DetailsSupportFragment
public class DetailsSupportFragment extends BaseSupportFragment
| java.lang.Object | ||||
| ↳ | androidx.fragment.app.Fragment | |||
| ↳ | androidx.leanback.app.BrandedSupportFragment | |||
| ↳ | androidx.leanback.app.BaseSupportFragment | |||
| ↳ | androidx.leanback.app.DetailsSupportFragment |
A fragment for creating Leanback details screens.
A DetailsSupportFragment renders the elements of its ObjectAdapter as a set of rows in a vertical list.The Adapter's PresenterSelector must maintain subclasses of RowPresenter.
FullWidthDetailsOverviewRowPresenter is found in adapter, DetailsSupportFragment will setup default behavior of the DetailsOverviewRow:
- The alignment of FullWidthDetailsOverviewRowPresenter is setup in
setupDetailsOverviewRowPresenter. - The view status switching of FullWidthDetailsOverviewRowPresenter is done in
onSetDetailsOverviewRowStatus.
The recommended activity themes to use with a DetailsSupportFragment are
Theme_Leanback_Detailswith activity shared element transition forFullWidthDetailsOverviewRowPresenter.Theme_Leanback_Details_NoSharedElementTransitionif shared element transition is not needed, for example if first row is not rendered byFullWidthDetailsOverviewRowPresenter.
DetailsSupportFragment can use DetailsSupportFragmentBackgroundController to add a parallax drawable background and embedded video playing fragment.
Summary
Public constructors |
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Public methods |
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ObjectAdapter |
Returns the list of rows. |
BaseOnItemViewClickedListener |
Returns the item clicked listener. |
DetailsParallax |
Returns the |
RowsSupportFragment |
Gets embedded RowsSupportFragment showing multiple rows for DetailsSupportFragment. |
void |
Called to do initial creation of a fragment. |
@Nullable View |
onCreateView(Called to have the fragment instantiate its user interface view. |
void |
Called when the view previously created by |
@NonNull View |
onInflateTitleView(Called by |
void |
onStart()Called when the Fragment is visible to the user. |
void |
onStop()Called when the Fragment is no longer started. |
void |
setAdapter(ObjectAdapter adapter)Sets the list of rows for the fragment. |
void |
Sets an item clicked listener. |
void |
Sets an item selection listener. |
void |
setSelectedPosition(int position)Sets the selected row position with smooth animation. |
void |
setSelectedPosition(int position, boolean smooth)Sets the selected row position. |
Protected methods |
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Object |
Create entrance transition. |
View |
This method is deprecated. override |
void |
Callback when entrance transition is ended. |
void |
Callback when entrance transition is prepared. |
void |
Callback when entrance transition is started. |
void |
onSetDetailsOverviewRowStatus(Called to change DetailsOverviewRow view status when current selected row position or selected sub position changed. |
void |
onSetRowStatus(Called on every visible row to change view status when current selected row position or selected sub position changed. |
void |
runEntranceTransition(Object entranceTransition)Run entrance transition. |
void |
Called to setup |
void |
setupPresenter(Presenter rowPresenter)Called to setup each Presenter of Adapter passed in |
Inherited methods |
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Public constructors
Public methods
getOnItemViewClickedListener
public BaseOnItemViewClickedListener getOnItemViewClickedListener()
Returns the item clicked listener.
getParallax
public DetailsParallax getParallax()
Returns the DetailsParallax instance used by DetailsSupportFragmentBackgroundController to configure parallax effect of background and control embedded video playback. App usually does not use this method directly. App may use this method for other custom parallax tasks.
| Returns | |
|---|---|
DetailsParallax |
The DetailsParallax instance attached to the DetailsSupportFragment. |
getRowsSupportFragment
public RowsSupportFragment getRowsSupportFragment()
Gets embedded RowsSupportFragment showing multiple rows for DetailsSupportFragment. If view of DetailsSupportFragment is not created, the method returns null.
| Returns | |
|---|---|
RowsSupportFragment |
Embedded RowsSupportFragment showing multiple rows for DetailsSupportFragment. |
onCreate
public void onCreate(Bundle savedInstanceState)
Called to do initial creation of a fragment. This is called after onAttach and before onCreateView.
Note that this can be called while the fragment's activity is still in the process of being created. As such, you can not rely on things like the activity's content view hierarchy being initialized at this point. If you want to do work once the activity itself is created, add a androidx.lifecycle.LifecycleObserver on the activity's Lifecycle, removing it when it receives the CREATED callback.
Any restored child fragments will be created before the base Fragment.onCreate method returns.
| Parameters | |
|---|---|
Bundle savedInstanceState |
If the fragment is being re-created from a previous saved state, this is the state. |
onCreateView
public @Nullable View onCreateView(
@NonNull LayoutInflater inflater,
@Nullable ViewGroup container,
@Nullable Bundle savedInstanceState
)
Called to have the fragment instantiate its user interface view. This is optional, and non-graphical fragments can return null. This will be called between onCreate and onViewCreated.
A default View can be returned by calling Fragment in your constructor. Otherwise, this method returns null.
It is recommended to only inflate the layout in this method and move logic that operates on the returned View to onViewCreated.
