With the release of Adobe Flash Builder 4.5, and more lately 4.5.1, mobile development with Flex and AIR has taken off at a neck-breaking speed across all major platforms - Android, iOs, and Blackberry. While there are plenty of resources on the web that cover "hello world" type applications, no article covers basic concepts of AIR + Android in depth. In order to develop a meaningful Android application that uses multi-touch, accelerometer, camera, geolocation, microphone, and video, you need to first understand these concepts. This book covers all those topics in addition to advanced topics like hardware acceleration.
I was delighted by the author's simple style of explaining these concepts. It makes this book a pleasure to read and easy to follow step-by-step. I highly recommend this book to anyone doing AIR development on Android. This book and videos on the Adobe developer site for connecting to server side would (Java/Spring/Hibernate) would be a great resource to keep handy.