Android开发如何利用代码控制设备上的音乐播放器播放音乐

实现效果如下图：
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实现方法：

这部分的代码主要是为了控制的实现音乐的播放和暂停，有需要的朋友的可以记录下来，方便以后能用到。

private long eventtime = 0;
 private AudioManager vAudioManager = null; 
 //此处在onCreate方法中初始化 
 eventtime = SystemClock.uptimeMillis();
 vAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);


 //这是播放或者暂停
 if (vAudioManager.isMusicActive()){
  Toast.makeText(getApplicationContext(), "有音乐在播放---暂停", Toast.LENGTH_SHORT).show();
  pauseMusic();//暂停
 }else {
  Toast.makeText(getApplicationContext(), "无音乐在播放--开始", Toast.LENGTH_SHORT).show();
  playMusic();//播放
 }

这部分主要是控制上一曲和下一曲

 /**
 * 暂停
 */
private void pauseMusic() {
 if (eventtime<=0)return;
 Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
 downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
 sendOrderedBroadcast(downIntent, null);

 Intent upIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
 upIntent.putExtra(Intent.EXTRA_KEY_EVENT, upEvent);
 sendOrderedBroadcast(upIntent, null);
}

/**
 * 播放
 */
private void playMusic() {
 if (eventtime<=0)return;
 Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY, 0);
 downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
 sendOrderedBroadcast(downIntent, null);

 Intent upIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY, 0);
 upIntent.putExtra(Intent.EXTRA_KEY_EVENT, upEvent);
 sendOrderedBroadcast(upIntent, null);
}


/**
 * 上一曲
 */
private void lastMusic() {
 if (eventtime<=0)return;
 Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS, 0);
 downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
 sendOrderedBroadcast(downIntent, null);

 Intent upIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PREVIOUS, 0);
 upIntent.putExtra(Intent.EXTRA_KEY_EVENT, upEvent);
 sendOrderedBroadcast(upIntent, null);
}

/**
 * 下一曲
 */
private void nextMusic() {
 if (eventtime<=0)return;
 Intent downIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_NEXT, 0);
 downIntent.putExtra(Intent.EXTRA_KEY_EVENT, downEvent);
 sendOrderedBroadcast(downIntent, null);

 Intent upIntent = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
 KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_NEXT, 0);
 upIntent.putExtra(Intent.EXTRA_KEY_EVENT, upEvent);
 sendOrderedBroadcast(upIntent, null);

最后是控制系统每天的音量大小

 // 调低音量
 vAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);

 // 调高音量
 vAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);

最后

以上就是利用代码控制设备上音乐播放的实现方法，希望对大家的学习或工作有一定的参考价值，如果大家有疑问，欢迎评论留言，谢谢大家的支持。

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