发布于 2016-02-22 23:58:39 | 220 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的精品教程，程序狗速度看过来！

Android移动端操作系统

Android是一种基于Linux的自由及开放源代码的操作系统，主要使用于移动设备，如智能手机和平板电脑，由Google公司和开放手机联盟领导及开发。尚未有统一中文名称，中国大陆地区较多人使用“安卓”或“安致”。

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在手机上播放音乐的时候，我们希望监听电话的状态，当然在MID上没有电话功能，不需要监听

如下代码是监听电话的状态，代码简单不做介绍直接看代码：

 private boolean mResumeAfterCall = false;
 private PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
  @Override
  public void onCallStateChanged(int state, String incomingNumber) {
   if (state == TelephonyManager.CALL_STATE_RINGING) {
    AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    int ringvolume = audioManager
      .getStreamVolume(AudioManager.STREAM_RING);
    if (ringvolume > 0) {
     mResumeAfterCall = (player.isPlaying() || mResumeAfterCall);
     try {
      stub.pause();
     } catch (RemoteException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }
    }
   } else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
    // pause the music while a conversation is in progress
    mResumeAfterCall = (player.isPlaying() || mResumeAfterCall);
    try {
     stub.pause();
    } catch (RemoteException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   } else if (state == TelephonyManager.CALL_STATE_IDLE) {
    // start playing again
    if (mResumeAfterCall) {
     // resume playback only if music was playing
     // when the call was answered
     try {
      stub.resume();
     } catch (RemoteException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }
     mResumeAfterCall = false;
    }
   }
  }
 };

使用的时候呢，就在service 的oncreate 里面添加，如下：

 public void onCreate() {
  player = new MediaPlayer();
  super.onCreate();
  TelephonyManager tmgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
  tmgr.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
  IntentFilter filter = new IntentFilter();

  filter.addAction(SERVICECMD);
  filter.addAction(PAUSE_ACTION);
  receiver = new MusicServiceReceiver();
  registerReceiver(receiver, filter);
 }

在ondestroy 里面删除就可以了

 public void onDestroy() {
  // Log.e(TAG, "onDestroy" +player.isPlaying() );
  // System.out.println("onDestroy");
  unregisterReceiver(receiver);
  player.release();
  player = null;

  TelephonyManager tmgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
  tmgr.listen(mPhoneStateListener, 0);
  super.onDestroy();
 }