SharedPreferences读取旧值 [英] SharedPreferences reads old values
问题描述
我使用SharedPreferences在应用程序的不同活动中写入和读取以后的值.它过去可以正常工作，但是最近好像没有被刺激.我的意思是，我写了一个值，但是其他活动仍然读取旧值.有时它会正确地工作.有什么主意吗?
I use SharedPreferences to write and later read values within different activities in my application. It used to work ok but lately it seems like it if wasn't sincronized. I mean, I write a value but then the other activity still reads the old value. Sometimes it works correcly. Any idea?
这是一个示例代码:
首先，从线程开始:
SharedPreferences prefs = getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("ComandToDo", value);
editor.commit();
... some code later:
alarmmanager.set(AlarmManager.RTC_WAKEUP, Miliseconds, sender);
在警报接收器中:
SharedPreferences prefs = contexto.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
int value = prefs.getInt("ComandToDo", -1);
问题来了，因为值"不是线程中写入的值.
And here comes the problem because "value" is not the value written in the thread.
推荐答案
-
SharedPreferences被记录为无法跨进程使用， http://developer.android.com/reference/android/content/SharedPreferences.html ，注意:当前此类不支持跨多个进程使用.稍后会添加."
SharedPreferences are documented not to work across processes, http://developer.android.com/reference/android/content/SharedPreferences.html, "Note: currently this class does not support use across multiple processes. This will be added later."
此答案建议将数据封装到内容提供程序中，并且该讨论还考虑了其他一些选项，包括共享的SQLite:https://stackoverflow.com/a/5265556/1665128
This answer recommends encapsulation of data into a content provider, and the discussion also considers some other options, including shared SQLite: https://stackoverflow.com/a/5265556/1665128
您在文件系统中也有普通的旧文件.我们在几个项目中使用了它们，并进行了锁定，没有任何问题.也可能是您的选择.
You also have plain old files in the file system. We used them in several projects, with locking, without any issues. May be an option for you as well.
这篇关于SharedPreferences读取旧值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
