如何在android屏幕解锁后恢复音乐

嗨，在我的应用程序中，当我单击电源按钮、主页按钮时，我需要停止音乐，后退按钮，所以我尝试使用下面的代码它的工作fn为主页和后退按钮…但我面临着电源按钮的问题…使用下面的代码，我可以停止声音，当我按下主页按钮，我的问题是我再次按下电源按钮时，声音正在播放，但我需要在解锁后恢复声音，因此，我采取了另一个falg Intent.ACTION_USER_PRESENT当我解锁屏幕时，这个falg正在调用，但在这个仅调用onresume（）的标志触发之前，因此，我无法写入屏幕解锁时的声音应该像这样播放。。有人建议我吗？谢谢

   public class MainMenu extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    DisplayMetrics displaymetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
     screenHeight = displaymetrics.heightPixels;
     screenWidth = displaymetrics.widthPixels;


     IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
     filter.addAction(Intent.ACTION_SCREEN_OFF);
     filter.addAction(Intent.ACTION_USER_PRESENT);

     BroadcastReceiver mReceiver = new ScreenReceiver();
     registerReceiver(mReceiver, filter); //register
    setContentView(R.layout.mainmenu);

}

@Override
protected void onPause() {
    // TODO Auto-generated method stub
    super.onPause();

    Log.i("","-----------onPause----------");

    if (mediaPlayer1 != null) {

        if (mediaPlayer1.isPlaying()) {

            mediaPlayer1.pause();
            Globalclass.length=mediaPlayer1.getCurrentPosition();

        }

           }

    if(Globalclass.power==1)
    {
         Globalclass.hmecount=1;
         Globalclass.backcount=0;
        if (mediaPlayer1 != null) {

            if (mediaPlayer1.isPlaying()) {

                mediaPlayer1.pause();
                Globalclass.lengthscreen=mediaPlayer1.getCurrentPosition();

            }
        }
    }

   }
   protected void onResume() {
 // TODO Auto-generated method stub
     super.onResume();

      if(Globalclass.hmecount==1)
      {
     mediaPlayer1 = MediaPlayer.create(MainMenu.this, R.raw.bgmusic);
        mediaPlayer1.seekTo(Globalclass.length);
          mediaPlayer1.setLooping(true);
        mediaPlayer1.start();

}
else if(Globalclass.backcount==1)

{
     mediaPlayer1 = MediaPlayer.create(MainMenu.this, R.raw.bgmusic);
      mediaPlayer1.setLooping(true);
        mediaPlayer1.start();
}
else if(Globalclass.power==2)
{

    mediaPlayer1 = MediaPlayer.create(MainMenu.this, R.raw.bgmusic);
    mediaPlayer1.seekTo(Globalclass.lengthscreen);
     mediaPlayer1.setLooping(true);
    mediaPlayer1.start();

}
else if(Globalclass.power==1)
{

}
     else 
{
     mediaPlayer1 = MediaPlayer.create(MainMenu.this, R.raw.bgmusic);
      mediaPlayer1.setLooping(true);
        mediaPlayer1.start();
}

Log.i("","----------length1------------"+Globalclass.length);
Log.i("","----------hmecount------------"+Globalclass.hmecount);
Log.i("","----------backcount------------"+Globalclass.backcount);
Log.i("","----------power------------"+Globalclass.power);

      }



@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    Log.i("-----------onDestroy----------","");


}



@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_HOME)) {
     Globalclass.hmecount=1;
     Globalclass.backcount=0;
  System.out.println("KEYCODE_HOME");

   Intent intent = new Intent(
         Intent.ACTION_MAIN);
          intent.addCategory(Intent.CATEGORY_HOME);
         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
         startActivity(intent);
        return true;
}
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
System.out.println("KEYCODE_BACK");
 Globalclass.backcount=1;
 Globalclass.hmecount=0;
 Intent intent = new Intent(
         Intent.ACTION_MAIN);
       intent.addCategory(Intent.CATEGORY_HOME);
   intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
       intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         startActivity(intent);
        finish();
       return true;
}


return false;
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); 
}
   }

public class ScreenReceiver extends BroadcastReceiver {
   @Override
public void onReceive(Context context, Intent intent) {
    if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
        // DO WHATEVER YOU NEED TO DO HERE
         Globalclass.power=1;

      } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
        // AND DO WHATEVER YOU NEED TO DO HERE
    }
    else if (intent.getAction().equals(Intent.ACTION_USER_PRESENT)){

         Globalclass.power=2;
    }
}
  }

---

尝试在活动中使用此功能：

public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if(hasFocus) 
       //play music
    else
      //pause music
}

---

当您的应用程序获得或失去焦点时，此api总是在活动中进行调整。我认为在您的情况下，最好在Mainfest文件中处理您的场景。如果解锁屏幕发生任何操作，请放置这些文件以允许您的应用程序接收广播消息

<receiver android:name=".ScreenReceiver">
<intent-filter>
<action android:name="android.intent.action.SCREEN_OFF"/>
<action android:name="android.intent.action.SCREEN_ON"/>
</intent-filter>
</receiver>

---

我希望这有帮助

嗨，谢谢..工作正常..但当屏幕显示顶部的一个条时，我不想要那个条

public class ScreenReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
     if (intent.getAction().equals(Intent.ACTION_SCREEN_ON))
     {
        Intent intent = new Intent();  
        intent.setClass(context, ScreenLockActivity.class);
        startActivity(intent);          
     }
     else if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF))
     {
      //Perform a specific action if you need
     }


}
}