title: Is there a way to fill parent minus a fixed number in Android RelativeLayout?
body: <p>I have an <code>ImageButton</code> that I want to fill its parent <code>RelativeLayout</code> container for its width but minus a few <code>dp</code> so it has some left and right padding. I tried <code>fill_parent-10dp</code> but that causes an error and doesn't render.</p>