How to compare time in flutter?

Question

here I want to validate time. as per this image, when I choose the Shift Begin time and End Time then whenever I am choosing break time it will always between Shift begin time and Shift end time.

Here is the Image of output

Here is the code for the time picker

                       DateTimeField( 
                          decoration: InputDecoration(
                            contentPadding: const EdgeInsets.symmetric(
                                vertical: 15.0, horizontal: 10),
                            labelText: "Time",
                            filled: true,
                            fillColor: Colors.white,
                            border: OutlineInputBorder(
                              borderRadius: new BorderRadius.circular(6),
                            ),
                          ),
                          format: format,
                          onShowPicker: (context, currentValue) async {
                            final time = await showTimePicker(
                              context: context,
                              initialTime: TimeOfDay.fromDateTime(
                                currentValue ?? DateTime.now(),
                              ),
                            );
                            return DateTimeField.convert(time);
                          },
                        ),

https://stackoverflow.com/questions/54639993/dart-flutter-how-to-compare-two-timeofday-times — alter123, Nov 27 '19 at 05:29

score 3 · Accepted Answer · edited Nov 27 '19 at 11:09

3

  static var startShift = DateTime.now();   
  final endShift = DateTime.now().add(Duration(hours: 8));   
  static var startBreak = startShift.add(Duration(hours: 3));   
  final endBreak = startBreak.add(Duration(hours: 1));

if ((startBreak.isAfter(startShift) && startBreak.isBefore(endShift)) &&
    (endBreak.isAfter(startShift) && endBreak.isBefore(endShift))) {
  //--- Break is within a shift.
} else {
  //--- Invalid break;
}

edited Nov 27 '19 at 11:09

Rutvik Gumasana

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answered Nov 27 '19 at 06:11

Anand Kore

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interesting answer wait I'll try and then let you know – Rutvik Gumasana Nov 27 '19 at 06:28
Here I am selecting the time from DatetimeFormField so how can I define the time for that. because the user can select anything from time picker and shift is not may exact 8 hours it may also change. – Rutvik Gumasana Nov 27 '19 at 06:41
What kind of exception? can you share? – Anand Kore Nov 27 '19 at 08:56
it okay it just a static member problem – Rutvik Gumasana Nov 27 '19 at 10:30
@RutvikGumasana does this solve your problem?? If yes, please mark it as the correct answer. – Anand Kore Nov 27 '19 at 10:55
Yes buddy sure but before please check edit i have suggested. – Rutvik Gumasana Nov 27 '19 at 10:58
@RutvikGumasana Approved. – Anand Kore Nov 27 '19 at 11:10

How to compare time in flutter?

1 Answers1