问具有两个部分的RecyclerView适配器，基于数据集中的字段
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Stack Overflow用户

提问于 2016-06-17 11:13:33

回答 1查看 62关注 0票数 0

我有一个列表要传递给RecyclerView。WifiNetwork对象包含一个布尔值"inRange“。

在我的标题中，我想要这个结构：- RecyclerView : IN RANGE - items with boolean inRange == true - header: NOT IN RANGE - items with boolean inRange == false

我似乎找不到一种简单的方法来做这件事。

我的尝试：-在我的活动中直接加上“在范围内”和“不在范围内”的标签，并使用了2个RecyclerViews (这很丑陋)-- afollestad的分段回收视图(这对我来说有点不清楚)

这肯定是非常常见的。你们是怎么处理这事的？

android-recyclerview

回答 1

Stack Overflow用户

发布于 2016-07-07 12:57:20

您可以使用库SectionedRecyclerViewAdapter将数据分组为多个部分。

首先创建一个Section类：

class MySection extends StatelessSection {

    String title;
    List<String> list;

    public MySection(String title, List<String> list) {
        // call constructor with layout resources for this Section header, footer and items 
        super(R.layout.section_header, R.layout.section_item);

        this.title = title;
        this.list = list;
    }

    @Override
    public int getContentItemsTotal() {
        return list.size(); // number of items of this section
    }

    @Override
    public RecyclerView.ViewHolder getItemViewHolder(View view) {
        // return a custom instance of ViewHolder for the items of this section
        return new MyItemViewHolder(view);
    }

    @Override
    public void onBindItemViewHolder(RecyclerView.ViewHolder holder, int position) {
        MyItemViewHolder itemHolder = (MyItemViewHolder) holder;

        // bind your view here
        itemHolder.tvItem.setText(list.get(position));
    }

    @Override
    public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
        return new SimpleHeaderViewHolder(view);
    }

    @Override
    public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
        MyHeaderViewHolder headerHolder = (MyHeaderViewHolder) holder;

        // bind your header view here
        headerHolder.tvItem.setText(title);
    }
}

然后使用您的部分设置RecyclerView：

// Create an instance of SectionedRecyclerViewAdapter 
SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();

// Create your sections with the list of data for each year
MySection section1 = new MySection("IN RANGE", inRangeDataList);
MySection section2 = new MySection("NOT IN RANGE", notInRangeDataList);

// Add your Sections to the adapter
sectionAdapter.addSection(section1);
sectionAdapter.addSection(section2);

// Set up your RecyclerView with the SectionedRecyclerViewAdapter
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(sectionAdapter);