Welcome to the Book
Thanks for your interest in developing applications for Android! Increasingly, people will access Internet-based services using so-called "nontraditional" means, such as mobile devices. The more we do in that space now, the more that people will help invest in that space to make it easier to build more powerful mobile applications in the future. Android is new—Androidpowered devices first appeared on the scene in late 2008—but it likely will rapidly grow in importance due to the size and scope of the Open Handset Alliance. And, most of all, thanks for your interest in this book! I sincerely hope you find it useful and at least occasionally entertaining.
Prerequisites
If you are interested in programming for Android, you will need at least a basic understanding of how to program in Java. Android programming is done using Java syntax, plus a class library that resembles a subset of the Java SE library (plus Android-specific extensions). If you have not programmed in Java before, you probably should learn how that works before attempting to dive into programming for Android. The book does not cover in any detail how to download or install the Android development tools, either the Eclipse IDE flavor or the stand-alone flavor. The Android web site covers this quite nicely. The material in the book should be relevant whether or not you use the IDE. You should download, install, and test the Android development tools from the Android web site before trying any of the examples presented in this book.
Some chapters may reference material in previous chapters. Also, not every sample shown has the complete source code in the book, lest this book get too large. If you wish to compile the samples, download the source code from the Apress web site
apress.com.
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