title: Differenciate the `layout_gravity` and `layout_centerVertical` function
body: <p>Do <code>layout_gravity="center_vertical"</code> and <code>layout_centerVertical="true"</code> will result the same thing in the different layouts?</p>
  
  <p>All the answers previously mentioned for this question said these attributes work for different layouts but nobody told about their actual function.</p>