(Dialog dialog instance set of Android source code, code author: Xuan Yusong. This code set demonstrates how to implement several commonly used information boxes on Android, including the information box with the OK cancel button, multiple button information box, Android list box, progress bar box, single item selection list box, multiple item selection list box, custom layout, and read progress box. Each dialog box has its own characteristics and uses. The author adds comments in the code, which is intended for beginners who want to learn about Android mobile development, It is a valuable textbook.)