java - 根据字符串移动 Recyclerview 项目位置

Question

我有一个 Recyclerview，我想根据特定项目的字符串值对它们进行排序。例如，如果 RecyclerView 中的任何按钮包含字符串“Naked”，则该值将移至 Recyclerview 的顶部，所有其他包含“Naked”和任何其他文本的实例也会进一步移至此列表的上方。

{
    public CategoryGridAdapter(List<String> items, OnListItemClickListener<String> listener)
    {
        super(items, listener);
    }

    @NonNull @Override
    public BaseViewHolder<String> onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
    {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.item_grid_category, parent, false);
        return new CategoryGridViewHolder(view);
    }

    @Override
    public void onBindViewHolder(BaseViewHolder<? super String> holder, int position)
    {
        String item = getItem(position);
        holder.bind(item);
        holder.itemView.findViewById(R.id.button).setOnClickListener(v -> getListener().onItemClick(item, holder.itemView));


    }
}

Answer 1

使用构造函数传递 LayoutManager

class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
        private LinearLayoutManager manager;

        public Adapter(LinearLayoutManager manager)
        {
            this.manager=manager;
        }


    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
       if (holder.button.gettext().tostring().equals("Naked")
                        {manager.scrollToPosition(0);}
}