java - 节项 : Get Section Name on Tap of Item

Question

当我点击该特定部分的任何项目时，尝试获取部分的名称。

我正在关注this教程，其中我的 UI 数据分为两部分:部分和项目

现在据我所知，我想查看部分的名称(一旦我点击任何项目)

举个例子，我有 5 个部分，每个部分本身包含 5 个项目，假设我已经点击了第 2 部分的第 4 个项目

那么我怎么知道，正如你所看到的，我正在获取点击项目的名称，但在点击时我还想获取部分的名称(我刚刚点击的项目)？

public class SingleItemRowHolder extends RecyclerView.ViewHolder {

        ....

        public SingleItemRowHolder(View view) {
            super(view);

            .....

            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    Toast.makeText(v.getContext(), tvTitle.getText(), Toast.LENGTH_SHORT).show();

                }
            });

        }

Answer 1

看到您提供的链接后，您只需将节名称传递并存储在 SectionListAdapter 中，如下所示:

public class SectionListDataAdapter extends RecyclerView.Adapter<SectionListDataAdapter.SingleItemRowHolder> {

    private ArrayList<SingleItemModel> itemsList;
    private Context mContext;
    private String mSectionName;

    public SectionListDataAdapter(Context context, String sectionName, ArrayList<SingleItemModel> itemsList) {
        mSectionName = sectionName;
        this.itemsList = itemsList;
        this.mContext = context;
    }

    @Override
    public SingleItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_single_card, null);
        SingleItemRowHolder mh = new SingleItemRowHolder(v);
        return mh;
    }

    @Override
    public void onBindViewHolder(SingleItemRowHolder holder, int i) {

        SingleItemModel singleItem = itemsList.get(i);

        holder.tvTitle.setText(singleItem.getName());


       /* Glide.with(mContext)
                .load(feedItem.getImageURL())
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .centerCrop()
                .error(R.drawable.bg)
                .into(feedListRowHolder.thumbView);*/
    }

    @Override
    public int getItemCount() {
        return (null != itemsList ? itemsList.size() : 0);
    }

    public class SingleItemRowHolder extends RecyclerView.ViewHolder {

        protected TextView tvTitle;

        protected ImageView itemImage;


        public SingleItemRowHolder(View view) {
            super(view);

            this.tvTitle = (TextView) view.findViewById(R.id.tvTitle);
            this.itemImage = (ImageView) view.findViewById(R.id.itemImage);


            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {


                    Toast.makeText(v.getContext(), mSectionName +" : "+ tvTitle.getText(), Toast.LENGTH_SHORT).show();

                }
            });


        }

    }

}

现在，在您的RecyclerViewDataAdapter中，只需更改onBindViewHolder内初始化SectionListDataAdapter的一行，如下所示:

public class RecyclerViewDataAdapter extends RecyclerView.Adapter<RecyclerViewDataAdapter.ItemRowHolder> {

    private ArrayList<SectionDataModel> dataList;
    private Context mContext;

    public RecyclerViewDataAdapter(Context context, ArrayList<SectionDataModel> dataList) {
        this.dataList = dataList;
        this.mContext = context;
    }

    @Override
    public ItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, null);
        ItemRowHolder mh = new ItemRowHolder(v);
        return mh;
    }

    @Override
    public void onBindViewHolder(ItemRowHolder itemRowHolder, int i) {

        final String sectionName = dataList.get(i).getHeaderTitle();

        ArrayList singleSectionItems = dataList.get(i).getAllItemsInSection();

        itemRowHolder.itemTitle.setText(sectionName);

        SectionListDataAdapter itemListDataAdapter = new SectionListDataAdapter(mContext, sectionName, singleSectionItems);

        itemRowHolder.recycler_view_list.setHasFixedSize(true);
        itemRowHolder.recycler_view_list.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
        itemRowHolder.recycler_view_list.setAdapter(itemListDataAdapter);


        itemRowHolder.btnMore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                Toast.makeText(v.getContext(), "click event on more, "+sectionName , Toast.LENGTH_SHORT).show();



            }
        });


       /* Glide.with(mContext)
                .load(feedItem.getImageURL())
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .centerCrop()
                .error(R.drawable.bg)
                .into(feedListRowHolder.thumbView);*/
    }

    @Override
    public int getItemCount() {
        return (null != dataList ? dataList.size() : 0);
    }

    public class ItemRowHolder extends RecyclerView.ViewHolder {

        protected TextView itemTitle;

        protected RecyclerView recycler_view_list;

        protected Button btnMore;



        public ItemRowHolder(View view) {
            super(view);

            this.itemTitle = (TextView) view.findViewById(R.id.itemTitle);
            this.recycler_view_list = (RecyclerView) view.findViewById(R.id.recycler_view_list);
            this.btnMore= (Button) view.findViewById(R.id.btnMore);


        }

    }

}