How to clear ImageView correctly?

问题

For example, in my Activity I have such code (I skip the initialization of variables):

ImageView iview; //some ImageView
Bitmap b; //some Bitmap
iview.setImageBitmap(b);

Question is - how to clear iview resources correctly (with or without destroying view) ? Would ImageView free it's resources (used in native code) after b.recycle()?

I suppose, that ImageView doesn't just free it resources after Activity onStop (or onDestroy).

回答1:

imgview.setImageResource(0);

or

imgview.setImageDrawable(null);

回答2:

no you need to unbindDrawables, you can do it by setting iview.setImageDrawable(null);

回答3:

You can use frequently it works:

imageView.setImageResource(0);

回答4:

viewToUse.setImageResource(android.R.color.transparent);

• I think using setImageResource with a color identifier will give you crashing issues on Android 2.2.1, make sure to test it.

回答5:

if nothing is working for you try setting the background color of view to layout color.if my layout color is white u can do like this:

 edit_countflag.setBackgroundColor(Color.parseColor("#ffffff"));
//then set the image
 edit_countflag.setImageResource(R.drawable.flag_id);

来源：https://stackoverflow.com/questions/9498094/how-to-clear-imageview-correctly