Java tutorial
//package com.java2s; //License from project: Open Source License import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static int isNetworkAvailable(Context context) { ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null) { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null) { for (NetworkInfo anInfo : info) { if (anInfo.getState() == NetworkInfo.State.CONNECTED) { if (anInfo.getType() == ConnectivityManager.TYPE_WIFI) { return 1; } else if (anInfo.getType() == ConnectivityManager.TYPE_MOBILE) { String extraInfo = anInfo.getExtraInfo(); if ("cmwap".equalsIgnoreCase(extraInfo) || "cmwap:gsm".equalsIgnoreCase(extraInfo)) { return 2; } return 3; } } } } } return 0; } }