title: Fragments - Do you have to use an Activity Wrapper around a fragment which comprises the whole Activity?
body: <p>Consider the sample app from <a href="http://developer.android.com/images/fundamentals/fragments.png">developers.android.com</a></p>
  
  <p>This describes using Fragments like so:</p>
  
  <ul>
  <li>On a Phone you can use Fragment 1 on Activity A and fragment 2 on Activity B. </li>
  <li>On a tablet you have more real estate so you use Fragment 1 and Fragment 2 on Activity A.</li>
  </ul>
  
  <p>Great! ... But... On the first example (the one with a phone) you create an Activity with an xml file containing a single <code>&lt;fragment&gt;</code> and that's all, in the activity you only call <code>setContentView()</code> on that xml? That seems like a lot of redundant code (Activity, XML &amp; Fragment to display a Fragment): Can you set a <code>Fragment</code> as an <code>Activity</code> or is a Wrapper with XML always required?</p>