title: Hide divider without hiding childDivider on ExpandableListView
body: <p>I can't find a way to hide dividers on an ExpandableListView without hiding the child dividers too.</p>
  
  <p>Here is my code.</p>
  
  <pre><code>&lt;ExpandableListView 
              android:id="@+id/activities_list"
              android:background="@android:color/transparent"
              android:fadingEdge="none"           
              android:groupIndicator="@android:color/transparent"
              android:divider="@android:color/transparent"
              android:childDivider="@drawable/list_divider"
              android:layout_width="fill_parent"
              android:layout_height="wrap_content" /&gt;
  </code></pre>
  
  <p>With this code, I get no dividers on groups but no child dividers neither. If I set <code>android:divider</code> to <code>"@drawable/list_divider"</code> I get both group and child dividers.</p>
  
  <p>Thanks in advance!</p>