Summary: Ctors | Methods | Inherited Methods

SurfaceControl.Transaction

public static class SurfaceControl.Transaction
extends Object implements Closeable

java.lang.Object
↳	android.view.SurfaceControl.Transaction

An atomic set of changes to a set of SurfaceControl.

Summary

Public constructors
`SurfaceControl.Transaction()` Open a new transaction object.

Public methods
`void`	`apply()` Apply the transaction, clearing it's state, and making it usable as a new transaction.
`void`	`close()` Close the transaction, if the transaction was not already applied this will cancel the transaction.
`SurfaceControl.Transaction`	`merge(SurfaceControl.Transaction other)` Merge the other transaction into this transaction, clearing the other transaction as if it had been applied.
`SurfaceControl.Transaction`	`reparent(SurfaceControl sc, SurfaceControl newParent)` Re-parents a given layer to a new parent.
`SurfaceControl.Transaction`	`setAlpha(SurfaceControl sc, float alpha)` Set the alpha for a given surface.
`SurfaceControl.Transaction`	`setBufferSize(SurfaceControl sc, int w, int h)` Set the default buffer size for the SurfaceControl, if there is an `Surface` assosciated with the control, then this will be the default size for buffers dequeued from it.
`SurfaceControl.Transaction`	`setGeometry(SurfaceControl sc, Rect sourceCrop, Rect destFrame, int orientation)` Specify how the buffer assosciated with this Surface is mapped in to the parent coordinate space.
`SurfaceControl.Transaction`	`setLayer(SurfaceControl sc, int z)` Set the Z-order for a given SurfaceControl, relative to it's siblings.
`SurfaceControl.Transaction`	`setVisibility(SurfaceControl sc, boolean visible)` Toggle the visibility of a given Layer and it's sub-tree.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


        
          java.io.Closeable


      close()

Closes this stream and releases any system resources associated with it.

From interface


        
          java.lang.AutoCloseable


      close()

Closes this resource, relinquishing any underlying resources.

Public constructors

SurfaceControl.Transaction

Added in Android Q

public SurfaceControl.Transaction ()

Open a new transaction object. The transaction may be filed with commands to manipulate SurfaceControl instances, and then applied atomically with apply(). Eventually the user should invoke close(), when the object is no longer required. Note however that re-using a transaction after a call to apply is allowed as a convenience.

Public methods

apply

Added in Android Q

public void apply ()

Apply the transaction, clearing it's state, and making it usable as a new transaction.

close

Added in Android Q

public void close ()

Close the transaction, if the transaction was not already applied this will cancel the transaction.

merge

Added in Android Q

public SurfaceControl.Transaction merge (SurfaceControl.Transaction other)

Merge the other transaction into this transaction, clearing the other transaction as if it had been applied.

Parameters
`other`	`SurfaceControl.Transaction`: The transaction to merge in to this one. This value must never be `null`.

Returns
`SurfaceControl.Transaction`	This transaction. This value will never be `null`.

reparent

Added in Android Q

public SurfaceControl.Transaction reparent (SurfaceControl sc, 
                SurfaceControl newParent)

Re-parents a given layer to a new parent. Children inherit transform (position, scaling) crop, visibility, and Z-ordering from their parents, as if the children were pixels within the parent Surface.

Parameters
`sc`	`SurfaceControl`: The SurfaceControl to reparent This value must never be `null`.
`newParent`	`SurfaceControl`: The new parent for the given control. This value may be `null`.

Returns
`SurfaceControl.Transaction`	This Transaction This value will never be `null`.

setAlpha

Added in Android Q

public SurfaceControl.Transaction setAlpha (SurfaceControl sc, 
                float alpha)

Set the alpha for a given surface. If the alpha is non-zero the SurfaceControl will be blended with the Surfaces under it according to the specified ratio.

Parameters
`sc`	`SurfaceControl`: The given SurfaceControl. This value must never be `null`.
`alpha`	`float`: The alpha to set. Value is between 0.0 and 1.0 inclusive

Returns
`SurfaceControl.Transaction`	This value will never be `null`.

setBufferSize

Added in Android Q

public SurfaceControl.Transaction setBufferSize (SurfaceControl sc, 
                int w, 
                int h)

Set the default buffer size for the SurfaceControl, if there is an Surface assosciated with the control, then this will be the default size for buffers dequeued from it.

Parameters
`sc`	`SurfaceControl`: The surface to set the buffer size for. This value must never be `null`.
`w`	`int`: The default width Value is 0 or greater
`h`	`int`: The default height Value is 0 or greater

Returns
`SurfaceControl.Transaction`	This Transaction This value will never be `null`.

setGeometry

Added in Android Q

public SurfaceControl.Transaction setGeometry (SurfaceControl sc, 
                Rect sourceCrop, 
                Rect destFrame, 
                int orientation)

Specify how the buffer assosciated with this Surface is mapped in to the parent coordinate space. The source frame will be scaled to fit the destination frame, after being rotated according to the orientation parameter.

Parameters
`sc`	`SurfaceControl`: The SurfaceControl to specify the geometry of This value must never be `null`.
`sourceCrop`	`Rect`: The source rectangle in buffer space. Or null for the entire buffer. This value may be `null`.
`destFrame`	`Rect`: The destination rectangle in parent space. Or null for the source frame. This value may be `null`.
`orientation`	`int`: The buffer rotation Value is `Surface.ROTATION_0`, `Surface.ROTATION_90`, `Surface.ROTATION_180`, or `Surface.ROTATION_270`

Returns
`SurfaceControl.Transaction`	This transaction object.

setLayer

Added in Android Q

public SurfaceControl.Transaction setLayer (SurfaceControl sc, 
                int z)

Set the Z-order for a given SurfaceControl, relative to it's siblings. If two siblings share the same Z order the ordering is undefined. Surfaces with a negative Z will be placed below the parent surface.

Parameters
`sc`	`SurfaceControl`: The SurfaceControl to set the Z order on This value must never be `null`.
`z`	`int`: The Z-order Value is between Integer.MIN_VALUE and Integer.MAX_VALUE inclusive

Returns
`SurfaceControl.Transaction`	This Transaction. This value will never be `null`.

setVisibility

Added in Android Q

public SurfaceControl.Transaction setVisibility (SurfaceControl sc, 
                boolean visible)

Toggle the visibility of a given Layer and it's sub-tree.

Parameters
`sc`	`SurfaceControl`: The SurfaceControl for which to set the visibility This value must never be `null`.
`visible`	`boolean`: The new visibility

Returns
`SurfaceControl.Transaction`	This transaction object. This value will never be `null`.