill hint constants.
HorizontalGridView	A `ViewGroup` that shows items in a horizontal scrolling list.
HorizontalHoverCardSwitcher	A helper class for showing a hover card view below a `HorizontalGridView`.
HostException	Exceptions that happen on calls to the host.
HostInfo	Container class for information about the host the app is connected to.
HostValidator	Validates that the calling package is authorized to connect to a `CarAppService`.
HostValidator.Builder	Builder of `HostValidator`.
HtmlCompat	Backwards compatible version of `Html`.

I

IconCompat	Helper for accessing features in `Icon`.
ICUCompat
IdentityCredential	Class used to read data from a previously provisioned credential.
IdentityCredentialException	Base class for all Identity Credential exceptions.
IdentityCredentialStore	An interface to a secure store for user identity documents.
IdentityCredentialStoreCapabilities	A class that supports querying the capabilities of a `IdentityCredentialStore` as implemented in secure hardware or in software (backed by Android Keystore).
IdRes	Denotes that an integer parameter, field or method return value is expected to be an id resource reference (e.g.
Ignore	Ignores the marked element from Room's processing logic.
ImageAnalysis	A use case providing CPU accessible images for an app to perform image analysis on.
ImageAnalysis.Analyzer	Interface for analyzing images.
ImageAnalysis.Builder	Builder for a `ImageAnalysis`.
ImageCapture	A use case for taking a picture.
ImageCapture.Builder	Builder for an `ImageCapture`.
ImageCapture.Metadata	Holder class for metadata that will be saved with captured images.
ImageCapture.OnImageCapturedCallback	Callback for when an image capture has completed.
ImageCapture.OnImageSavedCallback	Listener containing callbacks for image file I/O events.
ImageCapture.OutputFileOptions	Options for saving newly captured image.
ImageCapture.OutputFileOptions.Builder	Builder class for `ImageCapture.OutputFileOptions`.
ImageCapture.OutputFileResults	Info about the saved image file.
ImageCaptureException	An exception thrown to indicate an error has occurred during image capture or while saving the captured image.
ImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
ImageCardView	A subclass of `BaseCardView` with an `ImageView` as its main region.
ImageInfo	Metadata for an image.
ImageProxy	An image proxy which has a similar interface as `Image`.
ImageProxy.PlaneProxy	A plane proxy which has an analogous interface as `Image.Plane`.
ImageProxyTransformFactory	Factory for extracting transform info from `ImageProxy`.
ImageViewCompat	Helper for accessing features in `ImageView`.
ImageViewStyle	Specifies the style for an `ImageView`.
ImageViewStyle.Builder	Builder for the `ImageViewStyle`.
ImeKeyMonitor	Interface for an EditText subclass that can delegate calls to onKeyPreIme up to a registered listener.
ImeKeyMonitor.ImeKeyListener	Listener interface for key events intercepted pre-IME by edit text objects.
Index	Declares an index on an Entity.
InitializationException	`InitializationException` is thrown when a failure occurs during an initialization process.
InitializationProvider	The `ContentProvider` which discovers `Initializer`s in an application and initializes them before `Application.onCreate()`.
Initializer<T>	`Initializer`s can be used to initialize libraries during app startup, without the need to use additional `ContentProvider`s.
InlineSuggestionUi	The entry point for building the content or style for the V1 inline suggestion UI.
InlineSuggestionUi.Content	Content for the V1 inline suggestion UI.
InlineSuggestionUi.Content.Builder	Builder for the `InlineSuggestionUi.Content`.
InlineSuggestionUi.Style	Style for the V1 inline suggestion UI.
InlineSuggestionUi.Style.Builder	Builder for the `InlineSuggestionUi.Style`.
InputCallback	A listener for handling text input completion event.
InputCallbackDelegate	A host-side delegate for sending `InputCallback` events to the car app.
InputConnectionCompat	Helper for accessing features in `InputConnection` introduced after API level 13 in a backwards compatible fashion.
InputConnectionCompat.OnCommitContentListener	Listener for commitContent method call, in a backwards compatible fashion.
InputContentInfoCompat	Helper for accessing features in InputContentInfo introduced after API level 13 in a backwards compatible fashion.
InputDeviceCompat	Helper class for accessing values in `InputDevice`.
InputMerger	An abstract class that allows the user to define how to merge a list of inputs to a `ListenableWorker`.
InputMergerFactory	A factory object that creates `InputMerger` instances.
InputSignInMethod	A `SignInTemplate.SignInMethod` that presents an input box for the user to enter their credentials.
InputSignInMethod.Builder	A builder of `InputSignInMethod`.
Insert	Marks a method in a `Dao` annotated class as an insert method.
Insets	An Insets instance holds four integer offsets which describe changes to the four edges of a Rectangle.
InspectableProperty	This @interface is deprecated. Replaced by the `androidx.resourceinpsection` package.
InspectableProperty.EnumEntry	One entry in an enumeration packed into a primitive {int}.
InspectableProperty.FlagEntry	One flag value of many that may be packed into a primitive {int}.
InspectableProperty.ValueType	The type of value packed into a primitive {int}.
InstantTaskExecutorRule	A JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which executes each task synchronously.
IntArrayEvaluator	This evaluator can be used to perform type interpolation between `int[]` values.
IntDef	Denotes that the annotated element of integer type, represents a logical type and that its value should be one of the explicitly named constants.
IntegerRes	Denotes that an integer parameter, field or method return value is expected to be an integer resource reference (e.g.
IntentCompat	Helper for accessing features in `Intent`.
IntentSenderRequest	A request for a `ActivityResultContracts.StartIntentSenderForResult` Activity Contract.
IntentSenderRequest.Builder	A builder for constructing `IntentSenderRequest` instances.
Interpolator	An interpolator defines the rate of change of an animation.
InterpolatorRes	Denotes that an integer parameter, field or method return value is expected to be an interpolator resource reference (e.g.
IntEvaluator	This evaluator can be used to perform type interpolation between `int` values.
IntProperty<T>	An implementation of `Property` to be used specifically with fields of type `int`.
IntRange	Denotes that the annotated element should be an int or long in the given range Example: `@IntRange(from=0,to=255) public int getAlpha() { ...`
InvalidationTracker	InvalidationTracker keeps a list of tables modified by queries and notifies its callbacks about these tables.
InvalidationTracker.Observer	An observer that can listen for changes in the database.
InvalidReaderSignatureException	Thrown if the reader signature is invalid, or it doesn't contain a certificate chain, or if the signature failed to validate.
InvalidRequestMessageException	Thrown if message with the request doesn't satisfy the requirements documented in `IdentityCredential.getEntries(byte[], Map, byte[])`.
Item	Interface implemented by models that can be added to an `ItemList`.
ItemAlignmentFacet	Optional facet provided by `RecyclerView.Adapter` or `RecyclerView.ViewHolder` for use in `HorizontalGridView` and `VerticalGridView`.
ItemAlignmentFacet.ItemAlignmentDef	Definition of an alignment position under a view.
ItemBridgeAdapter	Bridge from `Presenter` to `RecyclerView.Adapter`.
ItemBridgeAdapter.AdapterListener	Interface for listening to ViewHolder operations.
ItemBridgeAdapter.ViewHolder	ViewHolder for the ItemBridgeAdapter.
ItemBridgeAdapter.Wrapper	Interface for wrapping a view created by a Presenter into another view.
ItemBridgeAdapterShadowOverlayWrapper	A wrapper class working with `ItemBridgeAdapter` to wrap item view in a `ShadowOverlayContainer`.
ItemDetailsLookup<K>	The Selection library calls `getItemDetails(MotionEvent)` when it needs access to information about the area and/or `ItemDetailsLookup.ItemDetails` under a `MotionEvent`.
ItemDetailsLookup.ItemDetails<K>	An ItemDetails implementation provides the selection library with access to information about a specific RecyclerView item.
ItemKeyProvider<K>	Provides selection library access to stable selection keys identifying items presented by a `RecyclerView` instance.
ItemKeyProvider.Scope
ItemList	Represents a list of `Item` instances.
ItemList.Builder	A builder of `ItemList`.
ItemList.OnItemVisibilityChangedListener	A listener for handling item visibility changes.
ItemList.OnSelectedListener	A listener for handling selection events for lists with selectable items.
ItemTouchHelper	This is a utility class to add swipe to dismiss and drag & drop support to RecyclerView.
ItemTouchHelper.Callback	This class is the contract between ItemTouchHelper and your application.
ItemTouchHelper.SimpleCallback	A simple wrapper to the default Callback which you can construct with drag and swipe directions and this class will handle the flag callbacks.
ItemTouchHelper.ViewDropHandler	An interface which can be implemented by LayoutManager for better integration with `ItemTouchHelper`.
ItemTouchUIUtil	Utility class for `ItemTouchHelper` which handles item transformations for different API versions.

J

JavaScriptReplyProxy	This class represents the JavaScript object injected by `WebViewCompat#addWebMessageListener`.
JobIntentService	This class is deprecated. This class has been deprecated in favor of the Android Jetpack Junction	Declares a junction to be used for joining a relationship.

K

Keep	Denotes that the annotated element should not be removed when the code is minified at build time.
KeyedAppState	A keyed app state to be sent to an EMM (enterprise mobility management), with the intention that it is displayed to the management organization.
KeyedAppState.KeyedAppStateBuilder	The builder for `KeyedAppState`.
KeyedAppStatesCallback	Interface used to listen for the result when using `KeyedAppStatesReporter.setStates(Collection, KeyedAppStatesCallback)` or `KeyedAppStatesReporter.setStatesImmediate(Collection, KeyedAppStatesCallback)`.
KeyedAppStatesReporter	A reporter of keyed app states to enable communication between an app and an EMM (enterprise mobility management).
KeyedAppStatesService	Base service for receiving app states in Device Owner and Profile Owner apps.
Keyframe<T>	This class holds a time/value pair for an animation.

