android如何使用onTerminate()方法? [英] How to use onTerminate() method , android?

问题描述

我正在尝试使用 SharedPreferences 保存一些变量.在我的 onCreate()方法中，我使用 SharedPreferences 初始化变量，并且我希望在应用程序结束时存储此变量.我将此代码放在 onTerminate()方法上，但从未存储过变量.我认为从未调用过 onTerminate()方法，因为我还看到对此方法的评论，说//不保证被调用.那么，如何在停止应用程序之前保存变量的状态?我知道如何，只是不知道将代码放置在何处.

I am trying to save some variables using SharedPreferences. In my onCreate() method I initialize my variables using SharedPreferences , and I want when the application ends to store this variables. I am putting this code on the onTerminate() method but the variables are never stored. I think that the onTerminate() method is never called , as i also see a comment on this method saying // not guaranteed to be called . So how can i save the state of my variable just before I stop the application? I know how , I just don't know where to place my code.

推荐答案

实际上，为了安全起见，应将内容保存在onPause()中，因为(至少在3.0之前)您的进程可以在调用后被OS杀死onPause().这意味着onStop()和onDestroy()可能会被调用，也可能不会被调用.

Actually, to be safe, you should save things in onPause() because (at least pre-3.0) your process can be killed by the OS after it calls onPause(). This implies that onStop() and onDestroy() may or may not be called.

在任何情况下，都不能保证onDestroy()会被调用.如果操作系统决定终止您的进程，则无需在任何活动上调用onDestroy().

In any case, there is no guarantee that onDestroy() will ever be called. If the OS decides to kill your process it won't bother calling onDestroy() on any activities.

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