AppCompatDelegate

public static final int FEATURE_ACTION_MODE_OVERLAY = 10

Flag for specifying the behavior of action modes when an Action Bar is not present. If overlay is enabled, the action mode UI will be allowed to cover existing window content.

public static final int FEATURE_SUPPORT_ACTION_BAR = 108

Flag for enabling the support Action Bar.

This is enabled by default for some devices. The Action Bar replaces the title bar and provides an alternate location for an on-screen menu button on some devices.

public static final int FEATURE_SUPPORT_ACTION_BAR_OVERLAY = 109

Flag for requesting an support Action Bar that overlays window content. Normally an Action Bar will sit in the space above window content, but if this feature is requested along with FEATURE_SUPPORT_ACTION_BAR it will be layered over the window content itself. This is useful if you would like your app to have more control over how the Action Bar is displayed, such as letting application content scroll beneath an Action Bar with a transparent background or otherwise displaying a transparent/translucent Action Bar over application content.

This mode is especially useful with View.SYSTEM_UI_FLAG_FULLSCREEN, which allows you to seamlessly hide the action bar in conjunction with other screen decorations. When an ActionBar is in this mode it will adjust the insets provided to View.fitSystemWindows(Rect) to include the content covered by the action bar, so you can do layout within that space.

public static final int MODE_NIGHT_AUTO = 0

public static final int MODE_NIGHT_AUTO_BATTERY = 3

Night mode which uses a dark mode when the system's 'Battery Saver' feature is enabled, otherwise it uses a 'light mode'. This mode can help the device to decrease power usage, depending on the display technology in the device. Please note: this mode should only be used when running on devices which do not provide a similar device-wide setting.

public static final int MODE_NIGHT_AUTO_TIME = 0

Night mode which switches between dark and light mode depending on the time of day (dark at night, light in the day).

The calculation used to determine whether it is night or not makes use of the location APIs (if this app has the necessary permissions). This allows us to generate accurate sunrise and sunset times. If this app does not have permission to access the location APIs then we use hardcoded times which will be less accurate.

public static final int MODE_NIGHT_FOLLOW_SYSTEM = -1

Mode which uses the system's night mode setting to determine if it is night or not.

public static final int MODE_NIGHT_NO = 1

Night mode which uses always uses a light mode, enabling notnight qualified resources regardless of the time.

public static final int MODE_NIGHT_UNSPECIFIED = -100

An unspecified mode for night mode. This is primarily used with setLocalNightMode, to allow the default night mode to be used. If both the default and local night modes are set to this value, then the default value of MODE_NIGHT_FOLLOW_SYSTEM is applied.

public static final int MODE_NIGHT_YES = 2

Night mode which uses always uses a dark mode, enabling night qualified resources regardless of the time.

public abstract void addContentView(View v, ViewGroup.LayoutParams lp)

Should be called instead of addContentView}

public abstract boolean applyDayNight()

Applies the currently selected night mode to this delegate's host component.

This enables the Theme.AppCompat.DayNight family of themes to work, using the specified mode.

You can be notified when the night changes by overriding the onNightModeChanged method.

public void attachBaseContext(Context context)

@CallSuper
public @NonNull Context attachBaseContext2(@NonNull Context context)

Should be called from attachBaseContext.

public static @NonNull AppCompatDelegate create(@NonNull Activity activity, @Nullable AppCompatCallback callback)

Create an androidx.appcompat.app.AppCompatDelegate to use with activity.

public static @NonNull AppCompatDelegate create(@NonNull Dialog dialog, @Nullable AppCompatCallback callback)

Create an androidx.appcompat.app.AppCompatDelegate to use with dialog.

public static @NonNull AppCompatDelegate create(
    @NonNull Context context,
    @NonNull Activity activity,
    @Nullable AppCompatCallback callback
)

Create an androidx.appcompat.app.AppCompatDelegate to use with a context and hosted by an Activity.

public static @NonNull AppCompatDelegate create(
    @NonNull Context context,
    @NonNull Window window,
    @Nullable AppCompatCallback callback
)

Create an androidx.appcompat.app.AppCompatDelegate to use with a context and a window.

public abstract View createView(
    @Nullable View parent,
    String name,
    @NonNull Context context,
    @NonNull AttributeSet attrs
)

This should be called from a LayoutInflater.Factory2 in order to return tint-aware widgets.

