Added in API level 11

public class

Fragment

extends Object
implements ComponentCallbacks2 View.OnCreateContextMenuListener

java.lang.Object
↳	android.app.Fragment

Known Direct Subclasses

BrowseFragment, DetailsFragment, DialogFragment, ErrorFragment, HeadersFragment, ListFragment, PreferenceFragment, RowsFragment, SearchFragment, VerticalGridFragment, WebViewFragment

Known Indirect Subclasses

PlaybackOverlayFragment

Class Overview

A Fragment is a piece of an application's user interface or behavior that can be placed in an Activity. Interaction with fragments is done through FragmentManager, which can be obtained via Activity.getFragmentManager() and Fragment.getFragmentManager().

The Fragment class can be used many ways to achieve a wide variety of results. In its core, it represents a particular operation or interface that is running within a larger Activity. A Fragment is closely tied to the Activity it is in, and can not be used apart from one. Though Fragment defines its own lifecycle, that lifecycle is dependent on its activity: if the activity is stopped, no fragments inside of it can be started; when the activity is destroyed, all fragments will be destroyed.

All subclasses of Fragment must include a public no-argument constructor. The framework will often re-instantiate a fragment class when needed, in particular during state restore, and needs to be able to find this constructor to instantiate it. If the no-argument constructor is not available, a runtime exception will occur in some cases during state restore.

Topics covered here:

Older Platforms
Lifecycle
Layout
Back Stack

Developer Guides

For more information about using fragments, read the Fragments developer guide.

Older Platforms

While the Fragment API was introduced in HONEYCOMB, a version of the API at is also available for use on older platforms through FragmentActivity. See the blog post Fragments For All for more details.

Lifecycle

Though a Fragment's lifecycle is tied to its owning activity, it has its own wrinkle on the standard activity lifecycle. It includes basic activity lifecycle methods such as onResume(), but also important are methods related to interactions with the activity and UI generation.

The core series of lifecycle methods that are called to bring a fragment up to resumed state (interacting with the user) are:

onAttach(Activity) called once the fragment is associated with its activity.
onCreate(Bundle) called to do initial creation of the fragment.
onCreateView(LayoutInflater, ViewGroup, Bundle) creates and returns the view hierarchy associated with the fragment.
onActivityCreated(Bundle) tells the fragment that its activity has completed its own Activity.onCreate().
onViewStateRestored(Bundle) tells the fragment that all of the saved state of its view hierarchy has been restored.
onStart() makes the fragment visible to the user (based on its containing activity being started).
onResume() makes the fragment interacting with the user (based on its containing activity being resumed).

As a fragment is no longer being used, it goes through a reverse series of callbacks:

onPause() fragment is no longer interacting with the user either because its activity is being paused or a fragment operation is modifying it in the activity.
onStop() fragment is no longer visible to the user either because its activity is being stopped or a fragment operation is modifying it in the activity.
onDestroyView() allows the fragment to clean up resources associated with its View.
onDestroy() called to do final cleanup of the fragment's state.
onDetach() called immediately prior to the fragment no longer being associated with its activity.

Layout

Fragments can be used as part of your application's layout, allowing you to better modularize your code and more easily adjust your user interface to the screen it is running on. As an example, we can look at a simple program consisting of a list of items, and display of the details of each item.

An activity's layout XML can include <fragment> tags to embed fragment instances inside of the layout. For example, here is a simple layout that embeds one fragment:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">
    <fragment class="com.example.android.apis.app.FragmentLayout$TitlesFragment"
            android:id="@+id/titles"
            android:layout_width="match_parent" android:layout_height="match_parent" />
</FrameLayout>

The layout is installed in the activity in the normal way:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.fragment_layout);
}

The titles fragment, showing a list of titles, is fairly simple, relying on ListFragment for most of its work. Note the implementation of clicking an item: depending on the current activity's layout, it can either create and display a new fragment to show the details in-place (more about this later), or start a new activity to show the details.

public static class TitlesFragment extends ListFragment {
    boolean mDualPane;
    int mCurCheckPosition = 0;

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        // Populate list with our static array of titles.
        setListAdapter(new ArrayAdapter<String>(getActivity(),
                android.R.layout.simple_list_item_activated_1, Shakespeare.TITLES));

        // Check to see if we have a frame in which to embed the details
        // fragment directly in the containing UI.
        View detailsFrame = getActivity().findViewById(R.id.details);
        mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;

        if (savedInstanceState != null) {
            // Restore last state for checked position.
            mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
        }

        if (mDualPane) {
            // In dual-pane mode, the list view highlights the selected item.
            getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
            // Make sure our UI is in the correct state.
            showDetails(mCurCheckPosition);
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("curChoice", mCurCheckPosition);
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        showDetails(position);
    }

