title: How to refresh fragments 'onResume?'
body: <p>I want to refresh fragments from an Actvitiy. (Let's call the activity A)
  Activity A contains the fragments. </p>
  
  <p>When I finish Activity B then Activity A should refresh the fragments. </p>
  
  <p>I was thinking this would be done in onResume? I tried simply restarting the activity through an intent but that's not usability friendly. </p>
  
  <p>So how do I refresh fragments when I resume an activity? </p>