I am novice to Flutter. I was practising to develop a mobile ecommerce application. Everything was working well until I made some changes to the SignUp.dart file, which I don't know where I made changes. Now Everytime I try to run the app, it displays this error message:
'package:flutter/src/widgets/navigator.dart': Failed assertion: line 3524 pos 12: '!_debugLocked': is not true.
The full code of the signup.dart file is:
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import '../db/users.dart';
import 'home.dart';
class SignUp extends StatefulWidget {
@override
_SignUpState createState() => _SignUpState();
}
class _SignUpState extends State<SignUp> {
final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
final _formKey = GlobalKey<FormState>();
UserServices _userServices = UserServices();
TextEditingController _emailTextController = TextEditingController();
TextEditingController _passwordTextController = TextEditingController();
TextEditingController _nameTextController = TextEditingController();
TextEditingController _confirmPasswordController = TextEditingController();
String gender;
String groupValue = "male";
bool hidePass = true;
bool loading = false;
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
Image.asset(
'assets/images/background.jpg',
fit: BoxFit.cover,
width: double.infinity,
height: double.infinity,
),
//Image.asset('assets/images/logo.png'),
Container(
color: Colors.black.withOpacity(0.4),
width: double.infinity,
height: double.infinity,
),
Container(
alignment: Alignment.topCenter,
child: Image.asset(
'assets/images/logo.png',
width: 280.0,
height: 280.0,
)),
Center(
child: Padding(
padding: const EdgeInsets.only(top: 200.0),
child: Center(
child: Form(
key: _formKey,
child: ListView(
children: <Widget>[
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: Material(
borderRadius: BorderRadius.circular(10.0),
color: Colors.white.withOpacity(0.8),
elevation: 0.0,
child: Padding(
padding: const EdgeInsets.only(left: 12.0),
child: TextFormField(
controller: _nameTextController,
decoration: InputDecoration(
hintText: "Full Name",
icon: Icon(Icons.person_outline),
border: InputBorder.none),
validator: (value) {
if (value.isEmpty) {
return "The name field cannot be empty";
}
return null;
},
),
),
),
),
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: Material(
borderRadius: BorderRadius.circular(10.0),
color: Colors.white.withOpacity(0.8),
elevation: 0.0,
child: Padding(
padding: const EdgeInsets.only(left: 12.0),
child: TextFormField(
controller: _emailTextController,
decoration: InputDecoration(
hintText: "Email",
icon: Icon(Icons.alternate_email),
border: InputBorder.none),
// ignore: missing_return
validator: (value) {
if (value.isEmpty) {
Pattern pattern =
r'^(([^<>()[]\.,;:s@"]+(.[^<>()[]\.,;:s@"]+)*)|(".+"))@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}])|(([a-zA-Z-0-9]+.)+[a-zA-Z]{2,}))$';
RegExp regex = new RegExp(pattern);
if (!regex.hasMatch(value)) {
return 'Please make sure your email address is valid';
} else {
return null;
}
}
},
),
),
),
),
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: new Container(
color: Colors.white.withOpacity(0.4),
child: Row(children: <Widget>[
Expanded(
child: ListTile(
title: Text(
"Male",
textAlign: TextAlign.end,
style: TextStyle(color: Colors.white),
),
trailing: Radio(
value: "male",
groupValue: groupValue,
onChanged: (e) => valueChanged(e)),
)),
Expanded(
child: ListTile(
title: Text(
"Female",
textAlign: TextAlign.end,
style: TextStyle(color: Colors.white),
),
trailing: Radio(
value: "female",
groupValue: groupValue,
onChanged: (e) => valueChanged(e)),
)),
]),
),
),
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: Material(
borderRadius: BorderRadius.circular(10.0),
color: Colors.white.withOpacity(0.8),
elevation: 0.0,
child: Padding(
padding: const EdgeInsets.only(left: 12.0),
child: ListTile(
title: TextFormField(
controller: _passwordTextController,
obscureText: hidePass,
decoration: InputDecoration(
hintText: "Password",
icon: Icon(Icons.lock_outline),
border: InputBorder.none),
validator: (value) {
if (value.isEmpty) {
return "The password field cannot be empty";
} else if (value.length < 6) {
return "The password must be at least 6 characters long";
}
return null;
},
),
trailing: IconButton(
icon: Icon(Icons.remove_red_eye),
onPressed: () {
setState(() {
hidePass = false;
});
}),
),
),
),
),
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: Material(
borderRadius: BorderRadius.circular(10.0),
color: Colors.white.withOpacity(0.8),
elevation: 0.0,
child: Padding(
padding: const EdgeInsets.only(left: 12.0),
child: ListTile(
title: TextFormField(
controller: _confirmPasswordController,
obscureText: hidePass,
decoration: InputDecoration(
hintText: "Confirm Password",
icon: Icon(Icons.lock_outline),
border: InputBorder.none),
validator: (value) {
if (value.isEmpty) {
return "The password field cannot be empty!";
} else if (value.length < 6) {
return "The password must be at least 6 characters long!";
} else if (_passwordTextController.text !=
value) {
return "Passwords do not match!";
}
return null;
},
),
trailing: IconButton(
icon: Icon(Icons.remove_red_eye),
onPressed: () {
setState(() {
hidePass = false;
});
}),
),
),
),
),
Expanded(child: Container()),
Padding(
padding:
const EdgeInsets.fromLTRB(14.0, 8.0, 14.0, 8.0),
child: Material(
borderRadius: BorderRadius.circular(20.0),
