KonectarApp/lib/contacts_module/network_connection/network_check.dart

import 'dart:async';

import 'package:connectivity_plus/connectivity_plus.dart';

class NetworkConnectivity {
  Future<bool> isInternetAvailable() async {
    var connectivityResult = await (Connectivity().checkConnectivity());
    return connectivityResult != ConnectivityResult.none;
  }
}