轉載請註明出處：https://blog.csdn.net/u011038298/article/details/84619128 

    /**
     * 根據傳入的URL獲取一級域名
     *
     * @param url
     * @return
     */
    public static String getDomain(String url) {
        String domain = "";
        if (!TextUtils.isEmpty(url) && url.startsWith("http")) {
            try {
                String host = Uri.parse(url).getHost();
                if (!TextUtils.isEmpty(host) && host.contains(".")) {
                    domain = host.substring(host.indexOf("."), host.length());
                }
            } catch (Exception ex) {
            }
        }
        return domain;
    }


    /**
     * 根據傳入的URL判斷是否為xxx域名，預設不是
     *
     * @param url
     * @return
     */
    public static boolean isDomainXXX(String url) {
        return getDomain(url).equals(".xxx.com");
    }