Xamarin Android中如何消除Adapter指定位置的空视图

你的问题核心是只设置了目标控件的可见性，未对不需要的控件设置隐藏，再加上Adapter的视图复用机制，导致旧视图状态残留，出现空占位。按以下方式修改代码即可解决：

1. 初始化控件后先统一设置所有控件为隐藏状态，避免复用残留
2. 根据id判断显示哪一组控件，同时绑定对应数据
3. 修正ViewHolder实例化的笔误（原代码里new Myadapter()应该是自定义的ViewHolder类）

修改后的完整代码：

view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.Myadapter, parent, false);

var desc = view.FindViewById<TextView>(Resource.Id.OrderedDesc);
var OrderedQty = view.FindViewById<TextView>(Resource.Id.OrderedQty);

var x = view.FindViewById<TextView>(Resource.Id.x);
var newOrderedDesc = view.FindViewById<TextView>(Resource.Id.newOrderedDesc);
var newQty = view.FindViewById<TextView>(Resource.Id.newitemQty);

// 先默认隐藏所有控件，消除复用残留
desc.Visibility = ViewStates.Gone;
OrderedQty.Visibility = ViewStates.Gone;
x.Visibility = ViewStates.Gone;
newOrderedDesc.Visibility = ViewStates.Gone;
newQty.Visibility = ViewStates.Gone;

var itemId = MyConvert.ToInt32(Getitem[position].id);
if (itemId == 19)
{
    // 显示新控件组并绑定数据
    x.Visibility = ViewStates.Visible;
    newOrderedDesc.Visibility = ViewStates.Visible;
    newQty.Visibility = ViewStates.Visible;
    
    newOrderedDesc.Text = Getitem[position].Description.Trim();
    newQty.Text = MyConvert.ToString(Getitem[position].Quantity).Trim();
}
else
{
    // 显示旧控件组并绑定数据
    desc.Visibility = ViewStates.Visible;
    OrderedQty.Visibility = ViewStates.Visible;
    
    desc.Text = Getitem[position].Description.Trim();
    OrderedQty.Text = MyConvert.ToString(Getitem[position].Quantity).Trim();
}

// 替换为你的实际ViewHolder类，原代码里的Myadapter是笔误
view.Tag = new MyViewHolder()
{
    desc = desc,
    OrderedQty = OrderedQty,
    newOrderedDesc = newOrderedDesc,
    newQty = newQty
};

注：使用ViewStates.Gone而非Invisible，因为前者会完全移除控件的布局占位，彻底避免空视图问题。

内容的提问来源于stack exchange，提问作者Christopher