title: Android - How to Set a semi-transparent layout?
body: <p>I'm new to android application.  <img src="https://i.stack.imgur.com/94X8c.png" alt="enter image description here"></p>
  
  <p>In this picture,there is a bottom layout with some options like play,delete etc.., and has its transparency to show its background.</p>
  
  <p>How to I get like that ?</p>