Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; public class Main { private static Context context; public static boolean checkNetwork() { boolean flag = false; ConnectivityManager cwjManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (cwjManager.getActiveNetworkInfo() != null) flag = cwjManager.getActiveNetworkInfo().isAvailable(); return flag; } }