(A Peugeot pop-up calendar control suitable for Android platform, with appropriate Peugeot style, pop up date and time selector. The comments in the Java code are very rich. They must be helpful for novices to learn how to use and develop Android, so they are posted for learning. Notes in some codes: add big and small months and convert them into a list for later judgment. For the convenience of finding dialog layout files, please select the date and time to judge whether the big and small months and leap years are or not. The data used to determine the day is used to specify the size of selector fonts according to screen density. If it is a number, it will be displayed as 02 style)