Android 获取设备公网IP/私网IP地址

在应用调试过程中，对接的技术人员要求提供一下机顶盒的外网IP地址，于是打开了盒子上的设置，将IP地址发了过去，对面回复说这是私网IP，要公网IP才可以。

一般情况下，电脑的公网IP地址很好查：打开百度：

但是有些机顶盒上是没有浏览器的，所以就需要通过代码的层面来获取。

通过百度，先找到了如下的方法：

 /**
     * 获取IP地址
     * @return
     * @throws SocketException
     */
    public static String getLocalIPAddress() throws SocketException {
        for(Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();){
            NetworkInterface intf = en.nextElement();
            for(Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();){
                InetAddress inetAddress = enumIpAddr.nextElement();
                if(!inetAddress.isLoopbackAddress() && (inetAddress instanceof Inet4Address)){
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
        return "null";
    }

但是获取到的结果和机顶盒设置里的ip一致的，也就是说还是一个私网IP。

后经过查询，可通过如下方式获取公网IP：

 /**
     * 获取外网IP地址
     * @return
     */
    public static String GetNetIp(){
        String IP = "";
        try {
            String address = "http://ip.taobao.com/service/getIpInfo2.php?ip=myip";
            URL url = new URL(address);

            //URLConnection htpurl=url.openConnection();

            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setUseCaches(false);
            connection.setRequestMethod("GET");
            connection.setRequestProperty("user-agent",
                    "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.7 Safari/537.36"); //设置浏览器ua 保证不出现503

            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                InputStream in = connection.getInputStream();

                // 将流转化为字符串
                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(in));

                String tmpString = "";
                StringBuilder retJSON = new StringBuilder();
                while ((tmpString = reader.readLine()) != null) {
                    retJSON.append(tmpString + "\n");
                }

                JSONObject jsonObject = new JSONObject(retJSON.toString());
                String code = jsonObject.getString("code");

                if (code.equals("0")) {
                    JSONObject data = jsonObject.getJSONObject("data");
                    IP = data.getString("ip") + "(" + data.getString("country")
                            + data.getString("area") + "区"
                            + data.getString("region") + data.getString("city")
                            + data.getString("isp") + ")";

                    Log.e("提示", "您的IP地址是：" + IP);
                } else {
                    IP = "";
                    Log.e("提示", "IP接口异常，无法获取IP地址！");
                }
            } else {
                IP = "";
                Log.e("提示", "网络连接异常，无法获取IP地址！");
            }
        } catch (Exception e) {
            IP = "";
            Log.e("提示", "获取IP地址时出现异常，异常信息是：" + e.toString());
        }
        return IP;
    }

在代码中调用：

 try {
            String localIPAddress = IPutils.getLocalIPAddress();
            LogUtil.Log_i("IP地址："+localIPAddress);
        } catch (SocketException e) {
            e.printStackTrace();
        }

        new Thread(new Runnable() {
            @Override
            public void run() {
                String s = IPutils.GetNetIp();
                LogUtil.Log_i("外网IP："+s);
            }
        }).start();

获取到的结果：

外网IP：221.220.160.241(中国区北京北京联通)

这说明是成功的。需要注意的是，获取外网IP的方法必须要在子线程中执行。

附完整的工具类：

package com.zyp.river.utils;

import android.util.Log;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Enumeration;

/**
 * Created by ZhangYanPeng on 2018/9/19.
 */
public class IPutils {

    /**
     * 获取IP地址
     * @return
     * @throws SocketException
     */
    public static String getLocalIPAddress() throws SocketException {
        for(Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();){
            NetworkInterface intf = en.nextElement();
            for(Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();){
                InetAddress inetAddress = enumIpAddr.nextElement();
                if(!inetAddress.isLoopbackAddress() && (inetAddress instanceof Inet4Address)){
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
        return "null";
    }


    /**
     * 获取外网IP地址
     * @return
     */
    public static String GetNetIp(){
        String IP = "";
        try {
            String address = "http://ip.taobao.com/service/getIpInfo2.php?ip=myip";
            URL url = new URL(address);

            //URLConnection htpurl=url.openConnection();

            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setUseCaches(false);
            connection.setRequestMethod("GET");
            connection.setRequestProperty("user-agent",
                    "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.7 Safari/537.36"); //设置浏览器ua 保证不出现503

            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                InputStream in = connection.getInputStream();

                // 将流转化为字符串
                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(in));

                String tmpString = "";
                StringBuilder retJSON = new StringBuilder();
                while ((tmpString = reader.readLine()) != null) {
                    retJSON.append(tmpString + "\n");
                }

                JSONObject jsonObject = new JSONObject(retJSON.toString());
                String code = jsonObject.getString("code");

                if (code.equals("0")) {
                    JSONObject data = jsonObject.getJSONObject("data");
                    IP = data.getString("ip") + "(" + data.getString("country")
                            + data.getString("area") + "区"
                            + data.getString("region") + data.getString("city")
                            + data.getString("isp") + ")";

                    Log.e("提示", "您的IP地址是：" + IP);
                } else {
                    IP = "";
                    Log.e("提示", "IP接口异常，无法获取IP地址！");
                }
            } else {
                IP = "";
                Log.e("提示", "网络连接异常，无法获取IP地址！");
            }
        } catch (Exception e) {
            IP = "";
            Log.e("提示", "获取IP地址时出现异常，异常信息是：" + e.toString());
        }
        return IP;
    }
}

Android 获取设备公网IP/私网IP地址

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