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HeadersFragment

public class HeadersFragment
extends Fragment

java.lang.Object
↳	android.app.Fragment
	↳	android.support.v17.leanback.app.HeadersFragment

An internal fragment containing a list of row headers.

Summary

Nested classes
`interface`	`HeadersFragment.OnHeaderClickedListener` Interface definition for a callback to be invoked when a header item is clicked.
`interface`	`HeadersFragment.OnHeaderViewSelectedListener` Interface definition for a callback to be invoked when a header item is selected.

Inherited XML attributes

From class


  android.app.Fragment

Inherited constants

From interface


    android.content.ComponentCallbacks2

Public constructors
`HeadersFragment()`

Public methods
`final ObjectAdapter`	`getAdapter()` Returns the list of rows.
`final PresenterSelector`	`getPresenterSelector()` Get the presenter selector used to create and bind views.
`int`	`getSelectedPosition()` Gets position of currently selected row.
`boolean`	`isScrolling()`
`View`	`onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)` Called to have the fragment instantiate its user interface view.
`void`	`onDestroyView()` Called when the view previously created by `onCreateView(LayoutInflater, ViewGroup, Bundle)` has been detached from the fragment.
`void`	`onSaveInstanceState(Bundle outState)` Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance of its process is restarted.
`void`	`onTransitionEnd()`
`boolean`	`onTransitionPrepare()`
`void`	`onTransitionStart()`
`void`	`onViewCreated(View view, Bundle savedInstanceState)` Called immediately after `onCreateView(LayoutInflater, ViewGroup, Bundle)` has returned, but before any saved state has been restored in to the view.
`final void`	`setAdapter(ObjectAdapter rowsAdapter)` Sets the adapter for the fragment.
`void`	`setAlignment(int windowAlignOffsetTop)`
`void`	`setOnHeaderClickedListener(HeadersFragment.OnHeaderClickedListener listener)`
`void`	`setOnHeaderViewSelectedListener(HeadersFragment.OnHeaderViewSelectedListener listener)`
`final void`	`setPresenterSelector(PresenterSelector presenterSelector)` Set the presenter selector used to create and bind views.
`void`	`setSelectedPosition(int position)` Sets the selected row position with smooth animation.
`void`	`setSelectedPosition(int position, boolean smooth)` Sets the selected row position.

