android - RecyclerView 适配器仅在滚动时添加重复的 TEXTVIEW

Question

我有一个向 RecyclerView 添加数据的 RecyclerView 适配器，它工作正常，直到我上下滚动并看到重复的 TextView。

所以我的 RecyclerView 加载是这样的

问题出在您看到 tag0 的地方和 tag1 - 如果我向下滚动并返回，一组重复的 tag0和 tag1已添加 - 如以下屏幕截图所示

It keeps happening over and over again everytime I scroll

我的 RecyclerView Adapter 代码如下(精简版)

class VideoAdapter : RecyclerView.Adapter
    {       
        Context _context;
        private List<VideoDisplayModel> _AllLinks;

        public VideoAdapter(List<VideoDisplayModel> AllLinks)
        {
            _AllLinks = AllLinks;
        }


        public override int ItemCount
        {
            get
            {
                return _AllLinks.Count;
            }
        }

        public override long GetItemId(int position)
        {
            return position;
        }
        public override int GetItemViewType(int position)
        {
            return position;
        }

 public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            View listitem = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.VideoRecyclerRow, parent, false);
            TextView title = listitem.FindViewById<TextView>(Resource.Id.titleVideo);           
            ImageView image = listitem.FindViewById<ImageView>(Resource.Id.imageVideo); 
            LinearLayout tagsLayout = listitem.FindViewById<LinearLayout>(Resource.Id.tagsVideoLayout);

            VideoRecylerViewHolder view = new VideoRecylerViewHolder(listitem)
            {
                Title = title,              
                Thumb = image,                
                TagsLayout = tagsLayout
            };

            _context = parent.Context;
            return view;
        }


        public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            var viewHolder = holder as VideoRecylerViewHolder;
            var currentLink = _AllLinks[position];
            viewHolder.Title.Text = currentLink.Title;


            for(int i = 0; i < 2; i++)
            {
                TextView Txt = new TextView(_context);
                Txt.Text = "test"+i.ToString();
                Txt.SetBackgroundResource(Resource.Drawable.roundtext);
                Txt.SetPadding(30, 10, 30, 10);   
 Txt.SetTextColor(global::Android.Graphics.Color.ParseColor("#373944"));
                Txt.SetTextSize(Android.Util.ComplexUnitType.Dip, 12);
                viewHolder.TagsLayout.AddView(Txt);
            }

        }

我不明白，我做错了什么 - 有什么想法吗？

干杯

Answer 1

RecyclerView 回收相同的布局，因此如果您之前添加了一个 View ，它会添加另一个 View 。确保在添加 View 之前清除父 View :

viewHolder.TagsLayout.removeAllViews();  //THIS

for(int i = 0; i < 2; i++) {
  ...
  viewHolder.TagsLayout.AddView(Txt);
}