VerticalGridFragment

Kotlin |Java

open class VerticalGridFragment : BaseFragment

kotlin.Any
↳	android.app.Fragment
	↳	androidx.leanback.app.BrandedFragment
		↳	androidx.leanback.app.BaseFragment
			↳	androidx.leanback.app.VerticalGridFragment

A fragment for creating leanback vertical grids.

Renders a vertical grid of objects given a VerticalGridPresenter and an ObjectAdapter.

Summary

Public constructors
`<init>()` A fragment for creating leanback vertical grids.

Public methods
open ObjectAdapter!	`getAdapter()` Returns the object adapter.
open VerticalGridPresenter!	`getGridPresenter()` Returns the grid presenter.
open OnItemViewClickedListener!	`getOnItemViewClickedListener()` Returns the item clicked listener.
open View?	`onCreateView(inflater: LayoutInflater!, container: ViewGroup?, savedInstanceState: Bundle!)`
open Unit	`onDestroyView()`
open Unit	`onStart()`
open Unit	`setAdapter(adapter: ObjectAdapter!)` Sets the object adapter for the fragment.
open Unit	`setGridPresenter(gridPresenter: VerticalGridPresenter!)` Sets the grid presenter.
open Unit	`setOnItemViewClickedListener(listener: OnItemViewClickedListener!)` Sets an item clicked listener.
open Unit	`setOnItemViewSelectedListener(listener: OnItemViewSelectedListener!)` Sets an item selection listener.
open Unit	`setSelectedPosition(position: Int)` Sets the selected item position.

Protected methods
open Any!	`createEntranceTransition()`
open Unit	`runEntranceTransition(entranceTransition: Any!)`

Inherited functions

From class BrandedFragment

`Drawable!`	`getBadgeDrawable()` Returns the badge drawable used in the fragment title.
`Int`	`getSearchAffordanceColor()` Returns the color used to draw the search affordance.
`SearchOrbView.Colors!`	`getSearchAffordanceColors()` Returns the `androidx.leanback.widget.SearchOrbView.Colors` used to draw the search affordance.
`CharSequence!`	`getTitle()` Returns the title text for the fragment.
`View!`	`getTitleView()` Returns the view that implements `TitleViewAdapter.Provider`.
`TitleViewAdapter!`	`getTitleViewAdapter()` Returns the `TitleViewAdapter` implemented by title view.
`Unit`	`installTitleView(inflater: LayoutInflater!, parent: ViewGroup!, savedInstanceState: Bundle!)` Inflate title view and add to parent. This method should be called in `Fragment#onCreateView(LayoutInflater, ViewGroup, Bundle)`.
`Boolean`	`isShowingTitle()` Returns true/false to indicate the visibility of TitleView.
`View!`	`onInflateTitleView(inflater: LayoutInflater!, parent: ViewGroup!, savedInstanceState: Bundle!)` Called by `installTitleView(LayoutInflater, ViewGroup, Bundle)` to inflate title view. Default implementation uses layout file lb_browse_title. Subclass may override and use its own layout, the layout must have a descendant with id browse_title_group that implements `TitleViewAdapter.Provider`. Subclass may return null if no title is needed.
`Unit`	`onPause()`
`Unit`	`onResume()`
`Unit`	`onSaveInstanceState(outState: Bundle!)`
`Unit`	`onStart()`
`Unit`	`setBadgeDrawable(drawable: Drawable!)` Sets the drawable displayed in the fragment title.
`Unit`	`setOnSearchClickedListener(listener: OnClickListener!)` Sets a click listener for the search affordance. The presence of a listener will change the visibility of the search affordance in the fragment title. When set to non-null, the title will contain an element that a user may click to begin a search. The listener's `onClick` method will be invoked when the user clicks on the search element.
`Unit`	`setSearchAffordanceColor(color: Int)` Sets the color used to draw the search affordance. A default brighter color will be set by the framework.
`Unit`	`setSearchAffordanceColors(colors: SearchOrbView.Colors!)` Sets the `androidx.leanback.widget.SearchOrbView.Colors` used to draw the search affordance.
`Unit`	`setTitle(title: CharSequence!)` Sets title text for the fragment.
`Unit`	`setTitleView(titleView: View!)` Sets the view that implemented `TitleViewAdapter`.
`Unit`	`showTitle(show: Boolean)` Shows or hides the title view.
`Unit`	`showTitle(flags: Int)` Changes title view's components visibility and shows title.

