Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { /** * method to check for network availability. returns true for available and * false for unavailable */ public static boolean isConnectionAvailable(Context context) { ConnectivityManager conn = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo wifiNetwork = conn.getNetworkInfo(ConnectivityManager.TYPE_WIFI); NetworkInfo mobileNetwork = conn.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); if (wifiNetwork != null && wifiNetwork.isAvailable() == true && wifiNetwork.isConnectedOrConnecting() == true) { return true; } else if (mobileNetwork != null && mobileNetwork.isAvailable() == true && mobileNetwork.isConnectedOrConnecting() == true) { return true; } else return false; } }