HeadersSupportFragment


public class HeadersSupportFragment extends Fragment


An fragment containing a list of row headers. Implementation must support three types of rows:

Use setPresenterSelector in subclass constructor to customize Presenters. App may override onCreateHeadersSupportFragment.

Summary

Nested types

Interface definition for a callback to be invoked when a header item is clicked.

Interface definition for a callback to be invoked when a header item is selected.

Public constructors

Public methods

final ObjectAdapter

Returns the Adapter that represents list of rows.

final ItemBridgeAdapter

Returns the RecyclerView.Adapter that wraps getAdapter.

final PresenterSelector

Get the presenter selector used to create and bind views.

int

Gets position of currently selected row.

final VerticalGridView
boolean
@Nullable View
onCreateView(
    @NonNull LayoutInflater inflater,
    @Nullable ViewGroup container,
    @Nullable Bundle savedInstanceState
)

Called to have the fragment instantiate its user interface view.

void

Called when the view previously created by onCreateView has been detached from the fragment.

void

Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance if its process is restarted.

void
boolean
void
void
onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState)

Called immediately after onCreateView has returned, but before any saved state has been restored in to the view.

final void

Sets the adapter that represents a list of rows.

void
setAlignment(int windowAlignOffsetTop)
void
void
final void

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 androidx.activity.result.ActivityResultCaller
abstract ActivityResultLauncher<I>
<I, O> registerForActivityResult(
    ActivityResultContract<I, O> contract,
    ActivityResultCallback<O> callback
)

Register a request to start an activity for result, designated by the given contract.

From android.content.ComponentCallbacks
abstract void
abstract void
From androidx.fragment.app.Fragment
void
dump(
    @NonNull String prefix,
    @Nullable FileDescriptor fd,
    @NonNull PrintWriter writer,
    @Nullable String[] args
)

Print the Fragments's state into the given stream.

final boolean

Subclasses can not override equals().

final @Nullable FragmentActivity

Return the FragmentActivity this fragment is currently associated with.

boolean

Returns whether the the exit transition and enter transition overlap or not.

boolean

Returns whether the the return transition and reenter transition overlap or not.

final @Nullable Bundle

Return the arguments supplied when the fragment was instantiated, if any.

final @NonNull FragmentManager

Return a private FragmentManager for placing and managing Fragments inside of this Fragment.

@Nullable Context

Return the Context this fragment is currently associated with.

@NonNull CreationExtras

The Fragment's arguments when this is first called will be used as the defaults to any androidx.lifecycle.SavedStateHandle passed to a view model created using this extra.

@NonNull ViewModelProvider.Factory
@Nullable Object

Returns the Transition that will be used to move Views into the initial scene.

@Nullable Object

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 @Nullable FragmentManager

This method is deprecated.

This has been removed in favor of getParentFragmentManager() which throws an IllegalStateException if the FragmentManager is null.

final @Nullable Object

Return the host object of this fragment.

final int

Return the identifier this fragment is known by.

final @NonNull LayoutInflater

Returns the cached LayoutInflater used to inflate Views of this Fragment.

@NonNull Lifecycle

Overriding this method is no longer supported and this method will be made final in a future version of Fragment.

@NonNull LoaderManager

This method is deprecated.

Use LoaderManager.getInstance(this).

final @Nullable Fragment

Returns the parent Fragment containing this Fragment.

final @NonNull FragmentManager

Return the FragmentManager for interacting with fragments associated with this fragment's activity.

@Nullable Object

Returns the Transition that will be used to move Views in to the scene when returning due to popping a back stack.

final @NonNull Resources

Return requireActivity().getResources().

final boolean

This method is deprecated.

Instead of retaining the Fragment itself, use a non-retained Fragment and keep retained state in a ViewModel attached to that Fragment.

@Nullable Object

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.

final @NonNull SavedStateRegistry
@Nullable Object

Returns the Transition that will be used for shared elements transferred into the content Scene.

@Nullable Object

Return the Transition that will be used for shared elements transferred back during a pop of the back stack.

final @NonNull String
getString(@StringRes int resId)

Return a localized string from the application's package's default string table.

final @NonNull String
getString(@StringRes int resId, @Nullable Object[] formatArgs)

Return a localized formatted string from the application's package's default string table, substituting the format arguments as defined in java.util.Formatter and format.

final @Nullable String

Get the tag name of the fragment, if specified.

final @Nullable Fragment

This method is deprecated.

Instead of using a target fragment to pass results, use setFragmentResult to deliver results to FragmentResultListener instances registered by other fragments via setFragmentResultListener.

final int

This method is deprecated.

When using the target fragment replacement of setFragmentResultListener and setFragmentResult, consider using setArguments to pass a requestKey if you need to support dynamic request keys.

final @NonNull CharSequence
getText(@StringRes int resId)

Return a localized, styled CharSequence from the application's package's default string table.

boolean

This method is deprecated.

Use setMaxLifecycle instead.

@Nullable View

Get the root view for the fragment's layout (the one returned by onCreateView), if provided.

@NonNull LifecycleOwner

Get a LifecycleOwner that represents the Fragment's View lifecycle.

