(A good android e-book. This e-book is all in English, with specific explanations, clear process, pictures and source code. It is divided into four parts: Part I Help Programmers? Some Java or iOS experience gained a quick start with Android SDK and Android programming foundation.? The second part explores the Android framework in depth, focusing on the user interface and graphical hierarchy framework, concurrency and database. This is a solid foundation for understanding the most important part of Android using the program's work.? The third part is about the framework and mode of functional code, accelerating the development of data using web applications and Android 4 user interface agreements and apis.? The fourth part provides effective coverage of Android's multimedia, search, location, sensor and account api, plus native development packages, enabling developers to add advanced functions. This latest version of Android programming knowledge and the focus of developers are essential to successful Android development projects.)