title: Android - Detect `App Became Active' from Mulitiasking?
body: <p>I have developed an Android App that contains a list of information. I want the list to retrieve new data from the sever whenever the app 'wakes up' from multasking. Right now it just displays the old data and does not refresh.</p>
  
  <p>Can someone tell me what function/method I am looking for?</p>