Question

我有一个RecyclerView可以有X个项目，每个项目可能不同

所以我这样实现了它：

public override int GetItemViewType(int position) {
        QuestionType type = get_item(position).question_type;
        switch (type) {
            case QuestionType.caption:
                return VIEW_TYPE_CAPTION;
            case QuestionType.text:
                return VIEW_TYPE_TEXT;
            case QuestionType.check:
            case QuestionType.radio:
            case QuestionType.boolean:
            case QuestionType.list:
                return VIEW_TYPE_LIST;
            case QuestionType.date:
            case QuestionType.date_range:
                return VIEW_TYPE_DATE;
            case QuestionType.slider:
                return VIEW_TYPE_SLIDER;
            case QuestionType.range_slider:
                return VIEW_TYPE_RANGE;
            case QuestionType.poi:
                return VIEW_TYPE_POI;
            case QuestionType.grid:
                return VIEW_TYPE_GRID;
            default:
                return VIEW_TYPE_SECTION;
        }
    }

在我的oncreateviewholder方法中，它是这样的：

 public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.From(parent.Context);
        switch (viewType) {
            case VIEW_TYPE_CAPTION:
                return new CaptionViewHolder(inflater.Inflate(CaptionViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_TEXT:
                return new TextViewHolder(inflater.Inflate(TextViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_LIST:
                return new ListViewHolder(inflater.Inflate(ListViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_DATE:
                return new DateViewHolder(inflater.Inflate(DateViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_SLIDER:
                return new SliderViewHolder(inflater.Inflate(SliderViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_RANGE:
                return new RangeViewHolder(inflater.Inflate(RangeViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_POI:
                return new PoiViewHolder(inflater.Inflate(PoiViewHolder.Layout(_minified), parent, false), _provider);
            case VIEW_TYPE_GRID:
                return new GridViewHolder(inflater.Inflate(GridViewHolder.Layout(_minified), parent, false), _provider);
            default:
                return new SectionViewHolder(inflater.Inflate(SectionViewHolder.Layout(), parent, false));
        }

除非我创建ListViewHolder

，否则一切正常

列表视图持有者里面有一个recyclerview，其中包含一个项目列表，它初始化如下：

public ListViewHolder(View view, QuestionInteraction provider) : base(view, provider) {
        list = view.FindViewById<RecyclerView>(Resource.Id.question_answer_list);
        adapter = new ChoiceAdapter(ItemView.Context, value_changed);
        list.SetAdapter(adapter);
}

我在原始适配器的OnBindViewHolder中有一个更新方法，它在ListViewHolder中调用它：

 public override void update_data(QuestionVO q) {
        _initializing = true;
        choices = q.choices;
        values = q.selected_choices.ToDictionary(c => c, c => (object)true);

        if (q.choice_type == QuestionChoiceType.box && q.sub_type != QuestionSubType.integer) {
            int spanCount = ItemView.Resources.GetInteger(Resource.Integer.tiles_per_row);
            manager = new GridLayoutManager(ItemView.Context, spanCount);
        } else {
            manager = new LinearLayoutManager(ItemView.Context, q.horizontal ? LinearLayoutManager.Horizontal : LinearLayoutManager.Vertical, false);
        }
        manager.Orientation = (int)(q.horizontal ? Orientation.Horizontal : Orientation.Vertical);
        list.SetLayoutManager(manager);
        adapter.initialize(choices, q.horizontal, values, q.other_text, q.choice_type, q.sub_type, q.has_master_list);
    }

这个新的适配器（ChoiceAdapter）有一个自己的GetItemViewType方法

public override int GetItemViewType(int position) {
    if (_type == QuestionSubType.integer && _horizontal)
        return VIEW_TYPE_VALUE_HORIZONTAL;
    else if (_type == QuestionSubType.integer)
        return VIEW_TYPE_VALUE;
    else if (_horizontal)
        return VIEW_TYPE_BAR_HORIZONTAL;
    else if (_choice_type == QuestionChoiceType.box)
        return VIEW_TYPE_BOX;
    else if (_choice_type == QuestionChoiceType.bar)
        return VIEW_TYPE_BAR;
    else if (_choice_type == QuestionChoiceType.tile)
        return VIEW_TYPE_TILE;
    return -1;
}

我的问题是永远不会调用此方法，而OnBindViewHolder方法始终使用0作为viewType

调用

有人能告诉我我做错了什么吗？为什么不调用内部适配器的GetitemViewType方法？

从不调用适配器内的适配器内的GetItemViewType

0 个答案: