显示Shell脚本的进程

Question

我有以下方法在我的 java 应用程序中运行 shell 命令，并且我希望运行一些脚本，例如修复用户手机上所有应用程序权限的脚本。我可以使用此命令 execCommand("/system/xbin/fix_perm"); 毫无问题地运行脚本但问题是我只想打印出正在执行的操作，就像终端模拟器一样，我如何获取输出流并将其打印在屏幕上？感谢您的帮助

public Boolean execCommand(String command) 
{
    try {
        Runtime rt = Runtime.getRuntime();
        Process process = rt.exec("su");
        DataOutputStream os = new DataOutputStream(process.getOutputStream()); 
        os.writeBytes(command + "\n");
        os.flush();
        os.writeBytes("exit\n");
        os.flush();
        process.waitFor();
    } catch (IOException e) {
        return false;
    } catch (InterruptedException e) {
        return false;
    }
    return true;
}

Answer 1

我希望您了解允许用户以 su 形式运行任意命令可能带来的极端后果，并指出可能的解决方案。

public Boolean execCommand(String command) 
{
    try {
        Runtime rt = Runtime.getRuntime();
        Process process = rt.exec("su");

        // capture stdout
        BufferedReader stdout = new BufferedReader(
            new InputStreamReader(process.getInputStream()));
        // capture stderr
        BufferedReader stderr = new BufferedReader(
            new InputStreamReader(process.getErrorStream()));

        DataOutputStream os = new DataOutputStream(process.getOutputStream()); 
        os.writeBytes(command + "\n");
        os.flush();

        String line = null;
        StringBuilder cmdOut = new StringBuilder();
        while ((line = stdout.readLine()) != null) {
            cmdOut.append(line);
        }
        stdout.close();
        while ((line = stderr.readLine()) != null) {
            cmdOut.append("[ERROR] ").append(line);
        }
        stderr.close();

        // Show simple dialog
        Toast.makeText(getApplicationContext(), cmdOut.toString(), Toast.LENGTH_LONG).show();

        os.writeBytes("exit\n");
        os.flush();

        // consider dropping this, see http://kylecartmell.com/?p=9
        process.waitFor(); 
    } catch (IOException e) {
        return false;
    } catch (InterruptedException e) {
        return false;
    }
    return true;
}