Android保活之循环播放无声音乐

小鱼儿 2022-01-17 09:53 1196阅读 0赞

# Android保活之循环播放无声音乐 #

### 基本思想 ###

1，循环播放无声的音乐  
2，在其它音乐占用时，合理的控制音乐的再次播放

### 实现效果 ###

目前测试在华为机器上，一键清理不会杀死。

在三星Galaxy Note4上，  
该方法＋前台服务达到播放器的效果，一键清理不会清理

### 代码实现 ###

主代码

public class MusicService extends Service {
    
        private final String TAG = "MusicService";
    
        private MediaPlayer mMediaPlayer;
    
        private AudioManager mAudioManager;
    
        private AudioManager.OnAudioFocusChangeListener mAudioFocusChange = new
                AudioManager.OnAudioFocusChangeListener() {
                    @Override
                    public void onAudioFocusChange(int focusChange) {
                        switch (focusChange) {
                            case AudioManager.AUDIOFOCUS_GAIN:
                                Log.e(TAG, "AUDIOFOCUS_GAIN");
                                try {
                                    startPlayMusic();
                                } catch (Exception e) {
                                    e.printStackTrace();
                                }
                                break;
                            case AudioManager.AUDIOFOCUS_LOSS:
                                Log.e(TAG, "AUDIOFOCUS_LOSS");
                                mAudioManager.abandonAudioFocus(mAudioFocusChange);
                                break;
                            case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
                                Log.e(TAG, "AUDIOFOCUS_LOSS_TRANSIENT");
                                break;
                            case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
                                Log.e(TAG, "AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK");
                                break;
                        }
                    }
                };
    
        public MusicService() {
    
        }
    
        @Override
        public IBinder onBind(Intent intent) {
            // TODO: Return the communication channel to the service.
            throw new UnsupportedOperationException("Not yet implemented");
        }
    
        @Override
        public int onStartCommand(Intent intent, int flags, int startId) {
            //音标处理
            mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
            if (mAudioManager != null)
                mAudioManager.requestAudioFocus(mAudioFocusChange, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
    
            mMediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.no_notice);
            mMediaPlayer.setLooping(true);
    
            startPlayMusic();
    
            return START_STICKY;
        }
    
    
        private void startPlayMusic() {
            if (mMediaPlayer != null && !mMediaPlayer.isPlaying()) {
                Log.e(TAG, "启动后台播放音乐");
                mMediaPlayer.start();
            }
        }
    
        private void stopPlayMusic() {
            if (mMediaPlayer != null) {
                Log.e(TAG, "关闭后台播放音乐");
                mMediaPlayer.stop();
            }
        }
    
        @Override
        public void onDestroy() {
            super.onDestroy();
            stopPlayMusic();
            Log.e(TAG, TAG + "---->onDestroy,停止服务");
        }
    
    
    }

配置文件

启动该服务

startService(new Intent(context, MusicService.class));

好人做到底，附上无声音乐的下载地址  
[点我下载，没有积分的联系微信公众号“Android唐浮”][Android]

## 联系 ##

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[Android]: https://download.csdn.net/download/u011368551/11096610