Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { /** * Detects the availability of a working Wifi network connection to open a * http/https connection. * * @param context The context of the activity who is trying to check for the * status of the network. * @return true if Wifi network is available, false otherwise. */ public static boolean isWiFiAvailable(Context context) { if (context == null) return false; ConnectivityManager conMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo wifiNetwork = conMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI); if (wifiNetwork != null && wifiNetwork.isConnected()) { return true; } else { return false; } } }