Inherited methods

From class


  
    android.app.Fragment

`void`	`dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args)` Print the Fragments's state into the given stream.
`final boolean`	`equals(Object o)` Subclasses can not override equals().
`final Activity`	`getActivity()` Return the Activity this fragment is currently associated with.
`boolean`	`getAllowEnterTransitionOverlap()` Returns whether the the exit transition and enter transition overlap or not.
`boolean`	`getAllowReturnTransitionOverlap()` Returns whether the the return transition and reenter transition overlap or not.
`final Bundle`	`getArguments()` Return the arguments supplied to `setArguments(Bundle)`, if any.
`final FragmentManager`	`getChildFragmentManager()` Return a private FragmentManager for placing and managing Fragments inside of this Fragment.
`Context`	`getContext()` Return the `Context` this fragment is currently associated with.
`Transition`	`getEnterTransition()` Returns the Transition that will be used to move Views into the initial scene.
`Transition`	`getExitTransition()` Returns the Transition that will be used to move Views out of the scene when the fragment is removed, hidden, or detached when not popping the back stack.
`final FragmentManager`	`getFragmentManager()` Return the FragmentManager for interacting with fragments associated with this fragment's activity.
`final Object`	`getHost()` Return the host object of this fragment.
`final int`	`getId()` Return the identifier this fragment is known by.
`LoaderManager`	`getLoaderManager()` Return the LoaderManager for this fragment, creating it if needed.
`final Fragment`	`getParentFragment()` Returns the parent Fragment containing this Fragment.
`Transition`	`getReenterTransition()` Returns the Transition that will be used to move Views in to the scene when returning due to popping a back stack.
`final Resources`	`getResources()` Return `getActivity().getResources()`.
`final boolean`	`getRetainInstance()`
`Transition`	`getReturnTransition()` Returns the Transition that will be used to move Views out of the scene when the Fragment is preparing to be removed, hidden, or detached because of popping the back stack.
`Transition`	`getSharedElementEnterTransition()` Returns the Transition that will be used for shared elements transferred into the content Scene.
`Transition`	`getSharedElementReturnTransition()` Return the Transition that will be used for shared elements transferred back during a pop of the back stack.
`final String`	`getString(int resId, Object... formatArgs)` Return a localized formatted string from the application's package's default string table, substituting the format arguments as defined in `Formatter` and `format(String, Object...)`.
`final String`	`getString(int resId)` Return a localized string from the application's package's default string table.
`final String`	`getTag()` Get the tag name of the fragment, if specified.
`final Fragment`	`getTargetFragment()` Return the target fragment set by `setTargetFragment(Fragment, int)`.
`final int`	`getTargetRequestCode()` Return the target request code set by `setTargetFragment(Fragment, int)`.
`final CharSequence`	`getText(int resId)` Return a localized, styled CharSequence from the application's package's default string table.
`boolean`	`getUserVisibleHint()`
`View`	`getView()` Get the root view for the fragment's layout (the one returned by `onCreateView(LayoutInflater, ViewGroup, Bundle)`), if provided.
`final int`	`hashCode()` Subclasses can not override hashCode().
`static Fragment`	`instantiate(Context context, String fname)` Like `instantiate(Context, String, Bundle)` but with a null argument Bundle.
`static Fragment`	`instantiate(Context context, String fname, Bundle args)` Create a new instance of a Fragment with the given class name.
`final boolean`	`isAdded()` Return true if the fragment is currently added to its activity.
`final boolean`	`isDetached()` Return true if the fragment has been explicitly detached from the UI.
`final boolean`	`isHidden()` Return true if the fragment has been hidden.
`final boolean`	`isInLayout()` Return true if the layout is included as part of an activity view hierarchy via the <fragment> tag.
`final boolean`	`isRemoving()` Return true if this fragment is currently being removed from its activity.
`final boolean`	`isResumed()` Return true if the fragment is in the resumed state.
`final boolean`	`isVisible()` Return true if the fragment is currently visible to the user.
`void`	`onActivityCreated(Bundle savedInstanceState)` Called when the fragment's activity has been created and this fragment's view hierarchy instantiated.
`void`	`onActivityResult(int requestCode, int resultCode, Intent data)` Receive the result from a previous call to `startActivityForResult(Intent, int)`.
`void`	`onAttach(Activity activity)` This method was deprecated in API level 23. Use `onAttach(Context)` instead.
`void`	`onAttach(Context context)` Called when a fragment is first attached to its context.
`void`	`onAttachFragment(Fragment childFragment)` Called when a fragment is attached as a child of this fragment.
`void`	`onConfigurationChanged(Configuration newConfig)` Called by the system when the device configuration changes while your component is running.
`boolean`	`onContextItemSelected(MenuItem item)` This hook is called whenever an item in a context menu is selected.
`void`	`onCreate(Bundle savedInstanceState)` Called to do initial creation of a fragment.
`Animator`	`onCreateAnimator(int transit, boolean enter, int nextAnim)` Called when a fragment loads an animation.
`void`	`onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)` Called when a context menu for the `view` is about to be shown.
`void`	`onCreateOptionsMenu(Menu menu, MenuInflater inflater)` Initialize the contents of the Activity's standard options menu.
`View`	`onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)` Called to have the fragment instantiate its user interface view.
`void`	`onDestroy()` Called when the fragment is no longer in use.
`void`	`onDestroyOptionsMenu()` Called when this fragment's option menu items are no longer being included in the overall options menu.
`void`	`onDestroyView()` Called when the view previously created by `onCreateView(LayoutInflater, ViewGroup, Bundle)` has been detached from the fragment.
`void`	`onDetach()` Called when the fragment is no longer attached to its activity.
`void`	`onHiddenChanged(boolean hidden)` Called when the hidden state (as returned by `isHidden()` of the fragment has changed.
