ANDroid SUPPORT LIBRARY Media Compat Frequently Asks Frequency Questions Answers

ANDroid SUPPORT LIBRARY Media Compat Frequently Asks Frequency Questions Answers Android Support Library Media Compat is a library for multiple versions of media functions in Android applications.This library provides a set of compatible categories and methods that enable developers to use the same code on different Android versions to achieve media -related functions.In this article, we will answer the problems that some developers often encounter when using Android Support Library Media Compat and provide some Java code examples. Question 1: How to add Android Support Library Media Compat Library to Application? To add Android Support Library Media Compat Library to the application, you first need to add the following dependencies to the project's built.gradle file: dependencies { implementation 'com.android.support:mediacompat:28.0.0' } Then, the required class is introduced in the code: import android.support.v4.media.session.MediaSessionCompat; import android.support.v4.media.MediaMetadataCompat; ... Question 2: How to create a MediaSessionCompat object? To create a MediaSessionCompat object, you need to use MediaSessionCompat.builder.You can create one in the onCreate () method in Activity or Services: private MediaSessionCompat mMediaSession; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ... mMediaSession = new MediaSessionCompat(this, "MyMediaSession"); ... } Question 3: How to set metadata for the MediaSessionCompat object? You can use MediaMetAdataCompat.builder to set metadata.The following is an example of setting song information: MediaMetadataCompat.Builder builder = new MediaMetadataCompat.Builder(); builder.putString(MediaMetadataCompat.METADATA_KEY_TITLE, "Song Title"); builder.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, "Artist Name"); builder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, "Album Name"); MediaMetadataCompat metadata = builder.build(); mMediaSession.setMetadata(metadata); Question 4: How to deal with the media button in the application? When a user clicks the headset or other external media buttons, you can handle these media buttons in the application to click the event.The following is an example code: @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_MEDIA_PLAY) { // Process the play button click event } else if (keyCode == KeyEvent.KEYCODE_MEDIA_PAUSE) { // Process the pause button click event } else if (keyCode == KeyEvent.KEYCODE_MEDIA_NEXT) { // Process the next button click event } else if (keyCode == KeyEvent.KEYCODE_MEDIA_PREVIOUS) { // Process the previous button click event } return super.onKeyDown(keyCode, event); } Question 5: How to deal with changes in the media playback status in the application? To deal with changes in media playback status, you can use MediaSessionCompat.Callback and PlaybackStateCompat.The following is a sample code that process changes in play status: private MediaSessionCompat.Callback mMediaSessionCallback = new MediaSessionCompat.Callback() { @Override public void onPlay() { // Treatment of playback status } @Override public void onPause() { // Treatment pause state } @Override public void onSkipToNext() { // Process the next status } @Override public void onSkipToPrevious() { // Treatment the previous state } }; // Set callback after creating MediaSessionCompat mMediaSession.setCallback(mMediaSessionCallback); We hope this article can help you solve some common problems encountered when using Android Support Library Media Compat framework.If you have more questions about certain issues, please consult the official document or developer community to get more detailed answers and support.