L

Lane	Configuration of a single lane of a road at a particular point in the navigation.
Lane.Builder	A builder of `Lane`.
LaneDirection	Defines the possible directions a driver can go when using a particular lane at a particular step in the navigation.
LayoutElementBuilders	Builders for composable layout elements that can be combined together to create renderable UI layouts.
LayoutElementBuilders.Arc	An arc container.
LayoutElementBuilders.Arc.Builder	Builder for `LayoutElementBuilders.Arc`.
LayoutElementBuilders.ArcAdapter	A container that allows a standard `LayoutElementBuilders.LayoutElement` to be added to an `LayoutElementBuilders.Arc`.
LayoutElementBuilders.ArcAdapter.Builder	Builder for `LayoutElementBuilders.ArcAdapter`.
LayoutElementBuilders.ArcAnchorTypeProp	An extensible `ArcAnchorType` property.
LayoutElementBuilders.ArcAnchorTypeProp.Builder	Builder for `LayoutElementBuilders.ArcAnchorTypeProp`
LayoutElementBuilders.ArcLayoutElement	Interface defining the root of all elements that can be used in an `LayoutElementBuilders.Arc`.
LayoutElementBuilders.ArcLayoutElement.Builder	Builder to create `LayoutElementBuilders.ArcLayoutElement` objects.
LayoutElementBuilders.ArcLine	A line that can be used in an `LayoutElementBuilders.Arc` and renders as a round progress bar.
LayoutElementBuilders.ArcLine.Builder	Builder for `LayoutElementBuilders.ArcLine`.
LayoutElementBuilders.ArcSpacer	A simple spacer used to provide padding between adjacent elements in an `LayoutElementBuilders.Arc`.
LayoutElementBuilders.ArcSpacer.Builder	Builder for `LayoutElementBuilders.ArcSpacer`.
LayoutElementBuilders.ArcText	A text element that can be used in an `LayoutElementBuilders.Arc`.
LayoutElementBuilders.ArcText.Builder	Builder for `LayoutElementBuilders.ArcText`.
LayoutElementBuilders.Box	A container which stacks all of its children on top of one another.
LayoutElementBuilders.Box.Builder	Builder for `LayoutElementBuilders.Box`.
LayoutElementBuilders.ColorFilter	Filtering parameters used for images.
LayoutElementBuilders.ColorFilter.Builder	Builder for `LayoutElementBuilders.ColorFilter`
LayoutElementBuilders.Column	A column of elements.
LayoutElementBuilders.Column.Builder	Builder for `LayoutElementBuilders.Column`.
LayoutElementBuilders.ContentScaleModeProp	An extensible `ContentScaleMode` property.
LayoutElementBuilders.ContentScaleModeProp.Builder	Builder for `LayoutElementBuilders.ContentScaleModeProp`
LayoutElementBuilders.FontStyle	The styling of a font (e.g.
LayoutElementBuilders.FontStyle.Builder	Builder for `LayoutElementBuilders.FontStyle`
LayoutElementBuilders.FontStyles	Font styles, currently set up to match Wear's font styling.
LayoutElementBuilders.FontVariantProp	An extensible `FontVariant` property.
LayoutElementBuilders.FontVariantProp.Builder	Builder for `LayoutElementBuilders.FontVariantProp`
LayoutElementBuilders.FontWeightProp	An extensible `FontWeight` property.
LayoutElementBuilders.FontWeightProp.Builder	Builder for `LayoutElementBuilders.FontWeightProp`
LayoutElementBuilders.HorizontalAlignmentProp	An extensible `HorizontalAlignment` property.
LayoutElementBuilders.HorizontalAlignmentProp.Builder	Builder for `LayoutElementBuilders.HorizontalAlignmentProp`
LayoutElementBuilders.Image	An image.
LayoutElementBuilders.Image.Builder	Builder for `LayoutElementBuilders.Image`.
LayoutElementBuilders.Layout	A complete layout.
LayoutElementBuilders.Layout.Builder	Builder for `LayoutElementBuilders.Layout`
LayoutElementBuilders.LayoutElement	Interface defining the root of all layout elements.
LayoutElementBuilders.LayoutElement.Builder	Builder to create `LayoutElementBuilders.LayoutElement` objects.
LayoutElementBuilders.Row	A row of elements.
LayoutElementBuilders.Row.Builder	Builder for `LayoutElementBuilders.Row`.
LayoutElementBuilders.Spacer	A simple spacer, typically used to provide padding between adjacent elements.
LayoutElementBuilders.Spacer.Builder	Builder for `LayoutElementBuilders.Spacer`.
LayoutElementBuilders.Span	Interface defining a single `LayoutElementBuilders.Span`.
LayoutElementBuilders.Span.Builder	Builder to create `LayoutElementBuilders.Span` objects.
LayoutElementBuilders.SpanImage	An image which can be added to a `LayoutElementBuilders.Span`.
LayoutElementBuilders.SpanImage.Builder	Builder for `LayoutElementBuilders.SpanImage`.
LayoutElementBuilders.Spannable	A container of `LayoutElementBuilders.Span` elements.
LayoutElementBuilders.Spannable.Builder	Builder for `LayoutElementBuilders.Spannable`.
LayoutElementBuilders.SpanText	A portion of text which can be added to a `LayoutElementBuilders.Span`.
LayoutElementBuilders.SpanText.Builder	Builder for `LayoutElementBuilders.SpanText`.
LayoutElementBuilders.SpanVerticalAlignmentProp	An extensible `SpanVerticalAlignment` property.
LayoutElementBuilders.SpanVerticalAlignmentProp.Builder	Builder for `LayoutElementBuilders.SpanVerticalAlignmentProp`
LayoutElementBuilders.Text	A text string.
LayoutElementBuilders.Text.Builder	Builder for `LayoutElementBuilders.Text`.
LayoutElementBuilders.TextAlignmentProp	An extensible `TextAlignment` property.
LayoutElementBuilders.TextAlignmentProp.Builder	Builder for `LayoutElementBuilders.TextAlignmentProp`
LayoutElementBuilders.TextOverflowProp	An extensible `TextOverflow` property.
LayoutElementBuilders.TextOverflowProp.Builder	Builder for `LayoutElementBuilders.TextOverflowProp`
LayoutElementBuilders.VerticalAlignmentProp	An extensible `VerticalAlignment` property.
LayoutElementBuilders.VerticalAlignmentProp.Builder	Builder for `LayoutElementBuilders.VerticalAlignmentProp`
LayoutInflaterCompat	Helper for accessing features in `LayoutInflater`.
LayoutInflaterFactory	This interface is deprecated. Use `LayoutInflater.Factory2` directly.
LayoutRes	Denotes that an integer parameter, field or method return value is expected to be a layout resource reference (e.g.
LeanbackEditTextPreferenceDialogFragmentCompat	Implemented a dialog to input text.
LeanbackListPreferenceDialogFragment	This class is deprecated. Use `LeanbackListPreferenceDialogFragmentCompat`
LeanbackListPreferenceDialogFragment.AdapterMulti	This class is deprecated. Ue LeanbackListPreferenceDialogFragmentCompat.
LeanbackListPreferenceDialogFragment.AdapterSingle	This class is deprecated. Use LeanbackListPreferenceDialogFragmentCompat.
LeanbackListPreferenceDialogFragment.ViewHolder	This class is deprecated. Ue LeanbackListPreferenceDialogFragmentCompat.
LeanbackListPreferenceDialogFragment.ViewHolder.OnItemClickListener
LeanbackListPreferenceDialogFragmentCompat	Implemented a dialog to show `ListPreference` or `MultiSelectListPreference`.
LeanbackListPreferenceDialogFragmentCompat.ViewHolder	ViewHolder for each Item in the List.
LeanbackPreferenceDialogFragment	This class is deprecated. Use `LeanbackPreferenceDialogFragmentCompat`
LeanbackPreferenceDialogFragmentCompat	A fragment that shows `DialogPreference`, for example `ListPreference` or `MultiSelectListPreference`.
LeanbackPreferenceFragment	This class is deprecated. Use `LeanbackPreferenceFragmentCompat`
LeanbackPreferenceFragmentCompat	This fragment provides a fully decorated leanback-style preference fragment, including a list background and header.
LeanbackSettingsFragment	This class is deprecated. Use `LeanbackSettingsFragmentCompat`
LeanbackSettingsFragmentCompat	This fragment provides a container for displaying a `LeanbackPreferenceFragmentCompat` The following sample code shows a simple leanback preference fragment that is populated from a resource.
LeanbackTabLayout	`TabLayout` with some specific customizations related to focus navigation for TV to be used as top navigation bar.
LeanbackViewPager	A viewpager with touch and key event handling disabled by default.
LegacySurfacePackage	A serializable class containing all the data required to render and interact with a surface from an off-process renderer.
LibraryResult	Result class to be used with `ListenableFuture` for asynchronous calls between `MediaLibraryService.MediaLibrarySession` and `MediaBrowser`.
Lifecycle	Defines an object that has an Android Lifecycle.
Lifecycle.Event
Lifecycle.State	Lifecycle states.
LifecycleCameraController	A controller that provides most of the CameraX features.
LifecycleEventObserver	Class that can receive any lifecycle change and dispatch it to the receiver.
LifecycleObserver	Marks a class as a LifecycleObserver.
LifecycleOwner	A class that has an Android lifecycle.
LifecycleRegistry	An implementation of `Lifecycle` that can handle multiple observers.
LifecycleRegistryOwner	This interface is deprecated. Use `androidx.appcompat.app.AppCompatActivity` which extends `LifecycleOwner`, so there are no use cases for this class.
LifecycleService	A Service that is also a `LifecycleOwner`.
LinearInterpolator	An interpolator where the rate of change is constant
LinearLayoutCompat	A Layout that arranges its children in a single column or a single row.
LinearLayoutCompat.LayoutParams	Per-child layout information associated with ViewLinearLayout.
LinearLayoutManager	A `RecyclerView.LayoutManager` implementation which provides similar functionality to `ListView`.
LinearLayoutManager.LayoutChunkResult
LinearOutSlowInInterpolator	Interpolator corresponding to `R.interpolator.linear_out_slow_in`.
LinearSmoothScroller	`RecyclerView.SmoothScroller` implementation which uses a `LinearInterpolator` until the target position becomes a child of the RecyclerView and then uses a `DecelerateInterpolator` to slowly approach to target position.
LinearSnapHelper	Implementation of the `SnapHelper` supporting snapping in either vertical or horizontal orientation.
LinkifyCompat	LinkifyCompat brings in `Linkify` improvements for URLs and email addresses to older API levels.
ListAdapter<T, VH extends RecyclerView.ViewHolder>	`RecyclerView.Adapter` base class for presenting List data in a `RecyclerView`, including computing diffs between Lists on a background thread.
ListBuilder	Builder for constructing slices composed of rows of content.
ListBuilder.HeaderBuilder	Builder to construct a header row.
ListBuilder.InputRangeBuilder	Builder to construct a input range row.
ListBuilder.RangeBuilder	Builder to construct a range row which can be added to a `ListBuilder`.
ListBuilder.RatingBuilder	Builder to construct a input star rating.
ListBuilder.RowBuilder	Builder to construct a row.
ListenableWorker	A class that can perform work asynchronously in `WorkManager`.
ListenableWorker.Result	The result of a `ListenableWorker`'s computation.
ListFragment	Static library support version of the framework's `ListFragment`.
ListPopupWindow	Static library support version of the framework's `ListPopupWindow`.
ListPopupWindowCompat	Helper for accessing features in `ListPopupWindow`.
ListPreference	A `Preference` that displays a list of entries as a dialog.
ListPreference.SimpleSummaryProvider	A simple `Preference.SummaryProvider` implementation for a `ListPreference`.
ListPreferenceDialogFragment	This class is deprecated. Use `ListPreferenceDialogFragmentCompat` instead
ListPreferenceDialogFragmentCompat
ListRow	A `Row` composed of a optional `HeaderItem`, and an `ObjectAdapter` describing the items in the list.
ListRowHoverCardView	ListRowHoverCardView contains a title and description.
ListRowPresenter	ListRowPresenter renders `ListRow` using a `HorizontalGridView` hosted in a `ListRowView`.
ListRowPresenter.SelectItemViewHolderTask	A task on the ListRowPresenter.ViewHolder that can select an item by position in the HorizontalGridView and perform an optional item task on it.
ListRowPresenter.ViewHolder	ViewHolder for the ListRowPresenter.
ListRowView	ListRowView is a `ViewGroup` which always contains a `HorizontalGridView`, and may optionally include a hover card.
ListTemplate	A template representing a list of items.
ListTemplate.Builder	A builder of `ListTemplate`.
ListUpdateCallback	An interface that can receive Update operations that are applied to a list.
ListViewAutoScrollHelper	An implementation of `AutoScrollHelper` that knows how to scroll through a `ListView`.
ListViewCompat	Helper for accessing features in `ListView`
LiveData<T>	LiveData is a data holder class that can be observed within a given lifecycle.
LiveDataReactiveStreams	Adapts `LiveData` input and output to the ReactiveStreams spec.
Loader<D>	Static library support version of the framework's `Loader`.
Loader.ForceLoadContentObserver	An implementation of a ContentObserver that takes care of connecting it to the Loader to have the loader re-load its data when the observer is told it has changed.
Loader.OnLoadCanceledListener<D>	Interface that is implemented to discover when a Loader has been canceled before it finished loading its data.
Loader.OnLoadCompleteListener<D>	Interface that is implemented to discover when a Loader has finished loading its data.
LoaderManager	Static library support version of the framework's `LoaderManager`.
LoaderManager.LoaderCallbacks<D>	Callback interface for a client to interact with the manager.
LoaderQueryRunner	A `ContentPager.QueryRunner` that executes queries using a `LoaderManager`.
LocalBroadcastManager	This class is deprecated. LocalBroadcastManager is an application-wide event bus and embraces layer violations in your app: any component may listen events from any other. You can replace usage of `LocalBroadcastManager` with other implementation of observable pattern, depending on your usecase suitable options may be `LiveData` or reactive streams.
LocaleListCompat	Helper for accessing features in `LocaleList`.
LocalStorage	An AppSearch storage system which stores data locally in the app's storage space using a bundled version of the search native library.
LocalStorage.SearchContext	Contains information about how to create the search session.
LocalStorage.SearchContext.Builder	Builder for `LocalStorage.SearchContext` objects.
LocationCompat	Helper for accessing features in `Location`.
LocationManagerCompat	Helper for accessing features in `LocationManager`.
LocusIdCompat	An identifier for an unique state (locus) in the application.
LongDef	Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants.
LongMessageTemplate	A template for displaying a long text, which could be several paragraphs long, with associated actions.
LongMessageTemplate.Builder	A builder of `LongMessageTemplate`.
LongSparseArray<E>	SparseArray mapping longs to Objects.
LruCache<K, V>	Static library version of `android.util.LruCache`.

M

MailTo	MailTo URI parser.
MainThread	Denotes that the annotated method should only be called on the main thread.
Manager	A manager that extends the services provided by `CarContext`.
Maneuver	Information about a maneuver that the driver will be required to perform.
Maneuver.Builder	A builder of `Maneuver`.
MarginLayoutParamsCompat	Helper for accessing API features in `MarginLayoutParams` in a backwards compatible way.
MarginPageTransformer	Adds space between pages via the `ViewPager2.PageTransformer` API.
MasterKey	Wrapper for a master key used in the library.
MasterKey.Builder	Builder for generating a `MasterKey`.
MasterKey.KeyScheme	Algorithm/Cipher choices used for the master key.
MasterKeys	This class is deprecated. Use `MasterKey.Builder` to work with master keys.
MathUtils	A utility class providing functions useful for common mathematical operations.
MbmsHelper	Helper methods for working with the `android.telephony.mbms` cell-broadcast APIs.
MediaBrowser	Browses media content offered by a `MediaLibraryService`.
MediaBrowser.BrowserCallback	Callback to listen events from `MediaLibraryService`.
MediaBrowser.Builder	Builder for `MediaBrowser`.
MediaBrowserCompat	Browses media content offered by a `MediaBrowserServiceCompat`.
MediaBrowserCompat.ConnectionCallback	Callbacks for connection related events.
MediaBrowserCompat.CustomActionCallback	Callback for receiving the result of `MediaBrowserCompat.sendCustomAction(String, Bundle, MediaBrowserCompat.CustomActionCallback)`.
MediaBrowserCompat.ItemCallback	Callback for receiving the result of `MediaBrowserCompat.getItem(String, MediaBrowserCompat.ItemCallback)`.
MediaBrowserCompat.MediaItem	A class with information on a single media item for use in browsing/searching media.
MediaBrowserCompat.SearchCallback	Callback for receiving the result of `MediaBrowserCompat.search(String, Bundle, MediaBrowserCompat.SearchCallback)`.
MediaBrowserCompat.SubscriptionCallback	Callbacks for subscription related events.
MediaBrowserServiceCompat	Base class for media browse services.
MediaBrowserServiceCompat.BrowserRoot	Contains information that the browser service needs to send to the client when first connected.
MediaBrowserServiceCompat.Result<T>	Completion handler for asynchronous callback methods in `MediaBrowserServiceCompat`.
MediaButtonReceiver	A media button receiver receives and helps translate hardware media playback buttons, such as those found on wired and wireless headsets, into the appropriate callbacks in your app.
MediaConstants	Media constants for sharing constants between media provider and consumer apps
MediaConstants	Media constants for sharing constants between media provider and consumer apps
MediaControlIntent	Constants for media control intents.
MediaController	Allows an app to interact with an active `MediaSession` or a `MediaSessionService` which would provide `MediaSession`.
MediaController.Builder	Builder for `MediaController`.
MediaController.ControllerCallback	Interface for listening to change in activeness of the `MediaSession`.
MediaController.PlaybackInfo	Holds information about the way volume is handled for this session.
MediaControllerAdapter	A helper class for implementing a adapter layer for `MediaControllerCompat`.
MediaControllerCompat	Allows an app to interact with an ongoing media session.
MediaControllerCompat.Callback	Callback for receiving updates on from the session.
MediaControllerCompat.PlaybackInfo	Holds information about the way volume is handled for this session.
MediaControllerCompat.TransportControls	Interface for controlling media playback on a session.
MediaControllerGlue	This class is deprecated. Use `MediaControllerAdapter` with `PlaybackTransportControlGlue` or `PlaybackBannerControlGlue`.
MediaControlView	A View that contains the controls for `MediaController` or `SessionPlayer`.
MediaControlView.OnFullScreenListener	Interface definition of a callback to be invoked to inform the fullscreen mode is changed.
MediaDescriptionCompat	A simple set of metadata for a media item suitable for display.
MediaDescriptionCompat.Builder	Builder for `MediaDescriptionCompat` objects.
MediaItem	A class with information on a single media item with the metadata information.
MediaItem.Builder	Builder for `MediaItem`.
MediaItemMetadata	Constants for specifying metadata about a media item as a `Bundle`.
MediaItemStatus	Describes the playback status of a media item.
MediaItemStatus.Builder	Builder for `media item status objects`.
MediaLibraryService	Base class for media library services, which is the service containing `MediaLibraryService.MediaLibrarySession`.
MediaLibraryService.LibraryParams	Contains information that the library service needs to send to the client.
MediaLibraryService.LibraryParams.Builder	Builds a `MediaLibraryService.LibraryParams`.
MediaLibraryService.MediaLibrarySession	Session for the `MediaLibraryService`.
MediaLibraryService.MediaLibrarySession.Builder	Builder for `MediaLibraryService.MediaLibrarySession`.
MediaLibraryService.MediaLibrarySession.MediaLibrarySessionCallback	Callback for the `MediaLibraryService.MediaLibrarySession`.
MediaMetadata	Contains metadata about an item, such as the title, artist, etc.
MediaMetadata.Builder	Use to build MediaMetadatax objects.
MediaMetadataCompat	Contains metadata about an item, such as the title, artist, etc.
MediaMetadataCompat.Builder	Use to build MediaMetadata objects.
MediaPlayer	A media player which plays `MediaItem`s.
MediaPlayer.PlayerCallback	Interface definition for callbacks to be invoked when the player has the corresponding events.
MediaPlayer.TrackInfo	Class for the player to return each audio/video/subtitle track's metadata.
MediaPlayerAdapter	This implementation extends the `PlayerAdapter` with a `MediaPlayer`.
MediaRouteActionProvider	The media route action provider displays a `media route button` in the application's `ActionBar` to allow the user to select routes and to control the currently selected route.
MediaRouteButton	The media route button allows the user to select routes and to control the currently selected route.
MediaRouteChooserDialog	This class implements the route chooser dialog for `MediaRouter`.
MediaRouteChooserDialogFragment	Media route chooser dialog fragment.
MediaRouteControllerDialog	This class implements the route controller dialog for `MediaRouter`.
MediaRouteControllerDialogFragment	Media route controller dialog fragment.
MediaRouteDescriptor	Describes the properties of a route.
MediaRouteDescriptor.Builder	Builder for `media route descriptors`.
MediaRouteDialogFactory	The media route dialog factory is responsible for creating the media route chooser and controller dialogs as needed.
MediaRouteDiscoveryFragment	Media route discovery fragment.
MediaRouteDiscoveryRequest	Describes the kinds of routes that the media router would like to discover and whether to perform active scanning.
MediaRouteProvider	Media route providers are used to publish additional media routes for use within an application.
MediaRouteProvider.Callback	Callback which is invoked when route information becomes available or changes.
MediaRouteProvider.DynamicGroupRouteController	Provides control over a dynamic group route.
MediaRouteProvider.DynamicGroupRouteController.DynamicRouteDescriptor	Contains a route, its selection state and its capabilities.
MediaRouteProvider.DynamicGroupRouteController.DynamicRouteDescriptor.Builder	Builder for `MediaRouteProvider.DynamicGroupRouteController.DynamicRouteDescriptor`
MediaRouteProvider.ProviderMetadata	Describes properties of the route provider's implementation.
MediaRouteProvider.RouteController	Provides control over a particular route.
MediaRouteProviderDescriptor	Describes the state of a media route provider and the routes that it publishes.
MediaRouteProviderDescriptor.Builder	Builder for `MediaRouteProviderDescriptor`.
MediaRouteProviderService	Base class for media route provider services.
MediaRouter	MediaRouter allows applications to control the routing of media channels and streams from the current device to external speakers and destination devices.
MediaRouter.Callback	Interface for receiving events about media routing changes.
MediaRouter.ControlRequestCallback	Callback which is invoked with the result of a media control request.
MediaRouter.OnPrepareTransferListener	Listener for receiving events when the selected route is about to be changed.
MediaRouter.ProviderInfo	Provides information about a media route provider.
MediaRouter.RouteInfo	Provides information about a media route.
MediaRouterParams	MediaRouterParams are used in `MediaRouter` to denote routing functionality and UI types.
MediaRouterParams.Builder	Builder class for `MediaRouterParams`.
MediaRouteSelector	Describes the capabilities of routes that applications would like to discover and use.
MediaRouteSelector.Builder	Builder for `media route selectors`.
MediaSession	Allows a media app to expose its transport controls and playback information in a process to other processes including the Android framework and other apps.
MediaSession.Builder	Builder for `MediaSession`.
MediaSession.CommandButton	Button for a `SessionCommand` that will be shown by the controller.
MediaSession.CommandButton.Builder	Builder for `MediaSession.CommandButton`.
MediaSession.ControllerInfo	Information of a controller.
MediaSession.SessionCallback	Callback to be called for all incoming commands from `MediaController`s.
MediaSessionCompat	Allows interaction with media controllers, volume keys, media buttons, and transport controls.
MediaSessionCompat.Callback	Receives transport controls, media buttons, and commands from controllers and the system.
MediaSessionCompat.OnActiveChangeListener
MediaSessionCompat.QueueItem	A single item that is part of the play queue.
MediaSessionCompat.Token	Represents an ongoing session.
MediaSessionManager	Provides support for interacting with `media sessions` that applications have published to express their ongoing media playback state.
MediaSessionManager	Provides support for interacting with media sessions that applications have published in order to express their ongoing media playback state.
MediaSessionManager.RemoteUserInfo	Information of a remote user of `MediaSessionCompat` or `MediaBrowserServiceCompat`.
MediaSessionService	Base class for media session services, which is the service containing `MediaSession`.
MediaSessionService.MediaNotification	Returned by `MediaSessionService.onUpdateNotification(MediaSession)` for making session service foreground service to keep playback running in the background.
MediaSessionStatus	Describes the playback status of a media session.
MediaSessionStatus.Builder	Builder for `media session status objects`.
MediaTimestamp	An immutable object that represents the linear correlation between the media time and the system time.
MediatorLiveData<T>	`LiveData` subclass which may observe other `LiveData` objects and react on `OnChanged` events from them.
MediaTransferReceiver	A `BroadcastReceiver` class for enabling Media transfer feature.
MenuCompat	Helper for accessing features in `Menu`.
MenuItemCompat	Helper for accessing features in `MenuItem`.
MenuItemCompat.OnActionExpandListener	This interface is deprecated. Use `MenuItem.OnActionExpandListener` directly.
MenuRes	Denotes that an integer parameter, field or method return value is expected to be a menu resource reference.
MessageCompat	Helper for accessing features in `Message`.
MessageDecryptionException	Thrown when failing to decrypt a message from the reader device.
MessageInfo	Represents a message that can be shown in the `NavigationTemplate`.
MessageInfo.Builder	A builder of `MessageInfo`.
MessageTemplate	A template for displaying a message and associated actions.
MessageTemplate.Builder	A builder of `MessageTemplate`.
Metadata	Holder class for metadata that should be saved alongside captured video.
Metadata	A metadata class used for attaching additional properties to models.
Metadata.Builder	The builder for `Metadata`.
Metadata.Builder	A builder for `Metadata`.
MetadataConstants	Constants for android wear apps which are related to manifest meta-data.
MetadataRepo	Class to hold the emoji metadata required to process and draw emojis.
MetadataRepo	Class to hold the emoji metadata required to process and draw emojis.
MeteringPoint	A `MeteringPoint` is used to specify a region which can then be converted to sensor coordinate system for focus and metering purpose.
MeteringPointFactory	A factory to create a `MeteringPoint`.
Migration	Base class for a database migration.
MigrationTestHelper	A class that can be used in your Instrumentation tests that can create the database in an older schema.
Migrator	A migrator class to translate `GenericDocument` from different version of `AppSearchSchema` Make non-backwards-compatible changes will delete all stored documents in old schema.
Mileage	Information about car mileage.
Mileage.Builder	A builder of `Mileage`.
MimeTypeFilter	Provides utility methods for matching MIME type filters used in ContentProvider.
Model	Information about the androidx.car.app.hardware model such as name, year and manufacturer.
Model.Builder	A builder of `Model`.
ModifiersBuilders	Builders for modifiers for composable layout elements.
ModifiersBuilders.ArcModifiers	`ModifiersBuilders.Modifiers` that can be used with ArcLayoutElements.
ModifiersBuilders.ArcModifiers.Builder	Builder for `ModifiersBuilders.ArcModifiers`
ModifiersBuilders.Background	A modifier to apply a background to an element.
ModifiersBuilders.Background.Builder	Builder for `ModifiersBuilders.Background`
ModifiersBuilders.Border	A modifier to apply a border around an element.
ModifiersBuilders.Border.Builder	Builder for `ModifiersBuilders.Border`
ModifiersBuilders.Clickable	A modifier for an element which can have associated Actions for click events.
ModifiersBuilders.Clickable.Builder	Builder for `ModifiersBuilders.Clickable`
ModifiersBuilders.Corner	The corner of a `LayoutElementBuilders.Box` element.
ModifiersBuilders.Corner.Builder	Builder for `ModifiersBuilders.Corner`
ModifiersBuilders.Modifiers	`ModifiersBuilders.Modifiers` for an element.
ModifiersBuilders.Modifiers.Builder	Builder for `ModifiersBuilders.Modifiers`
ModifiersBuilders.Padding	A modifier to apply padding around an element.
ModifiersBuilders.Padding.Builder	Builder for `ModifiersBuilders.Padding`
ModifiersBuilders.Semantics	A modifier for an element which has accessibility semantics associated with it.
ModifiersBuilders.Semantics.Builder	Builder for `ModifiersBuilders.Semantics`
ModifiersBuilders.SpanModifiers	`ModifiersBuilders.Modifiers` that can be used with `LayoutElementBuilders.Span` elements.
ModifiersBuilders.SpanModifiers.Builder	Builder for `ModifiersBuilders.SpanModifiers`
MotionEventCompat	Helper for accessing features in `MotionEvent`.
MultiActionsProvider	An interface implemented by the user if they wish to provide actions for a media item row to be displayed by an `AbstractMediaItemPresenter`.
MultiActionsProvider.MultiAction	MultiAction represents an action that can have multiple states.
MultiSelectListPreference	A `Preference` that displays a list of entries as a dialog.
MultiSelectListPreferenceDialogFragment	This class is deprecated. Use `MultiSelectListPreferenceDialogFragmentCompat` instead
MultiSelectListPreferenceDialogFragmentCompat
MutableLiveData<T>	`LiveData` which publicly exposes `setValue(T)` and `postValue(T)` method.
MutableSelection<K>	Subclass of `Selection` exposing public support for mutating the underlying selection data.

