title: Android: Use spinner in a sub tab
body: <p>I'm trying to put a spinner in a sub-tab in my android app.  Touching the spinner causes a crash.  </p>
  
  <p>Searching seems to suggest that for some reason it is not possible to use spinners in sub-tabs, but this seems silly to me.  I've also tried using activity groups as an alternative to sub-tabs, but I get the same crash.  </p>
  
  <p>Has anyone resolved this?</p>