使用sort从arraylist动态添加标头到recyclerView

Question

我有json转换成模型

 Arraylist<model> data 

所以我想在json中按类型添加标题,所以如果在arraylist中有2个不同的类型,那么在recyclerView中将有2个标题,并且相关数据将作为列表.所以当前的例子我有2个typ2 - 1)名称2)值,所以我如何将2个标题添加到recyclerView,然后所有数据的类型作为名称

JSON

{
"info": [
    {
        "Id": 12,
        "Name": "hi",
        "Type": "name"
    },
    {
        "Id": 1,
        "Name": "hi1",
        "Type": "name"
    },
    {
        "Id": 13,
        "Name": "hi",
        "Type": "value"
    },
    {
        "Id": 15,
        "Name": "hi3",
        "Type": "name"
    },
    {
        "Id": 16,
        "Name": "hi",
        "Type": "value"
    },
    {
        "Id": 20,
        "Name": "hi5",
        "Type": "value"
    },
    {
        "Id": 24,
        "Name": "bye",
        "Type": "name"
    },
    {
        "Id": 12,
        "Name": "hi",
        "Type": "name"
    }
]

} 请查看图片细节来回

Answer 1

我假设您的布局设计已准备好作为您给定的图像链接.基本上你需要02个布局设计,其中一个用于标题,另一个用于每个项目的页脚.现在,您可以使用适配器动态添加标头,如下所示:

public class YourRecyclerViewAdapter extends RecyclerView.Adapter {

    private final int VIEW_ITEM_HEADER = 1;  // type: name/value
    private final int VIEW_ITEM_FOOTER = 0;

    private List<PojoModel> mData;
    private Context mContext;

    public YourRecyclerViewAdapter(Context context, List<PojoModel> data)     {
        this.mContext = context;
        this.mData = data;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder viewHolder;
        if (viewType == VIEW_ITEM_HEADER) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_header, parent, false);
            viewHolder = new HeaderHolder(view);
        } else {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_footer, parent, false);
            viewHolder = new FooterHolder(view);
        }
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        PojoModel item = mData.get(position);
        if (holder instanceof HeaderHolder) {
            HeaderHolder mHolder = (HeaderHolder)holder;
            // do your stuff
        } else {
            FooterHolder mHolder = (FooterHolder)holder;
            // do your stuff
        }
    }

    @Override
    public int getItemViewType(int position) {
        return mData.get(position) != null ? VIEW_ITEM_HEADER : VIEW_ITEM_FOOTER;
    }

    @Override
    public int getItemCount() {
        return mData.size();
    }

    public class HeaderHolder extends RecyclerView.ViewHolder {

        public HeaderHolder(View itemView) {
            super(itemView);
            // declare your header views
        }
    }

    public class FooterHolder extends RecyclerView.ViewHolder {

        public FooterHolder(View itemView) {
            super(itemView);
            // declare your footer views
        }
    }
}