NoSuchMethodError: 'dart.global.firebase.auth' in the Flutter Chat App - firebase

Question

I was creating this Chat App and after implementing the search function I encountered this NoSuchMethodError: tried to call a non-function, such as null: 'dart.global.firebase.auth' problem.
So basically now when I sign up the email and username doesn't get uploaded to firebase auth and Cloud Firestore, which earlier used to happen I think I did some mistake in the search.dart file which seems weird to me.
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:intro/helper/constants.dart';
import 'package:intro/services/database.dart';
import 'package:intro/widgets/widgets.dart';
import 'conversation_screen.dart';
class SearchScreen extends StatefulWidget {
#override
_SearchScreenState createState() => _SearchScreenState();
}
class _SearchScreenState extends State<SearchScreen> {
DatabaseMethods databaseMethods = new DatabaseMethods();
TextEditingController searchTextEditingController =
new TextEditingController();
QuerySnapshot searchSnapshot;
Widget searchList() {
return searchSnapshot != null
? ListView.builder(
itemCount: searchSnapshot.docs.length,
shrinkWrap: true,
itemBuilder: (context, index) {
return searchTile(
searchSnapshot.docs[index].data()["name"],
searchSnapshot.docs[index].data()["email"],
);
})
: Container();
}
initiateSearch() {
databaseMethods
.getUserByUsername(searchTextEditingController.text)
.then((val) {
setState(() {
searchSnapshot = val;
});
});
}
createChatroomAndStartConversation({String userName}) {
String chatRoomId = getChatRoomId(userName, Constants.myName);
List<String> users = [userName, Constants.myName];
Map<String, dynamic> chatRoomMap = {
"users": users,
"chatroomid": chatRoomId
};
DatabaseMethods().createChatRoom(chatRoomId, chatRoomMap);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ConversationScreen(),
));
}
Widget searchTile(String userName, String userEmail) {
return Container(
padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
child: Row(
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(userName, style: mediumTextStyle()),
Text(userEmail, style: mediumTextStyle())
],
),
Spacer(),
GestureDetector(
onTap: () {
createChatroomAndStartConversation(userName: userName);
},
child: Container(
decoration: BoxDecoration(
color: Colors.blue, borderRadius: BorderRadius.circular(30)),
padding: EdgeInsets.symmetric(horizontal: 16, vertical: 6),
child: Text(
"Message",
style: mediumTextStyle(),
),
),
)
],
),
);
}
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: appBarMain(context),
body: Container(
child: Column(
children: [
Container(
color: Color(0x54FFFFFF),
padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
child: Row(children: [
Expanded(
child: TextField(
controller: searchTextEditingController,
style: TextStyle(
color: Colors.white,
),
decoration: InputDecoration(
hintText: "Search Username",
hintStyle: TextStyle(
color: Colors.white54,
),
border: InputBorder.none),
),
),
GestureDetector(
onTap: () {
initiateSearch();
},
child: Container(
height: 35,
width: 35,
decoration: BoxDecoration(
gradient: LinearGradient(colors: [
const Color(0x36FFFFFF),
const Color(0x0FFFFFFF)
]),
borderRadius: BorderRadius.circular(30)),
padding: EdgeInsets.all(1),
child: Icon(
Icons.search,
color: Colors.white,
)),
)
]),
),
searchList()
],
),
),
);
}
}
getChatRoomId(String a, String b) {
if (a.substring(0, 1).codeUnitAt(0) > b.substring(0, 1).codeUnitAt(0)) {
return "$b\_$a";
} else {
return "$a\_$b";
}
}
and just in case there is an error with the signUp.dart file here it is.
import 'package:flutter/material.dart';
import 'package:intro/helper/helperfunctions.dart';
import 'package:intro/services/auth.dart';
import 'package:intro/services/database.dart';
import 'package:intro/widgets/widgets.dart';
import 'chatRoomsScreen.dart';
class SignUp extends StatefulWidget {
final Function toggle;
SignUp(this.toggle);
#override
