Android Design Guidelines
Number of pages: 44
Designing an Android app needs to be a constant collaboration between design and development. The look and feel of the app should be discussed by both parties from the beginning. This document is written from the point of view of a visual designer.
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by Mark L. Murphy - CommonsWare
This is the single most comprehensive and current book on Android programming, from getting your first project started to advanced topics like integrating maps, encrypted databases, and integrating with other applications.
by Nicolas Gramlich - anddev.org
This book on Android programming was written for developers who have worked with Java before and want to start developing for the Android Platform. The author made this as much 'hands on' as possible, placing example codes everywhere it fit.
The book prepares you to take the exam for the Associate Android Developer Certification. You learn basic Android programming concepts and build a variety of apps, starting with Hello World and working your way up to apps that use loaders.
by Ian F. Darwin - O'Reilly Media
If you're ready to jump in and build a working Android app, this book has all of the practical recipes you need to get the job done. You'll work with the user interface, multitouch, location-aware apps, web services, device features, etc.