允许在Android中读取/写入根文件夹的权限 [英] Permission for reading/writing to the root folder in Android

问题描述

我是否可以/必须在我的应用中声明任何权限，
如果我希望该应用程序能够扫描整个"/"文件夹
(例如说以递归方式搜索所有.txt文件)?

Are there any permissions I can/must declare in my app,
if I want the app to be able to scan the whole "/" folder
(say to search for all .txt files e.g. recursively)?

到目前为止(调用File.listFiles时)我只得到null
不管我尝试什么权限.我想我缺少了一些东西.

I am getting just null so far (when calling File.listFiles)
no matter what permissions I try. I guess I am missing something.

推荐答案

除非您root设备，否则无法对非root用户设备的根目录进行任何操作，因为第三方应用程序将正常运行用户，并且没有root权限.

Unless you root your device, it is impossible to do any operations on the root directory on a non-rooted device because a third party app will run as a normal user and won't have the root permissions.

但是，根据 https://developer.android.com/reference/android/Manifest.permission ，android.permission.FACTORY_TEST可以授予您root权限.

However, according to https://developer.android.com/reference/android/Manifest.permission, android.permission.FACTORY_TEST can give you the root permission.

在API级别1中添加了FACTORY_TEST

FACTORY_TEST added in API level 1

公共静态最终字符串FACTORY_TEST

public static final String FACTORY_TEST

作为制造商测试应用程序运行，作为 超级用户.仅在设备在制造商中运行时可用 测试模式.

Run as a manufacturer test application, running as the root user. Only available when the device is running in manufacturer test mode.

不供第三方应用程序使用.

Not for use by third-party applications.

常量值:"android.permission.FACTORY_TEST"

Constant Value: "android.permission.FACTORY_TEST"

但是请注意，这只能由制造商通过修改固件来使用，而不适用于任何第三方库或应用程序.

But note this can only be used by manufacturers by modifying the firmware, and this is not for any third part libraries or applications.

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