connectionType.dart

import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class ConnectionType extends StatefulWidget {
  @override
  _ConnectionTypeState createState() => _ConnectionTypeState();
}

class _ConnectionTypeState extends State<ConnectionType> {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future: Connectivity().checkConnectivity(),
      builder: (BuildContext context,
          AsyncSnapshot<ConnectivityResult> connectionType) {
        if (!connectionType.hasData) {
          return ListTile(
            title: CircularProgressIndicator(),
          );
        } else {
          return ListTile(
            title: Text('${connectionType.data}'),
          );
        }
      },
    );
  }
}