解决GridView图片溢出内存的问题

@Override 
protected void onPause() 
{ 
   GridView gridView = 
   (GridView) findViewById(R.id.public_photos); 
   int count = gridView.getCount(); 
   for(int i = 0; i < count; i++) { 
       ImageView v = (ImageView) gridView.getChildAt(i); 
       if (v != null) { 
          if (v.getDrawable() != null) 
            v.getDrawable().setCallback(null); 
       } 
    } 
   super.onPause(); 
}