Android Database:
Android's Java interface to its relational database, SQLite.
It supports an SQL implementation rich enough for anything you're likely to need in a mobile application, including a cursor facility.
ContentProvider:
An interface used between applications.
The server application that hosts the data manages it through basic create, read, update, and delete (CRUD) operations.
The client application uses a similar API, but the Android framework transmits the client's requests to the server.