From class BaseFragment

`ProgressBarManager!`	`getProgressBarManager()` Returns the `ProgressBarManager`.
`Unit`	`onCreate(savedInstanceState: Bundle?)`
`Unit`	`onEntranceTransitionEnd()` Callback when entrance transition is ended.
`Unit`	`onEntranceTransitionPrepare()` Callback when entrance transition is prepared. This is when fragment should stop user input and animations.
`Unit`	`onEntranceTransitionStart()` Callback when entrance transition is started. This is when fragment should stop processing layout.
`Unit`	`onViewCreated(@NonNull view: View, @Nullable savedInstanceState: Bundle?)`
`Unit`	`prepareEntranceTransition()` Enables entrance transition. Entrance transition is the standard slide-in transition that shows rows of data in browse screen and details screen. The method is ignored before LOLLIPOP (API21). This method must be called in or before onCreate(). Typically entrance transition should be enabled when savedInstance is null so that fragment restored from instanceState does not run an extra entrance transition. When the entrance transition is enabled, the fragment will make headers and content hidden initially. When data of rows are ready, app must call `startEntranceTransition()` to kick off the transition, otherwise the rows will be invisible forever. It is similar to android:windowsEnterTransition and can be considered a late-executed android:windowsEnterTransition controlled by app. There are two reasons that app needs it: Workaround the problem that activity transition is not available between launcher and app. Browse activity must programmatically start the slide-in transition. Separates DetailsOverviewRow transition from other rows transition. So that the DetailsOverviewRow transition can be executed earlier without waiting for all rows to be loaded. Transition object is returned by createEntranceTransition(). Typically the app does not need override the default transition that browse and details provides.
`Unit`	`startEntranceTransition()` When fragment finishes loading data, it should call startEntranceTransition() to execute the entrance transition. startEntranceTransition() will start transition only if both two conditions are satisfied: prepareEntranceTransition() was called. has not executed entrance transition yet. If startEntranceTransition() is called before onViewCreated(), it will be pending and executed when view is created.

Public constructors

<init>

VerticalGridFragment()

Deprecated: use VerticalGridSupportFragment

A fragment for creating leanback vertical grids.

Renders a vertical grid of objects given a VerticalGridPresenter and an ObjectAdapter.

Public methods

getAdapter

open fun getAdapter(): ObjectAdapter!

Returns the object adapter.

getGridPresenter

open fun getGridPresenter(): VerticalGridPresenter!

Returns the grid presenter.

getOnItemViewClickedListener

open fun getOnItemViewClickedListener(): OnItemViewClickedListener!

Returns the item clicked listener.

onCreateView

open fun onCreateView(
    inflater: LayoutInflater!, 
    container: ViewGroup?, 
    savedInstanceState: Bundle!
): View?

onDestroyView

open fun onDestroyView(): Unit

onStart

open fun onStart(): Unit

setAdapter

open fun setAdapter(adapter: ObjectAdapter!): Unit

Sets the object adapter for the fragment.

setGridPresenter

open fun setGridPresenter(gridPresenter: VerticalGridPresenter!): Unit

Sets the grid presenter.

setOnItemViewClickedListener

open fun setOnItemViewClickedListener(listener: OnItemViewClickedListener!): Unit

Sets an item clicked listener.

setOnItemViewSelectedListener

open fun setOnItemViewSelectedListener(listener: OnItemViewSelectedListener!): Unit

Sets an item selection listener.

setSelectedPosition

open fun setSelectedPosition(position: Int): Unit

Sets the selected item position.

Protected methods

createEntranceTransition

protected open fun createEntranceTransition(): Any!

runEntranceTransition

protected open fun runEntranceTransition(entranceTransition: Any!): Unit