[BUG] date changes unintended

[devii21]

When changing the year, sometimes the month gets changed to a seemingly random month. Same with month/day.

To reproduce:

        DatePickerWidget(
            initialDate: DateTime.now(),
            firstDate: DateTime.now(),
            onChange: (value, _) {
              print(value.toString());
            }),

• select next month (Dec)
• select next year (2021)
  -> february gets selected

OR

• select next month (Dec)
• select first
• select current month (Nov)
  -> 9th gets selected

[kfiross]

Hi, I'll look for it

[shabeenabarde]

I am facing the same issue. But if i change my initial date from DateTime.now(). to lets say DateTime(2020), it works fine. But I do not want that because I do not want my users to be able to select back dates.

But when it is selected as DateTime.now(), and I select Dec 28th 2020, It Gives me the date of Dec 3rd, 2020...
But if I tap on the picker again, thats when it gets selected correctly. So on the first selection, it gives me a random number but on the second selection, it gives me the correct date.

Find my code below (The one that gives me incorrect date on first selection):

`
import 'package:flutter/material.dart';
import 'package:flutter_holo_date_picker/flutter_holo_date_picker.dart';
import 'package:intl/intl.dart';

class DateTesting extends StatefulWidget {
DateTesting({Key key}) : super(key: key);

@OverRide
_DateTestingState createState() => _DateTestingState();
}

class _DateTestingState extends State {
static DateTime startDate = DateTime.now();
String quoteStartDate =
DateFormat.yMMMd().format(startDate.add(Duration(days: 1))).toString();
String endPeriod = DateFormat.yMMMd()
.format(DateTime.now().add(Duration(days: 30)))
.toString();

@OverRide
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
"Date Testing",
),
),
body: ListView(
children: [
RaisedButton(
child: Text("$quoteStartDate"),
onPressed: () async {
var selectedFirstDate = await DatePicker.showSimpleDatePicker(
context,
initialDate: DateFormat.yMMMd().parse(quoteStartDate),
// firstDate: DateFormat.yMMMd().parse(quoteStartDate),
firstDate:
// startDate,
// DateTime(2020),
DateTime.now(),
lastDate: DateTime(2030),
dateFormat: "yyyy-MMMM-dd",
locale: DateTimePickerLocale.en_us,
looping: true,
);

            print("My date is picked $selectedFirstDate");

            setState(() {
              setState(() {
                quoteStartDate =
                    DateFormat.yMMMd().format(selectedFirstDate);

                print("My quoteStartDate is picked $quoteStartDate");

                endPeriod = DateFormat.yMMMd()
                    .format(selectedFirstDate.add(Duration(days: 30)))
                    .toString();
                // oneYear = selectedFirstDate.add(Duration(days: 29));
              });
            });
          },
        ),
        RaisedButton(
          child: Text("$endPeriod"),
          onPressed: () async {
            var selectedEndDate = await DatePicker.showSimpleDatePicker(
              context,
              initialDate: DateFormat.yMMMd().parse(endPeriod),
              firstDate: DateFormat.yMMMd()
                  .parse(endPeriod)
                  .subtract(Duration(days: 30)),
              lastDate: DateFormat.yMMMd()
                  .parse(quoteStartDate)
                  .add(Duration(days: 30)),
              dateFormat: "yyyy-MMMM-dd",
              locale: DateTimePickerLocale.en_us,
              looping: true,
            );

            setState(() {
              endPeriod =
                  DateFormat.yMMMd().format(selectedEndDate).toString();

            });

            print("My date is picked $selectedEndDate");
          },
        ),
      ],
    ));

}
}`

[kfiross]

If I got it right, when you change the month - the day is selected "randomly"?

[kfiross]

@devii21 @shabeenabarde I uploaded a dev version, please check it and tell if the bug is fixed

[shabeenabarde]

@kfiross I changed my channel to Dev, and the issue still persists. I don't know if i am going wrong somewhere.

This is my flutter doctor Summary:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel dev, 1.24.0-10.2.pre, on Mac OS X 10.15.4 19E287 darwin-x64, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 12.0.1)
[✓] Android Studio (version 3.4)
[✓] Android Studio (version 4.0)
[✓] VS Code (version 1.51.1)
[✓] Connected device (1 available)
! Error: Shabeena’s iPhone is not connected. Xcode will continue when Shabeena’s iPhone is connected. (code -13)

[kfiross]

@shabeenabarde I meant the bug should be fixed in 0.3.0-dev
I tested it on Flutter beta channel 1.22

[shabeenabarde]

@kfiross It works fine with ^0.3.0-dev.1

[kfiross]

@shabeenabarde thanks! Issue closed.

[shabeenabarde]

@kfiross

Kindly find the code below, I am facing a similar issue again:
`
import 'package:flutter/material.dart';
import 'package:flutter_holo_date_picker/flutter_holo_date_picker.dart';
import 'package:intl/intl.dart';

class DateTestingTwo extends StatefulWidget {
DateTestingTwo({Key key}) : super(key: key);

@OverRide
_DateTestingTwoState createState() => _DateTestingTwoState();
}

class _DateTestingTwoState extends State {
static DateTime startDate = DateTime.now();
String quoteStartDate = DateFormat.yMMMd().format(startDate);
String endPeriod = DateFormat.yMMMd()
.format(DateTime.now().add(Duration(days: 2)))
.toString();

@OverRide
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
"Date Testing 2",
),
),
body: ListView(
children: [
RaisedButton(
child: Text("$quoteStartDate"),
onPressed: () async {
try {
var selectedFirstDate = await DatePicker.showSimpleDatePicker(
context,
initialDate: DateFormat.yMMMd().parse(quoteStartDate),
firstDate: DateTime.now(),
lastDate: DateTime(2030),
dateFormat: "yyyy-MMMM-dd",
locale: DateTimePickerLocale.en_us,
looping: true,
);

              print("My date is picked $selectedFirstDate");

              setState(() {
                setState(() {
                  quoteStartDate =
                      DateFormat.yMMMd().format(selectedFirstDate);

                  print("My quoteStartDate is picked $quoteStartDate");
                });
              });
            } catch (e) {
              print("My error is $e");
            }
          },
        ),
        RaisedButton(
          child: Text("$endPeriod"),
          onPressed: () async {
            try {
              var selectedEndDate = await DatePicker.showSimpleDatePicker(
                context,
                initialDate: DateFormat.yMMMd().parse(endPeriod),
                firstDate: DateFormat.yMMMd()
                    .parse(quoteStartDate)
                    .subtract(Duration(days: 0)),
                lastDate: DateFormat.yMMMd()
                    .parse(quoteStartDate)
                    .add(Duration(days: 30)),
                dateFormat: "yyyy-MMMM-dd",
                locale: DateTimePickerLocale.en_us,
                looping: true,
              );

              setState(() {
                endPeriod =
                    DateFormat.yMMMd().format(selectedEndDate).toString();
              });

              print("My date is picked $selectedEndDate");
            } catch (e) {
              print("My error is $e");
            }
          },
        ),
      ],
    ));

}
}
`

Lets say my $quoteStartDate is 6th Dec 2020. So when i am choosing my $endPeriod, I want the firstDate of the $endPeriod to not go below the $quoteStartDate so I have set the firstDate for the $endPeriod to $quoteStartDate. So when i am choosing 6th Dec 2020 for $endPeriod, it automatically chooses 7th Dec 2020, I want it to be 6th Dec 2020 as selected. Why is that? I want the user to be able to select the $quoteStartDate and the $quoteEndDate as the same day.