Question

我想分享我在创建一个recycleView时遇到的这个问题，它有一个删除项目的按钮。以防有人在那里浪费了他整整一天的时间来试图解决这个问题。

每当我点击按钮时，它有时会删除两个项目（调用两次）

这是代码（简化）

public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            MyView myHolder = holder as MyView;
            int IndexPosition = (Cards.Count - 1) - position;
            myHolder.tvTitle.Text = Cards[IndexPosition].Title;
            myHolder.tvSubTitle.Text = Cards[IndexPosition].SubTitle;
            myHolder.tvTime.Text = Cards[IndexPosition].Time;

            myHolder.mMainView.Click += (o, e) =>
            {
                 //delete the item, console.write("something")
            };
        }

简单地说，＆＃34;某事＆＃34;写了两次..

Answer 1

首先：不要在OnBindViewHolder

中点击事件添加代表

INSTEAD 您必须在此方法中设置点击事件：

public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)

例如

public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
{
            View row = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.CardView_proto,parent,false);

            TextView Title = row.FindViewById<TextView>(Resource.Id.cardview_textView_main);
            Button buttonCheck = row.FindViewById<Button>(Resource.Id.cardview_button_check);

            MyView view = new MyView(row) { tvTitle = Title };
            buttonCheck.Click += (o,e) => 
            { 
                       **//your method here won't be called twice**
            };
            return view;
};

在RecyclerView中调用Click事件多次（xamarin android）

1 个答案: