使用Runtime.getRuntime().exec("ip neigh")；请求被拒绝

代码是在网上看到的，运行在andoid10的手机上，主要代码如下：

public String getShellResult() {
        String result = "";
        Runtime mRuntime = Runtime.getRuntime();
        try {
            Process mProcess = mRuntime.exec("ip neigh");
            InputStream is = mProcess.getErrorStream();
            flag=1;
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader mReader = new BufferedReader(isr);
            String string;
            while ((string = mReader.readLine()) != null) {
                result = result + string + "\n"; }
        } catch (IOException e) {
            e.printStackTrace();
            Log.e("IPerror", "error");
        }
        return result;
 }
}