删除文件后Android共享首选项仍然可见 [英] Android Shared Preference Still visible after Deleting File

问题描述

我正在尝试使用共享首选项的应用程序.当我使用 Android 监视器从 data/data/com.your.package.name/shared_prefs/mySharedPref.xml 手动删除首选项文件时，该应用程序仍然能够读取首选项值.

I am trying an application where I am using Shared Preference. When I delete the preference file from data/data/com.your.package.name/shared_prefs/mySharedPref.xml manually using Android monitor, still the app is able to read the preference values.

我假设某些值是如何保留在手机的主存储器中的.我是否正确&清除共享偏好完全不留痕迹的可行解决方案是什么.但有一件事我只想在文件被擦除时清除首选项.为此，我需要检查文件是否存在，还有其他方法而不是检查 File 类吗?

I am assuming that some how the value is retained in main memory of the phone. Am I correct & what is the viable solution to clear shared preferences totally leaving no traces. But one thing I want to clear preference only if the file is wiped. For this I need to check presence of file, Any other approach rather than checking with File class ?

推荐答案

要删除特定值:SharedPreferences.Editor.remove() 后跟一个 commit()

To remove specific values: SharedPreferences.Editor.remove() followed by a commit()

将它们全部删除 SharedPreferences.Editor.clear() 后跟 commit()

To remove them all SharedPreferences.Editor.clear() followed by a commit()

您使用 remove() 删除特定首选项，使用 clear() 删除所有首选项.

在SharedPreferences.Editor<上查看官方文档/a>.

Checkout official documentation on SharedPreferences.Editor.

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