Question

I want imageview to become brighter when an user presses (clicks) it, but without an additional image for that state. Is it possible?
We know we have selectors where 2 different images can be used, but I would like to have a selector, a drawable from XML, and one real image.

Answer 1

OK, I got it working. Add

implements OnTouchListener

to the definition of your activity, add

.setOnTouchListener(this);

to all your imageviews that must respond to click with getting brighter, and add:

@Override
public boolean onTouch(View pV, MotionEvent pEvent) {
    if(pEvent.getAction() == MotionEvent.ACTION_DOWN){
        ((ImageView)pV).setAlpha(128);
    }
    else if(pEvent.getAction() == MotionEvent.ACTION_UP){
        ((ImageView)pV).setAlpha(255);
    }
    return true;
}    

to your activity. That’s all.