how to decide between direct database access and content provider?

Question

I am writing an application that consists of business logic and UI parts. There is quite big amount of data to be stored and accessed/modified by both BL and UI. In most of

Answer 1

IMO: Single APK == direct access through a persistence layer. Multple APKs (either your own or wanting to provide access to the data to others' apps) == Content Provider by simple necessity.