Android（十二）：自定义控件

// 目录：scripts/ShowToast.cs
using System;
using Android.App;
using Android.Util;
using Android.Views;
using Android.Widget;
using Android.Content;

namespace android_by_csharp.scripts
{
    public class ShowToast : Button
    {
        public ShowToast(Context context, IAttributeSet attrs) : base(context, attrs) 
        {
        }
        
        public override bool OnTouchEvent(MotionEvent e)
        {
            switch (e.Action)
            {
                case MotionEventActions.Down:
                    Toast.MakeText(Application.Context, "自定义控件", ToastLength.Long)?.Show();
                    break;
                case MotionEventActions.Up:
                case MotionEventActions.Cancel:
                    break;
            }
            return base.OnTouchEvent(e);
        }
    }
}