    /**
     * Helper function to show the details of a selected item, either by
     * displaying a fragment in-place in the current UI, or starting a
     * whole new activity in which it is displayed.
     */
    void showDetails(int index) {
        mCurCheckPosition = index;

        if (mDualPane) {
            // We can display everything in-place with fragments, so update
            // the list to highlight the selected item and show the data.
            getListView().setItemChecked(index, true);

            // Check what fragment is currently shown, replace if needed.
            DetailsFragment details = (DetailsFragment)
                    getFragmentManager().findFragmentById(R.id.details);
            if (details == null || details.getShownIndex() != index) {
                // Make new fragment to show this selection.
                details = DetailsFragment.newInstance(index);

                // Execute a transaction, replacing any existing fragment
                // with this one inside the frame.
                FragmentTransaction ft = getFragmentManager().beginTransaction();
                if (index == 0) {
                    ft.replace(R.id.details, details);
                } else {
                    ft.replace(R.id.a_item, details);
                }
                ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
                ft.commit();
            }

        } else {
            // Otherwise we need to launch a new activity to display
            // the dialog fragment with selected text.
            Intent intent = new Intent();
            intent.setClass(getActivity(), DetailsActivity.class);
            intent.putExtra("index", index);
            startActivity(intent);
        }
    }
}

The details fragment showing the contents of a selected item just displays a string of text based on an index of a string array built in to the app:

public static class DetailsFragment extends Fragment {
    /**
     * Create a new instance of DetailsFragment, initialized to
     * show the text at 'index'.
     */
    public static DetailsFragment newInstance(int index) {
        DetailsFragment f = new DetailsFragment();

        // Supply index input as an argument.
        Bundle args = new Bundle();
        args.putInt("index", index);
        f.setArguments(args);

        return f;
    }

    public int getShownIndex() {
        return getArguments().getInt("index", 0);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        if (container == null) {
            // We have different layouts, and in one of them this
            // fragment's containing frame doesn't exist.  The fragment
            // may still be created from its saved state, but there is
            // no reason to try to create its view hierarchy because it
            // won't be displayed.  Note this is not needed -- we could
            // just run the code below, where we would create and return
            // the view hierarchy; it would just never be used.
            return null;
        }

        ScrollView scroller = new ScrollView(getActivity());
        TextView text = new TextView(getActivity());
        int padding = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                4, getActivity().getResources().getDisplayMetrics());
        text.setPadding(padding, padding, padding, padding);
        scroller.addView(text);
        text.setText(Shakespeare.DIALOGUE[getShownIndex()]);
        return scroller;
    }
}

In this case when the user clicks on a title, there is no details container in the current activity, so the titles fragment's click code will launch a new activity to display the details fragment:

public static class DetailsActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (getResources().getConfiguration().orientation
                == Configuration.ORIENTATION_LANDSCAPE) {
            // If the screen is now in landscape mode, we can show the
            // dialog in-line with the list so we don't need this activity.
            finish();
            return;
        }

        if (savedInstanceState == null) {
            // During initial setup, plug in the details fragment.
            DetailsFragment details = new DetailsFragment();
            details.setArguments(getIntent().getExtras());
            getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();
        }
    }
}

However the screen may be large enough to show both the list of titles and details about the currently selected title. To use such a layout on a landscape screen, this alternative layout can be placed under layout-land:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <fragment class="com.example.android.apis.app.FragmentLayout$TitlesFragment"
            android:id="@+id/titles" android:layout_weight="1"
            android:layout_width="0px" android:layout_height="match_parent" />

    <FrameLayout android:id="@+id/details" android:layout_weight="1"
            android:layout_width="0px" android:layout_height="match_parent"
            android:background="?android:attr/detailsElementBackground" />

</LinearLayout>

Note how the prior code will adjust to this alternative UI flow: the titles fragment will now embed the details fragment inside of this activity, and the details activity will finish itself if it is running in a configuration where the details can be shown in-place.

When a configuration change causes the activity hosting these fragments to restart, its new instance may use a different layout that doesn't include the same fragments as the previous layout. In this case all of the previous fragments will still be instantiated and running in the new instance. However, any that are no longer associated with a <fragment> tag in the view hierarchy will not have their content view created and will return false from isInLayout(). (The code here also shows how you can determine if a fragment placed in a container is no longer running in a layout with that container and avoid creating its view hierarchy in that case.)

The attributes of the <fragment> tag are used to control the LayoutParams provided when attaching the fragment's view to the parent container. They can also be parsed by the fragment in onInflate(Activity, AttributeSet, Bundle) as parameters.

