Я новичок во флаттере, работаю над проектом флаттера с Firebase для Auth, и я хочу войти в Google автоматически, но я не знаю как. Кто-нибудь может мне помочь, вот мой основной и файлы аутентификации:
import 'package:flutter/material.dart';
import 'package:flutter_complete_guide/screens/products_overview_screen.dart';
import 'package:flutter_complete_guide/screens/recording_screen.dart';
import 'package:provider/provider.dart';
import './providers/auth.dart';
import './screens/auth_screen.dart';
import './screens/splash_screen.dart';
import './screens/google_screen.dart';
import './screens/products_overview_screen.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider.value(
value: Auth(),
),
],
child: Consumer<Auth>(
builder: (ctx, auth, _) => MaterialApp(
title: 'MyShop',
theme: ThemeData(
primarySwatch: Colors.purple,
accentColor: Colors.deepOrange,
fontFamily: 'Lato',
),
home: auth.isAuth
? ProductsOverviewScreen()
: FutureBuilder(
future: auth.tryAutoLogin(),
builder: (ctx, authResultSnapshot) =>
authResultSnapshot.connectionState ==
ConnectionState.waiting
? SplashScreen()
: AuthScreen(),
),
routes: {
Recording_screen.routeName: (ctx) => Recording_screen(),
Google.routeName: (ctx) => Google(),
ProductsOverviewScreen.routeName: (ctx) => ProductsOverviewScreen()
},
),
),
);
}
}
, а это мой файл аутентификации:
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter_complete_guide/screens/products_overview_screen.dart';
import 'package:provider/provider.dart';
import 'package:google_sign_in/google_sign_in.dart';
import '../providers/auth.dart';
import '../models/http_exception.dart';
import './google_screen.dart';
enum AuthMode { Signup, Login }
class AuthScreen extends StatelessWidget {
static const routeName = '/auth';
@override
Widget build(BuildContext context) {
final deviceSize = MediaQuery.of(context).size;
// final transformConfig = Matrix4.rotationZ(-8 * pi / 180);
// transformConfig.translate(-10.0);
return Scaffold(
// resizeToAvoidBottomInset: false,
body: Stack(
children: <Widget>[
Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
Color.fromRGBO(255, 51, 255, 1).withOpacity(0.5),
Color.fromRGBO(255, 128, 0, 1).withOpacity(0.9),
],
begin: Alignment.topLeft,
end: Alignment.bottomRight,
stops: [0, 1],
),
),
),
SingleChildScrollView(
child: Container(
height: deviceSize.height,
width: deviceSize.width,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Flexible(
child: Container(
margin: EdgeInsets.only(bottom: 20.0, left: 12),
padding:
EdgeInsets.symmetric(vertical: 8.0, horizontal: 94.0),
transform: Matrix4.rotationZ(-8 * pi / 235)
..translate(-10.0),
// ..translate(-10.0),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: Colors.deepOrange.shade800,
boxShadow: [
BoxShadow(
blurRadius: 8,
color: Colors.black26,
offset: Offset(0, 2),
)
],
),
child: Text(
'Chit-Chat',
style: TextStyle(
color: Theme.of(context).accentTextTheme.title.color,
fontSize: 43,
fontFamily: 'Anton',
fontWeight: FontWeight.normal,
),
),
),
),
Flexible(
flex: deviceSize.width > 600 ? 2 : 1,
child: AuthCard(),
),
],
),
),
),
],
),
);
}
}
class AuthCard extends StatefulWidget {
const AuthCard({
Key key,
}) : super(key: key);
@override
_AuthCardState createState() => _AuthCardState();
}
class _AuthCardState extends State<AuthCard> {
bool _isLoggedIn = false;
GoogleSignIn _googleSignIn = GoogleSignIn(scopes: ['email']);
final GlobalKey<FormState> _formKey = GlobalKey();
AuthMode _authMode = AuthMode.Login;
Map<String, String> _authData = {
'email': '',
'password': '',
};
var _isLoading = false;
final _passwordController = TextEditingController();
Future<void> _loginGoogle() async {
try {
await _googleSignIn.signIn();
setState(() {
_isLoggedIn = true;
});
} catch (err) {
print(err);
}
}
void _showErrorDialog(String message) {
showDialog(
context: context,
builder: (ctx) => AlertDialog(
title: Text('An Error Occurred!'),
content: Text(message),
actions: <Widget>[
FlatButton(
child: Text('Okay'),
onPressed: () {
Navigator.of(ctx).pop();
},
)
],
),
);
}
Future<void> _submit() async {
if (!_formKey.currentState.validate()) {
// Invalid!
