When I navigate my chat page, I see this error in red screen on emulator.
No idea why it does not work. Does anyone know how to solve it?
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import '../chat/chat.dart';
class ChatHome extends StatefulWidget {
@override
_ChatHomeState createState() => _ChatHomeState();
}
class _ChatHomeState extends State<ChatHome> {
var _db = FirebaseFirestore.instance;
TextEditingController userController;
final _scaffKey = GlobalKey<ScaffoldState>();
@override
void initState() {
super.initState();
userController = new TextEditingController();
setState(() {});
}
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffKey,
floatingActionButton: FloatingActionButton(
onPressed: () {
showDialog(
// barrierDismissible: false,
context: context,
builder: (context) => _buildPopUpMessage(context),
);
},
splashColor: Theme.of(context).colorScheme.onSecondary,
child: Icon(
Icons.add,
),
),
body: FutureBuilder(
future: getPosts(),
builder: (_, snapshot) {
if (snapshot.hasData) {
String myId = snapshot.data['id'];
return StreamBuilder(
stream: getChats(myId),
builder: (context, snapshot) {
if (snapshot.hasData) {
QuerySnapshot qSnap = snapshot.data;
List<DocumentSnapshot> docs = qSnap.docs;
if (docs.length == 0)
return Center(
child: Text('No Chats yet!'),
);
return ListView.builder(
itemCount: docs.length,
itemBuilder: (context, index) {
List<dynamic> members = docs[index].data()['members'];
String userId;
userId = members.elementAt(0) == myId
? members.elementAt(1)
: members.elementAt(0);
return FutureBuilder(
future: getUserByUsername(userId),
builder: (context, _snapshot) {
if (_snapshot.hasData) {
DocumentSnapshot docSnapUser = _snapshot.data;
Map<String, dynamic> _user = docSnapUser.data();
return Card(
margin: EdgeInsets.all(8.0),
elevation: 8.0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(5.0),
),
child: InkWell(
splashColor:
Theme.of(context).colorScheme.primary,
onTap: () => Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Chat(
peerId: _user["id"],
peerAvatar: _user['photoUrl'],
))),
child: Container(
margin: EdgeInsets.all(10.0),
height:
MediaQuery.of(context).size.height * 0.08,
child: Center(
child: Row(
children: [
Hero(
tag: _user['photoUrl'],
child: Container(
width: MediaQuery.of(context)
.size
.width *
0.15,
height: MediaQuery.of(context)
.size
.width *
0.15,
decoration: new BoxDecoration(
shape: BoxShape.circle,
image: new DecorationImage(
fit: BoxFit.cover,
image: new NetworkImage(
_user['photoUrl']),
),
),
),
),
SizedBox(
width: MediaQuery.of(context)
.size
.width *
0.02,
),
SizedBox(
width: MediaQuery.of(context)
.size
.width *
0.43,
child: Text(
_user['nickname'],
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
),
),
),
],
),
),
),
),
);
}
return Card(
margin: EdgeInsets.all(8.0),
elevation: 8.0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(5.0),
),
child: Container(
margin: EdgeInsets.all(10.0),
height: MediaQuery.of(context).size.height * 0.08,
child: Center(
child: CircularProgressIndicator(
valueColor: new AlwaysStoppedAnimation(
Theme.of(context).colorScheme.primary,
),
),
),
),
);
},
);
},
);
}
return Center(
child: CircularProgressIndicator(
valueColor: new AlwaysStoppedAnimation(
Theme.of(context).colorScheme.primary,
),
),
);
},
);
}
return Center(
child: CircularProgressIndicator(
valueColor: new AlwaysStoppedAnimation(
Theme.of(context).colorScheme.primary,
),
),
);
},
),
);
}
Widget _timeDivider(Timestamp time) {
DateTime t = time.toDate();
String minute =
t.minute > 9 ? t.minute.toString() : '0' + t.minute.toString();
String ampm = t.hour >= 12 ? "PM" : "AM";
int hour = t.hour >= 12 ? t.hour % 12 : t.hour;
DateTime press = DateTime.now();
if (press.year == t.year && press.month == t.month && press.day == t.day)
return Text(hour.toString() + ':' + minute + ' ' + ampm);
return Text(t.day.toString() +
'/' +
(t.month + 1).toString() +
'/' +
t.year.toString());
}
Widget _buildPopUpMessage(context) {
return Align(
alignment: Alignment.topCenter,
child: Container(
padding: EdgeInsets.all(8.0),
height: MediaQuery.of(context).size.width * .5,
