在recyclelerView中添加行到section

Question

我在RecyclerView内部有一个RecyclerView我添加了两个部分Favorites，All Contacts。要添加我使用的部分SimpleSectionedRecyclerViewAdapter  现在我的部分行是硬编码的（行和部分的索引），我想通过选择行来向favorite部分添加行，因为没有关于我想要的内容，我没有＃＆＃ 39;知道从哪里开始或我必须做什么？

如果有人知道如何通过选择All Contacts部分（行的默认位置）添加行。那么请给我一些关于我必须做的事情的提示

我想要的是这样的：

按下按钮

添加到收藏夹

任何指导对我都有帮助，谢谢

Answer 1

您可以使用库SectionedRecyclerViewAdapter来实现它，而无需对标头/行索引进行硬编码。

首先创建一个Section类来对项目进行分组：

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);
    }
}

然后使用您的章节设置RecyclerView：

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

// Create your sections with the list of data
MySection favoritesSection = new MySection("Favorites", favoritesList);
MySection contactsSection = new MySection("Add Favorites", contactsList);

// Add your Sections to the adapter
sectionAdapter.addSection(favoritesSection);
sectionAdapter.addSection(contactsSection);

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

您可以找到如何收听按钮的示例here。

您还可以在部分中添加新行而无需重新计算索引，只需在Section类中创建这样的方法：

public void addRow(String item) {
    this.list.add(item);
}

然后：

favoritesSection.addRow("new item");
sectionAdapter.notifyDataSetChanged();