`void`	`onInflate(AttributeSet attrs, Bundle savedInstanceState)` This method was deprecated in API level 12. Use `onInflate(Context, AttributeSet, Bundle)` instead.
`void`	`onInflate(Activity activity, AttributeSet attrs, Bundle savedInstanceState)` This method was deprecated in API level 23. Use `onInflate(Context, AttributeSet, Bundle)` instead.
`void`	`onInflate(Context context, AttributeSet attrs, Bundle savedInstanceState)` Called when a fragment is being created as part of a view layout inflation, typically from setting the content view of an activity.
`void`	`onLowMemory()` This is called when the overall system is running low on memory, and actively running processes should trim their memory usage.
`void`	`onMultiWindowModeChanged(boolean isInMultiWindowMode)` Called when the Fragment's activity changes from fullscreen mode to multi-window mode and visa-versa.
`boolean`	`onOptionsItemSelected(MenuItem item)` This hook is called whenever an item in your options menu is selected.
`void`	`onOptionsMenuClosed(Menu menu)` This hook is called whenever the options menu is being closed (either by the user canceling the menu with the back/menu button, or when an item is selected).
`void`	`onPause()` Called when the Fragment is no longer resumed.
`void`	`onPictureInPictureModeChanged(boolean isInPictureInPictureMode)` Called by the system when the activity changes to and from picture-in-picture mode.
`void`	`onPrepareOptionsMenu(Menu menu)` Prepare the Screen's standard options menu to be displayed.
`void`	`onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)` Callback for the result from requesting permissions.
`void`	`onResume()` Called when the fragment is visible to the user and actively running.
`void`	`onSaveInstanceState(Bundle outState)` Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance of its process is restarted.
`void`	`onStart()` Called when the Fragment is visible to the user.
`void`	`onStop()` Called when the Fragment is no longer started.
`void`	`onTrimMemory(int level)` Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.
`void`	`onViewCreated(View view, Bundle savedInstanceState)` Called immediately after `onCreateView(LayoutInflater, ViewGroup, Bundle)` has returned, but before any saved state has been restored in to the view.
`void`	`onViewStateRestored(Bundle savedInstanceState)` Called when all saved state has been restored into the view hierarchy of the fragment.
`void`	`registerForContextMenu(View view)` Registers a context menu to be shown for the given view (multiple views can show the context menu).
`final void`	`requestPermissions(String[] permissions, int requestCode)` Requests permissions to be granted to this application.
`void`	`setAllowEnterTransitionOverlap(boolean allow)` Sets whether the the exit transition and enter transition overlap or not.
`void`	`setAllowReturnTransitionOverlap(boolean allow)` Sets whether the the return transition and reenter transition overlap or not.
`void`	`setArguments(Bundle args)` Supply the construction arguments for this fragment.
`void`	`setEnterSharedElementCallback(SharedElementCallback callback)` When custom transitions are used with Fragments, the enter transition callback is called when this Fragment is attached or detached when not popping the back stack.
`void`	`setEnterTransition(Transition transition)` Sets the Transition that will be used to move Views into the initial scene.
`void`	`setExitSharedElementCallback(SharedElementCallback callback)` When custom transitions are used with Fragments, the exit transition callback is called when this Fragment is attached or detached when popping the back stack.
`void`	`setExitTransition(Transition transition)` Sets the Transition that will be used to move Views out of the scene when the fragment is removed, hidden, or detached when not popping the back stack.
`void`	`setHasOptionsMenu(boolean hasMenu)` Report that this fragment would like to participate in populating the options menu by receiving a call to `onCreateOptionsMenu(Menu, MenuInflater)` and related methods.
`void`	`setInitialSavedState(Fragment.SavedState state)` Set the initial saved state that this Fragment should restore itself from when first being constructed, as returned by `FragmentManager.saveFragmentInstanceState`.
`void`	`setMenuVisibility(boolean menuVisible)` Set a hint for whether this fragment's menu should be visible.
`void`	`setReenterTransition(Transition transition)` Sets the Transition that will be used to move Views in to the scene when returning due to popping a back stack.
`void`	`setRetainInstance(boolean retain)` Control whether a fragment instance is retained across Activity re-creation (such as from a configuration change).
`void`	`setReturnTransition(Transition transition)` Sets the Transition that will be used to move Views out of the scene when the Fragment is preparing to be removed, hidden, or detached because of popping the back stack.
`void`	`setSharedElementEnterTransition(Transition transition)` Sets the Transition that will be used for shared elements transferred into the content Scene.
`void`	`setSharedElementReturnTransition(Transition transition)` Sets the Transition that will be used for shared elements transferred back during a pop of the back stack.
`void`	`setTargetFragment(Fragment fragment, int requestCode)` Optional target for this fragment.
`void`	`setUserVisibleHint(boolean isVisibleToUser)` Set a hint to the system about whether this fragment's UI is currently visible to the user.
`boolean`	`shouldShowRequestPermissionRationale(String permission)` Gets whether you should show UI with rationale for requesting a permission.
`void`	`startActivity(Intent intent)` Call `startActivity(Intent)` from the fragment's containing Activity.
`void`	`startActivity(Intent intent, Bundle options)` Call `startActivity(Intent, Bundle)` from the fragment's containing Activity.
`void`	`startActivityForResult(Intent intent, int requestCode)` Call `startActivityForResult(Intent, int)` from the fragment's containing Activity.
`void`	`startActivityForResult(Intent intent, int requestCode, Bundle options)` Call `startActivityForResult(Intent, int, Bundle)` from the fragment's containing Activity.
`void`	`startIntentSenderForResult(IntentSender intent, int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)` Call `startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)` from the fragment's containing Activity.
`String`	`toString()` Returns a string representation of the object.
`void`	`unregisterForContextMenu(View view)` Prevents a context menu to be shown for the given view.

