How to only display the year in datepicker for Flutter?

Question

I want to the program to only ask the user for year input. But as you know, the date picker asks for a full date, including month and day. Is there a way to make it so that the user is only asked of the year?

Solution

Afaik, you can't use datePicker to only select the year. But you can do it by using dialog and a YearPicker widget.

Here a sample code to show dialog with a YearPicker (read the comment):

showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text("Select Year"),
          content: Container( // Need to use container to add size constraint.
            width: 300,
            height: 300,
            child: YearPicker(
              firstDate: DateTime(DateTime.now().year - 100, 1),
              lastDate: DateTime(DateTime.now().year + 100, 1),
              initialDate: DateTime.now(),
              // save the selected date to _selectedDate DateTime variable.
              // It's used to set the previous selected date when
              // re-showing the dialog.
              selectedDate: _selectedDate,
              onChanged: (DateTime dateTime) {
                // close the dialog when year is selected.
                Navigator.pop(context);

                // Do something with the dateTime selected.
                // Remember that you need to use dateTime.year to get the year
              },
            ),
          ),
        );
      },
    );