title: How to save and restore the state of an ExpandableListView in Android?
body: <p>Is it possible to save and restore the state (which items are collapsed and which not) of an ExpandableListView in Android?</p>
  
  <p>If it is possible, how can I do that? </p>
  
  <p>Can I access the ExpandableListView in onPause() / onResume() and how?</p>