title: Replacing an ActionBar menu item icon with an indeterminate ProgressBar
body: <p>I would like to add an indeterminate progress bar to the Honeycomb ActionBar, so that any time the user presses "Refresh", the refresh icon temporarily turns into an indeterminate progress bar, until the task completes. The Email app does this already, but I can't figure out how.</p>
  
  <p>Any advice?</p>