Android Application Development For Dummies
Android is a mobile operating system based on a modified version of the Linux kernel and other open source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance, with the main contributor and commercial marketer being Google.
If you want to learn Android Application Development you can learn it easily by downloading Android Cookbook. Problems and Solutions for Android Developers.
Android Application Development for Dummies