This is only needed if you are using your own LayoutInflater factory, and have therefore not installed the default factory via installViewFactory.

public abstract @Nullable T <T extends View> findViewById(@IdRes int id)

Finds a view that was identified by the id attribute from the XML that was processed in onCreate.

@AnyThread
public static @NonNull LocaleListCompat getApplicationLocales()

Returns application locales for the calling app as a LocaleListCompat.

Returns a getEmptyLocaleList if no app-specific locales are set.

Note: This API only work at AppCompatDelegate and it should always be called after Activity.onCreate().

public @Nullable Context getContextForDelegate()

Returns the context for the current delegate.

public static int getDefaultNightMode()

Returns the default night mode.

public abstract @Nullable ActionBarDrawerToggle.Delegate getDrawerToggleDelegate()

Returns an ActionBarDrawerToggle.Delegate which can be returned from your Activity if it implements ActionBarDrawerToggle.DelegateProvider.

public int getLocalNightMode()

Returns the night mode previously set via getLocalNightMode.

public abstract MenuInflater getMenuInflater()

Return the value of this call from your getMenuInflater

public abstract @Nullable ActionBar getSupportActionBar()

Support library version of getActionBar.

public abstract boolean hasWindowFeature(int featureId)

Query for the availability of a certain feature.

This should be called instead of hasFeature.

public abstract void installViewFactory()

Installs AppCompat's android.view.LayoutInflater Factory so that it can replace the framework widgets with compatible tinted versions. This should be called before super.onCreate() as so:

protected void onCreate(Bundle savedInstanceState) {
    getDelegate().installViewFactory();
    getDelegate().onCreate(savedInstanceState);
    super.onCreate(savedInstanceState);

    // ...
}

public abstract void invalidateOptionsMenu()

Should be called from invalidateOptionsMenu} or supportInvalidateOptionsMenu.

public static boolean isCompatVectorFromResourcesEnabled()

Returns whether vector drawables on older platforms (< API 21) can be accessed from within resources.

public abstract boolean isHandleNativeActionModesEnabled()

Returns whether AppCompat handles any native action modes itself.

public abstract void onConfigurationChanged(Configuration newConfig)

Should be called from onConfigurationChanged

public abstract void onCreate(Bundle savedInstanceState)

Should be called from Activity.onCreate().

This should be called before super.onCreate() as so:

protected void onCreate(Bundle savedInstanceState) {
    getDelegate().onCreate(savedInstanceState);
    super.onCreate(savedInstanceState);
    // ...
}

public abstract void onDestroy()

Should be called from onDestroy

public abstract void onPostCreate(Bundle savedInstanceState)

Should be called from onPostCreate

public abstract void onPostResume()

Should be called from onPostResume

public abstract void onSaveInstanceState(Bundle outState)

Allows AppCompat to save instance state.

public abstract void onStart()

Should be called from onStart Activity.onStart()}

public abstract void onStop()

Should be called from Activity.onStop()

public abstract boolean requestWindowFeature(int featureId)

Enable extended window features. This should be called instead of requestWindowFeature or getWindow().requestFeature().

public static void setApplicationLocales(@NonNull LocaleListCompat locales)

Sets the current locales for the calling app.

If this method is called after any host components with attached AppCompatDelegates have been 'created', a LocaleList configuration change will occur in each. This may result in those components being recreated, depending on their manifest configuration.

This method accepts LocaleListCompat as an input parameter.

Apps should continue to read Locales via their in-process LocaleLists.

Pass a getEmptyLocaleList to reset to the system locale.

Note: This API should always be called after Activity.onCreate(), apart from any exceptions explicitly mentioned in this documentation.

On API level 33 and above, this API will handle storage automatically.

For API levels below that, the developer has two options:

• They can opt-in to automatic storage handled through the library. They can do this by adding a special metaData entry in their AndroidManifest.xml, similar to :

      <service
          android:name="androidx.appcompat.app.AppLocalesMetadataHolderService"
          android:enabled="false"
          android:exported="false">
          <meta-data
              android:name="autoStoreLocales"
              android:value="true" />
      </service>
  

  They should be mindful that this will cause a blocking diskRead and diskWrite strictMode violation, and they might need to suppress it at their end.
• The second option is that they can choose to handle storage themselves. In order to do so they must use this API to initialize locales during app-start up and provide their stored locales. In this case, API should be called before Activity.onCreate() in the activity lifecycle, e.g. in attachBaseContext(). Note: Developers should gate this to API versions <33.

  This API should be called after Activity.onCreate() for all other cases.

