title: Circular button with shadow like 5.0 FAB
body: <p>I want a button in circular shape with shadow. Shadow must be like FAB. Currently I'm using a png to implement the button.</p>
  
  <p><a href="https://i.stack.imgur.com/sjKAq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sjKAq.png" alt="enter image description here"></a>
  </p>
  
  <p>But when I use this image I can't give correct pressed state changes.
  Is there any way to impleament this by using xml</p>