title: How to keep the same fragment when activity restarts due to orientation change in a Navigation Drawer Activity
body: <p>I found many post explaining how get the <code>Fragment</code> from the <code>savedInstanceState</code> <code>Bundle</code> but, because the <code>Activity</code> can swap between 4 <code>Fragments</code>, i need a way to know <strong>which Fragment was alive</strong> before rotate when the orientation started to change.</p>
  
  <p>The reason i have several Fragments is because i am using Navigation Drawer, so each menu item as a fragment.</p>