If you return a View from here, you will later be called in onDestroyView when the view is being released.
| Parameters | |
|---|---|
@NonNull LayoutInflater inflater |
The LayoutInflater object that can be used to inflate any views in the fragment, |
@Nullable ViewGroup container |
If non-null, this is the parent view that the fragment's UI should be attached to. The fragment should not add the view itself, but this can be used to generate the LayoutParams of the view. |
@Nullable Bundle savedInstanceState |
If non-null, this fragment is being re-constructed from a previous saved state as given here. |
onDestroyView
public void onDestroyView()
Called when the view previously created by onCreateView has been detached from the fragment. The next time the fragment needs to be displayed, a new view will be created. This is called after onStop and before onDestroy. It is called regardless of whether onCreateView returned a non-null view. Internally it is called after the view's state has been saved but before it has been removed from its parent.
onInflateTitleView
public @NonNull View onInflateTitleView(
@NonNull LayoutInflater inflater,
@Nullable ViewGroup parent,
@Nullable Bundle savedInstanceState
)
Called by installTitleView 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.
| Parameters | |
|---|---|
@NonNull LayoutInflater inflater |
The LayoutInflater object that can be used to inflate any views in the fragment, |
@Nullable ViewGroup parent |
Parent of title view. |
@Nullable Bundle savedInstanceState |
If non-null, this fragment is being re-constructed from a previous saved state as given here. |
| Returns | |
|---|---|
@NonNull View |
Title view which must have a descendant with id browse_title_group that implements |
onStart
public void onStart()
Called when the Fragment is visible to the user. This is generally tied to Activity.onStart of the containing Activity's lifecycle.
onStop
public void onStop()
Called when the Fragment is no longer started. This is generally tied to Activity.onStop of the containing Activity's lifecycle.
setAdapter
public void setAdapter(ObjectAdapter adapter)
Sets the list of rows for the fragment.
setOnItemViewClickedListener
public void setOnItemViewClickedListener(BaseOnItemViewClickedListener listener)
Sets an item clicked listener.
setOnItemViewSelectedListener
public void setOnItemViewSelectedListener(BaseOnItemViewSelectedListener listener)
Sets an item selection listener.
setSelectedPosition
public void setSelectedPosition(int position)
Sets the selected row position with smooth animation.
setSelectedPosition
public void setSelectedPosition(int position, boolean smooth)
Sets the selected row position.
Protected methods
createEntranceTransition
protected Object createEntranceTransition()
Create entrance transition. Subclass can override to load transition from resource or construct manually. Typically app does not need to override the default transition that browse and details provides.
onEntranceTransitionEnd
protected void onEntranceTransitionEnd()
Callback when entrance transition is ended.
onEntranceTransitionPrepare
protected void onEntranceTransitionPrepare()
Callback when entrance transition is prepared. This is when fragment should stop user input and animations.
onEntranceTransitionStart
protected void onEntranceTransitionStart()
Callback when entrance transition is started. This is when fragment should stop processing layout.
onSetDetailsOverviewRowStatus
protected void onSetDetailsOverviewRowStatus(
FullWidthDetailsOverviewRowPresenter presenter,
FullWidthDetailsOverviewRowPresenter.ViewHolder viewHolder,
int adapterPosition,
int selectedPosition,
int selectedSubPosition
)
Called to change DetailsOverviewRow view status when current selected row position or selected sub position changed. Subclass may override. The default implementation switches between three states based on the positions: STATE_HALF, STATE_FULL and STATE_SMALL.
| Parameters | |
|---|---|
FullWidthDetailsOverviewRowPresenter presenter |
The presenter used to create row ViewHolder. |
FullWidthDetailsOverviewRowPresenter.ViewHolder viewHolder |
The visible (attached) row ViewHolder, note that it may or may not be selected. |
int adapterPosition |
The adapter position of viewHolder inside adapter. |
int selectedPosition |
The adapter position of currently selected row. |
int selectedSubPosition |
The sub position within currently selected row. This is used When a row has multiple alignment positions. |
onSetRowStatus
protected void onSetRowStatus(
RowPresenter presenter,
RowPresenter.ViewHolder viewHolder,
int adapterPosition,
int selectedPosition,
int selectedSubPosition
)
Called on every visible row to change view status when current selected row position or selected sub position changed. Subclass may override. The default implementation calls onSetDetailsOverviewRowStatus if presenter is instance of FullWidthDetailsOverviewRowPresenter.
| Parameters | |
|---|---|
RowPresenter presenter |
The presenter used to create row ViewHolder. |
RowPresenter.ViewHolder viewHolder |
The visible (attached) row ViewHolder, note that it may or may not be selected. |
int adapterPosition |
The adapter position of viewHolder inside adapter. |
int selectedPosition |
The adapter position of currently selected row. |
int selectedSubPosition |
The sub position within currently selected row. This is used When a row has multiple alignment positions. |
runEntranceTransition
protected void runEntranceTransition(Object entranceTransition)
Run entrance transition. Subclass may use TransitionManager to perform go(Scene) or beginDelayedTransition(). App should not override the default implementation of browse and details fragment.
setupDetailsOverviewRowPresenter
protected void setupDetailsOverviewRowPresenter(
FullWidthDetailsOverviewRowPresenter presenter
)
Called to setup FullWidthDetailsOverviewRowPresenter. The default implementation adds two alignment positions(ItemAlignmentFacet) for ViewHolder of FullWidthDetailsOverviewRowPresenter to align in fragment.
setupPresenter
protected void setupPresenter(Presenter rowPresenter)
Called to setup each Presenter of Adapter passed in setAdapter.Note that setup should only change the Presenter behavior that is meaningful in DetailsSupportFragment. For example how a row is aligned in details Fragment. The default implementation invokes setupDetailsOverviewRowPresenter