Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;

import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;

import android.util.Log;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class Main {
    /**
     * The constant TAG.
     */
    public static final String TAG = "DeviceUtil";
    private static ConnectivityManager connectivityManager;
    private static Context mContext;

    /**
     * Gets ip.
     *
     * @return the ip
     */
    public static String getIp() {
        String res = null;
        if (isWifiConnected()) {
            res = getIpUnderWifi();
        } else {
            res = getIpWithoutWifi();
        }
        return res;
    }

    public static boolean isWifiConnected() {
        NetworkInfo ni = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        return ni.isConnected();
    }

    private static String getIpUnderWifi() {
        WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
        int ipAddress = wifiManager.getConnectionInfo().getIpAddress();
        Log.w(TAG, "getIp  isWifiConnected  ipaddress=" + ipAddress);
        return String.format("%d.%d.%d.%d", ipAddress & 0xff, ipAddress >> 8 & 0xff, ipAddress >> 16 & 0xff,
                ipAddress >> 24 & 0xff);
    }

    public static String getIpWithoutWifi() {
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                    .hasMoreElements();) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration<InetAddress> enumeration = intf.getInetAddresses(); en.hasMoreElements();) {
                    InetAddress inetAddress = enumeration.nextElement();
                    if (inetAddress.isLoopbackAddress()) {
                        return inetAddress.getHostAddress().toString();
                    }
                }
            }
        } catch (Exception e) {
            Log.w(TAG, "getIpWithoutWifi error:" + e.getMessage());
        }
        return null;
    }
}