title: Collapse all group except selected group in expandable listview android
body: <p>I'm developing android application using expandable list view. Actually what I need is, I'm listing group, which contains child. </p>
  
  <p>If I select an unexpandable group, it should expand, after I ll select second group at that time the first group should be collapsed. I did Google, but I couldn't find what I want. Please help me out.</p>