PowerManager pm= (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);    if(!pm.isScreenOn())    {      //熄屏狀態    }

public class ScreenReceiver extends BroadcastReceiver {  @Override  public void onReceive(Context context, Intent intent) {    if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {      //收到亮屏廣播    } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {//收到熄屏廣播    }  }  }

//注冊廣播ScreenReceiver sOnBroadcastReciver=new ScreenReceiver();    IntentFilter recevierFilter=new IntentFilter();    recevierFilter.addAction(Intent.ACTION_SCREEN_ON);    recevierFilter.addAction(Intent.ACTION_SCREEN_OFF);    registerReceiver(sOnBroadcastReciver, recevierFilter);//取消注冊if(sOnBroadcastReciver!=null)    {      unregisterReceiver(sOnBroadcastReciver);    }