语法在Android应用程序shell命令 [英] Syntax for shell command in Android app

问题描述

我试图运行

String command = "su -c 'busybox ls /data'";
p = Runtime.getRuntime().exec(command);

在我的应用程序，但它似乎是语法是某种错误的。我没有问题，运行它从终端仿真器应用程序在手机上，虽然如此，我只是不明白为什么它不工作从我的应用程序调用的时候。

in my app, but it seems like the syntax is somehow wrong. I have no problem running it from the terminal emulator app on the phone, though, so I just can't understand why it is not working when called from within my app.

任何帮助表示深深的AP preciated！

Any help is deeply appreciated!

推荐答案

解决方案找到了！由于该链接通过它身上的此处。见code以下：超级用户shell命令正常工作，你首先需要创建一个超级用户的外壳，并将其分配给一个过程，然后写入和读取它的输入和输出流分别为

SOLUTION FOUND! Thanks to the link suggested by onit here. See the code below: for superuser shell commands to work properly, you first need to create a superuser shell and assign it to a process, then write and read on it's input and output streams respectively.

Process p = Runtime.getRuntime().exec(new String[]{"su", "-c", "system/bin/sh"});
DataOutputStream stdin = new DataOutputStream(p.getOutputStream());
//from here all commands are executed with su permissions
stdin.writeBytes("ls /data\n"); // \n executes the command
InputStream stdout = p.getInputStream();
byte[] buffer = new byte[BUFF_LEN];
int read;
String out = new String();
//read method will wait forever if there is nothing in the stream
//so we need to read it in another way than while((read=stdout.read(buffer))>0)
while(true){
    read = stdout.read(buffer);
    out += new String(buffer, 0, read);
    if(read<BUFF_LEN){
        //we have read everything
        break;
    }
}
//do something with the output

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