/**
     * Is rooted boolean.
     *
     * @return the boolean
     */
    public static boolean isRooted() {
        // nexus 5x "/su/bin/"
        String[] paths = {"/system/xbin/", "/system/bin/", "/system/sbin/", "/sbin/", "/vendor/bin/", "/su/bin/"};
        try {
            for (int i = 0; i < paths.length; i++) {
                String path = paths[i] + "su";
                if (new File(path).exists()) {
                    String execResult = exec(new String[]{"ls", "-l", path});
                    Log.d("cyb", "isRooted=" + execResult);
                    if (TextUtils.isEmpty(execResult) || execResult.indexOf("root") == execResult.lastIndexOf("root")) {
                        return false;
                    }
                    return true;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    private static String exec(String[] exec) {
        String ret = "";
        ProcessBuilder processBuilder = new ProcessBuilder(exec);
        try {
            Process process = processBuilder.start();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                ret += line;
            }
            process.getInputStream().close();
            process.destroy();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ret;
    }