title: Get all fragments from backstack in order
body: <p>I am using <strong>Fragments</strong> in my app project. All the fragments are added to <strong>back stack</strong>:</p>
  
  <pre><code>...
  fragmentTransaction.addToBackStack(null);
  ...
  </code></pre>
  
  <p>Later on, what is the correct way to get all fragments from <strong>back stack</strong> in order ?</p>