c# - Xamarin Android ListView - 删除按钮多次触发

Question

为我需要能够从中删除的 ListView 设置客户适配器。 GetView 看起来像这样，包括我的 View 持有者的代码

public override View GetView(int position, View convertView, ViewGroup parent)
    {
        var row = convertView;
        IngredientHolder holder = null;

        if (row == null)
        {
            row = _context.LayoutInflater.Inflate(Resource.Layout.EditableIngredientListViewItem, null);
            holder = new IngredientHolder
            {
                IngredientName = row.FindViewById<EditText>(Resource.Id.editableIngredientNameTextView),
                Measurement = row.FindViewById<EditText>(Resource.Id.measurement),
                DeleteButton = row.FindViewById<ImageButton>(Resource.Id.delete_ingredient)
            };

            row.Tag = holder;
        }
        else
        {
            holder = row.Tag as IngredientHolder;
        }

        var ingredient = IngredientList[position];
        holder.Measurement.Text = ingredient.Measurement;
        holder.IngredientName.Text = ingredient.Name;
        holder.DeleteButton.Click += (sender, args) =>
        {
            IngredientList.RemoveAt(position);
            NotifyDataSetChanged();
        };

        return row;
    }

    private class IngredientHolder : Java.Lang.Object
    {
        public TextView IngredientName { get; set; }
        public TextView Measurement { get; set; }
        public ImageButton DeleteButton { get; set; }
    }

但问题是，当我单击删除按钮时，它会在不同的位置触发多次，最终到达我从列表中删除项目并且位置值超出范围的位置，我得到一个异常.

从 ListView 中删除和删除项目的正确方法是什么？

Answer 1

将代码替换为下面的代码，这样就不会调用很多次。

if (! holder.DeleteButton.HasOnClickListeners)
{
 holder.DeleteButton.Click += (sender, args) =>
        {
            IngredientList.RemoveAt(holder.AdapterPosition);
            NotifyDataSetChanged();
        };

}