在Recyclerview或Listview中添加多个标头。随机

如何在RecyclerView或listview中添加多个标题或分隔符。随机，如下图所示：

基于日期-演示图像的RecyclerView中的多标题

---

在项目的构造函数中列出：

private ArrayList<Item> list;

...
public AdapterMain() {
    list.add(new HeaderItem());
    list.add(new NormalItem());
    list.add(new HeaderItem());
    list.add(new NormalItem());
}


public Item getItem(int position) {
    return list.get(position);
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
    if (viewType == Item.TYPE_NORMAL) {
        View v = inflater.inflate(R.layout.adapter_normal, viewGroup, false);
        return new NormalViewHolder(v);
    } else if (viewType == Item.TYPE_HEADER) {
        View v = inflater.inflate(R.layout.adapter_header, viewGroup, false);
        return new HeaderViewHolder(v);
    }
    return null;
}


@Override
public int getItemViewType(int position) {
    return list.get(position).getItemType();
}

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

public abstract class Item {
    public static final int TYPE_HEADER = 0;
    public static final int TYPE_NORMAL = 1;
    public abstract void bindToViewHolder(RecyclerView.ViewHolder holder);
    public abstract int getItemType();
}

---

您可以使用库来实现它。它有“节”的概念，每个节可以有自己的标题

在我看来，你需要按“日期”对电话进行分组。因此，您可以像这样创建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);
    }
}

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);
    }
}

// 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);