I'm one of the authors. We just got done writing the back cover material that summarizes the changes for the 2nd edition. I have pasted-in the draft of the back cover material below:
Programming Android is now in an extensively revised second edition that gets you off to a faster start, focuses you on best practices in Android 4 APIs, and enables you to create an up-to-date user experience for both handsets and tablets.
This new edition is organized in four parts:
The first part provides programmers with some Java or iOS experience with the fastest approach to getting up to speed on the Android SDK and the introductory basics of Android programming.
The second part delves into the heart of the Android framework, focusing on user interface and graphics class hierarchies, concurrency, and databases, providing you a solid foundation for understanding how the most important parts of your Android applications work.
The third part provides you with code skeletons and patterns that speed your development of apps that use Web data and the new Android 4 user interface conventions, and the APIs that support those conventions.
The fourth part provides extensively updated practical coverage of Android’s multimedia, search, location, sensor, and account APIs, plus the Native Development Kit (NDK), enabling you to add advanced capabilities to your apps.
Programming Android is focused on developer priorities and knowledge that the authors have come to see as fundamental to good outcomes in Android development projects, now updated and refined.