To add a listener for color changes, you can call the addOnColorsChangedListener method. You can also call the getWallpaperColors method to retrieve the primary colors of a wallpaper.
The FingerprintManager class has introduced the following error codes:. Content and code samples on this page are subject to the licenses described in the Content License. All Android releases Android 9. Features and APIs. Behavior changes. Android Developers. Android Oreo Go edition Android Go is our initiative to optimize the Android experience for billions of people coming online around the world.
Features in the Android Oreo Go edition configuration include: Memory optimizations. Improved memory usage across the platform to ensure that apps can run efficiently on devices with 1GB or less RAM. Flexible targeting options.
New hardware feature constants to let you target the distribution of your apps to normal or low-RAM devices through Google Play. Google Play. Peace of mind in the palm of your hand Google Play Protect: Working to keep your device and data safe from misbehaving apps by scanning over 50 billion apps per day, even the ones you haven't installed yet!
Talk about a life saver Whether you're talking, playing, working or streaming, you can feel confident about keeping your battery strong and full of life. Express yourself in more ways than ever Emoji: Share the feels with a fully redesigned emoji set, including over 60 new emoji. A bird? A plane? No, it's Android Oreo. Powers, and beyond Accessibility button. Accessibility volume. Accessibility services can optimize the audio experience for users with disabilities.
Adaptive icons. Ambient screen. Background execution limits. More control over how apps run in the background for better overall system performance. Background location limits. Limits the frequency of location updates in the background for better overall system health. MessagingStyle with photo attached. For sample code that uses notifications, including Android 9 features, see the Android Notifications Sample. Starting in Android 7. Android 9 enhances this feature with the following enhancements:.
Simplified support for conversation participants: The Person class is used to identify people involved in a conversation, including their avatars and URIs. The Person class also supports the Builder design pattern. Support for images: Android 9 now displays images in Messaging Notifications on phones. You can use setData on the message to display an image. The following code snippet demonstrates how to create a Person and a message containing an image. You can use this extra to pre-populate text fields in the app so users can finish their reply.
Identify if a conversation is a group conversation: You can use setGroupConversation to purposefully identify a conversation as a group or non-group conversation. Set the semantic action for an intent: The setSemanticAction method allows you to give semantic meaning to an action, such as "mark as read," "delete," "reply," and so on. SmartReply: Android 9 supports the same suggested replies available in your messaging app. Use RemoteInput. Android 8. Android 9 simplifies notification channel settings with these changes:.
Blocking channel groups: Users can now block entire groups of channels within the notification settings for an app. You can use the isBlocked method to identify when a group is blocked and, as a result, not send any notifications for channels in that group. Additionally, your app can query for current channel group settings using the new getNotificationChannelGroup method.
The app that owns the blocked channel or group can listen for these intents and react accordingly. For further information on these intent actions and extras, refer to the updated constants list in the NotificationManager reference. For information on reacting to broadcast intents, refer to Broadcasts.
Policy has three new Do-Not-Disturb priority categories:. Policy also has seven new Do-Not-Disturb constants you can use to suppress visual interruption:.
On devices running Android 9, you can access streams simultaneously from two or more physical cameras. On devices with either dual-front or dual-back cameras, you can create innovative features not possible with just a single camera, such as seamless zoom, bokeh, and stereo vision. The API also lets you call a logical or fused camera stream that automatically switches between two or more cameras. Other improvements in camera include additional Session parameters that help to reduce delays during initial capture, and surface sharing that lets camera clients handle various use cases without the need to stop and start camera streaming.
We've also added APIs for display-based flash support and access to OIS timestamps for app-level image stabilization and special effects. Android 9 introduces the ImageDecoder class, which provides a modernized approach for decoding images. Use this class instead of the BitmapFactory and BitmapFactory. Options APIs. To decode an image, first call createSource with the source of the encoded image. Then, call decodeDrawable or decodeBitmap by passing the ImageDecoder.
Source object to create a Drawable or a Bitmap. ImageDecoder calls onHeaderDecoded with the image's default width and height, once they are known. ImageDecoder also lets you add customized and complicated effects to an image such as rounded corners or circle masks. Use setPostProcessor with an instance of the PostProcessor class to execute whatever drawing commands you want. The render thread also uses a worker thread to decode, so that decoding does not interfere with other operations on the render thread.
This implementation allows your app to display an animated image without managing its updates or interfering with other events on your app's UI thread. ImageDecoder has several methods allowing you to further modify the image. For example, you can use the setPostProcessor method to modify the appearance of the image, such as applying a circle mask or rounded corners. Google reserves all rights not expressly granted to you.
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