title: remove activity from stack
body: <p>I am developing an application in android. I am new in android.
  In my application I have a category selection activity from that user have to check a check-box, based on that he will get view on another screen. I have a menu button in 3rd screen in that I have a button for selecting category, when I click on that button its also works fine but when I click back button it will redirect me 2 times at same activity... How to remove this problem? I have used <code>finish()</code> method but its also creates problem its get's me out from the application directly...
  I want redirect to selection activity and it should not show me 2 times when I click back button ....</p>
  
  <p>Is there any way please redirect me thank you.</p>