How to use Android Support Library Media Compat to create applications with advanced media functions

How to use Android Support Library Media Compat to create applications with advanced media functions The MediaComPat library in the Android support library is a powerful tool that helps us to achieve advanced media functions in the application.This article will introduce how to use the MediaCompat Library to create Android applications with advanced media functions and provide Java code examples. 1. Add dependencies Add the following dependencies in the build.gradle file in your project: the following dependencies: dependencies { // Other dependencies ... implementation 'androidx.media:media:1.4.3' } This will add the MediaCompat library to your project so that you can start using the class and methods. 2. Create MediaSessionCompat First, you need to create a MediaSessionCompat object.MediaSessionCompat is a class used to manage the media.You can create a MediaSessionCompat object in your Activity or Service, as shown below:: MediaSessionCompat mediaSession = new MediaSessionCompat(context, "tag"); mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS); In this example, "tag" is a unique identifier that you can customize according to your needs. 3. Set back callback After creating the MediaSessionCompat object, you need to set a variety of callback methods to perform corresponding operations when the media playback status changes.For example, you can set the following callback method: mediaSession.setCallback(new MediaSessionCompat.Callback() { @Override public void onPlay() { // Play the media } @Override public void onPause() { // Pay the media } @Override public void onStop() { // Stop the media } // Other adjustment methods ... }); You can customize the behavior of callback methods according to your application needs. 4. Initialize MediaSessionCompat After setting up the callback method, you need to call some initialization methods of MediaSessionCompat to ensure that it can properly interact with other media components.The following are some commonly used initialization methods: mediaSession.setPlaybackToLocal(AudioManager.STREAM_MUSIC); mediaSession.setActive(true); These methods will ensure that the MediaSessionCompat and audio manager and other media components have an audio focus request for appropriate interaction. 5. Create MediaMetAdatacompat MediaMetAdatacomPat class is used to manage metadata of media files, such as title, artist, album and other information.You can use the following code to create a MediaMetAdatacompat object: MediaMetadataCompat.Builder metadataBuilder = new MediaMetadataCompat.Builder(); metadataBuilder.Putstring metadataBuilder.putString metadataBuilder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, "专辑"); MediaMetadataCompat mediaMetadata = metadataBuilder.build(); According to your needs, you can add or ignore other metadata information. 6. Create MediaControllerCompat To interact with MediaSessionCompat, you need to create a MediaControllerCompat object.The MediaControllerCompat class provides a set of methods to control the playback and pause of media sessions.The following is an example code for creating a MediaControllerCompat object: MediaControllerCompat mediaController = new MediaControllerCompat(context, mediaSession.getSessionToken()); mediaController.getTransportControls().play(); You can also obtain information such as the current playback status, metadata and other information of the media session through the MediaControllerCompat object. At this point, you have completed the basic steps to create Android applications with advanced media functions using the MediaCombat Library.According to your application needs, you can use the class and methods in more MediaCompat libraries to expand the media functions of your application. I hope this article will help you know how to use Android support library media compat to create applications with advanced media functions!