get Wifi IP Address - Android Wifi

Android examples for Wifi:Wifi Address

  1. HOME
  2. Android
  3. Wifi
  4. Wifi Address

Description

get Wifi IP Address

Demo Code


//package com.java2s;
import android.net.wifi.WifiManager;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class Main {
    public static InetAddress getWifiIPAddress(WifiManager wifiManager) {

        Enumeration<NetworkInterface> interfaces;
        try {/* w  w w  .  j a  v a 2  s. co  m*/
            interfaces = NetworkInterface.getNetworkInterfaces();
        } catch (SocketException e) {
            return null;
        }

        int wifiIP = wifiManager.getConnectionInfo().getIpAddress();
        int reverseWifiIP = Integer.reverseBytes(wifiIP);

        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            Enumeration<InetAddress> availableLocalAddresses = networkInterface
                    .getInetAddresses();
            while (availableLocalAddresses.hasMoreElements()) {
                InetAddress inetAddress = availableLocalAddresses
                        .nextElement();
                int currentAddressByteArray = byteArrayToInt(
                        inetAddress.getAddress(), 0);
                if ((currentAddressByteArray == wifiIP)
                        || (currentAddressByteArray == reverseWifiIP)) {
                    return inetAddress;
                }
            }
        }
        return null;
    }

    public static int byteArrayToInt(byte[] arr, int offset) {
        if (arr == null || arr.length - offset < 4)
            return -1;

        int r0 = (arr[offset] & 0xFF) << 24;
        int r1 = (arr[offset + 1] & 0xFF) << 16;
        int r2 = (arr[offset + 2] & 0xFF) << 8;
        int r3 = arr[offset + 3] & 0xFF;
        return r0 + r1 + r2 + r3;
    }
}

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