title: How to finish all Activities except Main Activity and call another Activity
body: <p>I am implementing Drawer Navigation in my Application. On click of each item of drawer menu list i am  calling another Activity and this Drawer Navigation is implemented in every activity.</p>
  
  <p>Now i want to clear BackStack while calling an activity on each item click, so if i press back button then there should not be the previous activity from which user jumped to the current activity.</p>