When the application using this API with API versions <33 updates to a version >= 33, then there can be two scenarios for this transition:

• If the developer has opted-in for autoStorage then the locales will be automatically synced to the framework. Developers must specify android:enabled="false" for the AppLocalesMetadataHolderService as shown in the meta-data entry above.
• If the developer has not opted-in for autoStorage then they will need to handle this transition on their end.

Note: This API work with the AppCompatActivity context, not for others context, for Android 12 (API level 32) and earlier. If there is a requirement to get the localized string which respects the per-app locale in non-AppCompatActivity context, please consider using getString or getContextForLanguage.

public static void setCompatVectorFromResourcesEnabled(boolean enabled)

Sets whether vector drawables on older platforms (< API 21) can be used within android.graphics.drawable.DrawableContainer resources.

When enabled, AppCompat can intercept some drawable inflation from the framework, which enables implicit inflation of vector drawables within android.graphics.drawable.DrawableContainer resources. You can then use those drawables in places such as android:src on android.widget.ImageView, or android:drawableLeft on android.widget.TextView. Example usage:

<selector xmlns:android="...">
    <item android:state_checked="true"
          android:drawable="@drawable/vector_checked_icon" />
    <item android:drawable="@drawable/vector_icon" />
</selector>

<TextView
        ...
        android:drawableLeft="@drawable/vector_state_list_icon" />

This feature defaults to disabled, since enabling it can cause issues with memory usage, and problems updating Configuration instances. If you update the configuration manually, then you probably do not want to enable this. You have been warned.

Even with this disabled, you can still use vector resources through setImageResource and its app:srcCompat attribute. They can also be used in anything which AppCompat inflates for you, such as menu resources.

Please note: this only takes effect in Activities created after this call.

public abstract void setContentView(@LayoutRes int resId)

Should be called instead of setContentView}

public abstract void setContentView(View v)

Should be called instead of setContentView}

public abstract void setContentView(View v, ViewGroup.LayoutParams lp)

Should be called instead of setContentView}

public static void setDefaultNightMode(int mode)

Sets the default night mode. This is the default value used for all components, but can be overridden locally via setLocalNightMode.

This is the primary method to control the DayNight functionality, since it allows the delegates to avoid unnecessary recreations when possible.

If this method is called after any host components with attached AppCompatDelegates have been 'created', a uiMode configuration change will occur in each. This may result in those components being recreated, depending on their manifest configuration.

Defaults to MODE_NIGHT_FOLLOW_SYSTEM.

public abstract void setHandleNativeActionModesEnabled(boolean enabled)

Whether AppCompat handles any native action modes itself.

This methods only takes effect on ICE_CREAM_SANDWICH and above.

public abstract void setLocalNightMode(int mode)

Override the night mode used for this delegate's host component.

When setting a mode to be used across an entire app, the setDefaultNightMode method is preferred.

If this is called after the host component has been created, a uiMode configuration change will occur, which may result in the component being recreated.

It is not recommended to use this method on a delegate attached to a Dialog. Dialogs use the host Activity as their context, resulting in the dialog's night mode overriding the Activity's night mode.

Note: This method is not recommended for use on devices running SDK 16 or earlier, as the specified night mode configuration may leak to other activities. Instead, consider using setDefaultNightMode to specify an app-wide night mode.

@CallSuper
@RequiresApi(value = 33)
public void setOnBackInvokedDispatcher(@Nullable OnBackInvokedDispatcher dispatcher)

Sets the OnBackInvokedDispatcher for handling system back for Android SDK 33 and above.

If the delegate is hosted by an Activity, the default dispatcher is obtained via getOnBackInvokedDispatcher.

public abstract void setSupportActionBar(@Nullable Toolbar toolbar)

Set a Toolbar to act as the ActionBar for this delegate.

When set to a non-null value the getSupportActionBar ()} method will return an ActionBar object that can be used to control the given toolbar as if it were a traditional window decor action bar. The toolbar's menu will be populated with the Activity's options menu and the navigation button will be wired through the standard home menu select action.

In order to use a Toolbar within the Activity's window content the application must not request the window feature FEATURE_SUPPORT_ACTION_BAR.

public void setTheme(@StyleRes int themeResId)

This should be called from setTheme to notify AppCompat of what the current theme resource id is.

public abstract void setTitle(@Nullable CharSequence title)

Should be called from onTitleChanged}

public abstract @Nullable ActionMode startSupportActionMode(@NonNull ActionMode.Callback callback)

Start an action mode.