title: android notifyDataSetChanged for ExpandableListView not working
body: <p>In my app  I am working with <code>ExpandableListView</code>. I am using adapter which extends <code>BaseExpandableListAdapter</code>. I want to refresh the <code>ExpandableListView</code>.</p>
  
  <p>My <code>ExpandableListView</code> consists of items with delete button which links with database.
  If I'll press the delete button that item is permanently deleted from db. But the <code>listview</code> is not refreshing at the same time. If I again run that activity its refreshing but not at same time.
   I am using </p>
  
  <pre><code>mAdapter.notifyDataSetChanged();
  </code></pre>
  
  <p>but its not working as I want.
  Why?</p>