_SignUpState createState() => _SignUpState();
}
class _SignUpState extends State<SignUp> {
bool isLoading = false;
AuthMethods authMethods = new AuthMethods();
DatabaseMethods databaseMethods = new DatabaseMethods();
final formKey = GlobalKey<FormState>();
TextEditingController userNameTextEditingController =
new TextEditingController();
TextEditingController emailTextEditingController =
new TextEditingController();
TextEditingController passwordTextEditingController =
new TextEditingController();
signMeUP() {
if (formKey.currentState.validate()) {
Map<String, String> userInfoMap = {
"name": userNameTextEditingController.text,
"email": emailTextEditingController.text,
};
HelperFunctions.saveUserEmailSharedPreference(
emailTextEditingController.text);
HelperFunctions.saveUserNameSharedPreference(
userNameTextEditingController.text);
setState(() {
isLoading = true;
});
authMethods
.signUpwithemailandpassword(emailTextEditingController.text,
passwordTextEditingController.text)
.then((value) {
// print("$value.uid");
databaseMethods.uploadUserInfo(userInfoMap);
HelperFunctions.saveUserLoggedInSharedPreference(true);
Navigator.pushReplacement(
context, MaterialPageRoute(builder: (context) => ChatRoom()));
});
}
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: appBarMain(context),
body: isLoading
? Container(
child: Center(child: CircularProgressIndicator()),
)
: SingleChildScrollView(
child: Container(
height: MediaQuery.of(context).size.height - 60,
alignment: Alignment.bottomCenter,
child: Container(
padding: EdgeInsets.symmetric(horizontal: 24),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Form(
key: formKey,
child: Column(
children: [
TextFormField(
validator: (val) {
return val.isEmpty || val.length < 2
? "Invalid Username (Needs to be more than 2 characters)"
: null;
},
controller: userNameTextEditingController,
style: simpleTextStyle(),
decoration: textfieldInputDecoration("username"),
),
TextFormField(
validator: (val) {
return RegExp(
r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+#[a-zA-Z0-9]+\.[a-zA-Z]+")
.hasMatch(val)
? null
: "Enter correct email";
},
controller: emailTextEditingController,
style: simpleTextStyle(),
decoration: textfieldInputDecoration("email"),
),
TextFormField(
obscureText: true,
validator: (val) {
return val.length < 6
? "Please provide with 6+ character"
: null;
},
controller: passwordTextEditingController,
style: simpleTextStyle(),
decoration: textfieldInputDecoration("password"),
),
],
),
),
SizedBox(
height: 10,
),
Container(
alignment: Alignment.centerRight,
child: Container(
padding:
EdgeInsets.symmetric(horizontal: 16, vertical: 8),
child: Text(
"Forgot Password?",
style: simpleTextStyle(),
),
),
),
SizedBox(
height: 10,
),
GestureDetector(
onTap: () {
signMeUP();
},
child: Container(
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
padding: EdgeInsets.symmetric(vertical: 20),
decoration: BoxDecoration(
gradient: LinearGradient(colors: [
const Color(0xff007EF4),
const Color(0xff2A75BC)
]),
borderRadius: BorderRadius.circular(30)),
child: Text("Sign Up", style: mediumTextStyle()),
),
),
SizedBox(
height: 10,
),
Container(
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
padding: EdgeInsets.symmetric(vertical: 20),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(30)),
child: Text("Sign Up with Google",
style:
TextStyle(color: Colors.black, fontSize: 18)),
),
SizedBox(
height: 15,
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"Already have an account? ",
style: mediumTextStyle(),
),
GestureDetector(
onTap: () {
widget.toggle();
},
child: Container(
padding: EdgeInsets.symmetric(vertical: 8),
child: Text(
"Sign in now",
style: TextStyle(
color: Colors.white,
fontSize: 17,
decoration: TextDecoration.underline),
),
),
),
],
),
SizedBox(
height: 50,
)
],
),
),
),
),
);
}
}
And if there is any file anyone of you want: GitHub: Chat App

Answer 1

Because you Haven't initialize the method