Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean isNetworkAvailable(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); NetworkInfo wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); if (mobile.isConnected() || wifi.isConnected()) { return true; } else { return false; } } }