RowsSupportFragment

Kotlin |Java

open class RowsSupportFragment : BaseRowSupportFragment, BrowseSupportFragment.MainFragmentRowsAdapterProvider, BrowseSupportFragment.MainFragmentAdapterProvider

androidx.leanback.app.RowsSupportFragment

An ordered set of rows of leanback widgets.

A RowsSupportFragment renders the elements of its androidx.leanback.widget.ObjectAdapter as a set of rows in a vertical list. The Adapter's PresenterSelector must maintain subclasses of RowPresenter.

Summary

Nested classes
open	MainFragmentAdapter
open	MainFragmentRowsAdapter The adapter that RowsSupportFragment implements BrowseSupportFragment.

Public constructors
<init>() An ordered set of rows of leanback widgets.

Public methods
open Unit	enableRowScaling(enable: Boolean)
open RowPresenter.ViewHolder!	findRowViewHolderByPosition(position: Int) Find row ViewHolder by position in adapter.
open BrowseSupportFragment.MainFragmentAdapter<Fragment!>!	getMainFragmentAdapter()
open BrowseSupportFragment.MainFragmentRowsAdapter<Fragment!>!	getMainFragmentRowsAdapter()
open BaseOnItemViewClickedListener<Any!>!	getOnItemViewClickedListener() Returns the item clicked listener.
open BaseOnItemViewSelectedListener<Any!>!	getOnItemViewSelectedListener() Returns an item selection listener.
open RowPresenter.ViewHolder!	getRowViewHolder(position: Int) Get row ViewHolder at adapter position.
open Boolean	isScrolling()
open Unit	onDestroyView()
open Unit	onTransitionEnd()
open Boolean	onTransitionPrepare()
open Unit	onViewCreated(@NonNull view: View, @Nullable savedInstanceState: Bundle?)
open Unit	setAlignment(windowAlignOffsetFromTop: Int)
open Unit	setEntranceTransitionState(afterTransition: Boolean) For rows that willing to participate entrance transition, this function hide views if afterTransition is true, show views if afterTransition is false.
open Unit	setExpand(expand: Boolean) Set the visibility of titles/hovercard of browse rows.
open Unit	setOnItemViewClickedListener(listener: BaseOnItemViewClickedListener<Any!>!) Sets an item clicked listener on the fragment.
open Unit	setOnItemViewSelectedListener(listener: BaseOnItemViewSelectedListener<Any!>!) Sets an item selection listener.
open Unit	setSelectedPosition(rowPosition: Int, smooth: Boolean, rowHolderTask: Presenter.ViewHolderTask!) Selects a Row and perform an optional task on the Row.

Protected methods
open VerticalGridView!	findGridViewFromRoot(view: View!)

Public constructors

<init>

RowsSupportFragment()

An ordered set of rows of leanback widgets.

A RowsSupportFragment renders the elements of its androidx.leanback.widget.ObjectAdapter as a set of rows in a vertical list. The Adapter's PresenterSelector must maintain subclasses of RowPresenter.

Public methods

enableRowScaling

open fun enableRowScaling(enable: Boolean): Unit

Deprecated: use BrowseSupportFragment#enableRowScaling(boolean) instead.

Parameters
enable	Boolean: true to enable row scaling

findRowViewHolderByPosition

open fun findRowViewHolderByPosition(position: Int): RowPresenter.ViewHolder!

Find row ViewHolder by position in adapter.

Parameters
position	Int: Position of row.

Return
RowPresenter.ViewHolder!	ViewHolder of Row.

getMainFragmentAdapter

open fun getMainFragmentAdapter(): BrowseSupportFragment.MainFragmentAdapter<Fragment!>!

getMainFragmentRowsAdapter

open fun getMainFragmentRowsAdapter(): BrowseSupportFragment.MainFragmentRowsAdapter<Fragment!>!

getOnItemViewClickedListener

open fun getOnItemViewClickedListener(): BaseOnItemViewClickedListener<Any!>!

Returns the item clicked listener.

getOnItemViewSelectedListener

open fun getOnItemViewSelectedListener(): BaseOnItemViewSelectedListener<Any!>!

Returns an item selection listener.

getRowViewHolder

open fun getRowViewHolder(position: Int): RowPresenter.ViewHolder!

Get row ViewHolder at adapter position. Returns null if the row object is not in adapter or the row object has not been bound to a row view.

Parameters
position	Int: Position of row in adapter.

Return
RowPresenter.ViewHolder!	Row ViewHolder at a given adapter position.

isScrolling

open fun isScrolling(): Boolean

onDestroyView

open fun onDestroyView(): Unit

onTransitionEnd

open fun onTransitionEnd(): Unit

onTransitionPrepare

open fun onTransitionPrepare(): Boolean

onViewCreated

open fun onViewCreated(
    @NonNull view: View, 
    @Nullable savedInstanceState: Bundle?
): Unit

setAlignment

open fun setAlignment(windowAlignOffsetFromTop: Int): Unit

setEntranceTransitionState

open fun setEntranceTransitionState(afterTransition: Boolean): Unit

For rows that willing to participate entrance transition, this function hide views if afterTransition is true, show views if afterTransition is false.

setExpand

open fun setExpand(expand: Boolean): Unit

Set the visibility of titles/hovercard of browse rows.

setOnItemViewClickedListener

open fun setOnItemViewClickedListener(listener: BaseOnItemViewClickedListener<Any!>!): Unit

Sets an item clicked listener on the fragment. OnItemViewClickedListener will override View.OnClickListener that item presenter sets during Presenter#onCreateViewHolder(ViewGroup). So in general, developer should choose one of the listeners but not both.

setOnItemViewSelectedListener

open fun setOnItemViewSelectedListener(listener: BaseOnItemViewSelectedListener<Any!>!): Unit

Sets an item selection listener.

setSelectedPosition

open fun setSelectedPosition(
    rowPosition: Int, 
    smooth: Boolean, 
    rowHolderTask: Presenter.ViewHolderTask!