当点击 recyclerview 行时，微调器选定的值返回到旧值

如何解决当点击 recyclerview 行时，微调器选定的值返回到旧值

我已经使用 xamarin.android 创建了一个 android 应用程序。该应用程序有一个包含微调器的回收视图。我想要的是当用户从微调器中选择一个项目时，我需要更改数据表中相应列和行的值，并且我需要将新值显示在微调器中的回收器视图中微调器所在的行中值被选中。问题是，无论何时选择一个值，当单击另一行时，都会显示微调器的旧值。我尝试了很多方法，例如以下链接中的代码：https://www.codeproject.com/articles/1033283/android-recycler-view-with-spinner-item-change-sel，但没有奏效。这是我的代码：

public class recyclerview_viewholder : RecyclerView.ViewHolder
        {
            public TextView rownbr,laborname;
            public EditText  overtime;
            public LinearLayout linearLayout;
            public Spinner days;


            public recyclerview_viewholder(View itemView,Action<int> listener)
              : base(itemView)
            {
                rownbr = itemView.FindViewById<TextView>(Resource.Id.rownbr);
                laborname = itemView.FindViewById<TextView>(Resource.Id.laborname);
                days = itemView.FindViewById<Spinner>(Resource.Id.days);
                overtime = itemView.FindViewById<EditText>(Resource.Id.overtime);
                linearLayout = itemView.FindViewById<LinearLayout>(Resource.Id.linearLayout);
                
                itemView.Click += (sender,e) => listener(base.LayoutPosition);

               
            }
 public class recyclerviewAdapter : RecyclerView.Adapter
        {
            // Event handler for item clicks:
            public event EventHandler<int> ItemClick;
           // public event EventHandler<AdapterView.ItemSelectedEventArgs> SpinnerItemSelectionChanged;

            public static DataTable summary_Requests = new DataTable();
            //Context context;
            public readonly new_schedule context;
            public static int selected_pos = -1;
            RecyclerView recyclerView;
            FloatingActionButton delete;
            public recyclerviewAdapter(new_schedule context,DataTable sum_req,RecyclerView recyclerView)
            {
                this.context = context;
                summary_Requests = sum_req;
                this.recyclerView = recyclerView;
                
            }
            public override RecyclerView.ViewHolder
                   OnCreateViewHolder(ViewGroup parent,int viewType)
            {
                View itemView = LayoutInflater.From(parent.Context).
                            Inflate(Resource.Layout.recycler_view_new_schedule_data,parent,false);


                recyclerview_viewholder vh = new recyclerview_viewholder(itemView,OnClick);
  vh.days.ItemSelected += (sender,e) =>
                {
                    Spinner spinner = (Spinner)sender;
                    int position = Convert.ToInt32(spinner.Tag);
                    summary_Requests.Rows[position]["dayNbr"] = Convert.ToDecimal(spinner.GetItemAtPosition(e.Position).ToString());
                  

                };


                vh.overtime.TextChanged += (sender,e) =>
                {
                    if (vh.overtime.Text != "")

                        try
                        {
                            int position = vh.LayoutPosition;
                            summary_Requests.Rows[position]["overtimeHours"] = Convert.ToInt32(vh.overtime.Text);
                            user.zero_val = "Not_exist";
                        }
                        catch (System.FormatException exp)
                        {
                            var icon = AppCompatResources.GetDrawable(context.Context,Resource.Drawable.error_ic);
                            icon.SetBounds(0,50,50);
                            vh.overtime.SetError("unit must be integer not decimal",icon);
                            user.zero_val = "exits";
                        }
                    else if (vh.overtime.Text == "")
                    {
                        var icon = AppCompatResources.GetDrawable(context.Context,Resource.Drawable.error_ic);
                        icon.SetBounds(0,50);
                        vh.overtime.SetError("value can not be empty",icon);
                        user.zero_val = "exits";
                    }

                };

                
                return vh;
            }

           

            public override void
                  OnBindViewHolder(RecyclerView.ViewHolder holder,int position)
            {
                recyclerview_viewholder vh = holder as recyclerview_viewholder;

                vh.rownbr.Text = summary_Requests.Rows[position]["rowNumber"].ToString();
                vh.laborname.Text = summary_Requests.Rows[position]["laborerName"].ToString();
                List<decimal> days_data = new List<decimal>();
                days_data.Add((decimal)0.5);
                days_data.Add((decimal)1);
                var adapter = new ArrayAdapter(this.context.Context,Android.Resource.Layout.SimpleSpinnerItem,days_data);
                adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
                vh.days.Tag = position;
                vh.days.Adapter = adapter;
                vh.days.SetSelection(1);
                vh.overtime.Text = summary_Requests.Rows[position]["overtimeHours"].ToString();

                if (selected_pos == position)
                    vh.ItemView.SetBackgroundColor(Color.ParseColor("#4fa5d5"));
                else
                    vh.ItemView.SetBackgroundColor(Color.LightGray);

                vh.ItemView.Click += (sender,e) =>
                {
                    int pos = vh.LayoutPosition;
                    user.del_pos = position;
                    
                    selected_pos = position;
                    NotifyDataSetChanged();
                    //fill global variables that need to be passed to detail fragment



                };



                //delete.Click += delegate
                //{
                //    vh.days.Enabled = false;

                //};
            }

           
            public DataTable get_dt_final()
            {
                DataTable final_dt = summary_Requests.copy();
                return final_dt;
            }

            public override long GetItemId(int position)
            {
                return position;
            }
            public void deleteItem(int index)
            {
                summary_Requests.Rows.RemoveAt(index);
                NotifyItemRemoved(index);
            }

            public override int ItemCount
            {
                get { return summary_Requests.Rows.Count; }
            }
            // Raise an event when the item-click takes place:
            void OnClick(int position)
            {
                if (ItemClick != null)
                    ItemClick(this,position);
                // user.req_pos = position;


            }
  }


    }
}

解决方法

我阅读了您提供的文章，更改微调器值时需要做两件事，首先需要将 vegeList's itemPosition 数量更改为 SpinnerItemSelectionChangedEvent，然后需要更新 {{ 1}} 在 TotalAmount

OnBindViewHolder