Question

我有一个MvxAdapter来查看MvxGridview中的图像。一切正常，直到我从ItemSource中删除一个项目。

我的视图不会升级（GetView（） - 在删除项目后不调用Method）。但为什么呢？

我在ItemsSource-Collection更改后调用了以下方法（不依赖于删除或添加项目）

RunOnUiThread(() => _adapter.NotifyDataSetChanged());

适配器创建如下：

// Create adapter
_adapter = new CustomAdapter(this, (IMvxAndroidBindingContext)BindingContext);

// Get gridview and set adapter
var gridview = FindViewById<MvxGridView>(Resource.Id.uploadprogress_imagegrid);
gridview.Adapter = _adapter;

这里是GetView（） - CustomAdapter的方法

protected override View GetView(int position, View convertView, ViewGroup parent, int templateId)
    {
        var data = GetRawItem(position) as PhoneImageItem;
        if (data == null) return null;

        ViewHolder holder;
        if (convertView == null)
        {
            convertView = _context.LayoutInflater.Inflate(templateId, parent, false);

            holder = new ViewHolder
            {
                Image = convertView.FindViewById<ImageView>(Resource.Id.phonepictures_item),
                Foreground = convertView.FindViewById<LinearLayout>(Resource.Id.phonepictures_foreground)
            };

            convertView.Tag = holder;
        }
        else
        {
            holder = (ViewHolder)convertView.Tag;
        }

        // Get bitmap from lru-cache
        var bmp = GetBitmapFromMemCache(data.Filepath);
        if (bmp == null)
        {
            LoadBitmap(data.Filepath, holder.Image);
        }
        else
        {
            // Set bitmap from cache
            holder.Image.SetImageBitmap(bmp);
        }

        // Set selected-layout
        holder.Foreground.Visibility = (data.IsSelected) ? ViewStates.Visible : ViewStates.Invisible;

        return convertView;
    }

我不知道该怎么做。谁能帮我？感谢

Mono Droid MvxAdapter NotifyDataSetChanged不工作

0 个答案: