Android support library Introduction: MediaComPat framework detailed explanation

Android support library Introduction: MediaComPat framework detailed explanation In Android development, we often need to use multimedia functions to play audio or video files.In order to facilitate developers to use a unified multimedia API on different versions of Android, Android provides the MediaCompat support library. The MediaComPat support library is part of the Android support library. It provides developers with a unified API for developers to use multimedia functions on different Android versions.Through MediaCompat, developers can implement audio or video playback, control and management functions without considering different versions of API differences. Below we will introduce the MediaCompat framework in detail and provide some Java code examples to demonstrate its usage. 1. Introduce the support library To use the MediaCompat support library, you need to add the following dependencies to the project's built.gradle file: dependencies { implementation 'androidx.media:media:1.2.0' } 2. Media browser MediaComPat provides a MediaBrowsercompat class for browsing media content.You can use MediaBrowsercomPat.connectionCallback to process the media browser connection status. Here are a simple code example to demonstrate how to create a media browser and connect to media services: private MediaBrowserCompat mediaBrowser; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mediaBrowser = new MediaBrowserCompat(this, new ComponentName(this, MediaPlaybackService.class), connectionCallback, null); } private MediaBrowserCompat.ConnectionCallback connectionCallback = new MediaBrowserCompat.ConnectionCallback() { @Override public void onConnected() { MediaControllerCompat mediaController = new MediaControllerCompat(MainActivity.this, mediaBrowser.getSessionToken()); MediaControllerCompat.setMediaController(MainActivity.this, mediaController); // After the connection is successful, other operations can be performed, such as media browsing, media control, etc. } }; @Override protected void onStart() { super.onStart(); mediaBrowser.connect(); } @Override protected void onStop() { super.onStop(); MediaControllerCompat mediaController = MediaControllerCompat.getMediaController(MainActivity.this); if (mediaController != null) { mediaController.getTransportControls().stop(); } mediaBrowser.disconnect(); } 3. Media controller MediaComPat provides the MediaControllerCompat class to control the operation of media playback, pause, jumping and other operations. Here are a simple code example to show how to use MediaControllerCompat to control the media playback: MediaControllerCompat mediaController = MediaControllerCompat.getMediaController(MainActivity.this); mediaController.getTransportControls().play(); mediaController.getTransportControls().pause(); mediaController.getTransportControls().skipToNext(); mediaController.getTransportControls().skipToPrevious(); 4. Media player MediaComPat provides MediaSessionCompat and MediaPlayercompat class to create and manage media sessions and play media playback. Here are a simple code example to demonstrate how to use MediaSessionCompat and MediaPlayercompat for media playback: MediaSessionCompat mediaSession = new MediaSessionCompat(MainActivity.this, "MediaSession"); mediaSession.setActive(true); MediaPlayerCompat mediaPlayer = MediaPlayerCompat.create(MainActivity.this); mediaPlayer.setAudioAttributes( new AudioAttributesCompat.Builder() .setContentType(AudioAttributesCompat.CONTENT_TYPE_MUSIC) .build()); mediaPlayer.setDataSource("http://example.com/audio.mp3"); mediaPlayer.prepare(); mediaPlayer.start(); Through the above examples, we can see that using the MediaComPat framework can easily achieve the development of Android multimedia functions without having to care about different versions of API differences.Developers can use APIs provided by MediaCombat for multimedia operations according to their own needs, so as to provide users with a better audio and video playback experience.