N

NavigationManager	Manager for communicating navigation related events with the host.
NavigationManagerCallback	Callback for events from the `NavigationManager`.
NavigationRes	Denotes that an integer parameter, field or method return value is expected to be a navigation resource reference (e.g.
NavigationTemplate	A template for showing navigation information.
NavigationTemplate.Builder	A builder of `NavigationTemplate`.
NavigationTemplate.NavigationInfo	Represents navigation information such as routing instructions or navigation-related messages.
NavUtils	NavUtils provides helper functionality for applications implementing recommended Android UI navigation patterns.
NestedScrollingChild	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChild2	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChild3	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChildHelper	Helper class for implementing nested scrolling child views compatible with Android platform versions earlier than Android 5.0 Lollipop (API 21).
NestedScrollingParent	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParent2	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParent3	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParentHelper	Helper class for implementing nested scrolling parent views compatible with Android platform versions earlier than Android 5.0 Lollipop (API 21).
NestedScrollView	NestedScrollView is just like `ScrollView`, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android.
NestedScrollView.OnScrollChangeListener	Interface definition for a callback to be invoked when the scroll X or Y positions of a view change.
NetworkType	An enumeration of various network types that can be used as `Constraints` for work.
NightImageCaptureExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
NightPreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
NoAuthenticationKeyAvailableException	Thrown if no dynamic authentication keys are available.
NonNull	Denotes that a parameter, field or method return value can never be null.
NotificationChannelCompat	A representation of settings that apply to a collection of similarly themed notifications.
NotificationChannelCompat.Builder	Builder class for `NotificationChannelCompat` objects.
NotificationChannelGroupCompat	A grouping of related notification channels.
NotificationChannelGroupCompat.Builder	Builder class for `NotificationChannelGroupCompat` objects.
NotificationCompat	Helper for accessing features in `Notification`.
NotificationCompat	Class containing media specfic `styles` that you can use with `NotificationCompat.Builder.setStyle(NotificationCompat.Style)`.
NotificationCompat.Action	Structure to encapsulate a named action that can be shown as part of this notification.
NotificationCompat.Action.Builder	Builder class for `NotificationCompat.Action` objects.
NotificationCompat.Action.Extender	Extender interface for use with `NotificationCompat.Builder.extend(NotificationCompat.Extender)`.
NotificationCompat.Action.SemanticAction	Provides meaning to an `NotificationCompat.Action` that hints at what the associated `PendingIntent` will do.
NotificationCompat.Action.WearableExtender	Wearable extender for notification actions.
NotificationCompat.BigPictureStyle	Helper class for generating large-format notifications that include a large image attachment.
NotificationCompat.BigTextStyle	Helper class for generating large-format notifications that include a lot of text.
NotificationCompat.BubbleMetadata	Encapsulates the information needed to display a notification as a bubble.
NotificationCompat.BubbleMetadata.Builder	Builder to construct a `NotificationCompat.BubbleMetadata` object.
NotificationCompat.Builder	Builder class for `NotificationCompat` objects.
NotificationCompat.CarExtender	Helper class to add Android Auto extensions to notifications.
NotificationCompat.CarExtender.UnreadConversation	This class is deprecated. `NotificationCompat.CarExtender.UnreadConversation` is no longer supported. Use `NotificationCompat.MessagingStyle` instead.
NotificationCompat.CarExtender.UnreadConversation.Builder	Builder class for `NotificationCompat.CarExtender.UnreadConversation` objects.
NotificationCompat.DecoratedCustomViewStyle	Notification style for custom views that are decorated by the system.
NotificationCompat.DecoratedMediaCustomViewStyle	Notification style for media custom views that are decorated by the system.
NotificationCompat.Extender	Extender interface for use with `NotificationCompat.Builder.extend(NotificationCompat.Extender)`.
NotificationCompat.InboxStyle	Helper class for generating large-format notifications that include a list of (up to 5) strings.
NotificationCompat.MediaStyle	Notification style for media playback notifications.
NotificationCompat.MessagingStyle	Helper class for generating large-format notifications that include multiple back-and-forth messages of varying types between any number of people.
NotificationCompat.MessagingStyle.Message
NotificationCompat.Style	An object that can apply a rich notification style to a `Notification.CarExtender.Builder` object.
NotificationCompat.WearableExtender	Helper class to add wearable extensions to notifications.
NotificationCompatExtras	Well-known extras used by `NotificationCompat` for backwards compatibility.
NotificationCompatSideChannelService	Abstract service to receive side channel notifications sent from `NotificationManagerCompat`.
NotificationManagerCompat	Compatibility library for NotificationManager with fallbacks for older platforms.
Nullable	Denotes that a parameter, field or method return value can be null.

O

ObjectAdapter	Base class adapter to be used in leanback activities.
ObjectAdapter.DataObserver	A DataObserver can be notified when an ObjectAdapter's underlying data changes.
ObjectAnimator	This subclass of `ValueAnimator` provides support for animating properties on target objects.
ObjectsCompat	This class consists of static utility methods for operating on objects.
Observer<T>	A simple callback that can receive from `LiveData`.
Observer<T>	A simple callback that can receive from ObservableWatchData.
OnActionClickedListener	Interface for receiving notification when an `Action` is clicked.
OnApplyWindowInsetsListener	Listener for applying window insets on a view in a custom way.
OnBackPressedCallback	Class for handling `OnBackPressedDispatcher.onBackPressed()` callbacks without strongly coupling that implementation to a subclass of `ComponentActivity`.
OnBackPressedDispatcher	Dispatcher that can be used to register `OnBackPressedCallback` instances for handling the `ComponentActivity.onBackPressed()` callback via composition.
OnBackPressedDispatcherOwner	A class that has an `OnBackPressedDispatcher` that allows you to register a `OnBackPressedCallback` for handling the system back button.
OnboardingFragment	This class is deprecated. use `OnboardingSupportFragment`
OnboardingSupportFragment	An OnboardingSupportFragment provides a common and simple way to build onboarding screen for applications.
OnCarDataAvailableListener<T>	A listener for data being returned about from the car hardware.
OnCheckedChangeDelegate	A host-side delegate for sending `Toggle.OnCheckedChangeListener` events to the car app.
OnChildLaidOutListener	Interface for receiving notification when a child of this ViewGroup has been laid out.
OnChildSelectedListener	This interface is deprecated. Use `OnChildViewHolderSelectedListener`
OnChildViewHolderSelectedListener	Interface for receiving notification when a child of this ViewGroup has been selected.
OnClickDelegate	A host-side interface for reporting click to clients.
OnClickListener	A listener of click events.
OnConflictStrategy	Set of conflict handling strategies for various `Dao` methods.
OnContextAvailableListener	Listener for receiving a callback at the first moment a `Context` is made available to the `ContextAware` class.
OnContextClickListener	Register an OnContextClickListener to be notified when a context click occurs.
OnDoneCallback	A host-side interface for handling success and failure scenarios on calls to the client.
OnDragInitiatedListener	Register an OnDragInitiatedListener to be notified when user intent to perform drag and drop operations on an item or items has been detected.
OneShotPreDrawListener	An OnPreDrawListener that will remove itself after one OnPreDraw call.
OneTimeWorkRequest	A `WorkRequest` for non-repeating work.
OneTimeWorkRequest.Builder	Builder for `OneTimeWorkRequest`s.
OngoingActivity	Main class to access the Ongoing Activities API.
OngoingActivity.Builder	Builder used to build an `OngoingActivity` Note that many fields take a default value from the provided notification if not explicitly set.
OnItemActivatedListener<K>	Register an OnItemActivatedListener to be notified when an item is activated (tapped or double clicked).
OnItemViewClickedListener	Interface for receiving notification when a item view holder is clicked.
OnItemViewSelectedListener	Interface for receiving notification when a row or item becomes selected.
OnItemVisibilityChangedDelegate	A host-side delegate for sending `ItemList.OnItemVisibilityChangedListener` events to the car app.
OnLifecycleEvent
OnReceiveContentListener	Listener for apps to implement handling for insertion of content.
OnReceiveContentViewBehavior	Interface for widgets to implement default behavior for receiving content.
OnRequestPermissionsListener	A listener with the results from a permissions request.
OnScreenResultListener	A listener to provide the result set by a `Screen`.
OnSelectedDelegate	A host-side delegate for sending `ItemList.OnSelectedListener` events to the car app.
OnVideoSavedCallback	Listener containing callbacks for video file I/O events.
Openable	A layout that has two states: opened and closed.
Operation	An object that provides information about the execution of an asynchronous command being performed by `WorkManager`.
Operation.State	The lifecycle state of an `Operation`.
Operation.State.FAILURE	This represents an `Operation` which has failed.
Operation.State.IN_PROGRESS	This represents an `Operation` which is in progress.
Operation.State.SUCCESS	This represents an `Operation` which is successful.
OperationCanceledException	An exception type that is thrown when an operation in progress is canceled.
OperationMonitor	OperationMonitor provides a mechanism to coordinate application logic with ongoing user selection activities (such as active band selection and active gesture selection).
OperationMonitor.OnChangeListener	Listen to changes in operation status.
OrientationHelper	Helper class for LayoutManagers to abstract measurements depending on the View's orientation.
OutOfQuotaPolicy	An enumeration of policies that help determine out of quota behavior for expedited jobs.
OutputFileOptions	Options for saving newly captured video.
OutputFileOptions.Builder	Builder class for `OutputFileOptions`.
OutputFileResults	Info about the saved video file.
OutputTransform	Represents the transform applied to the output of a `UseCase`.
OvershootInterpolator	An interpolator where the change flings forward and overshoots the last value then comes back.
OverwritingInputMerger	An `InputMerger` that attempts to add all keys from all inputs to the output.

