title: pausing and resuming child activities in ActivityGroup
body: <p>I am making a first try att creating a custom ActivityGroup. I am getting everything working except the activity lifecycle methods of the groups child activities. How can i call the onResume/onPause methods in my child activities when they enter/exit focus?</p>
  
  <p>I know the tabActivity does this but i cannot find how when looking through the code.</p>
  
  <p>Thanks in advance!</p>