Here you can find the source of isWifiOnline(Context context)
public static boolean isWifiOnline(Context context)
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.NetworkInfo.State; public class Main { public static boolean isWifiOnline(Context context) { ConnectivityManager conMan = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI) .getState();/*from w w w . j a v a 2s . co m*/ if (wifi == NetworkInfo.State.CONNECTED) return true; else return false; } }