P

PackageIdentifier	This class represents a uniquely identifiable package.
PackageInfoCompat	Helper for accessing features in `PackageInfo`.
PagerAdapter	Base class providing the adapter to populate pages inside of a `ViewPager`.
PageRow	Used to represent content spanning full page.
PagerSnapHelper	Implementation of the `SnapHelper` supporting pager style snapping in either vertical or horizontal orientation.
PagerTabStrip	PagerTabStrip is an interactive indicator of the current, next, and previous pages of a `ViewPager`.
PagerTitleStrip	PagerTitleStrip is a non-interactive indicator of the current, next, and previous pages of a `ViewPager`.
PaintCompat	Helper for accessing features in `Paint`.
Pair<F, S>	Container to ease passing around a tuple of two objects.
Palette	A helper class to extract prominent colors from an image.
Palette.Builder	Builder class for generating `Palette` instances.
Palette.Filter	A Filter provides a mechanism for exercising fine-grained control over which colors are valid within a resulting `Palette`.
Palette.PaletteAsyncListener	Listener to be used with `Palette.generateAsync(Bitmap, PaletteAsyncListener)` or `Palette.generateAsync(Bitmap, int, PaletteAsyncListener)`
Palette.Swatch	Represents a color swatch generated from an image's palette.
Pane	Represents a list of rows used for displaying informational content and a set of `Action`s that users can perform based on such content.
Pane.Builder	A builder of `Pane`.
PaneTemplate	A template that displays a `Pane`.
PaneTemplate.Builder	A builder of `PaneTemplate`.
PanModeDelegate	A host-side delegate for sending `PanModeListener` events to the car app.
PanModeListener	A listener for handling the pan mode changes.
Parallax<PropertyT extends Property>	Parallax tracks a list of dynamic `Property`s typically representing foreground UI element positions on screen.
Parallax.FloatProperty	FloatProperty provide access to an index based integer type property inside `Parallax`.
Parallax.IntProperty	IntProperty provide access to an index based integer type property inside `Parallax`.
Parallax.PropertyMarkerValue<PropertyT>	Class holding a fixed value for a Property in `Parallax`.
ParallaxEffect	ParallaxEffect class drives changes in `ParallaxTarget` in response to changes in variables defined in `Parallax`.
ParallaxTarget	ParallaxTarget is responsible for updating the target through the `update(float)` method or the `directUpdate(Number)` method when `isDirectMapping()` is true.
ParallaxTarget.DirectPropertyTarget<T, V extends Number>	DirectPropertyTarget is to support direct mapping into either Integer Property or Float Property.
ParallaxTarget.PropertyValuesHolderTarget	PropertyValuesHolderTarget is an implementation of `ParallaxTarget` that uses `PropertyValuesHolder` to update the target object.
ParcelableCompat	This class is deprecated. Use `Parcelable.ClassLoaderCreator` directly.
ParcelableCompatCreatorCallbacks<T>	This interface is deprecated. Use `Parcelable.ClassLoaderCreator` directly.
ParcelableVolumeInfo	Convenience class for passing information about the audio configuration of a `MediaSessionCompat`.
ParcelCompat	Helper for accessing features in `Parcel`.
ParcelUtils	Utilities for managing `VersionedParcelable`s.
ParkedOnlyOnClickListener	An `OnClickListener` that wraps another one and executes its `onClick()` method only when the car is parked.
ParseException	Thrown when parsing a mailto URI has failed.
PathInterpolator	An interpolator that can traverse a Path that extends from `Point` `(0, 0)` to `(1, 1)`.
PathInterpolatorCompat	Helper for creating path-based `Interpolator` instances.
PathMotion	This base class can be extended to provide motion along a Path to Transitions.
PathSegment	A line segment that represents an approximate fraction of a `Path` after flattening.
PathUtils	A set of path-related utility methods.
PatternPathMotion	A PathMotion that takes a Path pattern and applies it to the separation between two points.
PatternsCompat	Commonly used regular expression patterns.
PercentageRating	A class for rating expressed as a percentage.
PercentFrameLayout	This class is deprecated. consider using ConstraintLayout and associated layouts instead. The following shows how to replicate the functionality of percentage layouts with a ConstraintLayout. The Guidelines are used to define each percentage break point, and then a Button view is stretched to fill the gap: <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/left_guideline" app:layout_constraintGuide_percent=".15" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/right_guideline" app:layout_constraintGuide_percent=".85" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/top_guideline" app:layout_constraintGuide_percent=".15" android:orientation="horizontal"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/bottom_guideline" app:layout_constraintGuide_percent=".85" android:orientation="horizontal"/> <Button android:text="Button" android:layout_width="0dp" android:layout_height="0dp" android:id="@+id/button" app:layout_constraintLeft_toLeftOf="@+id/left_guideline" app:layout_constraintRight_toRightOf="@+id/right_guideline" app:layout_constraintTop_toTopOf="@+id/top_guideline" app:layout_constraintBottom_toBottomOf="@+id/bottom_guideline" /> </androidx.constraintlayout.widget.ConstraintLayout>
PercentFrameLayout.LayoutParams	This class is deprecated. this class is deprecated along with its parent class.
PercentLayoutHelper	This class is deprecated. consider using ConstraintLayout and associated layouts instead. The following shows how to replicate the functionality of percentage layouts with a ConstraintLayout. The Guidelines are used to define each percentage break point, and then a Button view is stretched to fill the gap: <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/left_guideline" app:layout_constraintGuide_percent=".15" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/right_guideline" app:layout_constraintGuide_percent=".85" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/top_guideline" app:layout_constraintGuide_percent=".15" android:orientation="horizontal"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/bottom_guideline" app:layout_constraintGuide_percent=".85" android:orientation="horizontal"/> <Button android:text="Button" android:layout_width="0dp" android:layout_height="0dp" android:id="@+id/button" app:layout_constraintLeft_toLeftOf="@+id/left_guideline" app:layout_constraintRight_toRightOf="@+id/right_guideline" app:layout_constraintTop_toTopOf="@+id/top_guideline" app:layout_constraintBottom_toBottomOf="@+id/bottom_guideline" /> </androidx.constraintlayout.widget.ConstraintLayout>
PercentLayoutHelper.PercentLayoutInfo	This class is deprecated. use ConstraintLayout and Guidelines for layout support.
PercentLayoutHelper.PercentLayoutParams	This interface is deprecated. this class is deprecated along with its parent class.
PercentRelativeLayout	This class is deprecated. consider using ConstraintLayout and associated layouts instead. The following shows how to replicate the functionality of percentage layouts with a ConstraintLayout. The Guidelines are used to define each percentage break point, and then a Button view is stretched to fill the gap: <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/left_guideline" app:layout_constraintGuide_percent=".15" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/right_guideline" app:layout_constraintGuide_percent=".85" android:orientation="vertical"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/top_guideline" app:layout_constraintGuide_percent=".15" android:orientation="horizontal"/> <androidx.constraintlayout.widget.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/bottom_guideline" app:layout_constraintGuide_percent=".85" android:orientation="horizontal"/> <Button android:text="Button" android:layout_width="0dp" android:layout_height="0dp" android:id="@+id/button" app:layout_constraintLeft_toLeftOf="@+id/left_guideline" app:layout_constraintRight_toRightOf="@+id/right_guideline" app:layout_constraintTop_toTopOf="@+id/top_guideline" app:layout_constraintBottom_toBottomOf="@+id/bottom_guideline" /> </androidx.constraintlayout.widget.ConstraintLayout>
PercentRelativeLayout.LayoutParams	This class is deprecated. this class is deprecated along with its parent class.
PeriodicWorkRequest	A `WorkRequest` for repeating work.
PeriodicWorkRequest.Builder	Builder for `PeriodicWorkRequest`s.
PermissionChecker	This class provides permission check APIs that verify both the permission and the associated app op for this permission if such is defined.
PermissionInfoCompat	Helper for accessing features in `PermissionInfo`.
Person	Provides an immutable reference to an entity that appears repeatedly on different surfaces of the platform.
Person.Builder	Builder for the immutable `Person` class.
PersonalizationData	An object that holds personalization data.
PersonalizationData.Builder	A builder for `PersonalizationData`.
Picker	Picker is a widget showing multiple customized `PickerColumn`s.
Picker.PickerValueListener	Listener for `Picker` value changes.
PickerColumn	Picker column class used by `Picker`, defines a contiguous value ranges and associated labels.
PinPicker	`Picker` subclass for allowing the user to enter a numerical PIN.
PinSignInMethod	A `SignInTemplate.SignInMethod` that presents a PIN or activation code that the user can use to sign-in.
Place	Represents a geographical location and additional information on how to display it.
Place.Builder	A builder of `Place`.
PlaceListMapTemplate	A template that displays a map along with a list of places.
PlaceListMapTemplate.Builder	A builder of `PlaceListMapTemplate`.
PlaceListNavigationTemplate	A template that supports showing a list of places alongside a custom drawn map.
PlaceListNavigationTemplate.Builder	A builder of `PlaceListNavigationTemplate`.
PlaceMarker	Describes how a place is to be displayed on a map.
PlaceMarker.Builder	A builder of `PlaceMarker`.
PlaybackBannerControlGlue<T extends PlayerAdapter>	A helper class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`.
PlaybackBaseControlGlue<T extends PlayerAdapter>	A base abstract class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`.
PlaybackControlGlue	A helper class for managing a `PlaybackControlsRow` and `PlaybackGlueHost` that implements a recommended approach to handling standard playback control actions such as play/pause, fast forward/rewind at progressive speed levels, and skip to next/previous.
PlaybackControlsRow	A `Row` of playback controls to be displayed by a `PlaybackControlsRowPresenter`.
PlaybackControlsRow.ClosedCaptioningAction	An action for displaying a CC (Closed Captioning) icon.
PlaybackControlsRow.FastForwardAction	An action displaying an icon for fast forward.
PlaybackControlsRow.HighQualityAction	An action for displaying a HQ (High Quality) icon.
PlaybackControlsRow.MoreActions	An action displaying an icon for "more actions".
PlaybackControlsRow.MultiAction	Base class for an action comprised of a series of icons.
PlaybackControlsRow.OnPlaybackProgressCallback	Listener for progress or duration change.
PlaybackControlsRow.PictureInPictureAction	An action displaying an icon for picture-in-picture.
PlaybackControlsRow.PlayPauseAction	An action displaying icons for play and pause.
PlaybackControlsRow.RepeatAction	An action for displaying three repeat states: none, one, or all.
PlaybackControlsRow.RewindAction	An action displaying an icon for rewind.
PlaybackControlsRow.ShuffleAction	An action for displaying a shuffle icon.
PlaybackControlsRow.SkipNextAction	An action displaying an icon for skip next.
PlaybackControlsRow.SkipPreviousAction	An action displaying an icon for skip previous.
PlaybackControlsRow.ThumbsAction	A base class for displaying a thumbs action.
PlaybackControlsRow.ThumbsDownAction	An action displaying an icon for thumbs down.
PlaybackControlsRow.ThumbsUpAction	An action displaying an icon for thumbs up.
PlaybackControlsRowPresenter	A PlaybackControlsRowPresenter renders a `PlaybackControlsRow` to display a series of playback control buttons.
PlaybackControlsRowPresenter.ViewHolder	A ViewHolder for the PlaybackControlsRow.
PlaybackFragment	This class is deprecated. use `PlaybackSupportFragment`
PlaybackFragmentGlueHost	This class is deprecated. use `PlaybackSupportFragmentGlueHost`
PlaybackGlue	Base class for abstraction of media play/pause feature.
PlaybackGlue.PlayerCallback	Interface to allow clients to take action once the video is ready to play and start stop.
PlaybackGlueHost	This class represents the UI (e.g.
PlaybackGlueHost.HostCallback	Callbacks triggered by the host(e.g.
PlaybackGlueHost.PlayerCallback	Optional Client that implemented by PlaybackGlueHost to respond to player event.
PlaybackParams	Structure for common playback params.
PlaybackParams.Builder	The builder class that makes it easy to chain setters to create a `PlaybackParams` object.
PlaybackRowPresenter	Subclass of `RowPresenter` that can define the desired behavior when the view reappears.
PlaybackRowPresenter.ViewHolder	This container is used for trapping click events and passing them to the playback controls.
PlaybackSeekDataProvider	Class to be implemented by app to provide seeking data and thumbnails to UI.
PlaybackSeekDataProvider.ResultCallback	Client to receive result for `PlaybackSeekDataProvider.getThumbnail(int, ResultCallback)`.
PlaybackSeekUi	Interface to be implemented by UI component to support seeking.
PlaybackSeekUi.Client	Client (e.g.
PlaybackStateCompat	Playback state for a `MediaSessionCompat`.
PlaybackStateCompat.Builder	Builder for `PlaybackStateCompat` objects.
PlaybackStateCompat.CustomAction	`CustomActions` can be used to extend the capabilities of the standard transport controls by exposing app specific actions to `Controllers`.
PlaybackStateCompat.CustomAction.Builder	Builder for `PlaybackStateCompat.CustomAction` objects.
PlaybackSupportFragment	A fragment for displaying playback controls and related content.
PlaybackSupportFragmentGlueHost	`PlaybackGlueHost` implementation the interaction between this class and `PlaybackSupportFragment`.
PlaybackTransportControlGlue<T extends PlayerAdapter>	A helper class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`, it supports standard playback control actions play/pause, and skip next/previous.
PlaybackTransportRowPresenter	A PlaybackTransportRowPresenter renders a `PlaybackControlsRow` to display a series of playback control buttons.
PlaybackTransportRowPresenter.ViewHolder	A ViewHolder for the PlaybackControlsRow supporting seek UI.
PlayerAdapter	Base class that wraps underlying media player.
PlayerAdapter.Callback	Client for client of PlayerAdapter.
PluralsRes	Denotes that an integer parameter, field or method return value is expected to be a plurals resource reference.
PointerIconCompat	Helper for accessing features in `PointerIcon` in a backwards compatible fashion.
PointFEvaluator	This evaluator can be used to perform type interpolation between `PointF` values.
Pools	Helper class for creating pools of objects.
Pools.Pool<T>	Interface for managing a pool of objects.
Pools.SimplePool<T>	Simple (non-synchronized) pool of objects.
Pools.SynchronizedPool<T>	Synchronized) pool of objects.
PopupMenu	Static library support version of the framework's `PopupMenu`.
PopupMenu.OnDismissListener	Callback interface used to notify the application that the menu has closed.
PopupMenu.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
PopupMenuCompat	Helper for accessing features in `PopupMenu`.
PopupWindowCompat	Helper for accessing features in `PopupWindow`.
PostMessageService	A service to receive postMessage related communication from a Custom Tabs provider.
PostMessageServiceConnection	A `ServiceConnection` for Custom Tabs providers to use while connecting to a `PostMessageService` on the client side.
PrecomputedTextCompat	A text which has the character metrics data.
PrecomputedTextCompat.Params	The information required for building `PrecomputedTextCompat`.
PrecomputedTextCompat.Params.Builder	A builder for creating `PrecomputedTextCompat.Params`.
Predicate<T>	Compat version of `Predicate`
Preference	The basic building block that represents an individual setting displayed to a user in the preference hierarchy.
Preference.BaseSavedState	A base class for managing the instance state of a `Preference`.
Preference.OnPreferenceChangeListener	Interface definition for a callback to be invoked when the value of this `Preference` has been changed by the user and is about to be set and/or persisted.
Preference.OnPreferenceClickListener	Interface definition for a callback to be invoked when a `Preference` is clicked.
Preference.SummaryProvider<T extends Preference>	Interface definition for a callback to be invoked when the summary of this `Preference` is requested (typically when this preference is added to the hierarchy or its value is updated).
PreferenceCategory	A container that is used to group similar `Preference`s.
PreferenceDataStore	A data store interface to be implemented and provided to the `Preference` framework.
PreferenceDialogFragment	This class is deprecated. Use `PreferenceDialogFragmentCompat` instead
PreferenceDialogFragmentCompat	Abstract base class which presents a dialog associated with a `DialogPreference`.
PreferenceFragment	This class is deprecated. Use `PreferenceFragmentCompat` instead
PreferenceFragment.OnPreferenceDisplayDialogCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to display a dialog.
PreferenceFragment.OnPreferenceStartFragmentCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a specified fragment.
PreferenceFragment.OnPreferenceStartScreenCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a new screen of preferences.
PreferenceFragmentCompat	A PreferenceFragmentCompat is the entry point to using the Preference library.
PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to display a dialog.
PreferenceFragmentCompat.OnPreferenceStartFragmentCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a specified fragment.
PreferenceFragmentCompat.OnPreferenceStartScreenCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a new screen of preferences.
PreferenceGroup	A container for multiple `Preference`s.
PreferenceGroup.PreferencePositionCallback	Interface for PreferenceGroup adapters to implement so that `PreferenceFragmentCompat.scrollToPreference(String)` and `PreferenceFragmentCompat.scrollToPreference(Preference)` can determine the correct scroll position to request.
PreferenceManager	Used to help create `Preference` hierarchies from activities or XML.
PreferenceManager.OnDisplayPreferenceDialogListener	Interface definition for a class that will be called when a `Preference` requests to display a dialog.
PreferenceManager.OnNavigateToScreenListener	Interface definition for a class that will be called when a `PreferenceScreen` requests navigation.
PreferenceManager.OnPreferenceTreeClickListener	Interface definition for a callback to be invoked when a `Preference` in the hierarchy rooted at this `PreferenceScreen` is clicked.
PreferenceManager.PreferenceComparisonCallback	Callback class to be used by the `RecyclerView.Adapter` associated with the `PreferenceScreen`, used to determine when two `Preference` objects are semantically and visually the same.
PreferenceManager.SimplePreferenceComparisonCallback	A basic implementation of `PreferenceManager.PreferenceComparisonCallback` suitable for use with the default `Preference` classes.
PreferenceScreen	A top-level container that represents a settings screen.
PreferenceViewHolder	A `RecyclerView.ViewHolder` class which caches views associated with the default `Preference` layouts.
Presenter	A Presenter is used to generate `View`s and bind Objects to them on demand.
Presenter.ViewHolder	ViewHolder can be subclassed and used to cache any view accessors needed to improve binding performance (for example, results of findViewById) without needing to subclass a View.
Presenter.ViewHolderTask	Base class to perform a task on Presenter.ViewHolder.
PresenterSelector	A PresenterSelector is used to obtain a `Presenter` for a given Object.
PresenterSwitcher	An abstract helper class that switches a view in its parent view using a `PresenterSelector`.
Preview	A use case that provides a camera preview stream for displaying on-screen.
Preview.Builder	Builder for a `Preview`.
Preview.SurfaceProvider	A interface implemented by the application to provide a `Surface` for `Preview`.
PreviewChannel	Since API 26, all TV apps may create preview channels and publish them to the home screen.
PreviewChannel.Builder	This builder makes it easy to create a PreviewChannel object by allowing you to chain setters.
PreviewChannelHelper	From a user's perspective, the TV home screen has two types of channels: the single Live Channels row versus the App preview Channels.
PreviewExtender	This class is deprecated. Use `ExtensionsManager.isExtensionAvailable(CameraProvider, CameraSelector, int)` to check whether extension function can support with the given `CameraSelector`. Use `ExtensionsManager.getExtensionEnabledCameraSelector(CameraProvider, CameraSelector, int)` to get a `CameraSelector` for the specific extension mode, then use it to bind the use cases to a lifecycle owner.
PreviewProgram	A convenience class to access `TvContractCompat.PreviewPrograms` entries in the system content provider.
PreviewProgram.Builder	This Builder class simplifies the creation of a `PreviewProgram` object.
PreviewView	Custom View that displays the camera feed for CameraX's `Preview` use case.
PreviewView.ImplementationMode	The implementation mode of a `PreviewView`.
PreviewView.ScaleType	Options for scaling the preview vis-à-vis its container `PreviewView`.
PreviewView.StreamState	Definitions for the preview stream state.
PrimaryKey	Marks a field in an `Entity` as the primary key.
PrintHelper	Helper for printing bitmaps.
PrintHelper.OnPrintFinishCallback	Callback for observing when a print operation is completed.
ProcessCameraProvider	A singleton which can be used to bind the lifecycle of cameras to any `LifecycleOwner` within an application's process.
ProcessCompat	Helper for accessing features in `Process`.
ProcessLifecycleInitializer	Initializes `ProcessLifecycleOwner` using `androidx.startup`.
ProcessLifecycleOwner	Class that provides lifecycle for the whole application process.
ProfileInstaller	Install ahead of time tracing profiles to configure ART to precompile bundled libraries.
ProfileInstaller.DiagnosticsCallback	An object which can be passed to the ProfileInstaller which will receive information during the installation process which can be used for logging and telemetry.
ProfileInstallerInitializer	Startup library initializer that installs an AOT profile several seconds after launch.
ProfileInstallerInitializer.Result	Empty result class for ProfileInstaller.
ProfileInstallReceiver	The `BroadcastReceiver` which forces a synchronous installation of the baseline profile.
Program	A convenience class to access `TvContractCompat.Programs` entries in the system content provider.
Program.Builder	This Builder class simplifies the creation of a `Program` object.
ProgressBarManager	Manager for showing/hiding progress bar widget.
ProgressUpdater	Updates progress for a `ListenableWorker`.
PropertyValuesHolder	This class holds information about a property and the values that that property should take on during an animation.
ProvidedAutoMigrationSpec	Marks a class as an auto migration spec that will be provided to Room at runtime.
ProvidedTypeConverter	Marks a class as a type converter that will be provided to Room at runtime.
ProviderSignInMethod	A `SignInTemplate.SignInMethod` that allows the user to initiate sign-in with a authentication provider.
ProxyConfig	Config for `ProxyController.setProxyOverride(ProxyConfig, Executor, Runnable)`.
ProxyConfig.Builder	ProxyConfig builder.
ProxyConfig.ProxyRule	Class that holds a scheme filter and a proxy URL.
ProxyController	Manages setting and clearing a process-specific override for the Android system-wide proxy settings that govern network requests made by `WebView`.
PutDocumentsRequest	Encapsulates a request to index documents into an `AppSearchSession` database.
PutDocumentsRequest.Builder	Builder for `PutDocumentsRequest` objects.
Px	Denotes that an integer parameter, field or method return value is expected to represent a pixel dimension.