The fragment being instantiated must have some kind of unique identifier so that it can be re-associated with a previous instance if the parent activity needs to be destroyed and recreated. This can be provided these ways:

If nothing is explicitly supplied, the view ID of the container will be used.
android:tag can be used in <fragment> to provide a specific tag name for the fragment.
android:id can be used in <fragment> to provide a specific identifier for the fragment.

Back Stack

The transaction in which fragments are modified can be placed on an internal back-stack of the owning activity. When the user presses back in the activity, any transactions on the back stack are popped off before the activity itself is finished.

For example, consider this simple fragment that is instantiated with an integer argument and displays that in a TextView in its UI:

public static class CountingFragment extends Fragment {
    int mNum;

    /**
     * Create a new instance of CountingFragment, providing "num"
     * as an argument.
     */
    static CountingFragment newInstance(int num) {
        CountingFragment f = new CountingFragment();

        // Supply num input as an argument.
        Bundle args = new Bundle();
        args.putInt("num", num);
        f.setArguments(args);

        return f;
    }

    /**
     * When creating, retrieve this instance's number from its arguments.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mNum = getArguments() != null ? getArguments().getInt("num") : 1;
    }

    /**
     * The Fragment's UI is just a simple text view showing its
     * instance number.
     */
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.hello_world, container, false);
        View tv = v.findViewById(R.id.text);
        ((TextView)tv).setText("Fragment #" + mNum);
        tv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.gallery_thumb));
        return v;
    }
}

A function that creates a new instance of the fragment, replacing whatever current fragment instance is being shown and pushing that change on to the back stack could be written as:

void addFragmentToStack() {
    mStackLevel++;

    // Instantiate a new fragment.
    Fragment newFragment = CountingFragment.newInstance(mStackLevel);

    // Add the fragment to the activity, pushing this transaction
    // on to the back stack.
    FragmentTransaction ft = getFragmentManager().beginTransaction();
    ft.replace(R.id.simple_fragment, newFragment);
    ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
    ft.addToBackStack(null);
    ft.commit();
}

After each call to this function, a new entry is on the stack, and pressing back will pop it to return the user to whatever previous state the activity UI was in.

Summary

Nested Classes
class	Fragment.InstantiationException	Thrown by `instantiate(Context, String, Bundle)` when there is an instantiation failure.
class	Fragment.SavedState	State information that has been retrieved from a fragment instance through `FragmentManager.saveFragmentInstanceState`.

XML Attributes
Attribute Name	Related Method	Description
android:fragmentAllowEnterTransitionOverlap	setAllowEnterTransitionOverlap(boolean)	Sets whether the enter and exit transitions should overlap when transitioning forward.
android:fragmentAllowReturnTransitionOverlap	setAllowReturnTransitionOverlap(boolean)	Sets whether the enter and exit transitions should overlap when transitioning because of popping the back stack.
android:fragmentEnterTransition	setEnterTransition(Transition)	The Transition that will be used to move Views into the initial scene.
android:fragmentExitTransition	setReturnTransition(Transition)	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.
android:fragmentReenterTransition	setReenterTransition(Transition)	The Transition that will be used to move Views in to the scene when returning due to popping a back stack.
android:fragmentSharedElementEnterTransition	setSharedElementEnterTransition(Transition)	The Transition that will be used for shared elements transferred into the content Scene.
android:fragmentSharedElementReturnTransition	setSharedElementReturnTransition(Transition)	The Transition that will be used for shared elements transferred back during a pop of the back stack.

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Inherited Constants

From interface android.content.ComponentCallbacks2

Public Constructors
	Fragment() Default constructor.

Public Methods
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 when the fragment was instantiated, if any.
final FragmentManager	getChildFragmentManager() Return a private FragmentManager for placing and managing Fragments inside of this Fragment.
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 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) Return a localized string from the application's package's default string table.
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	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) Called when a fragment is first attached to its activity.
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(Activity, AttributeSet, Bundle)` instead.
void	onInflate(Activity activity, 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.
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	onPrepareOptionsMenu(Menu menu) Prepare the Screen's standard options menu to be displayed.
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).
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.
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.
String	toString() Returns a string containing a concise, human-readable description of this object.
void	unregisterForContextMenu(View view) Prevents a context menu to be shown for the given view.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface android.content.ComponentCallbacks2

From interface android.view.View.OnCreateContextMenuListener

From interface android.content.ComponentCallbacks

XML Attributes

android:fragmentAllowEnterTransitionOverlap

Sets whether the enter and exit transitions should overlap when transitioning forward. Corresponds to setAllowEnterTransitionOverlap(boolean)