return;
}
_formKey.currentState.save();
setState(() {
_isLoading = true;
});
try {
if (_authMode == AuthMode.Login) {
// Log user in
await Provider.of<Auth>(context, listen: false).login(
_authData['email'],
_authData['password'],
);
} else {
// Sign user up
await Provider.of<Auth>(context, listen: false).signup(
_authData['email'],
_authData['password'],
);
}
} on HttpException catch (error) {
var errorMessage = 'Authentication failed';
if (error.toString().contains('EMAIL_EXISTS')) {
errorMessage = 'This email address is already in use.';
} else if (error.toString().contains('INVALID_EMAIL')) {
errorMessage = 'This is not a valid email address';
} else if (error.toString().contains('WEAK_PASSWORD')) {
errorMessage = 'This password is too weak.';
} else if (error.toString().contains('EMAIL_NOT_FOUND')) {
errorMessage = 'Could not find a user with that email.';
} else if (error.toString().contains('INVALID_PASSWORD')) {
errorMessage = 'Invalid password.';
}
_showErrorDialog(errorMessage);
} catch (error) {
const errorMessage =
'Could not authenticate you. Please try again later.';
_showErrorDialog(errorMessage);
}
setState(() {
_isLoading = false;
});
}
void _switchAuthMode() {
if (_authMode == AuthMode.Login) {
setState(() {
_authMode = AuthMode.Signup;
});
} else {
setState(() {
_authMode = AuthMode.Login;
});
}
}
@override
Widget build(BuildContext context) {
final deviceSize = MediaQuery.of(context).size;
return Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
elevation: 8.0,
child: Container(
height: _authMode == AuthMode.Signup ? 320 : 260,
constraints:
BoxConstraints(minHeight: _authMode == AuthMode.Signup ? 320 : 260),
width: deviceSize.width * 0.75,
padding: EdgeInsets.all(16.0),
child: Form(
key: _formKey,
child: SingleChildScrollView(
child: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'E-Mail'),
keyboardType: TextInputType.emailAddress,
validator: (value) {
if (value.isEmpty || !value.contains('@')) {
return 'Invalid email!';
}
},
onSaved: (value) {
_authData['email'] = value;
},
),
TextFormField(
decoration: InputDecoration(labelText: 'Password'),
obscureText: true,
controller: _passwordController,
validator: (value) {
if (value.isEmpty || value.length < 5) {
return 'Password is too short!';
}
},
onSaved: (value) {
_authData['password'] = value;
},
),
if (_authMode == AuthMode.Signup)
TextFormField(
enabled: _authMode == AuthMode.Signup,
decoration: InputDecoration(labelText: 'Confirm Password'),
obscureText: true,
validator: _authMode == AuthMode.Signup
? (value) {
if (value != _passwordController.text) {
return 'Passwords do not match!';
}
}
: null,
),
SizedBox(
height: 20,
),
if (_isLoading)
CircularProgressIndicator()
else
RaisedButton(
child:
Text(_authMode == AuthMode.Login ? 'LOGIN' : 'SIGN UP'),
onPressed: _submit,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(30),
),
padding:
EdgeInsets.symmetric(horizontal: 30.0, vertical: 8.0),
color: Theme.of(context).primaryColor,
textColor: Theme.of(context).primaryTextTheme.button.color,
),
FlatButton(
child: Text(
'${_authMode == AuthMode.Login ? 'SIGNUP' : 'LOGIN'} INSTEAD'),
onPressed: _switchAuthMode,
padding: EdgeInsets.symmetric(horizontal: 30.0, vertical: 4),
materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
textColor: Theme.of(context).primaryColor,
),
Center(
child: _isLoggedIn
? Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Image.network(
_googleSignIn.currentUser.photoUrl,
height: 50.0,
width: 50.0,
),
Text(_googleSignIn.currentUser.displayName),
],
)
: Center(
child: OutlineButton(
child: Text("Login with Google"),
onPressed: () {
_loginGoogle();
Navigator.of(context).pushReplacementNamed(
ProductsOverviewScreen.routeName);
},
),
)),
],
),
),
),
),
);
}
}