listview - 在 Recyclerview 或 Listview 中添加多个标题。随机地

Question

如何在 RecyclerView 或 listview 中添加多个标题或分隔线。随机如下图突出显示:

RecyclerView 中基于日期的多个标题 - 演示图片

Answer 1

您可以使用库 SectionedRecyclerViewAdapter 来实现它。它有“部分”的概念，每个部分可以有自己的标题。

在我看来，您需要按“日期”对通话进行分组。所以你可以像这样创建你的Section类:

class MySection extends StatelessSection {

    String date;
    List<Call> callList;

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

        this.date = date;
        this.callList = callList;
    }

    @Override
    public int getContentItemsTotal() {
        return callList.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(callList.get(position).getContactName());
    }

    @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(date);
    }
}

然后用您的部分设置 RecyclerView:

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

MySection mySection1 = new MySection("27 Mar, 2016", callList1);
MySection mySection2 = new MySection("28 Mar, 2016", callList2);

// Add your Sections
sectionAdapter.addSection(mySection1);
sectionAdapter.addSection(mySection2);

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