Q

Query	Encapsulates information related to calling `ContentResolver.query(Uri, String[], Bundle, CancellationSignal)`, including the logic determining the best query method to call.
Query	Marks a method in a `Dao` annotated class as a query method.

R

Rating	An interface to encapsulate rating information used as content metadata.
RatingCompat	A class to encapsulate rating information used as content metadata.
RawQuery	Marks a method in a `Dao` annotated class as a raw query method where you can pass the query as a `SupportSQLiteQuery`.
RawRes	Denotes that an integer parameter, field or method return value is expected to be a raw resource reference.
ReceivedKeyedAppState	A keyed app state received from an app.
ReceivedKeyedAppState.ReceivedKeyedAppStateBuilder	The builder for `ReceivedKeyedAppState`.
RecommendationExtender	Helper class to add content info extensions to notifications.
RectEvaluator	This evaluator can be used to perform type interpolation between `Rect` values.
RecyclerView	A flexible view for providing a limited window into a large data set.
RecyclerView.Adapter<VH extends RecyclerView.ViewHolder>	Base class for an Adapter Adapters provide a binding from an app-specific data set to views that are displayed within a `RecyclerView`.
RecyclerView.Adapter.StateRestorationPolicy	Defines how this Adapter wants to restore its state after a view reconstruction (e.g.
RecyclerView.AdapterDataObserver	Observer base class for watching changes to an `RecyclerView.Adapter`.
RecyclerView.ChildDrawingOrderCallback	A callback interface that can be used to alter the drawing order of RecyclerView children.
RecyclerView.EdgeEffectFactory	EdgeEffectFactory lets you customize the over-scroll edge effect for RecyclerViews.
RecyclerView.EdgeEffectFactory.EdgeDirection
RecyclerView.ItemAnimator	This class defines the animations that take place on items as changes are made to the adapter.
RecyclerView.ItemAnimator.AdapterChanges	The set of flags that might be passed to `RecyclerView.ItemAnimator.recordPreLayoutInformation(State, ViewHolder, int, List)`.
RecyclerView.ItemAnimator.ItemAnimatorFinishedListener	This interface is used to inform listeners when all pending or running animations in an ItemAnimator are finished.
RecyclerView.ItemAnimator.ItemHolderInfo	A simple data structure that holds information about an item's bounds.
RecyclerView.ItemDecoration	An ItemDecoration allows the application to add a special drawing and layout offset to specific item views from the adapter's data set.
RecyclerView.LayoutManager	A `LayoutManager` is responsible for measuring and positioning item views within a `RecyclerView` as well as determining the policy for when to recycle item views that are no longer visible to the user.
RecyclerView.LayoutManager.LayoutPrefetchRegistry	Interface for LayoutManagers to request items to be prefetched, based on position, with specified distance from viewport, which indicates priority.
RecyclerView.LayoutManager.Properties	Some general properties that a LayoutManager may want to use.
RecyclerView.LayoutParams	`LayoutParams` subclass for children of `RecyclerView`.
RecyclerView.OnChildAttachStateChangeListener	A Listener interface that can be attached to a RecylcerView to get notified whenever a ViewHolder is attached to or detached from RecyclerView.
RecyclerView.OnFlingListener	This class defines the behavior of fling if the developer wishes to handle it.
RecyclerView.OnItemTouchListener	An OnItemTouchListener allows the application to intercept touch events in progress at the view hierarchy level of the RecyclerView before those touch events are considered for RecyclerView's own scrolling behavior.
RecyclerView.OnScrollListener	An OnScrollListener can be added to a RecyclerView to receive messages when a scrolling event has occurred on that RecyclerView.
RecyclerView.RecycledViewPool	RecycledViewPool lets you share Views between multiple RecyclerViews.
RecyclerView.Recycler	A Recycler is responsible for managing scrapped or detached item views for reuse.
RecyclerView.RecyclerListener	A RecyclerListener can be set on a RecyclerView to receive messages whenever a view is recycled.
RecyclerView.SimpleOnItemTouchListener	An implementation of `RecyclerView.OnItemTouchListener` that has empty method bodies and default return values.
RecyclerView.SmoothScroller	Base class for smooth scrolling.
RecyclerView.SmoothScroller.Action	Holds information about a smooth scroll request by a `RecyclerView.SmoothScroller`.
RecyclerView.SmoothScroller.ScrollVectorProvider	An interface which is optionally implemented by custom `RecyclerView.LayoutManager` to provide a hint to a `RecyclerView.SmoothScroller` about the location of the target position.
RecyclerView.State	Contains useful information about the current RecyclerView state like target scroll position or view focus.
RecyclerView.ViewCacheExtension	ViewCacheExtension is a helper class to provide an additional layer of view caching that can be controlled by the developer.
RecyclerView.ViewHolder	A ViewHolder describes an item view and metadata about its place within the RecyclerView.
RecyclerViewAccessibilityDelegate	The AccessibilityDelegate used by RecyclerView.
RecyclerViewAccessibilityDelegate.ItemDelegate	The default implementation of accessibility delegate for the individual items of the RecyclerView.
RecyclerViewParallax	Implementation of `Parallax` class for `RecyclerView`.
RecyclerViewParallax.ChildPositionProperty	Subclass of `Parallax.IntProperty`.
Relation	A convenience annotation which can be used in a POJO to automatically fetch relation entities.
RemoteActionCompat	Represents a remote action that can be called from another process.
RemoteCallable	Used to tag a method as callable using `CallbackReceiver.createRemoteCallback(Context)`.
RemoteCallback	An instance of a callback to a specific class/method with a specific set of arguments.
RemoteInput	Helper for using the `RemoteInput`.
RemoteInput.Builder	Builder class for `RemoteInput` objects.
RemoteListenableWorker	Is an implementation of a `ListenableWorker` that can bind to a remote process.
RemotePlaybackClient	A helper class for playing media on remote routes using the remote playback protocol defined by `MediaControlIntent`.
RemotePlaybackClient.ActionCallback	Base callback type for remote playback requests.
RemotePlaybackClient.ItemActionCallback	Callback for remote playback requests that operate on items.
RemotePlaybackClient.OnMessageReceivedListener	A callback that will receive messages from media sessions.
RemotePlaybackClient.SessionActionCallback	Callback for remote playback requests that operate on sessions.
RemotePlaybackClient.StatusCallback	A callback that will receive media status updates.
RemoteSessionPlayer	Base interface for all remote media players that want media session and playback happens on the remote device through MediaRouter.
RemoteSessionPlayer.Callback	A callback class to receive notifications for events on the remote session player.
RemoteWorkContinuation	Provides a subset of `WorkContinuation` APIs that are available for apps that use multiple processes.
RemoteWorkerService	The `Service` which hosts an implementation of a `ListenableWorker`.
RemoteWorkManager	A subset of `WorkManager` APIs that are available for apps that use multiple processes.
RemoveByDocumentIdRequest	Encapsulates a request to remove documents by namespace and IDs from the `AppSearchSession` database.
RemoveByDocumentIdRequest.Builder	Builder for `RemoveByDocumentIdRequest` objects.
RenameColumn	Repeatable annotation declaring the renamed columns in the `AutoMigration.to()` version of an auto migration.
RenameColumn.Entries	Container annotation for the repeatable annotation `RenameColumn`.
RenameTable	Repeatable annotation declaring the renamed tables in the new version of an auto migration.
RenameTable.Entries	Container annotation for the repeatable annotation `RenameTable`.
Renderer	Renderer class responsible for rendering the inline suggestion UI.
ReportSystemUsageRequest	A request to report usage of a document owned by another app from a system UI surface.
ReportSystemUsageRequest.Builder	Builder for `ReportSystemUsageRequest` objects.
ReportUsageRequest	A request to report usage of a document.
ReportUsageRequest.Builder	Builder for `ReportUsageRequest` objects.
RequestBuilders	Builders for request messages used to fetch tiles and resources.
RequestBuilders.ResourcesRequest	Parameters passed to a `TileBuilders.Tile` provider when the renderer is requesting a specific resource version.
RequestBuilders.ResourcesRequest.Builder	Builder for `RequestBuilders.ResourcesRequest`
RequestBuilders.TileRequest	Parameters passed to a `TileBuilders.Tile` provider when the renderer is requesting a new version of the tile.
RequestBuilders.TileRequest.Builder	Builder for `RequestBuilders.TileRequest`
RequiresApi	Denotes that the annotated element should only be called on the given API level or higher.
RequiresCarApi	Defines the minimum API level required to be able to use this model, field, or method.
RequiresFeature	Denotes that the annotated element requires one or more features.
RequiresPermission	Denotes that the annotated element requires (or may require) one or more permissions.
RequiresPermission.Read	Specifies that the given permission is required for read operations.
RequiresPermission.Write	Specifies that the given permission is required for write operations.
ResolutionInfo	A `ResolutionInfo` allows the application to know the resolution information of a specific use case.
ResourceBuilders	Builders for the resources for a layout.
ResourceBuilders.AndroidImageResourceByResId	An image resource which maps to an Android drawable by resource ID.
ResourceBuilders.AndroidImageResourceByResId.Builder	Builder for `ResourceBuilders.AndroidImageResourceByResId`
ResourceBuilders.ImageResource	An image resource, which can be used by layouts.
ResourceBuilders.ImageResource.Builder	Builder for `ResourceBuilders.ImageResource`
ResourceBuilders.InlineImageResource	An image resource whose data is fully inlined, with no dependency on a system or app resource.
ResourceBuilders.InlineImageResource.Builder	Builder for `ResourceBuilders.InlineImageResource`
ResourceBuilders.Resources	The resources for a layout.
ResourceBuilders.Resources.Builder	Builder for `ResourceBuilders.Resources`
ResourceCursorAdapter	Static library support version of the framework's `ResourceCursorAdapter`.
ResourcesCompat	Helper for accessing features in `Resources`.
ResourcesCompat.FontCallback	Interface used to receive asynchronous font fetching events.
ResourcesCompat.ThemeCompat	Provides backward-compatible implementations for new `Resources.Theme` APIs.
RestrictTo	Denotes that the annotated element should only be accessed from within a specific scope (as defined by `RestrictTo.Scope`).
RestrictTo.Scope
ResultData	An object that contains the result of retrieving data from a credential.
RetainInstanceUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectRetainInstanceUsage()`.
RewriteQueriesToDropUnusedColumns	When present, `RewriteQueriesToDropUnusedColumns` annotation will cause Room to rewrite your `Query` methods such that only the columns that are used in the response are queried from the database.
RoleManagerCompat	This class contains the name and documentation for roles that might be available in the system.
Room	Utility class for Room.
RoomDatabase	Base class for all Room databases.
RoomDatabase.Builder<T extends RoomDatabase>	Builder for RoomDatabase.
RoomDatabase.Callback	Callback for `RoomDatabase`.
RoomDatabase.JournalMode	Journal modes for SQLite database.
RoomDatabase.MigrationContainer	A container to hold migrations.
RoomDatabase.PrepackagedDatabaseCallback	Callback for `RoomDatabase.Builder.createFromAsset(String)`, `RoomDatabase.Builder.createFromFile(File)` and `RoomDatabase.Builder.createFromInputStream(Callable)` This callback will be invoked after the pre-package DB is copied but before Room had a chance to open it and therefore before the `RoomDatabase.Callback` methods are invoked.
RoomDatabase.QueryCallback	Callback interface for when SQLite queries are executed.
RoomWarnings	The list of warnings that are produced by Room.
RotationReceiver	Helper class for receiving rotation updates from the `SensorManager` when the orientation of the device has changed.
RoundedBitmapDrawable	A Drawable that wraps a bitmap and can be drawn with rounded corners.
RoundedBitmapDrawableFactory	Constructs `RoundedBitmapDrawable` objects, either from Bitmaps directly, or from streams and files.
RoundedDrawable	Maintains and draws a drawable inside rounded rectangular bounds.
RoutePreviewNavigationTemplate	A template that supports showing a list of routes alongside a custom drawn map.
RoutePreviewNavigationTemplate.Builder	A builder of `RoutePreviewNavigationTemplate`.
RoutingInfo	Represents routing information that can be shown in the `NavigationTemplate` during navigation
RoutingInfo.Builder	A builder of `RoutingInfo`.
Row	Represents a row with a title, several lines of text, an optional image, and an optional action or switch.
Row	The base class for all rows.
Row.Builder	A builder of `Row`.
RowHeaderPresenter	RowHeaderPresenter provides a default presentation for `HeaderItem` using a `RowHeaderView` and optionally a TextView for description.
RowHeaderPresenter.ViewHolder	A ViewHolder for the RowHeaderPresenter.
RowHeaderView	RowHeaderView is a header text view.
RowPresenter	An abstract `Presenter` that renders an Object in RowsFragment, the object can be subclass `Row` or a generic one.
RowPresenter.ViewHolder	A ViewHolder for a `Row`.
RowsFragment	This class is deprecated. use `RowsSupportFragment`
RowsFragment.MainFragmentAdapter
RowsFragment.MainFragmentRowsAdapter	This class is deprecated. use `RowsSupportFragment`
RowsSupportFragment	An ordered set of rows of leanback widgets.
RowsSupportFragment.MainFragmentAdapter
RowsSupportFragment.MainFragmentRowsAdapter	The adapter that RowsSupportFragment implements BrowseSupportFragment.MainFragmentRowsAdapter.
RowStyleFactory	Factory to return different styles for child views of a slice.
RunnableScheduler	Can be used to schedule `Runnable`s after a delay in milliseconds.
RxDataMigration<T>	Interface for migrations to DataStore.
RxDataMigration<T>	Interface for migrations to DataStore.
RxRoom	Helper class to add RxJava2 support to Room.
RxRoom	Helper class to add RxJava3 support to Room.
RxWorker	RxJava2 interoperability Worker implementation.
RxWorker	RxJava3 interoperability Worker implementation.