@NonNull LiveData<LifecycleOwner>

Retrieve a LiveData which allows you to observe the lifecycle of the Fragment's View.

@NonNull ViewModelStore

Returns the ViewModelStore associated with this Fragment

final int

Subclasses can not override hashCode().

static @NonNull Fragment

This method is deprecated.

Use getFragmentFactory and instantiate

static @NonNull Fragment
instantiate(
    @NonNull Context context,
    @NonNull String fname,
    @Nullable Bundle args
)

This method is deprecated.

Use getFragmentFactory and instantiate, manually calling setArguments on the returned Fragment.

final boolean

Return true if the fragment is currently added to its activity.

final boolean

Return true if the fragment has been explicitly detached from the UI.

final boolean

Return true if the fragment has been hidden.

final boolean

Return true if the layout is included as part of an activity view hierarchy via the tag.

final boolean

Return true if this fragment is currently being removed from its activity.

final boolean

Return true if the fragment is in the resumed state.

final boolean

Returns true if this fragment is added and its state has already been saved by its host.

final boolean

Return true if the fragment is currently visible to the user.

void

This method is deprecated.

use onViewCreated for code touching the view created by onCreateView and onCreate for other initialization.

void
onActivityResult(int requestCode, int resultCode, @Nullable Intent data)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

void

This method is deprecated.

See onAttach.

void

Called when a fragment is first attached to its context.

void

This method is deprecated.

The responsibility for listening for fragments being attached has been moved to FragmentManager.

void
boolean

This hook is called whenever an item in a context menu is selected.

void

Called to do initial creation of a fragment.

@Nullable Animation
@MainThread
onCreateAnimation(int transit, boolean enter, int nextAnim)

Called when a fragment loads an animation.

@Nullable Animator
@MainThread
onCreateAnimator(int transit, boolean enter, int nextAnim)

Called when a fragment loads an animator.

void

Called when a context menu for the view is about to be shown.

void

This method is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

void

Called when the fragment is no longer in use.

void

This method is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

void

Called when the fragment is no longer attached to its activity.

@NonNull LayoutInflater
onGetLayoutInflater(@Nullable Bundle savedInstanceState)

Returns the LayoutInflater used to inflate Views of this Fragment.

void
@MainThread
onHiddenChanged(boolean hidden)

Called when the hidden state (as returned by isHidden of the fragment or another fragment in its hierarchy has changed.

void
@UiThread
@CallSuper
onInflate(
    @NonNull Activity activity,
    @NonNull AttributeSet attrs,
    @Nullable Bundle savedInstanceState
)

This method is deprecated.

See onInflate.

void
@UiThread
@CallSuper
onInflate(
    @NonNull Context context,
    @NonNull AttributeSet attrs,
    @Nullable 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
void
onMultiWindowModeChanged(boolean isInMultiWindowMode)

Called when the Fragment's activity changes from fullscreen mode to multi-window mode and visa-versa.

boolean

This method is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

void

This method is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

void

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

This method is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

void
@MainThread
onPrimaryNavigationFragmentChanged(
    boolean isPrimaryNavigationFragment
)

Callback for when the primary navigation state of this Fragment has changed.

void
onRequestPermissionsResult(
    int requestCode,
    @NonNull String[] permissions,
    @NonNull int[] grantResults
)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

void

Called when the fragment is visible to the user and actively running.

void

Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance if its process is restarted.

void

Called when the Fragment is visible to the user.

void

Called when the Fragment is no longer started.

void

Called when all saved state has been restored into the view hierarchy of the fragment.

void

Postpone the entering Fragment transition until startPostponedEnterTransition or executePendingTransactions has been called.

final void
postponeEnterTransition(long duration, @NonNull TimeUnit timeUnit)

Postpone the entering Fragment transition for a given amount of time and then call startPostponedEnterTransition.

final @NonNull ActivityResultLauncher<I>
@MainThread
<I, O> registerForActivityResult(
    @NonNull ActivityResultContract<I, O> contract,
    @NonNull ActivityResultCallback<O> callback
)

Register a request to start an activity for result, designated by the given contract.

final @NonNull ActivityResultLauncher<I>
@MainThread
<I, O> registerForActivityResult(
    @NonNull ActivityResultContract<I, O> contract,
    @NonNull ActivityResultRegistry registry,
    @NonNull ActivityResultCallback<O> callback
)

Register a request to start an activity for result, designated by the given contract.

void

Registers a context menu to be shown for the given view (multiple views can show the context menu).

final void
requestPermissions(@NonNull String[] permissions, int requestCode)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

final @NonNull FragmentActivity

Return the FragmentActivity this fragment is currently associated with.

final @NonNull Bundle

Return the arguments supplied when the fragment was instantiated.

final @NonNull Context

Return the Context this fragment is currently associated with.

final @NonNull FragmentManager

This method is deprecated.

