title: Difference between a clickable ImageView and ImageButton
body: <p>I'm just wondering if there is any significant difference between an <code>ImageView</code> that's set to be clickable, compared with an <code>ImageButton</code>?  </p>
  
  <p>Is there any reason for using one over the other? Is there any restriction on the drawable for an <code>ImageButton</code> that leaves <code>ImageView</code> as the only possible option?  </p>
  
  <p>Will I possibly lose any functionality of a button if I opt for a clickable <code>ImageView</code> over <code>ImageButton</code>?</p>