Android获取 公网ip

一、通过某些企业提供的服务

• 通过 http://ip.chinaz.com/getip.aspx
• 通过 http://pv.sohu.com/cityjson

浏览器 get请求 效果图：

git地址：
https://github.com/xiaxveliang/Android_HttpUrlConnect_Demo

二、Head请求 某个网络地址

查看其Response Header数据

/**
 * create by xiaxl.
 * 获取:
 * 用户公网ip
 * cdn ip
 * via
 */
public class CdnUtil {


    private static final String TAG = "CdnUtil";


    /**
     * @param url
     * @param callBack
     */
    public static void getCdnInfo(final String url, final OnCdnInfoCallBack callBack) {
        Task.call(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                // UI_Thread

                return null;
            }
        }, Task.UI_THREAD_EXECUTOR).onSuccess(new Continuation<Void, CdnInfoBean>() {
            @Override
            public CdnInfoBean then(Task<Void> task) throws Exception {
                // Background_Thread
                return getResponseCDN_Sync(url);
            }
        }, Task.BACKGROUND_EXECUTOR).continueWith(new Continuation<CdnInfoBean, Void>() {
            @Override
            public Void then(Task<CdnInfoBean> task) throws Exception {
                // UI_Thread
                if (task != null && task.getResult() != null) {
                    CdnInfoBean cdnBean = task.getResult();
                    if (callBack != null) {
                        callBack.onSuccess(cdnBean);
                    }
                } else {
                    if (callBack != null) {
                        callBack.onError();
                    }
                }
                return null;
            }
        }, Task.UI_THREAD_EXECUTOR);
    }


    /**
     * 返回相应的cdn服务器ip
     * 

     * 同步方法(需开线程执行)
     * add by xiaxl
     *
     * @return
     */
    private static CdnInfoBean getResponseCDN_Sync(String url) {
        PalLog.d(TAG, "---getResponseCDN_Sync---");
        //
        CdnInfoBean cdnBean = new CdnInfoBean();
        //
        if (TextUtils.isEmpty(url)) {
            return cdnBean;
        }
        try {
            URL obj = new URL(url);
            URLConnection conn = obj.openConnection();
            Map<String, List<String>> map = conn.getHeaderFields();
            for (Map.Entry<String, List<String>> entry : map.entrySet()) {
                if (entry.getKey() != null) {
                    if (entry.getKey().equals(CdnInfoBean.CDN_IP)) {
                        cdnBean.cdnIp = entry.getValue().toString();
                    } else if (entry.getKey().equals(CdnInfoBean.CDN_USER_IP)) {
                        cdnBean.cdnUserIp = entry.getValue().toString();
                    } else if (entry.getKey().equals(CdnInfoBean.X_VIA)) {
                        cdnBean.xVia = entry.getValue().toString();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        PalLog.d(TAG, "cdnBean: " + cdnBean);
        return cdnBean;
    }


    /**
     * cdn 信息
     */
    public static class CdnInfoBean {

        public static final String CDN_IP = "cdn-ip";
        public static final String CDN_USER_IP = "cdn-user-ip";
        public static final String X_VIA = "X-Via";

        /**
         *
         */
        public String cdnIp;
        public String cdnUserIp;
        public String xVia;


        @Override
        public String toString() {
            StringBuffer sb = new StringBuffer();
            sb.append("cdn-ip: ");
            sb.append(cdnIp);
            sb.append(" cdn-user-ip: ");
            sb.append(cdnUserIp);
            sb.append(" xVia: ");
            sb.append(xVia);
            return sb.toString();
        }
    }


    public interface OnCdnInfoCallBack {
        void onSuccess(CdnInfoBean info);

        void onError();
    }


}

三、是否还有其他方式？ 请留言谢谢

不知是否还有其他获取”运营商公网Ip“的方式，如果您知道，请您指导，谢谢