This has been renamed to getParentFragmentManager() to make it clear that you are accessing the FragmentManager that contains this Fragment and not the FragmentManager associated with child Fragments.

final @NonNull Object

Return the host object of this fragment.

final @NonNull Fragment

Returns the parent Fragment containing this Fragment.

final @NonNull View

Get the root view for the fragment's layout (the one returned by onCreateView).

void

Sets whether the the exit transition and enter transition overlap or not.

void

Sets whether the the return transition and reenter transition overlap or not.

void

Supply the construction arguments for this fragment.

void

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

Sets the Transition that will be used to move Views into the initial scene.

void

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

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)

This method is deprecated.

This method is no longer needed when using a MenuProvider to provide a Menu to your activity, which replaces onCreateOptionsMenu as the recommended way to provide a consistent, optionally Lifecycle-aware, and modular way to handle menu creation and item selection.

void

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

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)

This method is deprecated.

Instead of retaining the Fragment itself, use a non-retained Fragment and keep retained state in a ViewModel attached to that Fragment.

void

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

Sets the Transition that will be used for shared elements transferred into the content Scene.

void

Sets the Transition that will be used for shared elements transferred back during a pop of the back stack.

void
setTargetFragment(@Nullable Fragment fragment, int requestCode)

This method is deprecated.

Instead of using a target fragment to pass results, the fragment requesting a result should use setFragmentResultListener to register a FragmentResultListener with a requestKey using its parent fragment manager.

void
setUserVisibleHint(boolean isVisibleToUser)

This method is deprecated.

If you are manually calling this method, use setMaxLifecycle instead.

boolean

Gets whether you should show UI with rationale before requesting a permission.

void

Call startActivity from the fragment's containing Activity.

void

Call startActivity from the fragment's containing Activity.

void
startActivityForResult(@NonNull Intent intent, int requestCode)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

void
startActivityForResult(
    @NonNull Intent intent,
    int requestCode,
    @Nullable Bundle options
)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

void
startIntentSenderForResult(
    @NonNull IntentSender intent,
    int requestCode,
    @Nullable Intent fillInIntent,
    int flagsMask,
    int flagsValues,
    int extraFlags,
    @Nullable Bundle options
)

This method is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

void

Begin postponed transitions after postponeEnterTransition was called.

@NonNull String
void

Prevents a context menu to be shown for the given view.

From androidx.lifecycle.HasDefaultViewModelProviderFactory
From androidx.lifecycle.LifecycleOwner
abstract Lifecycle
From androidx.savedstate.SavedStateRegistryOwner
From android.view.View.OnCreateContextMenuListener
abstract void
From androidx.lifecycle.ViewModelStoreOwner

Public constructors

HeadersSupportFragment

Added in 1.1.0
public HeadersSupportFragment()

Public methods

getAdapter

Added in 1.1.0
public final ObjectAdapter getAdapter()

Returns the Adapter that represents list of rows.

Returns
ObjectAdapter

Adapter that represents list of rows.

getBridgeAdapter

Added in 1.1.0
public final ItemBridgeAdapter getBridgeAdapter()

Returns the RecyclerView.Adapter that wraps getAdapter.

Returns
ItemBridgeAdapter

The RecyclerView.Adapter that wraps getAdapter.

getPresenterSelector

Added in 1.1.0
public final PresenterSelector getPresenterSelector()

Get the presenter selector used to create and bind views.

getSelectedPosition

Added in 1.1.0
public int getSelectedPosition()

Gets position of currently selected row.

Returns
int

Position of currently selected row.

getVerticalGridView

Added in 1.1.0
public final VerticalGridView getVerticalGridView()

isScrolling

Added in 1.1.0
public boolean isScrolling()

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.

Returns
@Nullable View

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

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.

onSaveInstanceState

public 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 if 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, onCreateView, and onViewCreated.

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
Bundle outState

Bundle in which to place your saved state.

onTransitionEnd

Added in 1.1.0
public void onTransitionEnd()

onTransitionPrepare

Added in 1.1.0
public boolean onTransitionPrepare()

onTransitionStart

Added in 1.1.0
public void onTransitionStart()

onViewCreated

public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState)

Called immediately after onCreateView 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
@NonNull View view

The View returned by onCreateView.

@Nullable Bundle savedInstanceState

If non-null, this fragment is being re-constructed from a previous saved state as given here.

setAdapter

Added in 1.1.0
public final void setAdapter(ObjectAdapter rowsAdapter)

Sets the adapter that represents a list of rows.

Parameters
ObjectAdapter rowsAdapter

Adapter that represents list of rows.

setAlignment

Added in 1.1.0
public void setAlignment(int windowAlignOffsetTop)

setOnHeaderClickedListener

Added in 1.1.0
public void setOnHeaderClickedListener(
    HeadersSupportFragment.OnHeaderClickedListener listener
)

setOnHeaderViewSelectedListener

Added in 1.1.0
public void setOnHeaderViewSelectedListener(
    HeadersSupportFragment.OnHeaderViewSelectedListener listener
)

setPresenterSelector

Added in 1.1.0
public final void setPresenterSelector(PresenterSelector presenterSelector)

Set the presenter selector used to create and bind views.

setSelectedPosition

Added in 1.1.0
public void setSelectedPosition(int position)

Sets the selected row position with smooth animation.

setSelectedPosition

Added in 1.1.0
public void setSelectedPosition(int position, boolean smooth)

Sets the selected row position.