title: Full-width Spinner in ActionBar
body: <p>I'd really like my app to have a Spinner which stretches the entire length of my ActionBar, like the one in Gmail 4.0. Anyone know how to achieve this? Even if I set "match_parent" in the Spinner layout resource, it doesn't fill the entire bar. Preferably, I'd like to be able to have it fill the entire bar except for my action items, rather than using the split actionbar as well.</p>
  
  <p><strong>EDIT</strong>: see my answer below for an implementation using the built-in actionbar, or hankystyles' when using a custom view</p>
  
  <p><img src="https://i.stack.imgur.com/FhHRJ.png" alt="enter image description here"></p>