Sorry, there are so many examples out there and finding the one that's right for you can take a bit of time. Personally, i learned this stuff via Android Essentials, which is available on techtopia here.
I can't renounce my name. It's on all my stationery! And hinted in this tiny ad:
RavenDB is an Open Source NoSQL Database that’s fully transactional (ACID) across your database