S

SafeBrowsingResponseCompat	Compatibility version of `SafeBrowsingResponse`.
SavedStateHandle	A handle to saved state passed down to `ViewModel`.
SavedStateRegistry	An interface for plugging components that consumes and contributes to the saved state.
SavedStateRegistry.AutoRecreated	Subclasses of this interface will be automatically recreated if they were previously registered via {`SavedStateRegistry.runOnNextRecreation(Class)`}.
SavedStateRegistry.SavedStateProvider	This interface marks a component that contributes to saved state.
SavedStateRegistryController	An API for `SavedStateRegistryOwner` implementations to control `SavedStateRegistry`.
SavedStateRegistryOwner	A scope that owns `SavedStateRegistry`
SavedStateViewModelFactory	`ViewModelProvider.Factory` that can create ViewModels accessing and contributing to a saved state via `SavedStateHandle` received in a constructor.
ScaleGestureDetectorCompat	Helper for accessing features in `ScaleGestureDetector`.
Scene	A scene represents the collection of values that various properties in the View hierarchy will have when the scene is applied.
Screen	A Screen has a `Lifecycle` and provides the mechanism for the app to send `Template`s to display when the Screen is visible.
ScreenController	A controller that allows testing of a `Screen`.
ScreenManager	Manages the stack of `Screen`s and their respective `Lifecycle`s.
ScreenOrientation	Represents screenOrientationLock type value of a Trusted Web Activity: https://www.w3.org/TR/screen-orientation/#screenorientation-interface
ScrollerCompat	This class is deprecated. Use `OverScroller` directly.
ScrollingView	An interface that can be implemented by Views to provide scroll related APIs.
SearchBar	A search widget containing a search orb and a text entry view.
SearchBar.SearchBarListener	Interface for receiving notification of search query changes.
SearchBar.SearchBarPermissionListener	Interface that handles runtime permissions requests.
SearchCallbackDelegate	A host-side delegate for sending `SearchTemplate.SearchCallback` events to the car app.
SearchEditText	EditText widget that monitors keyboard changes.
SearchEditText.OnKeyboardDismissListener	Interface for receiving notification when the keyboard is dismissed.
SearchFragment	This class is deprecated. use `SearchSupportFragment`
SearchFragment.SearchResultProvider	Search API to be provided by the application.
SearchOrbView	A widget that draws a search affordance, represented by a round background and an icon.
SearchOrbView.Colors	A set of colors used to display the search orb.
SearchResult	This class represents one of the results obtained from an AppSearch query.
SearchResult.Builder	Builder for `SearchResult` objects.
SearchResult.MatchInfo	This class represents a match objects for any Snippets that might be present in `SearchResults` from query.
SearchResult.MatchInfo.Builder	Builder for `SearchResult.MatchInfo` objects.
SearchResult.MatchRange	Class providing the position range of matching information.
SearchResults	Encapsulates results of a search operation.
SearchSpec	This class represents the specification logic for AppSearch.
SearchSpec.Builder	Builder for `objects`.
SearchSupportFragment	A fragment to handle searches.
SearchSupportFragment.SearchResultProvider	Search API to be provided by the application.
SearchTemplate	A model that allows the user to enter text searches, and can display results in a list.
SearchTemplate.Builder	A builder of `SearchTemplate`.
SearchTemplate.SearchCallback	A listener for search updates.
SearchView	A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SearchView.OnCloseListener
SearchView.OnQueryTextListener	Callbacks for changes to the query text.
SearchView.OnSuggestionListener	Callback interface for selection events on suggestions.
SectionedItemList	Represents an `ItemList` that is contained inside a section, for internal use only.
SectionRow	Used to represent section item in HeadersFragment.
SeekableAnimatedVectorDrawable	This class animates properties of a `VectorDrawableCompat` with animations defined using `ObjectAnimator` or `AnimatorSet`.
SeekableAnimatedVectorDrawable.AnimationCallback	Abstract class for animation callback.
SeekBarPreference	Preference based on android.preference.SeekBarPreference but uses support preference as a base .
Selection<K>	Object representing a "primary" selection and a "provisional" selection.
SelectionBuilder	Builder to construct a selection which can be added to a `ListBuilder`.
SelectionPredicates	Utility class for creating SelectionPredicate instances.
SelectionTracker<K>	SelectionTracker provides support for managing a selection of items in a RecyclerView instance.
SelectionTracker.Builder<K>	Builder is the primary mechanism for create a `SelectionTracker` that can be used with your RecyclerView.
SelectionTracker.SelectionObserver<K>	Observer class providing access to information about Selection state changes.
SelectionTracker.SelectionPredicate<K>	Implement SelectionPredicate to control when items can be selected or unselected.
SerializationHelper	Class used to manage Ongoing Activity information as part of a Bundle or Notification.
ServiceCompat	Helper for accessing features in `Service`.
ServiceLifecycleDispatcher	Helper class to dispatch lifecycle events for a service.
ServiceWorkerClientCompat	Base class for clients to capture Service Worker related callbacks, see `ServiceWorkerControllerCompat` for usage example.
ServiceWorkerControllerCompat	Manages Service Workers used by WebView.
ServiceWorkerWebSettingsCompat	Manages settings state for all Service Workers.
Session	The base class for implementing a session for a car app.
SessionCommand	Defines a command that a `MediaController` can send to a `MediaSession`.
SessionCommandGroup	A set of `SessionCommand` which represents a command group.
SessionCommandGroup.Builder	Builds a `SessionCommandGroup` object.
SessionController	A controller that allows testing of a `Session`.
SessionPlayer	Base interface for all media players that want media session.
SessionPlayer.PlayerCallback	A callback class to receive notifications for events on the session player.
SessionPlayer.PlayerResult	Result class of the asynchronous APIs.
SessionPlayer.TrackInfo	Class for the player to return each audio/video/subtitle track's metadata.
SessionResult	Result class to be used with `ListenableFuture` for asynchronous calls between `MediaSession` and `MediaController`.
SessionToken	Represents an ongoing `MediaSession` or a `MediaSessionService`.
SetRetainInstanceUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectRetainInstanceUsage()`.
SetSchemaRequest	Encapsulates a request to update the schema of an `AppSearchSession` database.
SetSchemaRequest.Builder	Builder for `SetSchemaRequest` objects.
SetSchemaResponse	The response class of `AppSearchSession.setSchema(SetSchemaRequest)`
SetSchemaResponse.Builder	Builder for `SetSchemaResponse` objects.
SetSchemaResponse.MigrationFailure	The class represents a post-migrated `GenericDocument` that failed to be saved by `AppSearchSession.setSchema(SetSchemaRequest)`.
SetTargetFragmentUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectTargetFragmentUsage()`.
Settings	Provides various preferences affecting Leanback runtime behavior.
SetUserVisibleHintViolation	See #`FragmentStrictMode.Policy.Builder.detectSetUserVisibleHint()`.
ShadowOverlayContainer	Provides an SDK version-independent wrapper to support shadows, color overlays, and rounded corners.
ShadowOverlayHelper	ShadowOverlayHelper is a helper class for shadow, overlay color and rounded corner.
ShadowOverlayHelper.Builder	Builder for creating ShadowOverlayHelper.
ShadowOverlayHelper.Options	Option values for ShadowOverlayContainer.
ShareActionProvider	Provides a share action, which is suitable for an activity's app bar.
ShareActionProvider.OnShareTargetSelectedListener	Listener for the event of selecting a share target.
ShareCompat	Extra helper functionality for sharing data between activities.
ShareCompat.IntentBuilder	IntentBuilder is a helper for constructing `Intent.ACTION_SEND` and `Intent.ACTION_SEND_MULTIPLE` sharing intents and starting activities to share content.
ShareCompat.IntentReader	IntentReader is a helper for reading the data contained within a sharing (ACTION_SEND) Intent.
ShareData	Contains data to be delivered to a Web Share Target via a Trusted Web Activity.
SharedElementCallback	Listener provided in `Activity.setEnterSharedElementCallback(SharedElementCallback)` and `Activity.setExitSharedElementCallback(SharedElementCallback)` to monitor the Activity transitions.
SharedElementCallback.OnSharedElementsReadyListener	Listener to be called after `SharedElementCallback.onSharedElementsArrived(List, List, OnSharedElementsReadyListener)` when the shared elements are ready to be hidden in the source Activity and shown in the destination Activity.
SharedPreferencesCompat	This class is deprecated. This compatibility class is no longer required. Use `SharedPreferences` directly.
SharedPreferencesCompat.EditorCompat	This class is deprecated. This compatibility class is no longer required. Use `SharedPreferences.Editor` directly.
ShareTarget	Describes a Web Share Target associated with a Trusted Web Activity.
ShareTarget.FileFormField	Defines a form field for sharing files.
ShareTarget.Params	Contains parameter names to be used for the data being shared.
ShortcutInfoCompat	Helper for accessing features in `ShortcutInfo`.
ShortcutInfoCompat.Builder	Builder class for `ShortcutInfoCompat` objects.
ShortcutManagerCompat	Helper for accessing features in `ShortcutManager`.
SidePropagation	A `TransitionPropagation` that propagates based on the distance to the side and, orthogonally, the distance to epicenter.
SignInTemplate	A template that can be used to create a sign-in flow.
SignInTemplate.Builder	A builder of `SignInTemplate`.
SignInTemplate.SignInMethod	One of the possible sign in methods that can be set on a `SignInTemplate`.
SimpleArrayMap<K, V>	Base implementation of `ArrayMap` that doesn't include any standard Java container API interoperability.
SimpleCursorAdapter	Static library support version of the framework's `SimpleCursorAdapter`.
SimpleCursorAdapter.CursorToStringConverter	This class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String.
SimpleCursorAdapter.ViewBinder	This class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views.
SimpleItemAnimator	A wrapper class for ItemAnimator that records View bounds and decides whether it should run move, change, add or remove animations.
SimpleSQLiteQuery	A basic implementation of `SupportSQLiteQuery` which receives a query and its args and binds args based on the passed in Object type.
SinglePresenterSelector	A `PresenterSelector` that always returns the same `Presenter`.
Size	Denotes that the annotated element should have a given size or length.
SkipQueryVerification	Skips database verification for the annotated element.
Slice	A slice is a piece of app content and actions that can be surfaced outside of the app.
SliceAction	Class representing an action, supports tappable icons, custom toggle icons, and default toggles, as well as date and time pickers.
SliceAction	Interface for a slice action, supports tappable icons, custom toggle icons, and default toggles.
SliceConvert	Convert between `androidx.slice.Slice` and `android.app.slice.Slice`
SliceItem	A SliceItem is a single unit in the tree structure of a `Slice`.
SliceLiveData	Class with factory methods for creating LiveData that observes slices.
SliceLiveData.CachedSliceLiveData	Implementation of `LiveData` that provides controls over how cached vs live slices work.
SliceLiveData.OnErrorListener	Listener for errors when using `SliceLiveData.fromStream(Context, InputStream, OnErrorListener)`.
SliceLiveData.OnErrorListener.ErrorType
SliceManager	Class to handle interactions with `Slice`s.
SliceMetadata	Utility class to parse a `Slice` and provide access to information around its contents.
SliceProvider	A SliceProvider allows an app to provide `Slice`s to the Android OS.
SliceStructure	Class used to see if two Slices are structurally equivalent ignoring specific content such as text or icons.
SliceUtils	Utilities for dealing with slices.
SliceUtils.SerializeOptions	Holds options for how to handle SliceItems that cannot be serialized.
SliceUtils.SliceActionListener	A listener used to receive events on slices parsed with `SliceUtils.parseSlice(Context, InputStream, String, SliceActionListener)`.
SliceUtils.SliceParseException	Exception thrown during `SliceUtils.parseSlice(Context, InputStream, String, SliceActionListener)`.
SliceView	A view for displaying `Slice`s.
SliceView.OnSliceActionListener	Implement this interface to be notified of interactions with the slice displayed in this view.
SliceViewManager	Class to handle interactions with `Slice`s.
SliceViewManager.SliceCallback	Class that listens to changes in `Slice`s.
Slide	This transition tracks changes to the visibility of target views in the start and end scenes and moves views in or out from one of the edges of the scene.
SlidingPaneLayout	SlidingPaneLayout provides a horizontal, multi-pane layout for use at the top level of a UI.
SlidingPaneLayout.LayoutParams
SlidingPaneLayout.PanelSlideListener	Listener for monitoring events about sliding panes.
SlidingPaneLayout.SimplePanelSlideListener	No-op stubs for `SlidingPaneLayout.PanelSlideListener`.
SnapHelper	Class intended to support snapping for a `RecyclerView`.
SortedList<T>	A Sorted list implementation that can keep items in order and also notify for changes in the list such that it can be bound to a `RecyclerView.Adapter`.
SortedList.BatchedCallback<T2>	A callback implementation that can batch notify events dispatched by the SortedList.
SortedList.Callback<T2>	The class that controls the behavior of the `SortedList`.
SortedListAdapterCallback<T2>	A `SortedList.Callback` implementation that can bind a `SortedList` to a `RecyclerView.Adapter`.
SparseArrayCompat<E>	SparseArrays map integers to Objects.
SparseArrayObjectAdapter	An `ObjectAdapter` implemented with a `SparseArray`.
SpeechOrbView	A subclass of `SearchOrbView` that visualizes the state of an ongoing speech recognition.
SpeechRecognitionCallback	This interface is deprecated. Launching voice recognition activity is no longer supported. App should declare android.permission.RECORD_AUDIO in AndroidManifest file. See details in `SearchSupportFragment`.
Speed	Information about the current car speed.
Speed.Builder	A builder of `Speed`.
SplashScreenParamKey	The keys of the entries in the `Bundle` passed to `TrustedWebActivityIntentBuilder.setSplashScreenParams(Bundle)`.
SplashScreenVersion	These constants are the categories the providers add to the intent filter of CustomTabService implementation to declare the support of a particular version of splash screens.
SpringAnimation	SpringAnimation is an animation that is driven by a `SpringForce`.
SpringForce	Spring Force defines the characteristics of the spring being used in the animation.
SQLiteCursorCompat	Helper for accessing features in `AbstractWindowedCursor`
StableIdKeyProvider	An `ItemKeyProvider` that provides stable ids by way of cached `RecyclerView.Adapter` stable ids.
StaggeredGridLayoutManager	A LayoutManager that lays out children in a staggered grid formation.
StaggeredGridLayoutManager.LayoutParams	LayoutParams used by StaggeredGridLayoutManager.
StarRating	A class for rating expressed as the number of stars.
StateBuilders	Builders for state of a tile.
StateBuilders.State	`StateBuilders.State` information.
StateBuilders.State.Builder	Builder for `StateBuilders.State`
StatefulAdapter	`ViewPager2` adapters should implement this interface to be called during `View.onSaveInstanceState()` and `View.onRestoreInstanceState(Parcelable)`
Status	Base class to represent the status of an Ongoing Activity and render it.
Status.Builder	Helper to Build OngoingActivityStatus instances.
Status.Part	Abstract class to represent An Ongoing activity status or part of it.
Status.StopwatchPart	An Ongoing activity status (or part of it) representing a stopwatch Available since wear-ongoing:1.0.0
Status.TextPart	An Ongoing activity status (or part of it) representing a plain, static text.
Status.TimerOrStopwatchPart	Base class for `Status.TimerPart` and `Status.StopwatchPart`, defines the getters but can't be created directly, create one of those instead.
Status.TimerPart	An Ongoing activity status (or part of it) representing a timer.
Step	Represents a step that the driver should take in order to remain on the current navigation route.
Step.Builder	A builder of `Step`.
StorageInfo	The response class of `AppSearchSession#getStorageInfo`.
StorageInfo.Builder	Builder for `StorageInfo` objects.
StorageStrategy<K>	Strategy for storing keys in saved state.
StringDef	Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants.
StringRes	Denotes that an integer parameter, field or method return value is expected to be a String resource reference (e.g.
StyleableRes	Denotes that an integer parameter, field or method return value is expected to be a styleable resource reference (e.g.
StyleRes	Denotes that an integer parameter, field or method return value is expected to be a style resource reference (e.g.
SubscriptionManagerCompat	Helper for accessing features in `SubscriptionManager`.
SubtitleData	Class encapsulating subtitle data, as received through the `SessionPlayer.PlayerCallback.onSubtitleData(SessionPlayer, MediaItem, SessionPlayer.TrackInfo, SubtitleData)` interface.
SuggestionHintConstants	Contains all the officially supported Autofill inline suggestion hint constants.
Supplier<T>	Compat version of `Supplier`
SupportSQLiteDatabase	A database abstraction which removes the framework dependency and allows swapping underlying sql versions.
SupportSQLiteOpenHelper	An interface to map the behavior of `SQLiteOpenHelper`.
SupportSQLiteOpenHelper.Callback	Handles various lifecycle events for the SQLite connection, similar to `SQLiteOpenHelper`.
SupportSQLiteOpenHelper.Configuration	The configuration to create an SQLite open helper object using `SupportSQLiteOpenHelper.Factory`.
SupportSQLiteOpenHelper.Configuration.Builder	Builder class for `SupportSQLiteOpenHelper.Configuration`.
SupportSQLiteOpenHelper.Factory	Factory class to create instances of `SupportSQLiteOpenHelper` using `SupportSQLiteOpenHelper.Configuration`.
SupportSQLiteProgram	An interface to map the behavior of `SQLiteProgram`.
SupportSQLiteQuery	A query with typed bindings.
SupportSQLiteQueryBuilder	A simple query builder to create SQL SELECT queries.
SupportSQLiteStatement	An interface to map the behavior of `SQLiteStatement`.
SurfaceCallback	A callback for changes on the `SurfaceContainer` and its attributes.
SurfaceContainer	A container for the `Surface` created by the host and its associated properties.
SurfaceControlCallback	A host-side interface for reporting to an off-process renderer events affecting the `SurfaceView` it renders content on.
SurfaceHolderGlueHost	Optional interface to be implemented by any subclass of `PlaybackGlueHost` that contains a `SurfaceView`.
SurfaceOrientedMeteringPointFactory	A `MeteringPointFactory` that can create `MeteringPoint` by surface oriented x, y on an area defined by (0, 0) - (width, height).
SurfaceRequest	A completable, single-use request of a `Surface`.
SurfaceRequest.Result	Result of providing a surface to a `SurfaceRequest` via `SurfaceRequest.provideSurface(Surface, Executor, Consumer)`.
SurfaceRequest.TransformationInfo	Transformation associated the preview output.
SurfaceRequest.TransformationInfoListener	Listener that receives updates of the `SurfaceRequest.TransformationInfo` associated with the `SurfaceRequest`.
SurfaceWrapper	A class holding the information needed to render the content on a surface.
SwipeDismissFrameLayout	A layout enabling left-to-right swipe-to-dismiss, intended for use within an activity.
SwipeDismissFrameLayout.Callback	Implement this callback to act on particular stages of the dismissal.
SwipeRefreshLayout	The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.
SwipeRefreshLayout.OnChildScrollUpCallback	Classes that wish to override `SwipeRefreshLayout.canChildScrollUp()` method behavior should implement this interface.
SwipeRefreshLayout.OnRefreshListener	Classes that wish to be notified when the swipe gesture correctly triggers a refresh should implement this interface.
SwitchCompat	SwitchCompat is a complete backport of the core `Switch` widget that brings the visuals and the functionality of that widget to older versions of the platform.
SwitchPreference	A `Preference` that provides a two-state toggleable option.
SwitchPreferenceCompat	A `Preference` that provides a two-state toggleable option.
SynchronousExecutor	Is an implementation of a `Executor` which executes `Runnable`'s synchronously.

