title: How can I fold all ChildView Group in Android ExpandableList Item?
body: <p>How can I fold all ChildView Group in <code>Expandable List</code>. Now I have two buttons to control Expand All and Fold All on Activity. Expandable button is OK and it is working work but I don't know how to fold all ChildView Group. How can i do this ?</p>
  
  <p>Thanks</p>
  
  <pre><code>**expandableListView.expandGroup(position, true); = OK&lt;Br&gt;
  
  expandableListView.foldGroup(position) = ? or ?**
  </code></pre>