Android 二级购物车计算总价

 

 二级商品适配器

        myViewHolder.checkBox.setChecked(list.get(i).isChildCheck());
        myViewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                if (childLisenter != null) {

//                    先改变自身状态
                    list.get(i).setChildCheck(isChecked);
                    childLisenter.onChild();
                }
            }
        });

 

二级商家调用适配器 

    public void setCheckChild(boolean checked) {
        //    商家适配器的调用方法
        for (int i = 0; i < list.size(); i++) {

            list.get(i).setChildCheck(checked);
        }
//        刷新
        notifyDataSetChanged();
    }

二级商品接口回调  

 public interface onChildLisenter {

        void onChild();
    }

    public onChildLisenter childLisenter;

    public void setChildLisenter(onChildLisenter onChildLisenter) {
        this.childLisenter = onChildLisenter;
    }

 

一级商家适配器 

    @Override
    public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, final int i) {

        myViewHolder.title.setText(data.get(i).getSellerName());

        myViewHolder.rlv2.setLayoutManager(new LinearLayoutManager(context));
        final List list = data.get(i).getList();

        final ShopChildAdapter shopChildAdapter = new ShopChildAdapter(context, list);
        myViewHolder.rlv2.setAdapter(shopChildAdapter);


//        选
        myViewHolder.checkBox.setChecked(data.get(i).isParentCheck());
//        二级商品适配器接口监听
        shopChildAdapter.setChildLisenter(new ShopChildAdapter.onChildLisenter() {
            @Override
            public void onChild() {

//                商品收到监听回主页面
                if (parentLisenter != null) {
                    parentLisenter.onParent(data);
                }
                boolean isChecked = true;
//                遍历商品状态
                for (int j = 0; j < list.size(); j++) {
                    boolean childCheck = list.get(j).isChildCheck();
                    if (!childCheck) {
                        isChecked = false;
                        break;
                    }
                }
//                通过商品状态改变商家状态
                myViewHolder.checkBox.setChecked(isChecked);
                data.get(i).setParentCheck(isChecked);
            }
        });

//        控制商品
        myViewHolder.checkBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                先改变商家状态
                myViewHolder.checkBox.setChecked(myViewHolder.checkBox.isChecked());
//                改变商品状态，调用商品适配器
                shopChildAdapter.setCheckChild(myViewHolder.checkBox.isChecked());
            }
        });
    }

 一级商家接口回调

//    接口回调
    public interface onParentLisenter {
        void onParent(List data);
    }

    public onParentLisenter parentLisenter;

    public void setParentLisenter(onParentLisenter onParentLisenter) {
        this.parentLisenter = onParentLisenter;
    }

 

 Activity或者Fragment

    @Override
    public void getDataView(JsonBean jsonBean) {

        final List data = jsonBean.getData();

//        Toast.makeText(getActivity(), "" + data.toString(), Toast.LENGTH_SHORT).show();

        final ShopParentAdapter shopParentAdapter = new ShopParentAdapter(getActivity(), data);
        rlv.setAdapter(shopParentAdapter);

//        商家控制全选全不选
        shopParentAdapter.setParentLisenter(new ShopParentAdapter.onParentLisenter() {
            @Override
            public void onParent(List data) {
                double priceSum = 0.0;
                int num1 = 0;
                int num2 = 0;
                for (int i = 0; i < data.size(); i++) {
                    List list = data.get(i).getList();
                    for (int j = 0; j < list.size(); j++) {
                        num1++;
                        boolean childCheck = list.get(j).isChildCheck();
                        if (childCheck) {
                            num2++;
                            priceSum += list.get(j).getPrice() * list.get(j).getNum();

                        }
                    }
                }
//                判断商品中数量和商品数量是否相等
                if (num1 == num2) {
                    shopcheckbox.setChecked(true);
                } else {
                    shopcheckbox.setChecked(false);
                }
                Callnum.setText("总价" + priceSum);
            }
        });

        /*
                全选/反选
         */
        shopcheckbox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double priceSum = 0.0;
                boolean isChecked = ((CheckBox) v).isChecked();
                if (isChecked) {
                    for (int i = 0; i < data.size(); i++) {
                        data.get(i).setParentCheck(true);
                        List list = data.get(i).getList();
                        for (int j = 0; j < list.size(); j++) {
                            list.get(j).setChildCheck(true);
                            //选中状态累计加总价
                            priceSum += list.get(j).getPrice() * list.get(j).getNum();

                        }
                    }
                } else {
                    for (int i = 0; i < data.size(); i++) {
                        data.get(i).setParentCheck(false);
                        List list = data.get(i).getList();
                        for (int j = 0; j < list.size(); j++) {
                            list.get(j).setChildCheck(false);
                        }
                    }
                }
                shopParentAdapter.notifyDataSetChanged();
                Callnum.setText("总价" + priceSum);
            }
        });
    }

https://github.com/mapengtao6/hh