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Your app can let the user choose between themes. The recommended options are:. Each of the options map directly to one of the AppCompat. DayNight modes:. To switch the theme, call AppCompatDelegate. Android 10 provides Force Dark, a feature for developers to quickly implement a Dark theme without explicitly setting a DayNight theme, as described above.
Force Dark analyzes each view of your light-themed app, and applies a dark theme automatically before it is drawn to the screen. Some developers use a mix of Force Dark and native implementation to cut down on the amount of time needed to implement Dark theme.
This attribute is set on all of the system and AndroidX provided light themes, such as Theme. When you use Force Dark, you should make sure to test your app thoroughly and exclude views as needed. If your app uses a dark theme such as Theme. Material , Force Dark will not be applied. Similarly, if your app's theme inherits from a DayNight theme, Force Dark will not be applied, due to the automatic theme switching.
Force Dark can be controlled on specific views with the android:forceDarkAllowed layout attribute or with setForceDarkAllowed. For information on using dark themes in web-based content, see Darken web content in WebView. For an example of dark theme applied, see the WebView demo on GitHub.
Two good examples are notifications and launcher widgets. Use the system-provided notification templates such as MessagingStyle.
This means that the system is responsible for ensuring the correct view styling is applied. For launcher widgets, or if your app uses custom notification content views, it is important to make sure you test the content on both the Light and Dark themes. If your app has a custom launch screen, it may need to be modified so that it reflects the selected theme.
Remove any hardcoded colors, for example any background colors pointing may be white. Use the? Note that dark-themed android:windowBackground drawables only work on Android This means that Activities will be automatically recreated.
In some cases you might want an app to handle the configuration change. For example, you might want to delay a configuration change because a video is playing. An app can handle the implementation of Dark theme itself by declaring that each Activity can handle the uiMode configuration change:. When an Activity declares it handles configuration changes, its onConfigurationChanged method will be called when there is a theme change.
Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app. App resources. Resource types. App manifest file. Device compatibility. Multiple APK support. Tablets, large screens, and foldables. Build responsive UIs. Build for foldables. Getting started. Handling data. User input. Watch Face Studio. Health services. Creating watch faces. Android TV. Build TV Apps. Build TV playback apps. Help users find content on TV.
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View binding. In Android 9, such permissions were part of com. In Android 10, the Package Installer app is split into sections to enable the permissions logic to be updated. As an updatable Mainline module, PermissionController:. Provides services to which the system and applications can bind, including role management, permission revocation, and basic permission information for Settings. In Android 11, the PermissionsController module can automatically revoke runtime permissions for apps that haven't been used for an extended period of time.
Apps targeting SDK 30 or higher have auto revoke enabled by default, while apps targeting SDK 29 or lower have auto revoke disabled by default.
When enabled, auto-revoke affects all runtime permissions but exempts all pre-granted permissions, including policy- and system-fixed permissions and permissions granted by default or by role. For details, refer to Auto-reset permissions from unused apps.
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