Regarding the study of java, I highly recommend the Art of java Programming and java Thinking. The Art of java Programming seems to have more than 700 pages, so I can't remember it clearly. This book has a detailed description of many details, so there is no need to say more about java. This is a must-read book.
Regarding android programming learning, I personally recommend Google android in Simple Language and Detailed Explanation of android Core Technology and Examples. These two books are really suitable for beginners of Android.
If you want to learn programming well, it is also important to read more books besides practicing code. There are many programming books in my school library. I don't know how many I have read. Every time I read a book, I gain a lot. It is really important to read more books.
Second, it is also important to be good at finding information on the Internet. There are all kinds of original codes, videos and experiences on the Internet. There are many practical applications that are not available in books.
Third, programming needs patience and avoids exaggeration. As the saying goes, persistence is victory. Especially programming, don't give up when you encounter problems. When your level reaches a certain level, you will find that the previous problems are nothing.
Fourthly, takenism, I think, is more important in the study of programming. Instead of copying other people's source code, we should understand it first and then imitate it, and think about whether there is any room for improvement while understanding it.
Fifth, before learning android, it is necessary to have a solid java foundation. Don't learn Android with half a bucket of water, or it will be more difficult to learn Android.
Sixth, if you are not very interested in programming and simply think that you can program well, you can say a few technical terms and pretend to be a great god in front of Xiaobai. I suggest not wasting time. As the saying goes, the speaker is not wise, the wise man doesn't speak, and then he hides his light and bides his time. Many real masters keep a low profile (I said so, so I'm not a master. Occasionally vanity skyrockets, I will pretend to be B, and I will also go to the programming forum to learn more.