At the website for this book, you’ll find the following:
The full source code for all the sample programs used in this book, along with resources such as sounds and images
An errata page, listing any mistakes in the current edition (let’s hope that will be empty!)
A discussion forum where you can communicate directly with the author and other Android developers (let’s hope that will be full!)
You’re free to use the source code in your own applications as you see fit. Note: If you’re reading the ebook, you can also click the little rectangle before the code listings to download that source file directly.