Android开发获取内网和外网IP地址的工具类

佚名RJ 发表于 2021-1-14 18:54

本帖最后由佚名RJ 于 2021-1-15 09:11 编辑

### 1.添加相关权限

```xml

<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
```

### 2.获取内网和外网IP地址工具类
```java
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.util.Enumeration;

/**
* @Author: yirj
* @Date: 2021/1/14 15:15
* @Remark: Android开发获取内网IP地址和外网IP地址的工具类
*/
public class IpUtils {
/**
* 获取内网IP地址的方法
*
* @return
*/
public static String getIpAddress() {
   try {
         for (Enumeration<NetworkInterface> enNetI = NetworkInterface.getNetworkInterfaces(); enNetI
               .hasMoreElements(); ) {
            NetworkInterface netI = enNetI.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = netI.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
               InetAddress inetAddress = enumIpAddr.nextElement();
               if (inetAddress instanceof Inet4Address && !inetAddress.isLoopbackAddress()) {
                     String aa = inetAddress.getHostAddress();
//                      System.out.println("当前内网IP测试："+aa);
                     return inetAddress.getHostAddress();
               }
            }
         }
   } catch (SocketException e) {
         e.printStackTrace();
   }
   return "";
}

/**
* 获取外网ip地址的方法1--网页信息格式
* @return
*/
public static String getOutNetIP() {
   String ipAddress = "";
   try {
         String address = "http://www.3322.org/dyndns/getip"; //单独只有IP外网地址的API
//          String address = "https://ifconfig.co/json"; //json格式信息的API，使用这个自己搞代码
//          String address = "http://pv.sohu.com/cityjson?ie=utf-8"; //json格式信息的API，下面有一个使用案例。
         URL url = new URL(address);

         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");
            }
            ipAddress = retJSON.toString();
//             System.out.println("当前外网IP测试："+ipAddress);
         } else {
            System.out.println("网络连接异常，无法获取IP地址！");
         }
   } catch (Exception e) {
   }
   return ipAddress;
}

/**
* 获取外网ip地址的方法2--Json格式
* @return
*/
public static String GetNetIp() {
   URL infoUrl = null;
   InputStream inStream = null;
   String line = "";
   try {
         infoUrl = new URL("http://pv.sohu.com/cityjson?ie=utf-8"); //json格式信息的API，使用案例。
         URLConnection connection = infoUrl.openConnection();
         HttpURLConnection httpConnection = (HttpURLConnection) connection;
         int responseCode = httpConnection.getResponseCode();
         if (responseCode == HttpURLConnection.HTTP_OK) {
            inStream = httpConnection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inStream, "utf-8"));
            StringBuilder strber = new StringBuilder();
            while ((line = reader.readLine()) != null)
               strber.append(line + "\n");
            inStream.close();
            // 从反馈的结果中提取出IP地址
            int start = strber.indexOf("{");
            int end = strber.indexOf("}");
            String json = strber.substring(start, end + 1);
            if (json != null) {
               try {
                     JSONObject jsonObject = new JSONObject(json);
                     line = jsonObject.optString("cip");
//                      System.out.println("IP："+line);
               } catch (JSONException e) {
                     e.printStackTrace();
               }
            }
            return line;
         }
   } catch (MalformedURLException e) {
         e.printStackTrace();
   } catch (IOException e) {
         e.printStackTrace();
   }
   return line;
}
}

```
### 3.工具类测试及使用
```java
import org.junit.Test;

/**
* @Author: yirj
* @Date: 2021/1/14 15:19
* @Remark: 测试--网页信息格式获取
*/
public class IpUtilsTest {

@Test
public void getOutNetIP() {
   String s = IpUtils.getIpAddress();
   System.out.println("内网IP地址：" + s);
   String s1 = IpUtils.getOutNetIP();
   System.out.println("外网IP地址：" + s1);
}
}
```

```java
   /**
      * @Author: yirj
      * @Date: 2021/1/14 15:19
      * @Remark: 测试--Json格式(推荐)--可在任意位置随意调用
      */
   new Thread(new Runnable() {
         @Override
         public void run() {
            //获取内外网IP地址并输出
            String ipAddress = IpUtils.getIpAddress();
            String outNetIP = IpUtils.GetNetIp();
            System.out.println("内网IP地址："+ipAddress+" "+"外网IP地址："+outNetIP);
         }
   }).start();
```
**上面代码中还有另一个返回JSON格式的API，想深入研究的小伙伴，可以根据那个再试着搞一搞！**

coolsnake 发表于 2021-1-14 20:51

谢谢分享！

pearpear888 发表于 2021-1-18 14:16

感谢分享

CTQ54250 发表于 2021-3-13 12:15

感谢分享。虽然有点尴尬，但是我还想说copy就是好。我内网的用的比较多，外网的不怎么用。

sivanliu 发表于 2022-6-27 09:37

谢谢分享

江晨江 发表于 2022-7-9 11:29

收藏,收藏

jiale625 发表于 2022-7-11 11:43

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Android开发获取内网和外网IP地址的工具类