getPurchases() NullPointerException initializing mService
问题 Edit: Please see my answer below for my solution. I'm receiving a NullPointerException error when trying to check owned items using getPurchases() and I'm not sure why as I've followed the documentation. I'm finding that the documentation can be misleading at times, so here I am. I've set up In-app billing such that it initializes okay and I get a success message. After it is initialized, I want to check if the user has previously purchased item(s) and display a button based on the result.