我怎麼能離開我的應用程序使用了這個錯誤

Question

我創建了一個卡拉OK應用。但是我無法停止MediaPlayer出錯。當我按下後退按鈕返回到家裏，我得到「抱歉，應用程序已停止工作」同樣的事情發生，如果我嘗試啓動另一個活動

public class Main extends Activity implements MediaPlayerControl { 
private MediaController mMediaController; 
private MediaPlayer mMediaPlayer; 
Handler mHandler = new Handler(); 
public TextView subtitles,subtitles2; 

static Context context; 

@SuppressLint("HandlerLeak") 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 
    setContentView(R.layout.Main); 

    subtitles = (TextView) findViewById(R.id.subs2); 
    subtitles2 = (TextView) findViewById(R.id.subs21); 

    mMediaPlayer = new MediaPlayer(); 
    mMediaController = new MediaController(this) 
    /* 
    * { 
    * 
    * @Override public void hide() { mMediaController.show(0); } } 
    */; 

    mMediaController.setMediaPlayer(Main.this); 
    mMediaController.setAnchorView(findViewById(R.id.AudioView)); 
    mMediaController.setPrevNextListeners(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // Next button clicked 
      Intent intent = new Intent(Main.this, Hello.class); 
      startActivity(intent); 

     } 
    }, new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // Previous button clicked 
      Intent intent = new Intent(Main.this, Sorry.class); 
      startActivity(intent); 
     } 
    }); 

    // String audioFile = "" ; 
    try { 
     mMediaPlayer.setDataSource(this, Uri 
       .parse("android.resource://com.app.suadmon/raw/buchatri")); 
     mMediaPlayer.prepare(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    mHandler = new Handler() { 

     @Override 
     public void handleMessage(Message msg) { 
      // TODO Auto-generated method stub 
      super.handleMessage(msg); 
      final long currentPos = mMediaPlayer.getCurrentPosition(); 
      if (currentPos < 5130) { 
       subtitles.setText("1111+"); 

      } else if (currentPos > 5130 && currentPos < 10572) { 
       subtitles.setText("555+"); 

      } else if (currentPos > 10572 && currentPos < 10597) { 
       subtitles.setText("666+"); 

      } else if (currentPos > 15312 && currentPos < 18478) { 
       subtitles.setText("777+"); 

      } else if (currentPos > 18478 && currentPos < 24191) { 
       subtitles.setText("888+"); 

      } else if (currentPos > 24191 && currentPos < 28137) { 
       subtitles.setText("999+"); 

      } else if (currentPos > 28137 && currentPos < 29500) { 
       subtitles.setText("Thank you"); 
       subtitles2.setText("............."); 
      } 
      mHandler.sendEmptyMessageDelayed(0, 1); 
     } 
    }; 
    mHandler.sendEmptyMessage(0); 

    mMediaPlayer.setOnPreparedListener(new OnPreparedListener() { 
     public void onPrepared(MediaPlayer mp) { 
      mHandler.post(new Runnable() { 
       public void run() { 
        mMediaController.show(0); 
        // mMediaPlayer.reset(); 
        mMediaPlayer.start(); 
       } 
      }); 
     } 
    }); 

    mMediaPlayer.setOnCompletionListener(new OnCompletionListener() { 

     @Override 
     public void onCompletion(MediaPlayer mp) { 
      // TODO Auto-generated method stub 
      Intent stopplay = new Intent(Main.this, Hello.class); 
      startActivity(stopplay); 
     } 
    }); 
} 

protected void onDestroy() { 
    super.onDestroy(); 
    mMediaPlayer.stop(); 
    mMediaPlayer.release(); 
} 
public void releaseMediaPlayer(){ 
    if(mMediaPlayer != null){ 
     mMediaPlayer.release(); 
     mMediaPlayer = null; 
    } 
} 

public boolean canPause() { 
    return true; 
} 

public boolean canSeekBackward() { 
    return true; 
} 

public boolean canSeekForward() { 
    return true; 
} 

public int getBufferPercentage() { 
    int percentage = (mMediaPlayer.getCurrentPosition() * 100) 
      /mMediaPlayer.getDuration(); 
    return percentage; 
} 

public int getCurrentPosition() { 
    return mMediaPlayer.getCurrentPosition(); 
} 

public int getDuration() { 
    return mMediaPlayer.getDuration(); 
} 

public boolean isPlaying() { 
    return mMediaPlayer.isPlaying(); 
} 

public void seekTo(int pos) { 
    mMediaPlayer.seekTo(pos); 

} 

@Override 
public void pause() { 
    // TODO Auto-generated method stub 
    mMediaPlayer.pause(); 

} 

protected void onPause() { 
    super.onPause(); 
    mMediaPlayer.getCurrentPosition(); 
    mMediaPlayer.pause(); 
} 

protected void onResume() { 
    super.onResume(); 
    mMediaPlayer.seekTo(0); 
    mMediaPlayer.start(); 
} 

// public void onUserLeaveHint(){ 
// mMediaPlayer.stop(); 
// super.onUserLeaveHint(); 
// } 
/* 
* public void stopPlayback(){ mMediaPlayer.stop(); } 
*/ 

public void start() { 
    mMediaPlayer.start(); 
} 

public boolean onTouchEvent(MotionEvent event) { 
    mMediaController.show(0); 
    return false; 
} 

@Override 
public void onBackPressed() { 
    // TODO Auto-generated method stub 
    finish(); 
    Intent intent = new Intent(Main.this, Show.class); 
    startActivity(intent); 
    super.onBackPressed(); 
} 

}

和日誌目錄的位置。 我該如何解決這個問題。我不知道。 任何人都可以幫助我。請 ！！！

Answer 1

你需要停下來，你的活動結束之前釋放的媒體播放器。嘗試添加這對你的活動：

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    if(mMediaPlayer != null) 
    { 
    mMediaPlayer.stop(); 
    mMediaPlayer.release(); 
    } 
}