MDSADABWASIM

import 'dart.io'; //use this 

bool connected=false; // and define this global variable.

 Future<bool> _checkConnectivity() async {
    bool connect;
    try {
      final result = await InternetAddress.lookup('google.com');
      if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {
        connect = true;