title: Trasparent pannel in android activity
body: <p>I am new to android please can any one tell me how to develop the transparent pannel in android activity just has shown in the following image. 
  <img src="https://i.stack.imgur.com/VcRGL.jpg" alt="http://cdn.cultofandroid.com/wp-content/uploads/2013/08/Screen-Shot-2013-08-15-at-3.50.58-PM-640x560.jpg">
  Thanks in advance!</p>