Adding multiple header in Recyclerview or Listview. randomly

Question

How can a add multiple header or dividers in RecyclerView or listview. randomly as highlighted in the image below:

Multiple heading in RecyclerView on the basic of date - Demo Image

Answer 1

Make a list in your constructor of Items:

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();
}

The actual Header item: (Make also a NormalItem class and a NormalViewHolder class)

public class HeaderItem extends Item {
    public HeaderItem() {
        super();
    }

    @Override
    public void bindToViewHolder(RecyclerView.ViewHolder viewholder) {
        HeaderItem holder = (HeaderItem) viewholder;
        holder.title.setText("Header");
    }

    @Override
    public int getItemType() {
        return Item.TYPE_HEADER;
    }
}

public class HeaderViewHolder extends RecyclerView.ViewHolder {
    TextView title;

    public HeaderViewHolder(View itemView) {
        super(itemView);
        title = itemView.findViewById(R.id.textview);
    }
}