Is there a way to fill parent minus a fixed number in Android RelativeLayout?

android, android-imagebutton, android-relativelayout, fill-parent

Solution

Put a `android:layout_margin="10dp"` on the ImageButton, along with the

android:layout_width="fill_parent"
android:layout_height="fill_parent"

Problem

I have an `ImageButton` that I want to fill its parent `RelativeLayout` container for its width but minus a few `dp` so it has some left and right padding. I tried `fill_parent-10dp` but that causes an error and doesn't render.

Original source