如何在 Android 设备的根目录中创建/写入文件? [英] How to create/write file in the root of the Android device?

问题描述

我发现你可以使用这样的东西来创建一个文件:

I found out that you can use something like this to create a file:

FileOutputStream  fs = openFileOutput("/test.in", MODE_WORLD_WRITEABLE);
String s = "[Head]
";
s += "Type=2";
byte[] buffer = s.getBytes();
fs.write(buffer);
fs.close();

当运行上面的代码时，我得到一个 IllegalArgumentException 说明:

When running the above code I get an IllegalArgumentException stating:

java.lang.IllegalArgumentException:文件/test.in 包含路径分隔符

java.lang.IllegalArgumentException: File /test.in contains a path separator

我猜/"不受欢迎.我想要/"，因为我需要将文件写入设备的根目录，如 API 中所述:

and I'm guessing the "/" is not appreciated. I wanted the "/" since I need to write the file to the root directory of the device, as stated in the API in trying to follow:

请求是一个文本文件(UNICODE)，其中包含文件扩展名.in".这应用程序读取并解析 .in文件放在根目录中时移动设备上的目录.

A request is a textfile (UNICODE) with the file extension ".in". The application reads and parses the .in file when it's placed in root directory on the mobile device.

问题是:如何在根目录中放置文件?我一直在四处寻找答案，但还没有找到.

Question is: how do I place a file in the root-directory? I have been looking around for an answer, but haven't found one yet.

推荐答案

Context.openFileOutput 旨在用于创建应用程序私有的文件.它们位于您应用的私有数据目录中.您提供名称，而不是路径:名称要打开的文件的名称；不能包含路径分隔符".

Context.openFileOutput is meant to be used for creating files private to your application. they go in your app's private data directory. you supply a name, not a path: "name The name of the file to open; can not contain path separators".

http://developer.android.com/reference/android/content/Context.html#openFileOutput(java.lang.String, int)

至于你的问题，除非你是 root，否则你不能写信给/:

as for your question, you can't write to / unless you're root:

my-linux-box$ adb shell ls -l -d/drwxr-xr-x 根 根 2010-01-16 07:42$

my-linux-box$ adb shell ls -l -d / drwxr-xr-x root root 2010-01-16 07:42 $

我不知道您希望您写入根目录的 API 是什么，但我猜它不是 Android API 并且您正在阅读错误的文档;-)

i don't know what your API is that expects you to write to the root directory, but i'm guessing it's not an Android API and you're reading the wrong documentation ;-)

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