Rifat Hasan Priyo
Reputation: 1
FlutterError (Looking up a deactivated widget's ancestor is unsafe
I am trying to create a real time chat app with flutter. I don't understand why it is giving this error even if everything is correct.The error is coming on line 186. i get the following error:
"Exception has occurred. FlutterError (Looking up a deactivated widget's ancestor is unsafe. At this point the state of the widget's element tree is no longer stable. To safely refer to a widget's ancestor in its dispose() method, save a reference to the ancestor by calling dependOnInheritedWidgetOfExactType() in the widget's didChangeDependencies() method.)"
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_application_1/chatpage.dart';
import 'package:flutter_application_1/database_chatapp/database.dart';
import 'package:flutter_application_1/database_chatapp/shared_orefer.dart';
class Home extends StatefulWidget {
const Home({super.key});
@override
State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
bool search = false;
final TextEditingController _searchController = new TextEditingController();
var resultList = [];
@override
void initState() {
_searchController.addListener(_onSearchChanged);
ontheload();
super.initState();
}
_onSearchChanged() {
print(_searchController.text);
showSearchResult();
}
List allResults = [];
getClientStream() async {
var data = await FirebaseFirestore.instance
.collection("users")
.orderBy("Name")
.get();
setState(() {
allResults = data.docs;
});
showSearchResult();
}
@override
void dispose() {
_searchController.removeListener(_onSearchChanged);
_searchController.dispose();
super.dispose();
}
@override
void didChangeDependencies() {
getClientStream();
super.didChangeDependencies();
}
showSearchResult() {
var ShowResult = [];
if (_searchController.text != "") {
for (var clinetshot in allResults) {
var name = clinetshot['Name'].toString().toLowerCase();
if (name.contains(_searchController.text.toLowerCase())) {
ShowResult.add(clinetshot);
}
}
}
setState(() {
resultList = ShowResult;
});
}
String? myname, myusername, mymail;
getthesharepre() async {
myname = await SharePreferenceHelper().getUserDisplayName();
myusername = await SharePreferenceHelper().getUserMail();
mymail = await SharePreferenceHelper().getUserMail();
setState(() {});
}
ontheload() async {
await getthesharepre();
setState(() {});
}
getchatroomIdByUsername(String a, String b) {
if (a.substring(0, 1).codeUnitAt(0) > b.substring(0, 1).codeUnitAt(0)) {
return "$b>$a";
} else {
return "$a>$b";
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: true,
backgroundColor: Color.fromARGB(255, 66, 25, 90),
body: Container(
decoration: BoxDecoration(),
child: Column(
children: [
Padding(
padding:
EdgeInsets.only(left: 20, right: 20, top: 40, bottom: 20),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
search
? Expanded(
child: TextField(
controller: _searchController,
decoration: InputDecoration(
border: InputBorder.none,
hintText: "Search Here",
hintStyle: TextStyle(color: Colors.white70),
),
style: TextStyle(color: Colors.white),
),
)
: Text(
"Chat APP",
style: TextStyle(fontSize: 22, color: Colors.white),
),
GestureDetector(
onTap: () {
setState(() {
search = !search;
_searchController.clear();
});
},
child: Container(
padding: EdgeInsets.all(6),
decoration: BoxDecoration(
color: Color.fromARGB(255, 33, 4, 49),
borderRadius: BorderRadius.circular(20)),
child: search
? Icon(
Icons.close,
color: Color.fromARGB(199, 230, 227, 227),
)
: Icon(
Icons.search,
color: Color.fromARGB(199, 230, 227, 227),
),
),
),
],
),
),
Expanded(
child: Container(
padding: search
? EdgeInsets.symmetric(vertical: 5, horizontal: 5)
: EdgeInsets.symmetric(vertical: 30, horizontal: 20),
height: search
? MediaQuery.sizeOf(context).height / 1.16
: MediaQuery.sizeOf(context).height / 1.15,
width: MediaQuery.sizeOf(context).width,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(20),
topRight: Radius.circular(20))),
child: search
? ListView.builder(
itemCount: resultList.length,
itemBuilder: (context, Index) {
return GestureDetector(
onTap: () async {
search = false;
setState(() {});
var chatroomId = getchatroomIdByUsername(
myusername!, resultList[Index]['UserName']);
Map<String, dynamic> chatroomInfoMap = {
"users": [
myusername,
resultList[Index]['UserName']
],
};
await DataBaseMethod()
.createChatRoom(chatroomId, chatroomInfoMap);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ChatPage(
name: resultList[Index]["Name"],
username: resultList[Index]["UserName"],
mail: resultList[Index]["Email"])));
},
child: ListTile(
title: Text(resultList[Index]['Name']),
subtitle: Text(resultList[Index]['Email']),
),
);
})
: Column(
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
ClipRRect(
borderRadius: BorderRadius.circular(70),
child: Image.asset(
"images/rifathasan.jpg",
height: 70,
width: 70,
fit: BoxFit.cover,
),
),
SizedBox(
width: 12,
),
Padding(
padding: const EdgeInsets.only(top: 7),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
"Sumi Akter",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold),
),
SizedBox(
height: 2,
),
Text(
"Hi,What are you doing?",
style: TextStyle(
fontSize: 16,
//fontWeight: FontWeight.w300,
color: Colors.black45),
),
],
),
),
Spacer(),
Text(
"04:18 PM",
style: TextStyle(
fontSize: 14,
//fontWeight: FontWeight.w300,
color: Colors.black45),
),
],
),
SizedBox(
height: 30,
),
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
ClipRRect(
borderRadius: BorderRadius.circular(70),
child: Image.asset(
"images/rifathasan.jpg",
height: 70,
width: 70,
fit: BoxFit.cover,
),
),
SizedBox(
width: 12,
),
Padding(
padding: const EdgeInsets.only(top: 7),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
"Rifat Hasan Priyo",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold),
),
SizedBox(
height: 2,
),
Text(
"Do you know what....",
style: TextStyle(
fontSize: 16,
//fontWeight: FontWeight.w300,
color: Colors.black45),
),
],
),
),
Spacer(),
Text(
"07:23 PM",
style: TextStyle(
fontSize: 14,
//fontWeight: FontWeight.w300,
color: Colors.black45),
),
],
),
],
),
),
),
],
),
),
);
}
}
i trying do when click Profile then create a chatroom
Upvotes: -1
Views: 33
Answers (1)
Urvashi kharecha
Reputation: 869
Try this
ListView.builder(
itemCount: resultList.length,
itemBuilder: (_, Index) {
return GestureDetector(
onTap: () async {
search = false;
setState(() {});
var chatroomId = getchatroomIdByUsername(
myusername!, resultList[Index]['UserName']);
Map<String, dynamic> chatroomInfoMap = {
"users": [
myusername,
resultList[Index]['UserName']
],
};
await DataBaseMethod()
.createChatRoom(chatroomId, chatroomInfoMap);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ChatPage(
name: resultList[Index]["Name"],
username: resultList[Index]["UserName"],
mail: resultList[Index]["Email"])));
},
child: ListTile(
title: Text(resultList[Index]['Name']),
subtitle: Text(resultList[Index]['Email']),
),
);
})
Upvotes: 0