title: How to add the middle Button in BottomBar layout android
body: <p>I want to add facebook messenger like oversized button in the middle of my bottombar layout but confused how to add..</p>
  
  <p><a href="https://i.stack.imgur.com/emSH3.png" rel="nofollow noreferrer">Facebook Messenger</a></p>
  
  <p><a href="https://i.stack.imgur.com/emSH3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/emSH3.png" alt=""></a></p>
  
  <p>I was using ahbottomnavigation library for making my bottombar.</p>