width: MediaQuery.of(context).size.width * .6,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(40),
),
margin: EdgeInsets.only(bottom: 50, left: 12, right: 12, top: 50),
child: SingleChildScrollView(
child: Column(
children: <Widget>[
SizedBox(
height: MediaQuery.of(context).size.width * .1,
child: Center(
child: new RichText(
text: new TextSpan(
style: new TextStyle(
fontSize: 14.0,
color: Colors.black,
),
children: <TextSpan>[
new TextSpan(
text: 'username',
style: new TextStyle(
color: Theme.of(context).colorScheme.primary,
fontWeight: FontWeight.bold),
),
new TextSpan(
text: '@gmail.com',
),
],
),
),
),
),
SizedBox(
height: MediaQuery.of(context).size.width * .2,
child: Center(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Material(
child: TextField(
autofocus: true,
controller: userController,
decoration: new InputDecoration(
border: new OutlineInputBorder(
borderSide: BorderSide(
color: Theme.of(context).colorScheme.primary,
),
borderRadius: const BorderRadius.all(
const Radius.circular(10.0),
),
),
focusedBorder: new OutlineInputBorder(
borderSide: BorderSide(
color: Theme.of(context).colorScheme.primary,
),
borderRadius: const BorderRadius.all(
const Radius.circular(10.0),
),
),
enabledBorder: new OutlineInputBorder(
borderSide: BorderSide(
color: Theme.of(context).colorScheme.primary,
),
borderRadius: const BorderRadius.all(
const Radius.circular(10.0),
),
),
errorBorder: new OutlineInputBorder(
borderSide: BorderSide(
color: Theme.of(context).colorScheme.error,
),
borderRadius: const BorderRadius.all(
const Radius.circular(10.0),
),
),
filled: true,
hintText: "Type in only Username",
hintStyle: TextStyle(fontSize: 16.0),
),
),
),
),
),
),
SizedBox(
height: MediaQuery.of(context).size.width * .1,
child: Center(
child: Align(
alignment: Alignment.center,
child: RaisedButton(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
),
color: Theme.of(context).colorScheme.secondary,
child: Text(
'Let\'s chat with your friend.',
style: TextStyle(
color: Theme.of(context).colorScheme.onSecondary),
),
onPressed: () async {
if (userController.text.isNotEmpty) {
String username = userController.text.toString();
userController.clear();
QuerySnapshot doc =
getUserByEmail(username + '@gmail.com');
if (doc.docs.length != 0) {
DocumentSnapshot user = doc.docs[0];
Map<String, dynamic> userData = user.data();
Navigator.pop(context);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Chat(
peerId: userData["id"],
peerAvatar: userData['photoUrl'],
)));
print(user.data()['nickname'].toString());
} else {
showSnackPlz(context, username);
Navigator.pop(context);
}
} else {
showSnackPlzWithMessage(context, 'Empty Username');
Navigator.pop(context);
}
},
),
),
),
),
],
),
),
),
);
}
showSnackPlz(BuildContext context, String username) {
final SnackBar snackMe = SnackBar(
content: new RichText(
text: new TextSpan(
style: new TextStyle(
fontSize: 14.0,
),
children: <TextSpan>[
new TextSpan(
text: 'User with email ',
),
new TextSpan(
text: username,
style: new TextStyle(fontWeight: FontWeight.bold),
),
new TextSpan(
text: '@gmail.com not in the database!',
),
],
),
),
);
_scaffKey.currentState.showSnackBar(snackMe);
}
showSnackPlzWithMessage(BuildContext context, String message) {
final SnackBar snackMe = SnackBar(
content: new Text(message),
);
_scaffKey.currentState.showSnackBar(snackMe);
}
getChats(String uid) {
return FirebaseFirestore.instance
.collection('messages')
.where('members', arrayContains: uid)
.snapshots();
}
getUserByUsername(String username) async {
return await _db.collection('users').doc(username).get();
}
getUserByEmail(String email) async {
return await _db.collection('users').where('email', isEqualTo: email).get();
}
Future getPosts() async {
var firestore = FirebaseFirestore.instance;
QuerySnapshot qn = await firestore.collection('users').get();
return qn.docs;
}
}
Can't find which code-row causes this.
Tried many changes but nothing helped.
Screenshot of the error
I've been facing this problem for whole day. Being rookie in flutterworld sometimes take bunch of time.