title: How to create a custom lock screen widget (I just want to display a button)
body: <p>I need to allow users to quickly capture an image using my app when the device is locked.  I figure the quickest way for a user to do this is via a button/widget on the lock screen - although I'm not sure how to build this.</p>
  
  <p>Most references I've found have related to music playback and use of the RemoteControlClient (which may be just Android 4.4?).  At it's most basic I'd just like one button that said "capture".  Any help on how to do this?</p>