title: Refresh listview in fragment upon returning from fragment detail
body: <p>My application has a principal activity with an action bar and a tabs menu.</p>
  
  <p>Every tab is a fragment with a listview.</p>
  
  <p>When I click in listview, fragment detail is open.</p>
  
  <p>When I click the back button, listview appears but sometimes not all the elements appear; some of them appear in white.</p>
  
  <p>If I touch refresh, it appears fine.</p>
  
  <p>The <code>onActivityResult</code> doesn't execute.</p>
  
  <p>My idea was to do <code>notifyDataSetInvalidated()</code> from refresh.</p>
  
  <p>How can I do that?</p>