title: Expandeble menu using sliding menu
body: <p>I want to implement sliding menu in my application with some different requirment.I got the working sample for simple sliding menu and it just works fine.</p>
  
  <p>But i want to implement expandable menu using sliding menu.In which when user selects main menu then submenu appears below it and menu expands itself so that user can scroll down to see other menu too (Same as expandable listview).</p>
  
  <p><img src="https://i.stack.imgur.com/ZP8aG.png" alt="enter image description here"></p>
  
  <p>How can i do it? Please help me!</p>