Summary: Nested Classes | Ctors | Methods | Protected Methods | Inherited Methods

RowHeaderPresenter

Kotlin |Java

public class RowHeaderPresenter
extends Presenter

java.lang.Object
↳	androidx.leanback.widget.Presenter
	↳	androidx.leanback.widget.RowHeaderPresenter

RowHeaderPresenter provides a default presentation for HeaderItem using a RowHeaderView and optionally a TextView for description. If a subclass creates its own view, the subclass must also override onCreateViewHolder(ViewGroup), onSelectLevelChanged(ViewHolder).

Summary

Nested classes
`class`	`RowHeaderPresenter.ViewHolder` A ViewHolder for the RowHeaderPresenter.

Public constructors
`RowHeaderPresenter()` Creates default RowHeaderPresenter using a title view and a description view.

Public methods
`int`	`getSpaceUnderBaseline(RowHeaderPresenter.ViewHolder holder)` Returns the space (distance in pixels) below the baseline of the text view, if one exists; otherwise, returns 0.
`boolean`	`isNullItemVisibilityGone()` Returns true if the view visibility is set to `View.GONE` when bound to null.
`void`	`onBindViewHolder(Presenter.ViewHolder viewHolder, Object item)` Binds a `View` to an item.
`Presenter.ViewHolder`	`onCreateViewHolder(ViewGroup parent)` Creates a new `View`.
`void`	`onUnbindViewHolder(Presenter.ViewHolder viewHolder)` Unbinds a `View` from an item.
`void`	`setNullItemVisibilityGone(boolean nullItemVisibilityGone)` Optionally sets the view visibility to `View.GONE` when bound to null.
`final void`	`setSelectLevel(RowHeaderPresenter.ViewHolder holder, float selectLevel)` Sets the select level.

Protected methods
`static float`	`getFontDescent(TextView textView, Paint fontMeasurePaint)`
`void`	`onSelectLevelChanged(RowHeaderPresenter.ViewHolder holder)` Called when the select level changes.

Inherited methods

From class


        
          androidx.leanback.widget.Presenter

`static void`	`cancelAnimationsRecursive(View view)` Utility method for removing all running animations on a view.
`final Object`	`getFacet(Class<?> facetClass)` Queries optional implemented facet.
`abstract void`	`onBindViewHolder(Presenter.ViewHolder viewHolder, Object item)` Binds a `View` to an item.
`void`	`onBindViewHolder(Presenter.ViewHolder viewHolder, Object item, List<Object> payloads)` Binds a `View` to an item with a list of payloads.
`abstract Presenter.ViewHolder`	`onCreateViewHolder(ViewGroup parent)` Creates a new `View`.
`abstract void`	`onUnbindViewHolder(Presenter.ViewHolder viewHolder)` Unbinds a `View` from an item.
`void`	`onViewAttachedToWindow(Presenter.ViewHolder holder)` Called when a view created by this presenter has been attached to a window.
`void`	`onViewDetachedFromWindow(Presenter.ViewHolder holder)` Called when a view created by this presenter has been detached from its window.
`final void`	`setFacet(Class<?> facetClass, Object facetImpl)` Sets dynamic implemented facet in addition to basic Presenter functions.
`void`	`setOnClickListener(Presenter.ViewHolder holder, View.OnClickListener listener)` Called to set a click listener for the given view holder.

From class


        
          java.lang.Object

`Object`	`clone()`
`boolean`	`equals(Object arg0)`
`void`	`finalize()`
`final Class<?>`	`getClass()`
`int`	`hashCode()`
`final void`	`notify()`
`final void`	`notifyAll()`
`String`	`toString()`
`final void`	`wait(long arg0, int arg1)`
`final void`	`wait(long arg0)`
`final void`	`wait()`

From interface


        
          androidx.leanback.widget.FacetProvider


        abstract
        
        
        
        
        Object


      getFacet(Class<?> facetClass)

Queries optional implemented facet.

Public constructors

RowHeaderPresenter

public RowHeaderPresenter ()

Creates default RowHeaderPresenter using a title view and a description view.

See also:

RowHeaderPresenter.ViewHolder.RowHeaderPresenter.ViewHolder(View)

Public methods

public int getSpaceUnderBaseline (RowHeaderPresenter.ViewHolder holder)

Returns the space (distance in pixels) below the baseline of the text view, if one exists; otherwise, returns 0.

Parameters
`holder`	`RowHeaderPresenter.ViewHolder`

Returns
`int`

isNullItemVisibilityGone

public boolean isNullItemVisibilityGone ()

Returns true if the view visibility is set to View.GONE when bound to null.

Returns
`boolean`

public void onBindViewHolder (Presenter.ViewHolder viewHolder, 
                Object item)

Binds a View to an item.

Parameters
`viewHolder`	`Presenter.ViewHolder`
`item`	`Object`

onCreateViewHolder

public Presenter.ViewHolder onCreateViewHolder (ViewGroup parent)

Creates a new View.

Parameters
`parent`	`ViewGroup`

Returns
`Presenter.ViewHolder`

public void onUnbindViewHolder (Presenter.ViewHolder viewHolder)

Unbinds a View from an item. Any expensive references may be released here, and any fields that are not bound for every item should be cleared here.

Parameters
`viewHolder`	`Presenter.ViewHolder`

setNullItemVisibilityGone

public void setNullItemVisibilityGone (boolean nullItemVisibilityGone)

Optionally sets the view visibility to View.GONE when bound to null.

Parameters
`nullItemVisibilityGone`	`boolean`

public final void setSelectLevel (RowHeaderPresenter.ViewHolder holder, 
                float selectLevel)

Sets the select level.

Parameters
`holder`	`RowHeaderPresenter.ViewHolder`
`selectLevel`	`float`

Protected methods

protected static float getFontDescent (TextView textView, 
                Paint fontMeasurePaint)

Parameters
`textView`	`TextView`
`fontMeasurePaint`	`Paint`

Returns
`float`

protected void onSelectLevelChanged (RowHeaderPresenter.ViewHolder holder)

Called when the select level changes. The default implementation sets the alpha on the view.

Parameters
`holder`	`RowHeaderPresenter.ViewHolder`

RowHeaderPresenter

Summary

Nested classes

Public constructors

Public methods

Protected methods

Inherited methods

Public constructors

RowHeaderPresenter

Public methods

getSpaceUnderBaseline

isNullItemVisibilityGone

onBindViewHolder

onCreateViewHolder

onUnbindViewHolder

setNullItemVisibilityGone

setSelectLevel

Protected methods

getFontDescent

onSelectLevelChanged