How to clear an ImageView in Android?
I used to do it with the dennis.sheppard solution:
viewToUse.setImageResource(0);
it works but it is not documented so it isn't really clear if it effects something else in the view (you can check the ImageView code if you like, i didn't).
I think the best solution is:
viewToUse.setImageResource(android.R.color.transparent);
I like this solution the most cause there isn't anything tricky in reverting the state and it's also clear what it is doing.
I had a similar problem, where I needed to basically remove ImageViews from the screen completely. Some of the answers here led me in the right direction, but ultimately calling setImageDrawable() worked for me:
imgView.setImageDrawable(null);
(As mentioned in the comment, such usage is documented in the official docs: ImageView#setImageDrawable.)