title: Put a button over an ImageView
body: <p>I'm newbie in Android.</p>
  
  <p>I would like to know if it's possible to put a button or another component over an ImageView. I've tried setting the image as a background image of a LinearLayout, but when I change between landscape and portrait mode, the image porportions are changed.</p>
  
  <p>Thanks a lot.</p>