(This is a book that introduces any knowledge related to Android. The book is divided into three parts, from the simple to the deep. From the basic knowledge of Android, it talks about some effective examples of core programming, and finally comments on some topics of high-end applications. When introducing Android programming, each topic uses independent examples to demonstrate, and these examples can also be used as reference for novice programmers or senior developers who want to make a great effort in Android programming. This book is suitable for Android developers and technology enthusiasts. If you can read this book from beginning to end, you will have a deep understanding of Android, and then you can show your skills in Android development.)