title: Android Custom View with time-based updates
body: <p>I'm aware there's a digital clock widget that's available, but for learning purposes I decided to create a custom widget by extending the View class. I'm successfully drawing the time unto the screen, but I don't know the proper way of getting the view to update the time every second.</p>
  
  <p>I need something that will tell the view to redraw itself every second to update the time. What's the right way to do that?</p>