Xamarin.Forms Android DatePicker/TimePicker 按钮侦听器

我需要知道用户是否点击了Cancel or Ok按钮 在一个日期/时间选择器 of an xamarin.Forms安卓应用程序。

我尝试向 Click 事件添加一个函数，但这从未被触发。

这是我的代码（类似于 TimePicker）：

using Android.Content;
using MyApp.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using MyApp.Models;
using Java.Util;

[assembly: ExportRenderer(typeof(DatePicker), typeof(DatePickerCustomRenderer))]

namespace MyApp.Droid {
    public class DatePickerCustomRenderer : DatePickerRenderer {

        public DatePickerCustomRenderer(Context context) : base(context) { } 

        protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e) {
            base.OnElementChanged(e);

            Locale locale = new Locale(Utente.FormatoPerDateTimePicker);
            Control.TextLocale = locale;

            Control.Click += Control_Click;
        }

        private void Control_Click(object sender, System.EventArgs e) {
            // This function is never called :(
            throw new System.NotImplementedException();
        }
    }
}

我怎样才能做到这一点？

使用以下 Android DatePicker 自定义渲染器，您可以完全控制“确定”和“取消”。

using Android.App;
using Android.Content;
using ???.Android.Renderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using DatePicker = Xamarin.Forms.DatePicker;

[assembly: ExportRenderer(typeof(DatePicker), typeof(FixedDatePickerRenderer))]    
namespace ???.Android.Renderers
{
    public class FixedDatePickerRenderer : Xamarin.Forms.Platform.Android.DatePickerRenderer
    {
        public FixedDatePickerRenderer(Context context) : base(context)
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.DatePicker> e)
        {
            base.OnElementChanged(e);

            //Disposing
            if (e.OldElement != null)
            {
                _element = null;
            }

            //Creating
            if (e.NewElement != null)
            {
                _element = e.NewElement;
            }
        }

        protected Xamarin.Forms.DatePicker _element;

        protected override DatePickerDialog CreateDatePickerDialog(int year, int month, int day)
        {
            var dialog = new DatePickerDialog(Context, (o, e) =>
            {
                _element.Date = e.Date;
                ((IElementController)_element).SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
            }, year, month, day);

            dialog.SetButton((int)DialogButtonType.Positive, Context.Resources.GetString(global::Android.Resource.String.Ok), OnOk);
            dialog.SetButton((int)DialogButtonType.Negative, Context.Resources.GetString(global::Android.Resource.String.Cancel), OnCancel);

            return dialog;
        }

        private void OnCancel(object sender, DialogClickEventArgs e)
        {
            _element.Unfocus();
            //((FixedDatePicker) _element)?.CallOnCancel();
        }
        private void OnOk(object sender, DialogClickEventArgs e)
        {
            //need to set date from native control manually now
            _element.Date = ((DatePickerDialog)sender).DatePicker.DateTime;
            _element.Unfocus();
            //((FixedDatePicker)_element)?.CallOnOk();
        }

    }

}


 

对于那些寻求完整解决方案以避免搜索 iOS 的人来说，已经包含一个开箱即用的选项：https://learn.microsoft.com/en-us/xamarin/xamarin-forms/platform/ios/datepicker-selection