从机器人执行shell命令 [英] execute shell command from android

问题描述

我试图从应用程序模拟器终端执行这个命令（你可以找到它在谷歌播放）在此应用程序我写苏和preSS <大骨节病>输入，这样写：

I'm trying to execute this command from the application emulator terminal (you can find it in google play) in this app i write su and press enter, so write:

screenrecord --time限制10 /sdcard/MyVideo.mp4

和preSS再次<大骨节病>输入和使用A​​ndroid的奇巧的新功能开始屏幕的记录。

and press again enter and start the recording of the screen using the new function of android kitkat.

所以，我尝试使用这种从Java执行相同的code：

so, i try to execute the same code from java using this:

Process su = Runtime.getRuntime().exec("su");
Process execute = Runtime.getRuntime().exec("screenrecord --time-limit 10 /sdcard/MyVideo.mp4");

但是，不要工作，因为没有创建的文件。很显然，我是一个植根设备安装Android的奇巧上运行。问题出在哪里？我该如何解决？因为从终端仿真作品和在Java中不？

But don't work because the file is not created. obviously i'm running on a rooted device with android kitkat installed. where is the problem? how can i solve? because from terminal emulator works and in Java not?

推荐答案

您应该抓住苏进程刚刚推出的标准输入并记下命令在那里，否则您当前 UID 。

You should grab the standard input of the su process just launched and write down the command there, otherwise you are running the commands with the current UID.

尝试是这样的：

try{
    Process su = Runtime.getRuntime().exec("su");
    DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());

    outputStream.writeBytes("screenrecord --time-limit 10 /sdcard/MyVideo.mp4\n");
    outputStream.flush();

    outputStream.writeBytes("exit\n");
    outputStream.flush();
    su.waitFor();
}catch(IOException e){
    throw new Exception(e);
}catch(InterruptedException e){
    throw new Exception(e);
}

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