(On the basis of the previous version, with the theme of Android mobile phone user program development (Android SDK 2.1), through more than 160 models, it comprehensively and deeply combines multiple development fields such as mobile phones, networks and services, providing great help for readers to improve their program design skills. It can be found on the Internet, and then contribute to the Internet, to the people who need it
Google Android SDK Development Model Version 2. pdf)