The layout file of Android is the weakness of Android program. At present, there is no technology that cannot be decompiled. I hope Google can improve as soon as possible. In addition, when you package and sign apk, the java code will be confused, so that it is difficult for others to understand the java file after your program is decompiled. If you have a confused student code, it will become a meaningless class name like abc; Baidu confuses the Android code and you will know!