He begins by discussing Android market fragmentation, and then explains how to set the minimum SDK level and check the current device's screen size programmatically. Next, he covers how to work with multiple screens, explaining how to create alternative resource directories that the app framework can recognize and use to ensure that particular elements—such as string values, dimensions, and graphics—appear the way you want them to on different devices. To wrap up, David shows how to work with fragments to create dynamic UIs.

Topics include:
* Supporting different platform versions
* Setting minimum and target platforms
* Working with multiple screens
* Creating alternative resource directories, XML layout files, and bitmap resources
* Creating dynamic UIs with fragments
* Creating a project with fragments
* Controlling a fragment with Java code