(The Practical Use and Development of Android is a reference book for the use and development of Android that closely combines practice with theory. In the practice part, a complete large case (microblog client with perfect functions) is used throughout. The whole development process of the case is demonstrated and explained in an iterative way, aiming to help readers quickly clarify the whole process and implementation details of Android use and development. Together, the theoretical knowledge involved in the development process is analyzed and explained in detail. The theory part is the improvement of the practice part. It deeply expounds the high-level knowledge and common skills required for the use and development of Android. After mastering this part, readers can further improve their theoretical and technical skills after gaining practical use and development experience. This book is the first book based on Android 4.0 in China, written by senior experts in person, recommended by professional communities together, and a comprehensive case throughout the book, integrating theory into practice, providing excellent guidance for practical advancement.)