T

Target	A class which allows custom selection of colors in a `Palette`'s generation.
Target.Builder	Builder class for generating custom `Target` instances.
TargetFragmentUsageViolation	See #`FragmentStrictMode.Policy.Builder.detectTargetFragmentUsage()`.
TaskStackBuilder	Utility class for constructing synthetic back stacks for cross-task navigation on Android 3.0 and newer.
TaskStackBuilder.SupportParentable
TelephonyManagerCompat	Helper for accessing features in `TelephonyManager`.
Template	An interface used to denote a model that can act as a root for a tree of other models.
TemplateInfo	Stores information about `Template` returned from a `Screen`.
TemplateSliceBuilder	Base class of builders of various template types.
TemplateWrapper	A wrapper for mapping a `Template` with a unique ID used for implementing task flow restrictions.
TestAppAuthenticatorBuilder	Builder class that can be used to facilitate the creation of a new `AppAuthenticator` which can be configured to meet the requirements of the test.
TestAppManager	The `AppManager` that is used for testing.
TestCarContext	The `CarContext` that is used for testing.
TestCarContext.PermissionRequestInfo	A representation of a permission request including the permissions that were requested as well as the callback provided.
TestDriver	Additional functionality exposed for `WorkManager` that are useful in the context of testing.
TestListenableWorkerBuilder<W extends ListenableWorker>	Builds instances of `ListenableWorker` which can be used for testing.
TestNavigationManager	The `NavigationManager` that is used for testing.
TestScreenManager	The `ScreenManager` that is used for testing.
TestWearableButtonsProvider	A `WearableButtonsProvider` suitable for use in tests.
TestWearableButtonsProvider.TestWearableButtonLocation	Class describing the location of a button on a wearable device.
TestWorkerBuilder<W extends Worker>	Builds instances of `Worker` which can be used for testing.
TextClassification	Information for generating a widget to handle classified text.
TextClassification.Builder	Builder for building `TextClassification` objects.
TextClassification.Request	A request object for generating TextClassification.
TextClassification.Request.Builder	A builder for building TextClassification requests.
TextClassificationContext	A representation of the context in which text classification would be performed.
TextClassificationContext.Builder	A builder for building a TextClassification context.
TextClassificationManager	Class to handle the creation of `TextClassifier`.
TextClassificationSessionId	This class represents the id of a text classification session.
TextClassifier	Interface for providing text classification related features.
TextClassifier.EntityConfig	Configuration object for specifying what entities to identify.
TextClassifier.EntityConfig.Builder	Builder class to construct the `TextClassifier.EntityConfig` object.
TextDirectionHeuristicCompat	Interface for objects that use a heuristic for guessing at the paragraph direction by examining text.
TextDirectionHeuristicsCompat	Some objects that implement TextDirectionHeuristic.
TextLinks	A collection of links, representing subsequences of text and the entity types (phone number, address, url, etc) they may be.
TextLinks.Builder	A builder to construct a TextLinks instance.
TextLinks.DefaultTextLinkSpan	The default implementation of `TextLinks.TextLinkSpan`.
TextLinks.Request	A request object for generating TextLinks.
TextLinks.Request.Builder	A builder for building TextLinks requests.
TextLinks.SpanFactory	A factory to create spans from TextLinks.
TextLinks.TextLink	A link, identifying a substring of text and possible entity types for it.
TextLinks.TextLinkSpan	A ClickableSpan for a TextLink.
TextLinks.TextLinkSpanData	Contains necessary data for `TextLinks.TextLinkSpan`.
TextLinksParams	Used to specify how to apply links when using `TextLinks.apply(Spannable, TextClassifier, TextLinksParams)` APIs.
TextLinksParams.Builder	A builder for building TextLinksParams.
TextSelection	Information about where text selection should be.
TextSelection.Builder	Builder used to build `TextSelection` objects.
TextSelection.Request	A request object for generating TextSelection.
TextSelection.Request.Builder	A builder for building TextSelection requests.
TextUtilsCompat	Backwards compatible version of `TextUtils`.
TextViewCompat	Helper for accessing features in `TextView`.
TextViewStyle	Specifies the style for a `TextView`.
TextViewStyle.Builder	Builder for the `TextViewStyle`.
ThemedSpinnerAdapter	An extension of SpinnerAdapter that is capable of inflating drop-down views against a different theme than normal views.
ThemedSpinnerAdapter.Helper	A helper class which allows easy integration of `ThemedSpinnerAdapter` into existing `SpinnerAdapter`s in a backwards compatible way.
ThumbRating	A class for rating with a single degree of rating, "thumb up" vs "thumb down".
TileBuilders	Builders for the components of a tile that can be rendered by a tile renderer.
TileBuilders.Tile	A holder for a tile.
TileBuilders.Tile.Builder	Builder for `TileBuilders.Tile`
TileProviderClient	Client to connect and interact with a TileProviderService.
TileProviderService	Base class for a service providing data for an app tile.
TileRenderer	Renderer for Wear Tiles.
TileRenderer.LoadActionListener	Listener for clicks on Clickable objects that have an Action to (re)load the contents of a tile.
TilesExperimental	Denotes that this API surface is experimental.
TilesTimelineCache	Timeline cache for Wear Tiles.
TilesTimelineManager	Manager for a single Wear Tiles timeline.
TilesTimelineManager.Clock	Interface so this manager can retrieve the current time.
TilesTimelineManager.Listener	Type to listen for layout updates from a given timeline.
TileUpdateRequester	Interface used for a Tile Provider to notify a Tile Renderer that it should fetch a new Timeline from it.
TimeAnimator	This class provides a simple callback mechanism to listeners that is synchronized with all other animators in the system.
TimeAnimator.TimeListener	Implementors of this interface can set themselves as update listeners to a `TimeAnimator` instance to receive callbacks on every animation frame to receive the total time since the animator started and the delta time since the last frame.
TimeDependentText	Represents the status or a part of the status of an ongoing activity.
TimedMetaData	Class that embodies one timed metadata access unit, including a time stamp, and raw uninterpreted byte-array extracted directly from the container.
TimelineBuilders	Builders for a timeline with entries representing content that should be displayed within given time intervals.
TimelineBuilders.TimeInterval	A time interval, typically used to describe the validity period of a `TimelineBuilders.TimelineEntry`.
TimelineBuilders.TimeInterval.Builder	Builder for `TimelineBuilders.TimeInterval`
TimelineBuilders.Timeline	A collection of `TimelineBuilders.TimelineEntry` items.
TimelineBuilders.Timeline.Builder	Builder for `TimelineBuilders.Timeline`
TimelineBuilders.TimelineEntry	One piece of renderable content along with the time that it is valid for.
TimelineBuilders.TimelineEntry.Builder	Builder for `TimelineBuilders.TimelineEntry`
TimePicker	`TimePicker` is a direct subclass of `Picker`.
TintableBackgroundView	Interface which allows a `View` to receive background tinting calls from `ViewCompat` when running on API v20 devices or lower.
TintableCompoundButton	Interface which allows a `CompoundButton` to receive tinting calls from `CompoundButtonCompat` when running on API v20 devices or lower.
TintableCompoundDrawablesView	Interface which allows `TextView` and subclasses to tint compound drawables with `TextViewCompat` when running on API v22 devices or lower.
TitleHelper	Helper for managing `TitleView`, including transitions and focus movement.
TitleView	Title view for a leanback fragment.
TitleViewAdapter	This class allows a customized widget class to implement `TitleViewAdapter.Provider` and expose `TitleViewAdapter` methods to containing fragment (e.g.
TitleViewAdapter.Provider	Interface to be implemented by a customized widget class to implement `TitleViewAdapter`.
Toggle	Represents a toggle that can have either a checked or unchecked state.
Toggle.Builder	A builder of `Toggle`.
Toggle.OnCheckedChangeListener	A listener for handling checked state change events.
Token	Stores a package's identity, a combination of its package name and signing certificate.
TokenStore	Users should implement this interface to persist the given `Token` (across app restarts).
TollCard	Information about toll card capabilities in a car.
TollCard.Builder	A builder of `TollCard`.
Toolbar	A standard toolbar for use within application content.
Toolbar.LayoutParams	Layout information for child views of Toolbars.
Toolbar.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
Toolbar.SavedState
TooltipCompat	Helper class used to emulate the behavior of `View.setTooltipText(CharSequence)` prior to API level 26.
TorchState	The camera flash torch state.
Trace	Writes trace events to the system trace buffer.
TraceCompat	This class is deprecated. TraceCompat is deprecated in favor of androidx.tracing.Trace. Please use that instead.
TracingConfig	Holds tracing configuration information and predefined settings for `TracingController`.
TracingConfig.Builder	Builder used to create `TracingConfig` objects.
TracingController	Manages tracing of WebViews.
TrafficStatsCompat	Helper for accessing features in `TrafficStats`.
Transaction	Marks a method in a `Dao` class as a transaction method.
Transformations	Transformation methods for `LiveData`.
Transition	A Transition holds information about animations that will be run on its targets during a scene change.
Transition.EpicenterCallback	Class to get the epicenter of Transition.
Transition.TransitionListener	A transition listener receives notifications from a transition.
TransitionInflater	This class inflates scenes and transitions from resource files.
TransitionListenerAdapter	This adapter class provides empty implementations of the methods from `Transition.TransitionListener`.
TransitionManager	This class manages the set of transitions that fire when there is a change of `Scene`.
TransitionPropagation	Extend `TransitionPropagation` to customize start delays for Animators created in `Transition.createAnimator(ViewGroup, TransitionValues, TransitionValues)`.
TransitionRes	Denotes that an integer parameter, field or method return value is expected to be a transition resource reference.
TransitionSet	A TransitionSet is a parent of child transitions (including other TransitionSets).
TransitionValues	Data structure which holds cached values for the transition.
TravelEstimate	Represents the travel estimates to a destination of a trip or for a trip segment, including the remaining time and distance to the destination.
TravelEstimate.Builder	A builder of `TravelEstimate`.
Trip	Represents information about a trip including destinations, steps, and travel estimates.
Trip.Builder	A builder of `Trip`.
TrustedWebActivityCallback	A callback class for browser to get messages from client app.
TrustedWebActivityCallbackRemote	TrustedWebActivityCallbackRemote is used by client app to execute callbacks from a binder of `TrustedWebActivityCallback`.
TrustedWebActivityDisplayMode	Represents display mode of a Trusted Web Activity.
TrustedWebActivityDisplayMode.DefaultMode	Default mode: the system UI (status bar, navigation bar) is shown, and the browser toolbar is hidden while the user is on a verified origin.
TrustedWebActivityDisplayMode.ImmersiveMode	Immersive mode: both the browser controls and the system UI (status bar, navigation bar) is hidden while the user is on a verified origin.
TrustedWebActivityIntent	Holds an `Intent` and other data necessary to start a Trusted Web Activity.
TrustedWebActivityIntentBuilder	Constructs instances of `TrustedWebActivityIntent` that can be used to start Trusted Web Activities (see `TrustedWebUtils` for more details).
TrustedWebActivityService	The TrustedWebActivityService lives in a client app and serves requests from a Trusted Web Activity provider.
TrustedWebActivityServiceConnection	TrustedWebActivityServiceConnection is used by a Trusted Web Activity provider to wrap calls to the `TrustedWebActivityService` in the client app.
TrustedWebActivityServiceConnectionPool	A TrustedWebActivityServiceConnectionPool will be used by a Trusted Web Activity provider and takes care of connecting to and communicating with `TrustedWebActivityService`s.
TrustedWebUtils	Class for utilities and convenience calls for opening a qualifying web page as a Trusted Web Activity.
TvContractCompat	The contract between the TV provider and applications.
TvContractCompat.BaseTvColumns	Common base for the tables of TV channels/programs.
TvContractCompat.Channels	Column definitions for the TV channels table.
TvContractCompat.Channels.Logo	A sub-directory of a single TV channel that represents its primary logo.
TvContractCompat.PreviewPrograms	Column definitions for the preview TV programs table.
TvContractCompat.Programs	Column definitions for the TV programs table.
TvContractCompat.Programs.Genres	Canonical genres for TV programs.
TvContractCompat.RecordedPrograms	Column definitions for the recorded TV programs table.
TvContractCompat.WatchNextPrograms	Column definitions for the "watch next" TV programs table.
TwoStatePreference	Common base class for preferences that have two selectable states, save a boolean value, and may have dependent preferences that are enabled/disabled based on the current state.
TypeBuilders	Builders for extensible primitive types used by layout elements.
TypeBuilders.BoolProp	A boolean type.
TypeBuilders.BoolProp.Builder	Builder for `TypeBuilders.BoolProp`
TypeBuilders.FloatProp	A float type.
TypeBuilders.FloatProp.Builder	Builder for `TypeBuilders.FloatProp`
TypeBuilders.Int32Prop	An int32 type.
TypeBuilders.Int32Prop.Builder	Builder for `TypeBuilders.Int32Prop`
TypeBuilders.StringProp	A string type.
TypeBuilders.StringProp.Builder	Builder for `TypeBuilders.StringProp`
TypeConverter<T, V>	Abstract base class used convert type T to another type V.
TypeConverter	Marks a method as a type converter.
TypeConverters	Specifies additional type converters that Room can use.
TypeEvaluator<T>	Interface for use with the `ValueAnimator.setEvaluator(TypeEvaluator)` function.
TypefaceCompat	Helper for accessing features in `Typeface`.

