Kotlin极简版

fun getIpv4HostAddress(): String {
    NetworkInterface.getNetworkInterfaces()?.toList()?.map { networkInterface ->
        networkInterface.inetAddresses?.toList()?.find {
            !it.isLoopbackAddress && it is Inet4Address
        }?.let { return it.hostAddress }
    }
    return ""
}

你可以使用LinkProperties。建议用于新的Android版本。

此功能检索WiFi和移动数据的本地IP地址。它需要Manifest.permission。ACCESS_NETWORK_STATE许可。

@Nullable
public static String getDeviceIpAddress(@NonNull ConnectivityManager connectivityManager) {
    LinkProperties linkProperties = connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork());
    InetAddress inetAddress;
    for(LinkAddress linkAddress : linkProperties.getLinkAddresses()) {
        inetAddress = linkAddress.getAddress();
        if (inetAddress instanceof Inet4Address
                && !inetAddress.isLoopbackAddress()
                && inetAddress.isSiteLocalAddress()) {
            return inetAddress.getHostAddress();
        }
    }
    return null;
}

方法getDeviceIpAddress返回设备的ip地址，如果连接了wifi接口，则首选wifi接口地址。

  @NonNull
    private String getDeviceIpAddress() {
        String actualConnectedToNetwork = null;
        ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connManager != null) {
            NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            if (mWifi.isConnected()) {
                actualConnectedToNetwork = getWifiIp();
            }
        }
        if (TextUtils.isEmpty(actualConnectedToNetwork)) {
            actualConnectedToNetwork = getNetworkInterfaceIpAddress();
        }
        if (TextUtils.isEmpty(actualConnectedToNetwork)) {
            actualConnectedToNetwork = "127.0.0.1";
        }
        return actualConnectedToNetwork;
    }

    @Nullable
    private String getWifiIp() {
        final WifiManager mWifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        if (mWifiManager != null && mWifiManager.isWifiEnabled()) {
            int ip = mWifiManager.getConnectionInfo().getIpAddress();
            return (ip & 0xFF) + "." + ((ip >> 8) & 0xFF) + "." + ((ip >> 16) & 0xFF) + "."
                    + ((ip >> 24) & 0xFF);
        }
        return null;
    }


    @Nullable
    public String getNetworkInterfaceIpAddress() {
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
                NetworkInterface networkInterface = en.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = networkInterface.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
                        String host = inetAddress.getHostAddress();
                        if (!TextUtils.isEmpty(host)) {
                            return host;
                        }
                    }
                }

            }
        } catch (Exception ex) {
            Log.e("IP Address", "getLocalIpAddress", ex);
        }
        return null;
    }

简单地使用凌空从这个网站获得ip

RequestQueue queue = Volley.newRequestQueue(this);    
String urlip = "http://checkip.amazonaws.com/";

    StringRequest stringRequest = new StringRequest(Request.Method.GET, urlip, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            txtIP.setText(response);

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            txtIP.setText("didnt work");
        }
    });

    queue.add(stringRequest);

一个设备可能有几个IP地址，在一个特定的应用程序中使用的IP地址可能不是接收请求的服务器将看到的IP地址。事实上，一些用户使用VPN或Cloudflare Warp等代理。

如果你的目的是获得IP地址，就像服务器从你的设备接收请求一样，那么最好是通过Java客户端查询IP地理定位服务，如Ipregistry(免责声明:我为该公司工作):

https://github.com/ipregistry/ipregistry-java

IpregistryClient client = new IpregistryClient("tryout");
RequesterIpInfo requesterIpInfo = client.lookup();
requesterIpInfo.getIp();

除了使用非常简单之外，您还可以获得其他信息，例如国家、语言、货币、设备IP的时区，并且您可以识别用户是否正在使用代理。

如果你有一个壳;Ifconfig eth0也适用于x86设备