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


  
    android.content.ComponentCallbacks2

From interface


  
    android.view.View.OnCreateContextMenuListener

From interface


  
    android.content.ComponentCallbacks

Public constructors

HeadersFragment

HeadersFragment ()

Public methods

getAdapter

ObjectAdapter getAdapter ()

Returns the list of rows.

Returns
`ObjectAdapter`

getPresenterSelector

PresenterSelector getPresenterSelector ()

Get the presenter selector used to create and bind views.

Returns
`PresenterSelector`

getSelectedPosition

int getSelectedPosition ()

Gets position of currently selected row.

Returns
`int`	Position of currently selected row.

isScrolling

boolean isScrolling ()

Returns
`boolean`

onCreateView

View onCreateView (LayoutInflater inflater, 
                ViewGroup container, 
                Bundle savedInstanceState)

Called to have the fragment instantiate its user interface view. This is optional, and non-graphical fragments can return null (which is the default implementation). This will be called between onCreate(Bundle) and onActivityCreated(Bundle).

If you return a View from here, you will later be called in onDestroyView() when the view is being released.

Parameters
`inflater`	`LayoutInflater`: The LayoutInflater object that can be used to inflate any views in the fragment,
`container`	`ViewGroup`: 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.
`savedInstanceState`	`Bundle`: If non-null, this fragment is being re-constructed from a previous saved state as given here.

Returns
`View`	Return the View for the fragment's UI, or null.

onDestroyView

void onDestroyView ()

Called when the view previously created by onCreateView(LayoutInflater, ViewGroup, Bundle) 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(LayoutInflater, ViewGroup, Bundle) 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.

onSaveInstanceState

void onSaveInstanceState (Bundle outState)

Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance of its process is restarted. If a new instance of the fragment later needs to be created, the data you place in the Bundle here will be available in the Bundle given to onCreate(Bundle), onCreateView(LayoutInflater, ViewGroup, Bundle), and onActivityCreated(Bundle).

This corresponds to Activity.onSaveInstanceState(Bundle) and most of the discussion there applies here as well. Note however: this method may be called at any time before onDestroy(). There are many situations where a fragment may be mostly torn down (such as when placed on the back stack with no UI showing), but its state will not be saved until its owning activity actually needs to save its state.

Parameters
`outState`	`Bundle`: Bundle in which to place your saved state.

onTransitionEnd

void onTransitionEnd ()

onTransitionPrepare

boolean onTransitionPrepare ()

Returns
`boolean`

onTransitionStart

void onTransitionStart ()

onViewCreated

void onViewCreated (View view, 
                Bundle savedInstanceState)

Called immediately after onCreateView(LayoutInflater, ViewGroup, Bundle) has returned, but before any saved state has been restored in to the view. This gives subclasses a chance to initialize themselves once they know their view hierarchy has been completely created. The fragment's view hierarchy is not however attached to its parent at this point.

Parameters
`view`	`View`: The View returned by `onCreateView(LayoutInflater, ViewGroup, Bundle)`.
`savedInstanceState`	`Bundle`: If non-null, this fragment is being re-constructed from a previous saved state as given here.

setAdapter

void setAdapter (ObjectAdapter rowsAdapter)

Sets the adapter for the fragment.

Parameters
`rowsAdapter`	`ObjectAdapter`

setAlignment

void setAlignment (int windowAlignOffsetTop)

Parameters
`windowAlignOffsetTop`	`int`

setOnHeaderClickedListener

void setOnHeaderClickedListener (HeadersFragment.OnHeaderClickedListener listener)

Parameters
`listener`	`HeadersFragment.OnHeaderClickedListener`

setOnHeaderViewSelectedListener

void setOnHeaderViewSelectedListener (HeadersFragment.OnHeaderViewSelectedListener listener)

Parameters
`listener`	`HeadersFragment.OnHeaderViewSelectedListener`

setPresenterSelector

void setPresenterSelector (PresenterSelector presenterSelector)

Set the presenter selector used to create and bind views.

Parameters
`presenterSelector`	`PresenterSelector`

setSelectedPosition

void setSelectedPosition (int position)

Sets the selected row position with smooth animation.

Parameters
`position`	`int`

setSelectedPosition

void setSelectedPosition (int position, 
                boolean smooth)

Sets the selected row position.

Parameters
`position`	`int`
`smooth`	`boolean`

Most visited

Recently visited

Results for

HeadersFragment

Summary

Nested classes

Inherited XML attributes

Inherited constants

Public constructors

Public methods

Inherited methods

Public constructors

HeadersFragment

Public methods

getAdapter

getPresenterSelector

getSelectedPosition

isScrolling

onCreateView

onDestroyView

onSaveInstanceState

onTransitionEnd

onTransitionPrepare

onTransitionStart

onViewCreated

setAdapter

setAlignment

setOnHeaderClickedListener

setOnHeaderViewSelectedListener

setPresenterSelector

setSelectedPosition

setSelectedPosition