使用Runtime.getRuntime().exec从定义的目录中执行文件 [英] execute file from defined directory with Runtime.getRuntime().exec

问题描述

我只想从特定文件夹执行文件.就我而言/data/data/my-package/files/. 所以我尝试了:

I just want to execute my file from a specific folder. in my case /data/data/my-package/files/. So i tried :

 Process process2=Runtime.getRuntime().exec("cd /data/data/my-package/files/");
 process2.waitFor();
 process2=Runtime.getRuntime().exec("./myfile");

它不起作用.谁能告诉我正确的做法.谢谢

It doesn't work. could anyone tell me please the right way to do that . Thanks

推荐答案

应该可以使用

It should be possible to call the executable with a specific working directory using Runtime.exec(String command, String[] envp, File dir)

如下:

Process process2=Runtime.getRuntime().exec("/data/data/my-package/files/myfile",
        null, new File("/data/data/my-package/files"));

也许没有到myfile

Process process2=Runtime.getRuntime().exec("myfile",
        null, new File("/data/data/my-package/files"));

Context#getFilesDir()而不是硬编码路径也应该起作用，并且比您自己指定路径更安全/更干净，因为不能保证/data/data/.. 始终是所有设备的正确路径.

Context#getFilesDir() instead of hardcoding the path should work too and is safer / cleaner than specifying the path yourself since it is not guaranteed that /data/data/.. is always the correct path for all devices.

Process process2=Runtime.getRuntime().exec("myfile",
        null, getFilesDir()));

cd somewhere的问题在于，已为其他Process更改了目录，因此在新Process中第二次调用exec时看不到更改.

The problem with cd somewhere is that the directory is changed for a different Process so the second call to exec in a new Process does not see the change.

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