本程序通过重写android的几个状态函数，来验证oninstancesave与onrestore函数的用法，从而为一个活动销毁时需要保存的数据提供一个可以参考的方法-Android by rewriting the program several state function, to verify oninstancesave and onrestore function of usage, so as to destroy an activity needs to be saved when