This file has a getx controller which has connectivity stream Subscription which give out the network status.

internet_service_controller.dart

import 'dart:async';
import 'package:flutter/services.dart';
import 'package:get/get_state_manager/get_state_manager.dart';
import 'package:connectivity_plus/connectivity_plus.dart';

class NetworkServicesController extends GetxController {
  bool connectedToNetwork = false;

  final Connectivity _connectivity = Connectivity();
  late StreamSubscription<ConnectivityResult> _connectivitySubscription;

  @override
  void onInit() {
    initConnectivity();
    _connectivitySubscription =
        _connectivity.onConnectivityChanged.listen(_updateConnectionStatus);
    super.onInit();
  }

  @override
  void dispose() {
    _connectivitySubscription.cancel();
    super.dispose();
  }

  Future<void> initConnectivity() async {
    late ConnectivityResult result;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      result = await _connectivity.checkConnectivity();
    } on PlatformException {
      return;
    }
    return _updateConnectionStatus(result);
  }

  Future<void> _updateConnectionStatus(ConnectivityResult result) async {
    if (result == ConnectivityResult.mobile ||
        result == ConnectivityResult.wifi) {
      connectedToNetwork = true;
    } else {
      connectedToNetwork = false;
    }
    update();
  }
}