(Android development tutorial, the basic version, is compiled from a series of tutorials. Experts should not read the basic knowledge. The primary object of this book is the people who are about to enter the Android programming team or who have entered but are still confused. In the field of smart phones, the Android system is impeccable, which is destined to have a broad prospect for the development of Android mobile phone system. In China, a large number of program enthusiasts have been inspired to return to the application development of Android. This document includes the following annexes:)