使用計時器來改變圖像，但不工作

Question

當我使用這個計時器來改變圖像，它不工作。我試圖在計時器運行時更​​改圖像。我把這個計時器放在了onCreate裏面，好嗎？

Timer timer = new Timer("MetronomeTimer", true); 
    TimerTask tone = new TimerTask() { 

     int i=0; 
     @Override 
     public void run() { 

      img1.setImageResource(Images[i]); 
      i++; 

     } 
    }; 
    timer.scheduleAtFixedRate(tone, 500, 500); 

Answer 1

嘗試這樣：

private Handler handler = new Handler(); 
handler.postDelayed(runnable, 100); 

private Runnable runnable = new Runnable() { 
@Override 
public void run() { 
/* do what you need to do */ 
changeImage(); 
/* and here comes the "trick" */ 
handler.postDelayed(this, 100); 
} 
}; 

changeImage可以像

void changeImage() 
{ 
    runOnUiThread(new Runnable() { 

     @Override 
     public void run() { 
      // TODO Auto-generated method stub 
      img1.setImageResource(Images[i]); 
      i++; 
     } 
    }); 
}