title: Android pattern lock/unlock screen programmatically
body: <p>Part of my app is to lock screen using a certain pattern the user chooses and unlocks it with the same pattern. I wish to use the same android default Pattern lock screen.  I want the user to be able to set up multiple patterns and unlock the screen with these patterns.</p>
  
  <p>Any ways I can do that? Is there some intent or class I can call to do that? Or do I have to develop such mechanisim from scratch? I have no idea where to start with</p>
  
  <p>Heeeelp!
  Thank you</p>