U

UiThread	Denotes that the annotated method or constructor should only be called on the UI thread.
UiVersions	Defines the inline suggestion UI version constants.
UiVersions.Content	Represents the UI content that can be converted into a `Slice` to be read to render a UI in a remote process.
UiVersions.Style	Represents a UI style specification that contains the version information and can be converted into a Bundle to be read to render a UI in a remote process.
UiVersions.StylesBuilder	A builder responsible for providing a `Bundle` with encoded UI style specifications for one or more versions of UI templates.
UnknownAuthenticationKeyException	Thrown if trying to certify an unknown dynamic authentication key.
Update	Marks a method in a `Dao` annotated class as an update method.
UriCompat	Helper for accessing function in `Uri` in a backwards compatible fashion.
UriMediaItem	Structure for media item descriptor for `Uri`.
UriMediaItem.Builder	This Builder class simplifies the creation of a `UriMediaItem` object.
UseCase	The use case which all other use cases are built on top of.
UseCaseGroup	Represents a collection of `UseCase`.
UseCaseGroup.Builder	A builder for generating `UseCaseGroup`.
UserHandleCompat	Helper for accessing features in `UserHandle` in a backwards compatible fashion.
UserManagerCompat	Helper for accessing features in `UserManager` in a backwards compatible fashion.

V

ValueAnimator	This class provides a simple timing engine for running animations which calculate animated values and set them on target objects.
VectorDrawableCompat	For API 24 and above, this class delegates to the framework's `VectorDrawable`.
VelocityTrackerCompat	This class is deprecated. Use `VelocityTracker` directly.
VersionedParcelable	Tags a class that can be used with `ParcelUtils`.
VerticalGridFragment	This class is deprecated. use `VerticalGridSupportFragment`
VerticalGridPresenter	A presenter that renders objects in a `VerticalGridView`.
VerticalGridPresenter.ViewHolder	ViewHolder for the VerticalGridPresenter.
VerticalGridSupportFragment	A fragment for creating leanback vertical grids.
VerticalGridView	A `ViewGroup` that shows items in a vertically scrolling list.
VideoFragment	This class is deprecated. use `VideoSupportFragment`
VideoFragmentGlueHost	This class is deprecated. use `VideoSupportFragmentGlueHost`
VideoSize	Immutable class for describing video size.
VideoSize	Immutable class for describing video size.
VideoSupportFragment	Subclass of `PlaybackSupportFragment` that is responsible for providing a `SurfaceView` and rendering video.
VideoSupportFragmentGlueHost	`PlaybackGlueHost` implementation the interaction between `PlaybackGlue` and `VideoSupportFragment`.
VideoView	A high level view for media playback that can be integrated with either a `SessionPlayer` or a `MediaController`.
VideoView.OnViewTypeChangedListener	Interface definition of a callback to be invoked when the view type has been changed.
ViewCompat	Helper for accessing features in `View`.
ViewCompat.OnUnhandledKeyEventListenerCompat	Interface definition for a callback to be invoked when a hardware key event hasn't been handled by the view hierarchy.
ViewConfigurationCompat	Helper for accessing features in `ViewConfiguration`.
ViewDragHelper	ViewDragHelper is a utility class for writing custom ViewGroups.
ViewDragHelper.Callback	A Callback is used as a communication channel with the ViewDragHelper back to the parent view using it.
ViewGroupCompat	Helper for accessing features in `ViewGroup`.
ViewHolderTask	Interface for schedule task on a ViewHolder.
ViewModel	ViewModel is a class that is responsible for preparing and managing the data for an `Activity` or a `Fragment`.
ViewModelProvider	An utility class that provides `ViewModels` for a scope.
ViewModelProvider.AndroidViewModelFactory	`ViewModelProvider.Factory` which may create `AndroidViewModel` and `ViewModel`, which have an empty constructor.
ViewModelProvider.Factory	Implementations of `Factory` interface are responsible to instantiate ViewModels.
ViewModelProvider.NewInstanceFactory	Simple factory, which calls empty constructor on the give class.
ViewModelProviders	This class is deprecated. Use the constructors for `ViewModelProvider` directly.
ViewModelProviders.DefaultFactory	This class is deprecated. Use `ViewModelProvider.AndroidViewModelFactory`
ViewModelStore	Class to store `ViewModels`.
ViewModelStoreOwner	A scope that owns `ViewModelStore`.
ViewModelStores	This class is deprecated. Use `ComponentActivity.getViewModelStore()` or `Fragment.getViewModelStore()` to retrieve a `ViewModelStore` directly from activities and fragments.
ViewPager	Layout manager that allows the user to flip left and right through pages of data.
ViewPager.DecorView	Annotation which allows marking of views to be decoration views when added to a view pager.
ViewPager.LayoutParams	Layout parameters that should be supplied for views added to a ViewPager.
ViewPager.OnAdapterChangeListener	Callback interface for responding to adapter changes.
ViewPager.OnPageChangeListener	Callback interface for responding to changing state of the selected page.
ViewPager.PageTransformer	A PageTransformer is invoked whenever a visible/attached page is scrolled.
ViewPager.SavedState	This is the persistent state that is saved by ViewPager.
ViewPager.SimpleOnPageChangeListener	Simple implementation of the `ViewPager.OnPageChangeListener` interface with stub implementations of each method.
ViewPager2	ViewPager2 replaces `ViewPager`, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
ViewPager2.OnPageChangeCallback	Callback interface for responding to changing state of the selected page.
ViewPager2.PageTransformer	A PageTransformer is invoked whenever a visible/attached page is scrolled.
ViewParentCompat	Helper for accessing features in `ViewParent`.
ViewPort	The field of view of one or many `UseCase`s.
ViewPort.Builder	Builder for `ViewPort`.
ViewPropertyAnimatorCompat
ViewPropertyAnimatorListener	An animation listener receives notifications from an animation.
ViewPropertyAnimatorListenerAdapter	This adapter class provides empty implementations of the methods from `ViewPropertyAnimatorListener`.
ViewPropertyAnimatorUpdateListener	Implementors of this interface can add themselves as update listeners to an `ViewPropertyAnimatorCompat` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `ViewPropertyAnimatorCompat`.
ViewStyle	Specifies the style for a `View` or a `ViewGroup`.
ViewStyle.Builder	Builder for the `ViewStyle`.
ViewTreeLifecycleOwner	Accessors for finding a view tree-local `LifecycleOwner` that reports the lifecycle for the given view.
ViewTreeSavedStateRegistryOwner	Accessors for finding a view tree-local `SavedStateRegistryOwner` that allows managing the saving state using `SavedStateRegistry` for the given view.
ViewTreeViewModelStoreOwner	Accessors for finding a view tree-local `ViewModelStoreOwner` that allows access to a `ViewModelStore` for the given view.
Violation	Root class for all FragmentStrictMode violations.
Visibility	This transition tracks changes to the visibility of target views in the start and end scenes.
VisibilityPropagation	Base class for `TransitionPropagation`s that care about View Visibility and the center position of the View.
VisibleForTesting	Denotes that the class, method or field has its visibility relaxed, so that it is more widely visible than otherwise necessary to make code testable.
VolumeProviderCompat	Handles requests to adjust or set the volume on a session.
VolumeProviderCompat.Callback	Listens for changes to the volume.

W

WakefulBroadcastReceiver	This class is deprecated. As of `Android O`, background check restrictions make this class no longer generally useful. (It is generally not safe to start a service from the receipt of a broadcast, because you don't have any guarantees that your app is in the foreground at this point and thus allowed to do so.) Instead, developers should use android.app.job.JobScheduler to schedule a job, and this does not require that the app hold a wake lock while doing so (the system will take care of holding a wake lock for the job).
WatchNextProgram	A convenience class to access `TvContractCompat.WatchNextPrograms` entries in the system content provider.
WatchNextProgram.Builder	This Builder class simplifies the creation of a `WatchNextProgram` object.
WearableActionDrawerView	Ease of use class for creating a Wearable action drawer.
WearableButtons	Class containing helpers for managing wearable buttons.
WearableButtons.ButtonInfo	Metadata for a specific button.
WearableButtonsProvider	A provider interface to allow `WearableButtons` to query for information on the device's buttons from the platform.
WearableCalendarContract	The contract between the wearable calendar provider and applications.
WearableCalendarContract.Attendees
WearableCalendarContract.Instances
WearableCalendarContract.Reminders
WearableDrawerController	Provides the ability to manipulate a `WearableDrawerView's` position within a `WearableDrawerLayout`.
WearableDrawerLayout	Top-level container that allows interactive drawers to be pulled from the top and bottom edge of the window.
WearableDrawerLayout.DrawerStateCallback	Listener for monitoring events about drawers.
WearableDrawerView	View that contains drawer content and a peeking view for use with `WearableDrawerLayout`.
WearableLinearLayoutManager	This wear-specific implementation of `LinearLayoutManager` provides basic offsetting logic for updating child layout.
WearableLinearLayoutManager.LayoutCallback	Callback for interacting with layout passes.
WearableNavigationDrawerView	Ease of use class for creating a Wearable navigation drawer.
WearableNavigationDrawerView.OnItemSelectedListener	Listener which is notified when the user selects an item.
WearableNavigationDrawerView.WearableNavigationDrawerAdapter	Adapter for specifying the contents of WearableNavigationDrawer.
WearableRecyclerView	Wearable specific implementation of the `RecyclerView` enabling `setCircularScrollingGestureEnabled(boolean)` circular scrolling} and semi-circular layouts.
WearTypeHelper	Helper class for determining whether the given Wear OS device is for China or rest of the world.
WebMessageCompat	The Java representation of the HTML5 PostMessage event.
WebMessagePortCompat	The Java representation of the HTML5 message ports.
WebMessagePortCompat.WebMessageCallbackCompat	The listener for handling MessagePort events.
WebResourceErrorCompat	Compatibility version of `WebResourceError`.
WebResourceRequestCompat	Compatibility version of `WebResourceRequest`.
WebSettingsCompat	Compatibility version of `WebSettings`
WebViewAssetLoader	Helper class to load local files including application's static assets and resources using http(s):// URLs inside a `WebView` class.
WebViewAssetLoader.AssetsPathHandler	Handler class to open a file from assets directory in the application APK.
WebViewAssetLoader.Builder	A builder class for constructing `WebViewAssetLoader` objects.
WebViewAssetLoader.InternalStoragePathHandler	Handler class to open files from application internal storage.
WebViewAssetLoader.PathHandler	A handler that produces responses for a registered path.
WebViewAssetLoader.ResourcesPathHandler	Handler class to open a file from resources directory in the application APK.
WebViewClientCompat	Compatibility version of `WebViewClient`.
WebViewCompat	Compatibility version of `WebView`
WebViewCompat.VisualStateCallback	Callback interface supplied to `WebViewCompat.postVisualStateCallback(WebView, long, WebViewCompat.VisualStateCallback)` for receiving notifications about the visual state.
WebViewCompat.WebMessageListener	This listener receives messages sent on the JavaScript object which was injected by `WebViewCompat.addWebMessageListener(WebView, String, Set, WebViewCompat.WebMessageListener)`.
WebViewFeature	Utility class for checking which WebView Support Library features are supported on the device.
WebViewRenderProcess	WebViewRenderProcess provides an opaque handle to a WebView renderer.
WebViewRenderProcessClient	Used to receive callbacks on `WebView` renderer events.
WindowCompat	Helper for accessing features in `Window`.
WindowInsetsAnimationCompat	Class representing an animation of a set of windows that cause insets.
WindowInsetsAnimationCompat.BoundsCompat	Class representing the range of an `WindowInsetsAnimationCompat`
WindowInsetsAnimationCompat.Callback	Interface that allows the application to listen to animation events for windows that cause insets.
WindowInsetsAnimationControllerCompat	Controller for app-driven animation of system windows.
WindowInsetsAnimationControlListenerCompat	Listener that encapsulates a request to `WindowInsetsControllerCompat.controlWindowInsetsAnimation(int, long, Interpolator, CancellationSignal, WindowInsetsAnimationControlListenerCompat)`.
WindowInsetsCompat	Describes a set of insets for window content.
WindowInsetsCompat.Builder	Builder for `WindowInsetsCompat`.
WindowInsetsCompat.Type	Class that defines different types of sources causing window insets.
WindowInsetsControllerCompat	Provide simple controls of windows that generate insets.
WindowInsetsControllerCompat.OnControllableInsetsChangedListener	Listener to be notified when the set of controllable `WindowInsetsCompat.Type` controlled by a `WindowInsetsController` changes.
WorkContinuation	A class that allows you to chain together `OneTimeWorkRequest`s.
Worker	A class that performs work synchronously on a background thread provided by `WorkManager`.
WorkerFactory	A factory object that creates `ListenableWorker` instances.
WorkerParameters	Setup parameters for a `ListenableWorker`.
WorkerThread	Denotes that the annotated method should only be called on a worker thread.
WorkInfo	Information about a particular `WorkRequest` containing the id of the WorkRequest, its current `WorkInfo.State`, output, tags, and run attempt count.
WorkInfo.State	The current lifecycle state of a `WorkRequest`.
WorkManager	WorkManager is a library used to enqueue deferrable work that is guaranteed to execute sometime after its `Constraints` are met.
WorkManagerInitializer	Initializes `WorkManager` using `androidx.startup`.
WorkManagerTestInitHelper	Helps initialize `WorkManager` for testing.
WorkQuery	A specification for querying `WorkRequest`s.
WorkQuery.Builder	A builder for `WorkQuery`.
WorkRequest	The base class for specifying parameters for work that should be enqueued in `WorkManager`.
WorkRequest.Builder<B extends Builder<?, ?>, W extends WorkRequest>	A builder for `WorkRequest`s.
WritableIdentityCredential	Class used to personalize a new identity credential.
WrongFragmentContainerViolation	See #`FragmentStrictMode.Policy.Builder.detectWrongFragmentContainer()`.

X

XmlRes Denotes that an integer parameter, field or method return value is expected to be an XML resource reference.

Z

ZoomState An interface which contains the zoom related information from a camera.