Created a user named "student number + name" information management program, the program is used for input, save, display and choose delete list, click on the request in the previous step interface "save user information" button, can jump to show the following user information list interface, and accurate access to step on the interface of the user input values, because this case need to use a SQLite database to store data, so it is necessary to write in the MainActivity corresponding logic code, [note in this step you created earlier to achieve database connection Java source files,] you need to show the user information in a ShowUserInfoActivity logic code, refresh request list delete can be implemented and the function of information