https://www.cnblogs.com/ITtangtang/p/3920916.html
SharedPreferences的基本使用-----存,删,改,查:https://www.cnblogs.com/qianzf/p/7582400.html
Android Sharedpreferences清空的正确方法:https://blog.csdn.net/a_man_coder/article/details/78085295
https://www.cnblogs.com/ITtangtang/p/3920916.html
SharedPreferences的基本使用-----存,删,改,查:https://www.cnblogs.com/qianzf/p/7582400.html
Android Sharedpreferences清空的正确方法:https://blog.csdn.net/a_man_coder/article/details/78085295