Unhandled Exception: SocketException: Connection timed out

Bonjour,

J'apprends le DART, et j'utilise le connector MySQL "mysql1".
J'ai l'erreur suivante :

Citation:

E/flutter (32240): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: SocketException: Connection timed out, host: localhost, port: 3306
E/flutter (32240): #0 _NativeSocket.connect.<anonymous closure>.<anonymous closure> (dart:io-patch/socket_patch.dart:988:11)
E/flutter (32240): #1 _RootZone.run (dart:async/zone.dart:1655:54)

main.dart :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
import 'package:flutter/material.dart';
import 'connectionDatabase.dart';
 
void main() {
  runApp(const MyApp());
}
 
class MyApp extends StatelessWidget {
  const MyApp({super.key});
 
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Page d\'accueil'),
    );
  }
}
 
class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;
 
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}
 
class _MyHomePageState extends State<MyHomePage> {
 
  var db = ConnectionDatabase();
  var name = '';
 
  void _getCustomer(){
    print('_getCustomer');
    db.getConnection().then((conn) {
      String sql = 'SELECT name FROM users WHERE id=1;';
      print('_getCustomer2');
      conn.query(sql).then((results){
        for(var row in results) {
          setState(() {
            name = row[0];
            print('The value of the input is: $name');
          });
        }
      });
      conn.close();
    });
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'Name :',
            ),
            Text(
              name,
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _getCustomer,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

connectionDatabase.dart :

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
import 'dart:async';
import 'package:mysql1/mysql1.dart';
 
class ConnectionDatabase {
  static String host = 'localhost',
                user = 'chopetondiplome',
                password = "chopetondiplome",
                db = 'chopetondiplome';
  static int port = 3306;
 
  ConnectionDatabase();
 
  Future<MySqlConnection> getConnection() async {
    var settings = ConnectionSettings(
      host: host,
      port: port,
      user: user,
      password: password,
      db: db
    );
    print(host);
    return await MySqlConnection.connect(settings);
  }
}

Une idée du problème ? merci