问题描述

我知道，这里有很多关于保存/检索数据的问题.我自己在 find 查找问题，并且真的认为我可以设法找到我的答案而无需提出问题"，但我开始想知道一些我在这里没有看到答案的东西.

I know, there are plenty of questions in regards to saving/retrieving data on here. I was doing find looking things up on my own and really thought I could manage to find my answers without having to "ask a question", but I began to wonder something that I haven't seen an answer for on here.

我的情况:

当然，我正在制作一个应用程序.关闭应用程序后，我想保存一个简单的数字数组(0 或 1)或布尔值.在启动应用程序时，我想搜索该数组(如果存在)并检索它以在应用程序中使用.

Naturally, I'm making an app. Upon closing the app, I want to save a simple array of numbers (0 or 1) or boolean values as it were. Upon starting the app, I want to search for that array, if it exists, and retrieve it for use within the app.

我开始将我的代码放入将使用数组的活动中.但是，我开始怀疑是否必须将覆盖的 onStop() 函数复制/粘贴到我的所有活动中?或者我是否在主要活动中执行此操作并以某种方式链接其他活动.

I began placing my code into the activity in which the array would be used. But, I started wondering if I would have to copy/paste the overridden onStop() function into all of my activities? Or do I do it in the main activity and somehow link the other activities.

基本上，无论应用程序关闭时应用程序当前处于什么状态/活动，我都希望能够保存 int/bool 数组并在应用程序启动时将其打开.

Basically, no matter what state/activity the app is currently on when the app is closed, I want to be able to save the array of int/bool and open it back up when the app is started.

也许我不知道如何搜索我想要的东西，所以解释它是正确的做法.

Maybe I didn't know how to search for what I wanted, so explaining it felt like the right thing to do.

我不介意进行更多搜索，但如果有人至少能指出我正确的方向，我将非常感激.

I don't mind doing more searching, but if someone would point me in the right direction at the very least, I'd be extremely grateful.

如果有比我所描述的更好的方法来做我想做的事(例如，使用不同的状态而不是 onStop())，请随意抛出想法.这是我第一次真正不得不处理活动的生命周期，即使在浏览了 android 开发教程之后我也有点困惑.我真的认为他们在大多数情况下做得不好.

If there's a better way to do what I want than what I described (i.e. using a different state instead of onStop(), for instance), please feel free to throw out ideas. This is my first time actually having to deal with the activities' lifecycles and I'm a bit confused even after looking through the android development tutorials. I really think they're poorly done in most cases.

推荐答案

当您的应用程序需要保存一些持久性数据时，您应该始终在 onPause() 方法中进行，而不是在 onStop().因为如果 android 操作系统杀死了你的进程，那么永远不会调用 onStop() 和 onDestroy() 方法.同样在 onResume() 方法中检索数据.