Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2015 btows.com. * * 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 3 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, see <http://www.gnu.org/licenses/>. ******************************************************************************/ import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean canNetworkUseful(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getApplicationContext() .getSystemService(Context.CONNECTIVITY_SERVICE); if (manager == null) { return false; } NetworkInfo networkinfo = manager.getActiveNetworkInfo(); if (networkinfo == null || !networkinfo.isAvailable()) { return false; } return true; } }