在圆形区域移动/动画TextView xamarin android

using Android.Animation;
using Android.Content;
using Android.Graphics;
using Android.Runtime;
using Android.Views;
using Android.Widget;

namespace YourNamespace
{
    public class CircularTextView : View
    {
        private TextView textView;
        private float centerX, centerY;
        private float radius;

        public CircularTextView(Context context) : base(context)
        {
            Init();
        }

        public CircularTextView(Context context, IAttributeSet attrs) : base(context, attrs)
        {
            Init();
        }

        public CircularTextView(Context context, IAttributeSet attrs, int defStyle) : base(context, attrs, defStyle)
        {
            Init();
        }

        private void Init()
        {
            // 初始化TextView
            textView = new TextView(Context);
            textView.Text = "Hello, World!";
            textView.Gravity = GravityFlags.Center;
            textView.SetTextColor(Color.Black);

            // 设置初始位置
            centerX = 300;
            centerY = 300;

            // 设置圆形区域的半径
            radius = 200;
        }

        protected override void OnDraw(Canvas canvas)
        {
            base.OnDraw(canvas);

            // 绘制圆形区域
            Paint paint = new Paint();
            paint.Color = Color.LightGray;
            canvas.DrawCircle(centerX, centerY, radius, paint);

            // 将TextView绘制在圆形区域内
            canvas.Save();
            canvas.Translate(centerX, centerY);
            textView.Draw(canvas);
            canvas.Restore();
        }

        public void StartAnimation()
        {
            // 创建属性动画，改变TextView的位置
            ValueAnimator animator = ValueAnimator.OfFloat(0, 360);
            animator.SetDuration(3000);
            animator.RepeatMode = ValueAnimatorRepeatMode.Reverse;
            animator.RepeatCount = ValueAnimator.Infinite;
            animator.AddUpdateListener(new CircularTextViewAnimatorUpdateListener());
            animator.Start();
        }

        private class CircularTextViewAnimatorUpdateListener : Java.Lang.Object, ValueAnimator.IAnimatorUpdateListener
        {
            public void OnAnimationUpdate(ValueAnimator animation)
            {
                // 更新TextView的位置
                float angle = (float)animation.AnimatedValue;
                float x = centerX + (float)Math.Cos(Math.ToRadians(angle)) * radius;
                float y = centerY + (float)Math.Sin(Math.ToRadians(angle)) * radius;
                textView.TranslationX = x;
                textView.TranslationY = y;
            }
        }
    }
}

CircularTextView circularTextView = new CircularTextView(this);
layout.AddView(circularTextView);
circularTextView.StartAnimation();