Google's Android is shaking up the mobile market in a big way. With Android, you can write programs that run on any compatible cell phone or tablet in the world. It's a mobile platform you can't afford not to learn, and this book gets you started. Hello, Android has been updated to Android 2.3.3, with revised code throughout to reflect this updated version. That means that the book is now up-to-date for tablets such as the Kindle Fire. All examples were tested for forwards and backwards compatibility on a variety of devices and versions of Android from 1.5 to 4.0. (Note: the Kindle Fire does not support home screen widgets or wallpaper, so those samples couldn't be tested on the Fire.)
Android is an operating system for mobile phones and tablets. It's inside millions of cell phones and other devices, including the hugely popular Amazon Kindle Fire, making Android the foremost platform for mobile application developers. That could be your own program running on all those devices.