Android UI Option in Android manifest-XML on Eclipse:

Android UI Option in Android manifest-XML on Eclipse: 

User can now select multiple UI designs for there applications. 

Source: http://developer.android.com/design/get-started/ui-overview.html

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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.