Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2013 Thomas Schmid
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */

import android.content.Context;

import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class Main {
    /**
     * Used to determine if there is an active data connection and what type of
     * connection it is if there is one
     * 
     * @param context The {@link Context} to use
     * @return True if there is an active data connection, false otherwise.
     *         Also, if the user has checked to only download via Wi-Fi in the
     *         settings, the mobile data and other network connections aren't
     *         returned at all
     */
    public static final boolean isOnline(final Context context) {
        /*
         * This sort of handles a sudden configuration change, but I think it
         * should be dealt with in a more professional way.
         */
        if (context == null) {
            return false;
        }

        boolean state = false;

        /* Monitor network connections */
        final ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        /* Wi-Fi connection */
        final NetworkInfo wifiNetwork = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (wifiNetwork != null) {
            state = wifiNetwork.isConnectedOrConnecting();
        }

        /* Mobile data connection */
        final NetworkInfo mbobileNetwork = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (mbobileNetwork != null) {
            state = mbobileNetwork.isConnectedOrConnecting();
        }

        /* Other networks */
        final NetworkInfo activeNetwork = connectivityManager.getActiveNetworkInfo();
        if (activeNetwork != null) {
            state = activeNetwork.isConnectedOrConnecting();
        }

        return state;
    }
}