Are there any good database abstraction layers/object relational mappers/ActiveRecord implementations/whatever they are called for Android? I\'m aware that db4o is officiall
Have a look at Androrm. It is open source and well documented (see here). If you ever worked with django, you will notice, that the syntax is very similar.
Androrm also supports abstraction classes for the most common field types, plus relational fields. This way it enables you to query for your data in an very easy manner with only very little effort on your side.