Flutter methods

datetime_picker.dart

  datePicker(context, data(result)) async {
    DateTime currentDate = DateTime.now();
    DateTime? pickedDate = await showDatePicker(
      context: context,
      initialDate: currentDate,
      firstDate: DateTime(2015, 8),
      lastDate: DateTime(2101),
    );

    if (pickedDate != null) {
      TimeOfDay currentTime = TimeOfDay.now();
      TimeOfDay? pickedTime = await showTimePicker(
        context: context,
        initialTime: currentTime,
      );

      if (pickedTime != null) {
        DateTime selectedDateTime = DateTime(
          pickedDate.year,
          pickedDate.month,
          pickedDate.day,
          pickedTime.hour,
          pickedTime.minute,
        );
        clog(selectedDateTime.toString());
        String formattedString =
            DateFormat('yyyy-MM-dd HH:mm:ss').format(selectedDateTime);
        data(formattedString);
      }
    }
  }

//usage:
await datePicker(context,(result) {
print(result);
})

//// 2023-12-06 00:00:00