Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean isWifi(Context context) { ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); if (null == cm) { return false; } NetworkInfo info = cm.getActiveNetworkInfo(); if (null != info) { if (info.getType() == ConnectivityManager.TYPE_WIFI) { return true; } } return false; } }