Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; public class Main { public static boolean isNetworkAvailable(Context context) { ConnectivityManager connManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); return connManager.getActiveNetworkInfo() != null && connManager.getActiveNetworkInfo().isConnected(); } }