title: Expandable List Indicator
body: <p>I have an expandable list </p>
  
  <p>so two question  </p>
  
  <ol>
  <li><p>(I've seen somme similar question
  but never found the answer) How do I
  hide the arrow ( group indicator)
  when there's no children</p>
  
  <p>I tried to do it in the adapter</p>
  
  <pre><code>public View getGroupView(int groupPosition, boolean isExpanded, View convertView,ViewGroup parent) {
  if(getChildrenCount(groupPosition)==0) {
        // how do i hide the group indicator ?
  }
  </code></pre>
  
  <p>But I'm stuck So, how can modify the
  group indicator for empty groups ?</p></li>
  <li><p>How to have different behavior when
  you click on the arrow (expands the
  group) vs you click on the title of
  the group (go to an activity) </p></li>
  </ol>