java - 如何覆盖现有数据？

Question

我有两个recyclerview (rvone, rvtwo) 这个rvone是在rvone项被点击时显示数据列表的那个，数据的值减少这个项的一个例子

标题 Rp.1000 X 4 pcs 共 4000

好吧，如果它被点击它必须是标题 Rp.1000 X 3 pcs 总共 3000 不是只减少了一个吗，那一个移动到 rvtwo 意味着它变成了这样

标题 Rp.1000 X 1 pcs 共 1000

好吧，该功能已经在运行，但是每次单击它时，即使新添加对现有的也不是新的

这是一个示例标题 Rp.1000 X 4 pcs 共 4000 // 这是点击减少，缺少显示在 rvtwo

// 表示像这个标题 Rp.1000 X 1 pcs 共 1000

和 rvone 成为标题 Rp.1000 X 3 pcs 共 3000

当我再次点击时，它变成了这样的 rvone：title Rp.1000 X 2 pcs 2000 total

rvtwo：标题 Rp.1000 X 1 pcs 共 1000

标题 Rp.1000 X 1 pcs 共 1000

相反，它变成了两个项目，而不是在注释之前覆盖它 ：我只是添加了构造函数和 bindViewHolder 的代码

这是我的 rvone_adapter 函数 onclick 将数据发送到 rvtwo

public class OrderAdapter extends RecyclerView.Adapter<OrderAdapter.OrderViewHolder> {

    List<OrderModel> orderModels;
    public List<OrderCatchModel> orderCatchModels = new ArrayList<>();
    List<OrderDetailModel> orderDetailModels;
    Context context;
    OrderCatchAdapter orderCatchAdapter;

    OrderActivity orderActivity;

    public OrderAdapter(Context context, List<OrderModel> orderModels,List<OrderDetailModel> orderDetailModels){
        this.context = context;
        this.orderModels = orderModels;
        this.orderDetailModels = orderDetailModels;
    }
 @Override
    public void onBindViewHolder(@NonNull final OrderViewHolder holder, final int position) {
        final OrderModel orderModel = orderModels.get(0);

        final Long id = orderModel.getOrderDetailModels().get(position).getId();
        final String itemName = orderModel.getOrderDetailModels().get(position).getItem();
        final long price = orderModel.getOrderDetailModels().get(position).getPrice();
        final long quantity = orderModel.getOrderDetailModels().get(position).getQuantity();
        //final long amount = orderModel.getOrderDetailModels().get(position).getAmount();

        holder.mTxt_item.setText(orderModel.getOrderDetailModels().get(position).getItem());
        holder.mTxt_price.setText("Rp. " + orderModel.getOrderDetailModels().get(position).getPrice());
        holder.mTxt_quantity.setText(orderModel.getOrderDetailModels().get(position).getQuantity() + " Pcs");
        holder.mTxt_amount.setText("Rp. " + orderModel.getOrderDetailModels().get(position).getAmount());

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (quantity == 0){
                    orderModels.get(0).getOrderDetailModels().remove(position);
                    notifyItemRemoved(position);
                    notifyItemRangeChanged(position,orderModels.get(0).getOrderDetailModels().size());
                }else {

                    long q1 = quantity - 1;
                    long a1 = q1 * price;

                    orderModel.getOrderDetailModels().get(position).setQuantity(q1);
                    orderModel.getOrderDetailModels().get(position).setAmount(a1);
                    notifyDataSetChanged();


                    OrderCatchModel orderCatchModel = new OrderCatchModel();
                    orderCatchModel.setId(id);
                    orderCatchModel.setItem(itemName);
                    orderCatchModel.setPrice(price);
                    orderCatchModel.setQuantity(quantity - q1);
                    orderCatchModel.setAmount((quantity - q1) * price);

                    orderCatchModels.add(orderCatchModel);


                    if (context instanceof OrderActivity) {
                        ((OrderActivity)context).addItemToRvTwo(orderCatchModels, orderModel.getOrderDetailModels(), orderModels);
                    }


                }


            }
        });
    }

这是我的 rvtwo_adapter 函数 onclick 以将数据从 rvtwo 发送回 rvone

public OrderCatchAdapter(Context context, List<OrderCatchModel> orderCatchModel, List<OrderDetailModel> orderDetailModels, List<OrderModel> orderModels){
        this.context = context;
        this.orderDetailModels = orderDetailModels;
        this.orderCatchModels = orderCatchModel;
        this.orderModels = orderModels;
    }
@Override
    public void onBindViewHolder(@NonNull OrderCatchViewHolder holder, final int position) {
        final OrderCatchModel orderCatchModel = orderCatchModels.get(position);

        final Long id = orderCatchModel.getId();
        final String itemName = orderCatchModel.getItem();
        final long price = orderCatchModel.getPrice();
        final long quantity = orderCatchModel.getQuantity();

        holder.mTxt_item.setText(orderCatchModel.getItem());
        holder.mTxt_price.setText("Rp. " + orderCatchModel.getPrice());
        holder.mTxt_quantity.setText(orderCatchModel.getQuantity() + " Pcs");
        holder.mTxt_amount.setText("Rp. " + orderCatchModel.getAmount());

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (quantity <= 0){
                    orderCatchModels.remove(position);
                    notifyItemRemoved(position);
                    notifyItemRangeChanged(position,orderCatchModels.size());
                    notifyDataSetChanged();
                }else {
                    long q1 = quantity - 1;
                    long a1 = q1 * price;

                    orderCatchModel.setQuantity(q1);
                    orderCatchModel.setAmount(a1);
                    notifyDataSetChanged();

//                    Long idItem = orderModels.get(0).getOrderDetailModels().get(position).getId();

                    OrderDetailModel orderDetailModel = new OrderDetailModel();
                    orderDetailModel.setId(id);
                    orderDetailModel.setItem(itemName);
                    orderDetailModel.setPrice(price);
                    orderDetailModel.setQuantity(quantity - q1);
                    orderDetailModel.setAmount((quantity - q1) * price);

                    orderDetailModels.add(orderDetailModel);


                    if (context instanceof OrderActivity) {
                        ((OrderActivity)context).addDataToRvOne(orderModels, orderDetailModels);
                    }
                }

            }
        });

    }

这是我的活动

public void addDataToRvOne(List<OrderModel> orderModels, List<OrderDetailModel> orderDetailModels) {
        orderAdapter = new OrderAdapter(this, orderModels,orderDetailModels);
        LinearLayoutManager linearLayoutManagerRvOne = new LinearLayoutManager(this);

        rv_one.setLayoutManager(linearLayoutManagerRvOne);
        rv_one.setAdapter(orderAdapter);

        orderAdapter.notifyItemInserted(itemPosition);
        itemPosition += 1;
    }


    public void addItemToRvTwo(List<OrderCatchModel> orderCatchModels, List<OrderDetailModel> orderDetailModels, List<OrderModel> orderModels) {
        orderCatchAdapter = new OrderCatchAdapter(this, orderCatchModels,orderDetailModels, orderModels);
        LinearLayoutManager linearLayoutManagerRvTwo = new LinearLayoutManager(this);

        rv_two.setLayoutManager(linearLayoutManagerRvTwo);
        rv_two.setAdapter(orderCatchAdapter);


        orderCatchAdapter.notifyItemInserted(itemPosition);
        itemPosition += 1;

    }

这是抛出项目 rv_one 的模型

public class OrderDetailModel implements Serializable {
    private Long id;
    private String item;
    private long price;
    private long quantity;
    private long amount;

    public OrderDetailModel(
            Long id,
            String item,
            long price,
            long quantity
    ) {
        this.id = id;
        this.item = item;
        this.price = price;
        this.quantity = quantity;
        this.amount = price * quantity;
    }

    public OrderDetailModel() {

    }

这个模型 rv_two 捕获项目 rv_one

public class OrderCatchModel implements Serializable {

    private Long id;
    private String item;
    private long price;
    private long quantity;
    private long amount;

    public OrderCatchModel(Long id, String item, long price, long quantity, long amount) {
        this.id = id;
        this.item = item;
        this.price = price;
        this.quantity = quantity;
        this.amount = amount;
    }

    public OrderCatchModel() {
    }

这是虚拟数据

@SuppressLint("SimpleDateFormat")
public class MockData {
    public static List<OrderModel> ORDER_MODELS;

    static {
        ORDER_MODELS = new ArrayList<>();

        try {
            order(
                    1L,
                    "#00000001-001",
                    new SimpleDateFormat("dd-MM-yyyy HH:mm").parse("21-08-2019 09:47"),
                    null,
                    "MJ002",
                    "Sugiyono",
                    Arrays.asList(
                            new OrderDetailModel(
                                    1L,
                                    "Nasi Goreng",
                                    10000,
                                    2
                            ),
                            new OrderDetailModel(
                                    2L,
                                    "Bubur Ayam",
                                    9000,
                                    4
                            ),
                            new OrderDetailModel(
                                    3L,
                                    "Bubur Kacang",
                                    5000,
                                    5
                            ),
                            new OrderDetailModel(
                                    4L,
                                    "Jus Alpukat",
                                    8000,
                                    6
                            ),
                            new OrderDetailModel(
                                    5L,
                                    "Jus Durian",
                                    15000,
                                    2
                            ),
                            new OrderDetailModel(
                                    6L,
                                    "Jus Apel",
                                    13000,
                                    3
                            )
                    )
            );
        } catch (Exception ex) {
            Log.wtf(MockData.class.getSimpleName(), ex);
        }
    }

    @SuppressWarnings("SameParameterValue")
    private static void order(
            Long id,
            String number,
            Date date,
            String customer,
            String table,
            String staff,
            List<OrderDetailModel> orderDetailModels
    ) {
        OrderModel orderModel = new OrderModel();

        orderModel.setId(id);
        orderModel.setNumber(number);
        orderModel.setDate(date);
        orderModel.setCustomer(customer);
        orderModel.setTable(table);
        orderModel.setStaff(staff);
        orderModel.getOrderDetailModels().addAll(orderDetailModels);

        ORDER_MODELS.add(orderModel);
    }
}

问我你是否想要另一个代码

标签： javaandroidandroid-recyclerview