Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *   Copyright (C)  2016 android@19code.com
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

import android.content.Context;

import android.net.wifi.WifiInfo;
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 String getIP(Context ctx) {
        WifiManager wifiManager = (WifiManager) ctx.getSystemService(Context.WIFI_SERVICE);
        return wifiManager.isWifiEnabled() ? getWifiIP(wifiManager) : getGPRSIP();
    }

    public static String getWifiIP(WifiManager wifiManager) {
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        String ip = intToIp(wifiInfo.getIpAddress());
        return ip != null ? ip : "";
    }

    public static String getGPRSIP() {
        String ip = null;
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                    .hasMoreElements();) {
                for (Enumeration<InetAddress> enumIpAddr = en.nextElement().getInetAddresses(); enumIpAddr
                        .hasMoreElements();) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()) {
                        ip = inetAddress.getHostAddress();
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
            ip = null;
        }
        return ip;
    }

    private static String intToIp(int i) {
        return (i & 0xFF) + "." + ((i >> 8) & 0xFF) + "." + ((i >> 16) & 0xFF) + "." + (i >> 24 & 0xFF);
    }
}