When building complex applications, you'll often want to reuse the same group of views in various places of the application. One way to solve this problem is by creating a view that encapsulates the logic and layout of a group of views so you can reuse them without duplicating code in various places of the project. In this tutorial, you'll learn how to use compound views to create custom views that are easily reusable.
Source files for the Tuts+ tutorial: Creating Compound Views on Android
Read this tutorial on Tuts+