title: How to make an empty space between Expandable ListView groups
body: <p>Can somebody tell me how to make an empty space between the groups of Expandable ListView. I tried many solutions but whenever I give height to divider it always increase the height of child divider too. I tried separately <code>android:divider="@drawable/group_separator"</code> and <code>android:childDivider="@drawable/child_separator"</code>  and also tried to set the height programmatically separately in <code>getChildView</code> and in <code>getGroupView</code> but the same result. It always increase the space between child divider too but i just want to make space only between the groups even if there no item between them. Like to give the space of <code>40dp</code> even if there is no item just like in the below image. Any help will be highly appreciated. Thanks in advance.</p>
  
  <p><img src="https://i.stack.imgur.com/Lg1cO.png" alt="enter image description here"></p>
  
  <p>and after I applied the divider height it become like</p>
  
  <p><img src="https://i.stack.imgur.com/4fLii.png" alt="enter image description here"></p>