title: OnResume() not called by Pressing back Button in ActivityGroup
body: <p>As ActivityGroup manages the Activities in the form of view, so when I try to return back to the Parent Activity that called the child Activity in ActivityGroup the onResume() is not being called.</p>
  
  <p>I tried calling the OnResume() like this.</p>
  
  <pre><code>((Activity)view.getContext()).onResume();
  </code></pre>
  
  <p>But its not working, instead finish() is working is fine for me.</p>
  
  <pre><code>((Activity)view.getContext()).finish();
  </code></pre>
  
  <p>So, I am able to get the Activity from the View, but not able to call the onResume(), any idea will be appreciable.</p>