PresenterSwitcher

Kotlin |Java

abstract class PresenterSwitcher

kotlin.Any
↳	androidx.leanback.widget.PresenterSwitcher

Known Direct Subclasses HorizontalHoverCardSwitcher HorizontalHoverCardSwitcher A helper class for showing a hover card view below a HorizontalGridView.

An abstract helper class that switches a view in its parent view using a PresenterSelector. A subclass should implement insertView(View) to define how to add the view in parent, and may optionally override onViewSelected(View).

Summary

Public constructors
<init>() An abstract helper class that switches a view in its parent view using a PresenterSelector.

Public methods
open Unit	clear() Destroys created views.
ViewGroup!	getParentViewGroup() Returns the parent.
open Unit	init(parent: ViewGroup!, presenterSelector: PresenterSelector!) Initializes the switcher with a parent view to insert view into and a PresenterSelector for choosing a Presenter for a given object.
open Unit	select(object: Any!) Selects a view based on the given object and shows that view.
open Unit	unselect() Hides the view.

Protected methods
abstract Unit	insertView(view: View!)
open Unit	onViewSelected(view: View!) Called when a view is bound to the object of select(Object).
open Unit	showView(view: View!, visible: Boolean)

Public constructors

<init>

PresenterSwitcher()

An abstract helper class that switches a view in its parent view using a PresenterSelector. A subclass should implement insertView(View) to define how to add the view in parent, and may optionally override onViewSelected(View).

Public methods

clear

open fun clear(): Unit

Destroys created views.

getParentViewGroup

fun getParentViewGroup(): ViewGroup!

Returns the parent.

init

open fun init(
    parent: ViewGroup!, 
    presenterSelector: PresenterSelector!
): Unit

Initializes the switcher with a parent view to insert view into and a PresenterSelector for choosing a Presenter for a given object. This will destroy any existing views.

select

open fun select(object: Any!): Unit

Selects a view based on the given object and shows that view.

unselect

open fun unselect(): Unit

Hides the view.

Protected methods

insertView

protected abstract fun insertView(view: View!): Unit

onViewSelected

protected open fun onViewSelected(view: View!): Unit

Called when a view is bound to the object of select(Object).

showView

protected open fun showView(
    view: View!, 
    visible: Boolean
): Unit