in android, how would you extract the image from a imagebutton?

Question

I have two imagebutton and I want to switch the image of each other so button a will have button b's image while button b will have button a's image. I tried to do this in my code, but it does not work

Bitmap temmp = a1.getDrawingCache();
a1.setImageBitmap(a2.getDrawingCache());
a2.setImageBitmap(temmp);

Answer 1

follow like this

buttona.setOnClickListener(new View.OnClickListener()  {            
  public void onClick(View v)  { 
    ImageButton ib = (ImageButton)v;  
    Drawable d11 = ib.getDrawable(); // this is the image u can get from that button
} 

Answer 2

在使用getDrawingCache() setDrawingCacheEnabled(true)调用getDrawingCache()之前，需要启用图形缓存 。