(It is too difficult for self learners to find good books. This book is suitable for self learners to refer to, because I am a self scholar. The beginner's feelings have promoted me to recommend the book "Android Development Prestige Guide". For beginners, only one bean is needed. The book was published in September 2011. I bought the fourth printed version in March 2013, and the supporting CD of the 2013 version is available for download. At first, I thought that the book in 2011 was expired. I downloaded someone else's CD and found that it was really a prestigious Android textbook and manual without expiration. This is a book with a question answering website and blog. In order to learn Android, I bought more than ten books on this subject, and I thought they were well written, Two books are suitable for beginners: "Android SDK Program Design and Development Model" (Author: Chen Huian, Tsinghua University Press, January 2013) [I have uploaded the CD of the book to the, which is the best introduction book I think it has written] "Java Programming in Android System" (Author: Huaqing Yuanjian 3G College, Electronics Industry Press, October 2012))