title: How to show in Action bar, only if it can fit with text?
body: <p>I am having the following buttons, with some ic_menu icons: <code>Register</code>, <code>Clear</code>.</p>
  
  <p>I want them, in whatever device(smartphone or tablet), to be shown if they can fit, including their text.</p>
  
  <p>If i use on both them: <code>withText|ifRoom</code>, on smartphone they appear both, without their text on portrait, and landscape with text.
  On tablet they appear both with text.</p>
  
  <p>I want them, on smartphone, NOT to appear if they cant fix with their text too.
  Are any other combinations ?</p>
  
  <p>Also what is <code>collapseActionView</code> for?</p>