Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean isNetworkConnected(Context context) { boolean resp = false; final ConnectivityManager connMgr = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetInfo = connMgr.getActiveNetworkInfo(); if (activeNetInfo != null && activeNetInfo.isAvailable()) { resp = true; } return resp; } }