Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2012 Paul Bovbel, paul@bovbel.com
 * 
 * This file is part of the Mover-Bot robot platform (http://code.google.com/p/mover-bot/)
 * 
 * Mover-Bot is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this source code. If not, see http://www.gnu.org/licenses/
 */

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.util.Log;

public class Main {
    final static String TAG = "util";

    /** get first valid ipv4 address of this device */
    public static 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() && validIP(inetAddress.getHostAddress())) {
                        return inetAddress.getHostAddress();
                    }
                }
            }
        } catch (Exception e) {
            Log.e(TAG, e.toString());
        }
        return null;

    }

    /** check if string is valid ipv4 */
    public static boolean validIP(String ip) {
        if (ip == null || ip.isEmpty())
            return false;
        ip = ip.trim();
        if ((ip.length() < 6) & (ip.length() > 15))
            return false;

        try {
            Pattern pattern = Pattern.compile(
                    "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$");
            Matcher matcher = pattern.matcher(ip);
            return matcher.matches();
        } catch (Exception e) {
            return false;
        }
    }
}