根据我的测试，这是我的建议

import java.net.*;
import java.util.*;

public class hostUtil
{
   public static String HOST_NAME = null;
   public static String HOST_IPADDRESS = null;

   public static String getThisHostName ()
   {
      if (HOST_NAME == null) obtainHostInfo ();
      return HOST_NAME;
   }

   public static String getThisIpAddress ()
   {
      if (HOST_IPADDRESS == null) obtainHostInfo ();
      return HOST_IPADDRESS;
   }

   protected static void obtainHostInfo ()
   {
      HOST_IPADDRESS = "127.0.0.1";
      HOST_NAME = "localhost";

      try
      {
         InetAddress primera = InetAddress.getLocalHost();
         String hostname = InetAddress.getLocalHost().getHostName ();

         if (!primera.isLoopbackAddress () &&
             !hostname.equalsIgnoreCase ("localhost") &&
              primera.getHostAddress ().indexOf (':') == -1)
         {
            // Got it without delay!!
            HOST_IPADDRESS = primera.getHostAddress ();
            HOST_NAME = hostname;
            //System.out.println ("First try! " + HOST_NAME + " IP " + HOST_IPADDRESS);
            return;
         }
         for (Enumeration<NetworkInterface> netArr = NetworkInterface.getNetworkInterfaces(); netArr.hasMoreElements();)
         {
            NetworkInterface netInte = netArr.nextElement ();
            for (Enumeration<InetAddress> addArr = netInte.getInetAddresses (); addArr.hasMoreElements ();)
            {
               InetAddress laAdd = addArr.nextElement ();
               String ipstring = laAdd.getHostAddress ();
               String hostName = laAdd.getHostName ();

               if (laAdd.isLoopbackAddress()) continue;
               if (hostName.equalsIgnoreCase ("localhost")) continue;
               if (ipstring.indexOf (':') >= 0) continue;

               HOST_IPADDRESS = ipstring;
               HOST_NAME = hostName;
               break;
            }
         }
      } catch (Exception ex) {}
   }
}

老实说，我对代码安全只是有点熟悉，所以这可能有点像黑客。但对我来说，这是最通用的方法:

package com.my_objects.ip;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class MyIpByHost 
{
  public static void main(String a[])
  {
   try 
    {
      InetAddress host = InetAddress.getByName("nameOfDevice or webAddress");
      System.out.println(host.getHostAddress());
    } 
   catch (UnknownHostException e) 
    {
      e.printStackTrace();
    }
} }

我使用以下代码: 我使用hashCode的原因是因为当我使用getHostAddress时，我得到了一些垃圾值附加到ip地址。但是hashCode对我来说工作得很好，这样我就可以使用Formatter来获得具有正确格式的ip地址。

下面是示例输出:

1.使用 getHostAddress ： ***** IP=fe80：：65ca：a13d：ea5a：233d%rmnet_sdio0

2.使用hashCode和Formatter: ***** IP=238.194.77.212

如你所见，第二种方法正好满足了我的需求。

public String getLocalIpAddress() {
    try {
        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()) {
                    String ip = Formatter.formatIpAddress(inetAddress.hashCode());
                    Log.i(TAG, "***** IP="+ ip);
                    return ip;
                }
            }
        }
    } catch (SocketException ex) {
        Log.e(TAG, ex.toString());
    }
    return null;
}

kotlin语言。

fun contextIP(context: Context): String {
    val wm: WifiManager = context.getSystemService(Context.WIFI_SERVICE) as WifiManager
    return Formatter.formatIpAddress(wm.connectionInfo.ipAddress)
}

您不需要像目前提供的解决方案那样添加权限。以字符串形式下载此网站:

http://www.ip-api.com/json

or

http://www.telize.com/geoip

下载一个网站作为字符串可以用java代码完成:

http://www.itcuties.com/java/read-url-to-string/

像这样解析JSON对象:

https://stackoverflow.com/a/18998203/1987258

json属性“query”或“ip”包含ip地址。

 //    @NonNull
    public static String getIPAddress() {
        if (TextUtils.isEmpty(deviceIpAddress))
            new PublicIPAddress().execute();
        return deviceIpAddress;
    }

    public static String deviceIpAddress = "";

    public static class PublicIPAddress extends AsyncTask<String, Void, String> {
        InetAddress localhost = null;

        protected String doInBackground(String... urls) {
            try {
                localhost = InetAddress.getLocalHost();
                URL url_name = new URL("http://bot.whatismyipaddress.com");
                BufferedReader sc = new BufferedReader(new InputStreamReader(url_name.openStream()));
                deviceIpAddress = sc.readLine().trim();
            } catch (Exception e) {
                deviceIpAddress = "";
            }
            return deviceIpAddress;
        }

        protected void onPostExecute(String string) {
            Lg.d("deviceIpAddress", string);
        }
    }