title: SwipeRefreshLayout not working
body: <p>I'm using <code>SwipeRefreshListener</code> from the support libraries.  I am calling <code>setRefresh</code> from <code>onPreExecute</code> and <code>onPostExecute</code> of my <code>AsyncTask</code>.  However, nothing changes, there is no animation.  Is there something that I'm missing?  Are there certain setup parameters I need to set in order for it to work properly?</p>