Java tutorial
//package com.java2s; /* This file is part of the Diaspora Native WebApp. Diaspora Native WebApp 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. Diaspora Native WebApp 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 the Diaspora Native WebApp. 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 isOnline(Context context) { ConnectivityManager cnm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo ni = cnm.getActiveNetworkInfo(); return ni != null && ni.isConnectedOrConnecting(); } }