title: Android GridView not standard divider
body: <p>How to make divider in <code>GridView</code> like this?
  I don't have enough rating to post images, please look at the picture:</p>
  
  <p><img src="https://i.stack.imgur.com/MhukO.jpg" alt="picture"></p>
  
  <p>I didn't find answer in other questions at stackoverflow.com.</p>
  
  <p>Thanks.</p>