仅将日期限制为财政年度 - flutter

Question

I used DateTimeField to get data control. Here I want user to select date in financial year only: ex: Today date: 11 March 2020 so this case user can select from 1 April 2019 to till date.

I tried it but failed I able to restrict for last one year. like for above example user can select from 11 March 2019 to till date.

DateTime(DateTime.now().year - 1, DateTime.now().month,DateTime.now().day)

My onShowPicker looks like:

onShowPicker: (context, currentValue) {
          return showDatePicker(
            context: context,
            firstDate: DateTime(DateTime.now().year - 1, DateTime.now().month,
                DateTime.now().day),
            initialDate: currentValue ?? DateTime.now(),
            lastDate: DateTime.now(),
          );
        },

Any hint will be helpful.

Answer 1

How about this?

var now = DateTime.now();
var minus = 0;
if (now.month <= 3) {
  minus = 1;
}
var firstDate = DateTime(DateTime.now().year - minus, 4, 1);

and

firstDate: firstDate,