android多次調用runnable對象

Question

我試圖多次調用我的函數，其中包含可運行對象。 有人可以告訴我我做錯了什麼？

 handler = new Handler(); 

     sButton.setOnClickListener(new View.OnClickListener() 
     { 

      @Override 
      public void onClick(View v) 
      { 
       rounds = new Integer(et.getText().toString()); 
      // handler.removeCallbacksAndMessages(null); 
       for (int j = 0; j <= rounds; j ++) 
       { 
        f(); 
       } 
      } 
     }); 
    } 

    public void f() 
    { 
     r = new Runnable() 
     { 
      @Override 
      public void run() 
      { 
       mp = MediaPlayer.create(Box.this, R.drawable.sound1); 
       mp.setLooping(false); 
       mp.setVolume(1.0f, 1.0f); 
       mp.start(); 
       handler.postDelayed(this, 3000); 
      } 
     }; 
     handler.postDelayed(r, 4000); 
     mp.stop(); 

在此先感謝

Answer 1

退房這個 -

Handler handler; 
    sButton.setOnClickListener(new View.OnClickListener() 
      { 

       @Override 
       public void onClick(View v) 
       { 
        rounds = new Integer(et.getText().toString()); 
        for (int j = 0; j <= rounds; j ++) 
        { 
         f(); 
        } 
       } 
      }); 

    public void f() 
    { 
      r = new Runnable() 
      { 
       @Override 
       public void run() 
       { 

        handler = new Handler() { 
        public void handleMessage(Message msg) { 
        mp = MediaPlayer.create(Box.this, R.drawable.sound1); 
        mp.setLooping(false); 
        mp.setVolume(1.0f, 1.0f); 
        mp.start(); 
        handler.sendEmptyMessageDelayed(1,3000);//3 sec 
        msg.what = 2;//removing first executed handler this is u missing. 
        }; 
       }; 
       handler.sendEmptyMessageDelayed(1,4000);//4sec 
       } 
      } 
    }