private void OnDateClick()
        {
            var frag = DatePickerMedicine.NewInstance(delegate(DateTime time)
            {
                tvStartDate.Text = time.ToString("dd/MM/yyyy");
            });

            frag.Show(activity.SupportFragmentManager, DatePickerMedicine.TAG);
        }
        public static DatePickerMedicine NewInstance(Action <DateTime> onDateSelected)
        {
            var frag = new DatePickerMedicine {
                _dateSelectedHandler = onDateSelected
            };

            Log.Error("FRAGUL", frag.ToString());
            return(frag);
        }