檢查條件（繪製==繪製）

Question

 sorry to ask question already asked. but i am helpless 
    in my programi have 27 imageview's which can display any of the 3 drawable's i have in my drawable's folder.. and i want these imageview's click to perform a different action for each drawable they contain..but i found that we won't be able to compare two drawable's for equality.... 

這是我寫的代碼，沒有工作....

如果（（（ImageView的）爲arg0）.getDrawable（）！= getResources（ ）.getDrawable（R.drawable.sq））

我已經使用了它，但沒有人清楚....他們說我們可以使用setTag（）方法，但我無法弄清楚如何。所以請可憐我，告訴我如何使用setTag（）來解決我的問題，例如

Answer 1

使用setTag（）非常簡單。無論你使用void setTag（Object tag），你只是提供一個對象來標識你的drawable（通常是一個String），或者如果你需要存儲多個屬性，你可以使用void setTag（int key，Object tag）來提供一個整數鍵。

代碼示例（此代碼尚未經過測試，但它應該解釋一下我的意思本身）：

class MyActivity extends Activity { 

private static final String FIRST_IMAGE = "firstImage"; 
private static final String SECOND_IMAGE = "secondImage"; 

protected void onCreate (Bundle savedInstanceState) { 
// Instantiation 
ImageView imageView = (ImageView) findViewById(R.id.imgview); 
imageView.setImageResource(R.drawable.firstimage); 
imageView.setTag(FIRST_IMAGE); // The view is now tagged, we know this view embeds the first image 
imageView.setOnClickListener(new ImageClickListener()); 

ImageView anotherImageView = (ImageView) findViewById(R.id.secondimgview); 
anotherImageView.setImageResource(R.drawable.firstimage); 
anotherImageView.setTag(FIRST_IMAGE); // The view is now tagged, we know this view embeds the first image 
anotherImageView.setOnClickListener(new ImageClickListener()); 

ImageView secondImageView = (ImageView) findViewById(R.id.thirdimgview); 
secondImageView.setImageResource(R.drawable.secondimage); 
secondImageView.setTag(SECOND_IMAGE); // The view is now tagged, we know this view embeds the second image 
secondImageView.setOnClickListener(new ImageClickListener()); 
} 

private class ImageClickListener implements View.OnClickListener { 

// The onClick method compares the view tag to the different possibilities and execute the corresponding action. 
    public void onClick(View v) { 
     String tag = (String) v.getTag(); 
     if (v.getTag() == FIRST_IMAGE) { 
      // perform specific action 
     } else if (v.getTag() == SECOND_IMAGE) { 

     } 
    } 
} 

}