Android app licensing - any current tutorials on this? : I am hoping somebody can point me in the right direction on this one.  I have been reading for a few days now on the developer site, various posts on stackoverflow, etc., and am really struggling to piece all of this together.  The Google documentation seems to have some gaps, or I'm simply missing the boat.  I have attempted to follow the Google docs on this a few times and keep running in to issues.

The most recent is that after going through the steps of downloading the market libraries via the SDK manager and then creating the new library module, I feel I'm missing the piece that will allow my app to see the modules.  Specifically, I am guessing there is a dependency that needs to be added to gradle, but I have found no such reference in any of the documentation.  If that's not the case, then I have no idea why my imports are not being found.  

Certainly this feature must work and work well, so I am hoping somebody can point me to a current/decent tutorial or functional sample application that I can view the code on.  I did review the sample application that is part of the sdk and as far as the code within the MainActivity goes, that is all fine and good.  My main issue is that I can't seem to get my application to be aware of these libraries to move forward with the implementation of the methods to perform the validation how I need.

Any direction would be greatly appreciated.

Thank you!