Flutter 2.2.2 dropdown error when selecting #85768
Labels
c: regression
It was better in the past than it is now
f: material design
flutter/packages/flutter/material repository.
found in release: 2.2
Found to occur in 2.2
found in release: 2.4
Found to occur in 2.4
framework
flutter/packages/flutter repository. See also f: labels.
has reproducible steps
The issue has been confirmed reproducible and is ready to work on
r: invalid
Issue is closed as not valid
Projects
Comments
|
Updated to new released version today, 2.2.3, and faced same issue |
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@erperejildo But I see the same behavior using the official example too (https://api.flutter.dev/flutter/material/DropdownButton-class.html), as below: flutter doctor -vCan you provide more details as when exactly do you see the value getting updated ? |
darshankawar
added
the
waiting for customer response
If you see same behaviour using the official example that's the error I was facing. It shouldn't update the value |
no-response
bot
removed
the
waiting for customer response
|
Hi @erperejildo, code sampleimport 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(primaryColor: Colors.blue),
darkTheme: ThemeData.dark(),
home: DropDownIssue(
title: 'DropdownForm Issue',
),
);
}
}
class DropDownIssue extends StatefulWidget {
DropDownIssue({Key? key, required this.title}) : super(key: key);
final String title;
@override
_DropDownIssueState createState() => _DropDownIssueState();
}
class _DropDownIssueState extends State<DropDownIssue> {
List<String> rentPeriods = [
'daily',
'weekly',
'bimonthly',
'monthly',
'2_months',
'quarterly',
'biannually',
'annually',
];
String? rentPeriod;
String? dropDownValue;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('DropDownButtonFormField updates state without setState'),
DropdownButtonFormField<String>(
value: rentPeriod,
items: rentPeriods.map((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
hint: Text(rentPeriod ?? 'daily'),
onChanged: (value) {
/// The state updates even without calling setState
// setState(() {
// rentPeriod = value;
// });
},
),
SizedBox(
height: 20,
),
Text('DropDownButton works as intended'),
DropdownButton<String>(
value: dropDownValue ?? 'One',
icon: const Icon(Icons.arrow_downward),
iconSize: 24,
elevation: 16,
style: const TextStyle(color: Colors.deepPurple),
underline: Container(
height: 2,
color: Colors.deepPurpleAccent,
),
onChanged: (String? newValue) {
/// commenting this wouldn't update the state of the dropdown
setState(() {
dropDownValue = newValue;
});
},
items: <String>['One', 'Two', 'Free', 'Four']
.map<DropdownMenuItem<String>>((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
)
],
),
);
}
}
Here's a dartapad demo of this issue. flutter doctor -vThank you for your contribution. |
maheshmnj
added
f: material design
|
This is working as intended, this was introduced in #37145
Looks like DropdownButtonFormField should be updated without |
|
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Steps to Reproduce
flutter create dropdown_issueIt's the default one when we created a new project but without comments or extra widgets, just the dropdown.
This is happening in my project after updating yesterday to 2.2.2 and I was not performing any change to this page/component, it was already working before.
It also happens with a new project.
Expected results:
The dropdown shouldn't update the value when we have something like this:
This is working fine in this other example: https://api.flutter.dev/flutter/material/DropdownButton-class.html
Actual results:
The value is getting updated
Logs
The text was updated successfully, but these errors were encountered: