电商项目之简单购物车_android 商品点击删除返回数量-优快云博客

本文链接：https://blog.youkuaiyun.com/wq857260622/article/details/78996779

该博客介绍了在一个电商项目中如何实现购物车功能，包括使用MVP架构、Fresco图片加载、OKhttp+Retrofit进行网络请求。内容涉及购物车数据添加、自定义加减按钮、数量限制、总价联动、单选反选全选、删除功能以及接口调用。同时，列出了项目所需的依赖库和权限，并给出了部分关键代码结构。

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效果图:

项目要求:

1.项目框架：MVP，图片加载用Fresco，网络请求用OKhttp+Retrofit实现（自己封装，加单例模式），

2.完成购物车数据添加（如果接口无数据，可用接口工具添加数据），

3.自定义view实现加减按钮，每次点击加减，item中的总数及总价要做出相应的改变。

4.当数量为1时，点击减号，数量不变，吐司提示用户最小数量为1。

5.底部总数及总价为所有item项中的总价及总数，每个item中数量价格的更改，底部总价总数要与之联动

6.实现单选反选全选功能，首次进入默认全选，item未选中时总数及总价不计入底部数据，改变选中状态时，底部总数及总价能做出正确修改

7.点击删除按钮，删除item，底部总数及总价能做出正确修改，接口数据删除。

接口如下:

添加购物车

接口地址：http://120.27.23.105/product/addCart

返回格式：json

请求方式：get/post

接口备注：添加购物车（删除sellerid字段）

请求参数说明：

名称类型必填说明

uid string 是用户id

pid string 是商品id

查询购物车

接口地址：http://120.27.23.105/product/getCarts

返回格式：json

请求方式：get/post

接口备注：查询购物车

请求参数说明：

名称类型必填说明

uid string 是用户id

更新购物车

接口地址：http://120.27.23.105/product/updateCarts?uid=71&sellerid=1&pid=1&selected=0&num=10

返回格式：json

请求方式：get/post

接口备注：更新购物车

请求参数说明：

名称类型必填说明

uid string 是用户id

sellerid string 是商户id

pid string 是商品id

num string 是商品数量

selected string 是是否选中

删除购物车

接口地址：http://120.27.23.105/product/deleteCart?uid=72&pid=1

返回格式：json

请求方式：get/post

接口备注：删除购物车

请求参数说明：

名称类型必填说明

uid string 是用户id

pid string 是商品id

本项目所需依赖:

   //retrofit
    compile 'com.squareup.retrofit2:retrofit:+'
    compile 'com.squareup.retrofit2:converter-gson:+'

    //Rxjava2
    compile 'io.reactivex.rxjava2:rxjava:+'
    compile 'io.reactivex.rxjava2:rxandroid:+'

//让retrofit支持Rxjava2
compile 'com.squareup.retrofit2:adapter-rxjava2:+'

    //butterknife
    compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

//fresco
compile 'com.facebook.fresco:fresco:+'

//支持gif

compile 'com.facebook.fresco:animated-gif:+'

//eventbus
compile 'org.greenrobot:eventbus:3.0.0'

本项目所需权限:

<uses-permission android:name="android.permission.INTERNET" />

本项目所需素材如下:

项目结构如下:

代码(由上到下):

adapter:

MessageEvent

package com.bwie.myapplication.adapter;

public class MessageEvent {
    private boolean checkd;

    public boolean isCheckd() {
        return checkd;
    }

    public void setCheckd(boolean checkd) {
        this.checkd = checkd;
    }
}

MyCarShowAdapter

package com.bwie.myapplication.adapter;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.net.Uri;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;


import com.bwie.myapplication.R;
import com.bwie.myapplication.bean.DeleteGoodsBean;
import com.bwie.myapplication.bean.ShoppingcarBean;
import com.bwie.myapplication.bean.UpdateGoodsBean;
import com.bwie.myapplication.presenter.DeleteGoodsPresenter;
import com.bwie.myapplication.presenter.UpdateGoodsPresenter;
import com.bwie.myapplication.view.IDeleteGoodsView;
import com.bwie.myapplication.view.IUpdateGoodsView;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.view.SimpleDraweeView;

import org.greenrobot.eventbus.EventBus;

import java.util.List;


public class MyCarShowAdapter extends BaseExpandableListAdapter implements IDeleteGoodsView, IUpdateGoodsView {
    private Context context;
    private List<ShoppingcarBean.DataBean> data;
    private List<List<ShoppingcarBean.DataBean.ListBean>> list;
    private DeleteGoodsPresenter deleteGoodsPresenter;
    private boolean isVisible;
    private SharedPreferences myself;
    private String uid;
    private UpdateGoodsPresenter updateGoodsPresenter;

    public MyCarShowAdapter(Context context, List<ShoppingcarBean.DataBean> data, List<List<ShoppingcarBean.DataBean.ListBean>> list) {
        this.context = context;
        this.data = data;
        this.list = list;
    }

    @Override
    public int getGroupCount() {
        return data.size();
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return list.get(groupPosition).size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return data.get(groupPosition);
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return list.get(groupPosition).get(childPosition);
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    //一级标题
    @Override
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = View.inflate(context, R.layout.group1, null);
            holder.textView = (TextView) convertView.findViewById(R.id.g_title);
            holder.che = (CheckBox) convertView.findViewById(R.id.che);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.textView.setText(data.get(groupPosition).getSellerName());
        //设置一级列表checkBox的状态
        holder.che.setChecked(data.get(groupPosition).isChecked());
        //一级列表checkBox的点击事件
        holder.che.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //判断一级列表复选框的状态  设置为true或false
                data.get(groupPosition).setChecked(holder.che.isChecked());
                //改变二级checkbod的状态
                changeChildCbState(groupPosition, holder.che.isChecked());
                //算钱
                EventBus.getDefault().post(computer());
                //改变全选状态   isAllGroupCbSelect判断一级是否全部选中
                changeAllCbState(isAllGroupCbSelect());
                //必刷新
                notifyDataSetChanged();
            }
        });
        return convertView;
    }

    //二级标题
    @Override
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        Fresco.initialize(context);
        final ShoppingcarBean.DataBean.ListBean listBean = list.get(groupPosition).get(childPosition);
        final ViewHolder2 holder2;
        if (convertView == null) {
            holder2 = new ViewHolder2();
            convertView = View.inflate(context, R.layout.chidren, null);
            holder2.z_title = (TextView) convertView.findViewById(R.id.z_title);
            holder2.z_che = (CheckBox) convertView.findViewById(R.id.z_che);
            holder2.img = (SimpleDraweeView) convertView.findViewById(R.id.z_img);
            holder2.price = (TextView) convertView.findViewById(R.id.z_price);
            holder2.xiangqing = (TextView) convertView.findViewById(R.id.z_shuxing);
            holder2.jian = (ImageView) convertView.findViewById(R.id.iv_jian);
            holder2.jia = (ImageView) convertView.findViewById(R.id.iv_add);
            holder2.del = (ImageView) convertView.findViewById(R.id.del);
            holder2.num = (TextView) convertView.findViewById(R.id.tv_num);
            convertView.setTag(holder2);

        } else {
            holder2 = (ViewHolder2) convertView.getTag();
        }
        holder2.num.setText(list.get(groupPosition).get(childPosition).getNum() + "");
        holder2.z_title.setText(list.get(groupPosition).get(childPosition).getTitle());
        holder2.price.setText("¥" + list.get(groupPosition).get(childPosition).getBargainPrice());
        holder2.xiangqing.setText(list.get(groupPosition).get(childPosition).getSubhead());
        String images = list.get(groupPosition).get(childPosition).getImages();
        String[] split = images.split("\\|");
        //   ImageLoader.getInstance().displayImage(split[0], holder2.img);
        Uri parse = Uri.parse(split[0]);
        holder2.img.setImageURI(parse);
        //判断是否需要显示删除按钮
        if (!isVisible) {
            //隐藏
            holder2.del.setVisibility(View.GONE);
        } else {
            holder2.del.setVisibility(View.VISIBLE);
        }

        //设置二级列表checkbox的属性
        holder2.z_che.setChecked(list.get(groupPosition).get(childPosition).isChecked());
        //二级列表的点击事件
        holder2.z_che.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //设置该条目中的checkbox属性值
                listBean.setChecked(holder2.z_che.isChecked());
                //计算价钱
                PriceAndCountEvent priceAndCountEvent = computer();
                EventBus.getDefault().post(priceAndCountEvent);
                //判断当前checkbox是选中的状态
                if (holder2.z_che.isChecked()) {
                    //如果全部选中(isAllChildCbSelected)
                    if (isAllChildCbSelected(groupPosition)) {
                        //改变一级列表的状态
                        changeGroupCbState(groupPosition, true);
                        //改变全选的状态
                        changeAllCbState(isAllGroupCbSelect());
                    }
                } else {
                    //如果没有全部选中,一级列表的checkbox为false不为选中
                    changeGroupCbState(groupPosition, false);
                    changeAllCbState(isAllGroupCbSelect());
                }
                notifyDataSetChanged();
            }
        });
        updateGoodsPresenter = new UpdateGoodsPresenter(this);
        //加号
        holder2.jia.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int num = listBean.getNum();
                //num为int类型所以要加空字符串
                holder2.num.setText(++num + "");
                listBean.setNum(num);
                updateGoodsPresenter.updateGoods(listBean.getPid() + "", listBean.getSellerid() + "", listBean.getSelected() + "", num + "");
                //如果二级列表的checkbox为选中,计算价钱
                if (holder2.z_che.isChecked()) {
                    PriceAndCountEvent priceAndCountEvent = computer();
                    EventBus.getDefault().post(priceAndCountEvent);
                }
            }
        });
        //减号
        holder2.jian.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int num = listBean.getNum();
                if (num == 1) {
                    Toast.makeText(context, "已经不能再减了，", Toast.LENGTH_SHORT).show();
                    return;
                }

                holder2.num.setText(--num + "");
                listBean.setNum(num);
                updateGoodsPresenter.updateGoods(listBean.getPid() + "", listBean.getSellerid() + "", listBean.getSelected() + "", num + "");
                if (holder2.z_che.isChecked()) {
                    PriceAndCountEvent priceAndCountEvent = computer();
                    EventBus.getDefault().post(priceAndCountEvent);
                }
            }
        });

        deleteGoodsPresenter = new DeleteGoodsPresenter(this);
        myself = context.getSharedPreferences("myself", Context.MODE_PRIVATE);
        uid = myself.getString("uid", null);
        //点击删除购物车里面的内容
        holder2.del.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (holder2.z_che.isChecked()) {
                    AlertDialog.Builder builder = new AlertDialog.Builder(context);
                    builder.setMessage("确认要删除吗？");
                    builder.setTitle("提示");
                    builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            deleteGoodsPresenter.deleteGoods(list.get(groupPosition).get(childPosition).getPid() + "");
                            Toast.makeText(context, "删除成功", Toast.LENGTH_SHORT).show();
                            List<ShoppingcarBean.DataBean.ListBean> listBeen = list.get(groupPosition);
                            ShoppingcarBean.DataBean.ListBean remove = listBeen.remove(childPosition);
                            if (listBeen.size() == 0) {
                                //先移除二级列表的集合,再移除一级列表的集合
                                list.remove(groupPosition);
                                data.remove(groupPosition);
                            }
                            //算钱
                            EventBus.getDefault().post(computer());
                            notifyDataSetChanged();
                            dialog.dismiss();
                        }
                    });
                    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Toast.makeText(context, "取消删除", Toast.LENGTH_SHORT).show();
                            dialog.dismiss();
                        }
                    });
                    builder.create().show();

                    //点击传值


                } else {
                    Toast.makeText(context, "请选择商品", Toast.LENGTH_SHORT).show();
                }

            }
        });
        return convertView;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }

    @Override
    public void onSuccess(DeleteGoodsBean deleteGoodsBean) {

    }

    @Override
    public void onSuccess(UpdateGoodsBean updateGoodsBean) {
        Log.e("updateGoodsBean", "OK" + updateGoodsBean.getMsg());
    }

    @Override
    public void onFailed(Throwable throwable) {
        Log.e("updateGoodsBean", "No" + throwable.toString());
    }


    class ViewHolder {
        TextView textView;
        CheckBox che;
    }

    class ViewHolder2 {
        SimpleDraweeView img;
        TextView z_title;
        CheckBox z_che;
        TextView price;
        TextView xiangqing;
        ImageView jia;
        ImageView jian;
        ImageView del;
        TextView num;
    }

    //改变二级列表的checkbox的状态   如果一级选中,控制二级也选中
    private void changeChildCbState(int groupPosition, boolean flag) {
        List<ShoppingcarBean.DataBean.ListBean> listBeen = list.get(groupPosition);
        for (int j = 0; j < listBeen.size(); j++) {
            ShoppingcarBean.DataBean.ListBean listBean = listBeen.get(j);
            listBean.setChecked(flag);
        }
    }

    //判断一级列表是否全部选中
    public boolean isAllGroupCbSelect() {
        for (int i = 0; i < list.size(); i++) {
            ShoppingcarBean.DataBean dataBean = data.get(i);
            if (!dataBean.isChecked()) {
                return false;
            }
        }
        return true;
    }

    //改变全选的状态
    private void changeAllCbState(boolean flag) {
        MessageEvent messageEvent = new MessageEvent();
        messageEvent.setCheckd(flag);
        EventBus.getDefault().post(messageEvent);
    }

    //改变一级列表的checkbox的状态
    private void changeGroupCbState(int i, boolean flag) {
        ShoppingcarBean.DataBean dataBean = data.get(i);
        dataBean.setChecked(flag);
    }

    //判断二级列表是否全部选中
    private boolean isAllChildCbSelected(int i) {
        List<ShoppingcarBean.DataBean.ListBean> listBeen = list.get(i);
        for (int j = 0; j < listBeen.size(); j++) {
            ShoppingcarBean.DataBean.ListBean listBean = listBeen.get(j);
            if (!listBean.isChecked()) {
                return false;
            }
        }
        return true;
    }

    //设置全选,反选
    public void changeAllListCbState(boolean flag) {
        for (int i = 0; i < list.size(); i++) {
            changeGroupCbState(i, flag);
            changeChildCbState(i, flag);
        }
        //算钱
        EventBus.getDefault().post(computer());
        notifyDataSetChanged();
    }

    //计算列表的价钱
    private PriceAndCountEvent computer() {
        int count = 0;
        double price = 0;
        int to = 0;
        for (int i = 0; i < list.size(); i++) {
            List<ShoppingcarBean.DataBean.ListBean> listBeen = list.get(i);
            for (int j = 0; j < listBeen.size(); j++) {
                ShoppingcarBean.DataBean.ListBean listBean = listBeen.get(j);
                if (listBean.isChecked()) {
                    price += listBean.getNum() * listBean.getBargainPrice();
                    count += listBean.getNum();
                    to += listBean.getNum();
                }
            }
        }
        PriceAndCountEvent priceAndCountEvent = new PriceAndCountEvent();
        priceAndCountEvent.setCount(count);
        priceAndCountEvent.setPrice(price);
        priceAndCountEvent.setTo(to);
        return priceAndCountEvent;
    }

    /**
     * 是否隐藏删除按钮
     *
     * @param isVisible
     * @return
     */
    public void showDelete(boolean isVisible) {
        this.isVisible = isVisible;
        notifyDataSetChanged();
    }
}

PriceAndCountEvent

package com.bwie.myapplication.adapter;


public class PriceAndCountEvent {
    private double price;
    private int count;
    private int to;

    public double getPrice() {
        return price;
    }

    public int getCount() {
        return count;
    }

    public int getTo() {
        return to;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public void setTo(int to) {
        this.to = to;
    }
}

bean:

DeleteGoodsBean

package com.bwie.myapplication.bean;

public class DeleteGoodsBean {

    /**
     * msg : 删除购物车成功
     * code : 0
     */

    private String msg;
    private String code;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}

ShoppingcarBean

package com.bwie.myapplication.bean;

import java.util.List;

public class ShoppingcarBean {

    /**
     * msg : 请求成功
     * code : 0
     * data : [{"list":[{"bargainPrice":11800,"createtime":"2017-10-03T23:53:28","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","num":1,"pid":71,"price":32999,"pscid":40,"selected":0,"sellerid":15,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"}],"sellerName":"商家15","sellerid":"15"}]
     */

    private String msg;
    private String code;
    private List<DataBean> data;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {

        /**
         * list : [{"bargainPrice":11800,"createtime":"2017-10-03T23:53:28","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","num":1,"pid":71,"price":32999,"pscid":40,"selected":0,"sellerid":15,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G"}]
         * sellerName : 商家15
         * sellerid : 15
         */

        private String sellerName;
        private String sellerid;
        private List<ListBean> list;
        private boolean checked;

        public boolean isChecked() {
            return checked;
        }

        public void setChecked(boolean checked) {
            this.checked = checked;
        }

        public String getSellerName() {
            return sellerName;
        }

        public void setSellerName(String sellerName) {
            this.sellerName = sellerName;
        }

        public String getSellerid() {
            return sellerid;
        }

        public void setSellerid(String sellerid) {
            this.sellerid = sellerid;
        }

        public List<ListBean> getList() {
            return list;
        }

        public void setList(List<ListBean> list) {
            this.list = list;
        }

        public static class ListBean {
            /**
             * bargainPrice : 11800.0
             * createtime : 2017-10-03T23:53:28
             * detailUrl : https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1
             * images : https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg
             * num : 1
             * pid : 71
             * price : 32999.0
             * pscid : 40
             * selected : 0
             * sellerid : 15
             * subhead : 购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）
             * title : 全球购 新款Apple MacBook Pro 苹果笔记本电脑 银色VP2新13英寸Bar i5/8G/256G
             */

            private double bargainPrice;
            private String createtime;
            private String detailUrl;
            private String images;
            private int num;
            private int pid;
            private double price;
            private int pscid;
            private int selected;
            private int sellerid;
            private String subhead;
            private String title;
            private boolean checked;

            public boolean isChecked() {
                return checked;
            }

            public void setChecked(boolean checked) {
                this.checked = checked;
            }

            public double getBargainPrice() {
                return bargainPrice;
            }

            public void setBargainPrice(double bargainPrice) {
                this.bargainPrice = bargainPrice;
            }

            public String getCreatetime() {
                return createtime;
            }

            public void setCreatetime(String createtime) {
                this.createtime = createtime;
            }

            public String getDetailUrl() {
                return detailUrl;
            }

            public void setDetailUrl(String detailUrl) {
                this.detailUrl = detailUrl;
            }

            public String getImages() {
                return images;
            }

            public void setImages(String images) {
                this.images = images;
            }

            public int getNum() {
                return num;
            }

            public void setNum(int num) {
                this.num = num;
            }

            public int getPid() {
                return pid;
            }

            public void setPid(int pid) {
                this.pid = pid;
            }

            public double getPrice() {
                return price;
            }

            public void setPrice(double price) {
                this.price = price;
            }

            public int getPscid() {
                return pscid;
            }

            public void setPscid(int pscid) {
                this.pscid = pscid;
            }

            public int getSelected() {
                return selected;
            }

            public void setSelected(int selected) {
                this.selected = selected;
            }

            public int getSellerid() {
                return sellerid;
            }

            public void setSellerid(int sellerid) {
                this.sellerid = sellerid;
            }

            public String getSubhead() {
                return subhead;
            }

            public void setSubhead(String subhead) {
                this.subhead = subhead;
            }

            public String getTitle() {
                return title;
            }

            public void setTitle(String title) {
                this.title = title;
            }
        }
    }
}

UpdateGoodsBean

package com.bwie.myapplication.bean;

public class UpdateGoodsBean {

    /**
     * msg : success
     * code : 0
     */

    private String msg;
    private String code;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}

model:

MyModel

package com.bwie.myapplication.model;

import com.bwie.myapplication.bean.DeleteGoodsBean;
import com.bwie.myapplication.bean.ShoppingcarBean;
import com.bwie.myapplication.bean.UpdateGoodsBean;
import com.bwie.myapplication.utils.RetiofitUtils;
import com.bwie.myapplication.utils.RetiofitVip;

import io.reactivex.Observable;

public class MyModel {
    //查询购物车
    public Observable<ShoppingcarBean> shoppingcar() {
        RetiofitVip retiofitVip = RetiofitUtils.getInstance().create(RetiofitVip.class);
        return retiofitVip.shoppingCar("3381");
    }

    //删除购物车
    public Observable<DeleteGoodsBean> deleteGoods(String pid) {
        RetiofitVip retiofitVip = RetiofitUtils.getInstance().create(RetiofitVip.class);
        return retiofitVip.deleteGoods("3381", pid);
    }

    //更新购物车
    public Observable<UpdateGoodsBean> updateGoods(String pid, String sellerid, String selected, String num) {
        RetiofitVip retiofitVip = RetiofitUtils.getInstance().create(RetiofitVip.class);
        return retiofitVip.updateGoods("3381", pid, sellerid, selected, num);
    }
}

presenter:

DeleteGoodsPresenter

package com.bwie.myapplication.presenter;

import com.bwie.myapplication.bean.DeleteGoodsBean;
import com.bwie.myapplication.model.MyModel;
import com.bwie.myapplication.view.IDeleteGoodsView;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;

public class DeleteGoodsPresenter extends IPresenter<IDeleteGoodsView> {
    private MyModel model;

    public DeleteGoodsPresenter(IDeleteGoodsView view) {
        super(view);
    }

    @Override
    protected void init() {
        model = new MyModel();
    }

    public void deleteGoods(String pid) {
        Observable<DeleteGoodsBean> shoppingcar = model.deleteGoods(pid);
        shoppingcar
                //需要在子线程中联网
                .subscribeOn(Schedulers.io())
                //需要在UI线程中更新UI
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<DeleteGoodsBean>() {
                    @Override
                    public void accept(DeleteGoodsBean deleteGoodsBean) throws Exception {
                        view.onSuccess(deleteGoodsBean);
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        view.onFailed(throwable);
                    }
                });
    }
}

IPresenter

package com.bwie.myapplication.presenter;

import com.bwie.myapplication.view.IView;

public abstract class IPresenter<T extends IView> {
    protected T view;

    public IPresenter(T view) {
        this.view = view;
        init();
    }

    protected abstract void init();
}

ShoppingCarPersenter

package com.bwie.myapplication.presenter;

import com.bwie.myapplication.bean.ShoppingcarBean;
import com.bwie.myapplication.model.MyModel;
import com.bwie.myapplication.view.IShoppingcarView;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class ShoppingCarPersenter extends IPresenter<IShoppingcarView> {
    private MyModel model;

    public ShoppingCarPersenter(IShoppingcarView view) {
        super(view);
    }

    @Override
    protected void init() {
        model = new MyModel();
    }

    public void shoppingCar() {
        Observable<ShoppingcarBean> shoppingcar = model.shoppingcar();
        shoppingcar
                //需要在子线程中联网
                .subscribeOn(Schedulers.io())
                //需要在UI线程中更新UI
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<ShoppingcarBean>() {
                    @Override
                    public void accept(ShoppingcarBean shoppingcarBean) throws Exception {
                        view.onSuccess(shoppingcarBean);
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        view.onFailed(throwable);
                    }
                });
    }
}

UpdateGoodsPresenter

package com.bwie.myapplication.presenter;

import com.bwie.myapplication.bean.UpdateGoodsBean;
import com.bwie.myapplication.model.MyModel;
import com.bwie.myapplication.view.IUpdateGoodsView;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class UpdateGoodsPresenter extends IPresenter<IUpdateGoodsView> {
    private MyModel model;

    public UpdateGoodsPresenter(IUpdateGoodsView view) {
        super(view);
    }

    @Override
    protected void init() {
        model = new MyModel();
    }

    public void updateGoods(String pid, String sellerid, String selected, String num) {
        Observable<UpdateGoodsBean> updateGoodsObservable = model.updateGoods(pid, sellerid, selected, num);
        updateGoodsObservable
                //需要在子线程中联网
                .subscribeOn(Schedulers.io())
                //需要在UI线程中更新UI
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<UpdateGoodsBean>() {
                    @Override
                    public void accept(UpdateGoodsBean updateGoodsBean) throws Exception {
                        view.onSuccess(updateGoodsBean);
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        view.onFailed(throwable);
                    }
                });
    }
}

utils:

Intercept

package com.bwie.myapplication.utils;

import java.io.IOException;

import okhttp3.HttpUrl;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;


public class Intercept implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request original = chain.request();
        HttpUrl url = original.url().newBuilder()
                .addQueryParameter("source", "android")
                .build();
        //添加请求头
        Request request = original.newBuilder()
                .url(url)
                .build();
        return chain.proceed(request);
    }
}

RetiofitUtils

package com.bwie.myapplication.utils;

import java.util.concurrent.TimeUnit;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;



public class RetiofitUtils {
    public static final String BASE_URL = "http://120.27.23.105/";
    private final Retrofit mRetrofit;

    public static class SINGLE_HOLDER {
        public static final RetiofitUtils INSTANCE = new RetiofitUtils(BASE_URL);
    }

    public static RetiofitUtils getInstance() {
        return SINGLE_HOLDER.INSTANCE;
    }

    private RetiofitUtils(String baseUrl) {
        mRetrofit = buildRetrofit();
    }

    private OkHttpClient buildOkHttpClient() {
        return new OkHttpClient.Builder()
                .connectTimeout(10000, TimeUnit.MILLISECONDS)
                .addInterceptor(new Intercept())
                .build();
    }

    private Retrofit buildRetrofit() {
        return new Retrofit.Builder()
                .client(buildOkHttpClient())
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
    }

    public <T> T create(Class<T> tClass) {
        return mRetrofit.create(tClass);
    }

}

RetiofitVip

package com.bwie.myapplication.utils;

import com.bwie.myapplication.bean.DeleteGoodsBean;
import com.bwie.myapplication.bean.ShoppingcarBean;
import com.bwie.myapplication.bean.UpdateGoodsBean;

import io.reactivex.Observable;
import retrofit2.http.GET;
import retrofit2.http.Query;


public interface RetiofitVip {
    //查询购物车接口
    @GET("product/getCarts")
    Observable<ShoppingcarBean> shoppingCar(@Query("uid") String uid);

    //删除购物车
    @GET("product/deleteCart")
    Observable<DeleteGoodsBean> deleteGoods(@Query("uid") String uid,
                                            @Query("pid") String pid);

    //更新购物车
    @GET("product/updateCarts")
    Observable<UpdateGoodsBean> updateGoods(@Query("uid") String uid,
                                            @Query("pid") String pid,
                                            @Query("sellerid") String sellerid,
                                            @Query("selected") String selected,
                                            @Query("num") String num);
}

view:

IDeleteGoodsView

package com.bwie.myapplication.view;


import com.bwie.myapplication.bean.DeleteGoodsBean;


public interface IDeleteGoodsView extends IView {
    void onSuccess(DeleteGoodsBean deleteGoodsBean);

    void onFailed(Throwable throwable);
}

IShoppingcarView

package com.bwie.myapplication.view;


import com.bwie.myapplication.bean.ShoppingcarBean;


public interface IShoppingcarView extends IView {
    void onSuccess(ShoppingcarBean shoppingcarBean);

    void onFailed(Throwable throwable);
}

IUpdateGoodsView

package com.bwie.myapplication.view;


import com.bwie.myapplication.bean.UpdateGoodsBean;


public interface IUpdateGoodsView extends IView {
    void onSuccess(UpdateGoodsBean updateGoodsBean);

    void onFailed(Throwable throwable);
}

IView

package com.bwie.myapplication.view;

public interface IView {
 
}

MainActivity

package com.bwie.myapplication.view;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;

import com.bwie.myapplication.R;
import com.bwie.myapplication.adapter.MessageEvent;
import com.bwie.myapplication.adapter.MyCarShowAdapter;
import com.bwie.myapplication.adapter.PriceAndCountEvent;
import com.bwie.myapplication.bean.ShoppingcarBean;
import com.bwie.myapplication.presenter.ShoppingCarPersenter;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;


public class MainActivity extends AppCompatActivity implements IShoppingcarView {

    @BindView(R.id.btnEditor)
    TextView btnEditor;
    @BindView(R.id.exlv)
    ExpandableListView exlv;
    @BindView(R.id.checkbox)
    CheckBox checkbox;
    @BindView(R.id.price)
    TextView prices;
    @BindView(R.id.num)
    TextView nums;
    @BindView(R.id.jiesuan)
    Button jiesuan;
    private ShoppingCarPersenter shoppingCarPersenter;
    private List<ShoppingcarBean.DataBean> grouplist = new ArrayList<>();
    private List<List<ShoppingcarBean.DataBean.ListBean>> childlist = new ArrayList<>();
    private MyCarShowAdapter myCarShowAdapter;
    private boolean flag = true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EventBus.getDefault().register(this);
        setContentView(R.layout.shopcar_layout);
        ButterKnife.bind(this);
        shoppingCarPersenter = new ShoppingCarPersenter(this);
        shoppingCarPersenter.shoppingCar();
    }

    @Override
    public void onSuccess(ShoppingcarBean shoppingcarBean) {
        List<ShoppingcarBean.DataBean> data = shoppingcarBean.getData();
        grouplist.clear();
        childlist.clear();
        grouplist.addAll(data);

        for (int i = 0; i < data.size(); i++) {
            List<ShoppingcarBean.DataBean.ListBean> list = data.get(i).getList();
            childlist.add(list);
        }
        myCarShowAdapter = new MyCarShowAdapter(MainActivity.this, grouplist, childlist);
        exlv.setAdapter(myCarShowAdapter);
        exlv.setGroupIndicator(null);
        // 展开
        for (int i = 0; i < data.size(); i++) {
            exlv.expandGroup(i);
        }
        myCarShowAdapter.notifyDataSetChanged();

    }

    @Override
    public void onFailed(Throwable throwable) {
        Log.e("Shopping", "ON" + throwable.toString());
    }

    @OnClick({R.id.btnEditor, R.id.checkbox})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.btnEditor:
                if (childlist.size() >= 0) {
                    btnEditor.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            if (!flag) {// false 隐藏 true 代表显示
                                //隐藏
                                flag = true;
                                myCarShowAdapter.showDelete(flag);
                                btnEditor.setText("完成");

                            } else {
                                //显示
                                flag = false;
                                myCarShowAdapter.showDelete(flag);
                                btnEditor.setText("编辑");
                            }
                        }
                    });
                }
                break;
            case R.id.checkbox:
                if (grouplist.size() <= 0 || childlist.size() <= 0) {
                    checkbox.setChecked(false);
                    Toast.makeText(MainActivity.this, "购物车为空", Toast.LENGTH_SHORT).show();
                } else {
                    //设置全选
                    myCarShowAdapter.changeAllListCbState(checkbox.isChecked());
                }
                break;
        }
    }


    @Subscribe
    public void onMessageEvent(MessageEvent event) {
        checkbox.setChecked(event.isCheckd());
    }

    @Subscribe
    public void onMessageEven(PriceAndCountEvent event) {
        prices.setText(event.getPrice() + "");
        nums.setText("共" + event.getCount() + "件商品");
        jiesuan.setText("去结算(" + event.getTo() + ")");
    }
}

布局文件结构如下:

chidren.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <CheckBox
        android:id="@+id/z_che"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="11dp" />

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:layout_toRightOf="@id/z_che"
        android:orientation="vertical">

        <TextView
            android:id="@+id/z_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="三只松鼠大礼包"
            android:textSize="16sp"
            android:textStyle="bold" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.facebook.drawee.view.SimpleDraweeView
                android:id="@+id/z_img"
                android:layout_width="140dp"
                android:layout_height="140dp"
                android:src="@mipmap/ic_launcher"
                app:fadeDuration="20"
                app:failureImage="@drawable/icon_failure"
                app:placeholderImage="@drawable/icon_progress_bar" />

            <TextView
                android:id="@+id/z_price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentTop="true"
                android:layout_marginLeft="5dp"
                android:layout_toEndOf="@+id/z_img"
                android:layout_toRightOf="@+id/z_img"
                android:text="价钱"
                android:textColor="#ff0000" />

            <TextView
                android:id="@+id/z_shuxing"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/z_price"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="5dp"
                android:layout_toEndOf="@+id/z_img"
                android:layout_toRightOf="@+id/z_img"
                android:text="价钱"
                android:textColor="@color/colorPrimary"
                android:textSize="14sp" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/z_shuxing"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="20dp"
                android:layout_toRightOf="@id/z_img"
                android:orientation="horizontal">

                <ImageView
                    android:id="@+id/iv_jian"
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/shopcart_minus_red" />

                <TextView
                    android:id="@+id/tv_num"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="10dp"
                    android:text="1"
                    android:textSize="20sp" />

                <ImageView
                    android:id="@+id/iv_add"
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:layout_marginLeft="5dp"
                    android:src="@drawable/shopcart_add_red" />

                <ImageView
                    android:id="@+id/del"
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:layout_gravity="right"
                    android:layout_weight="1"
                    android:src="@drawable/rublish" />
            </LinearLayout>
        </RelativeLayout>
    </LinearLayout>
</RelativeLayout>

group1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <CheckBox
        android:id="@+id/che"
        android:layout_width="25dp"
        android:layout_height="25dp"
        android:layout_marginTop="20dp" />

    <TextView
        android:id="@+id/g_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="20dp"
        android:text="------------" />
</LinearLayout>

shopcar_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#EBEBEB"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#ffffff"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/btnBack"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="返回"
            android:textSize="25sp" />


        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_weight="1"
            android:gravity="center"
            android:padding="10dp"
            android:text="购物车"
            android:textSize="25sp" />

        <TextView
            android:id="@+id/btnEditor"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="编辑"
            android:textSize="25sp" />

    </LinearLayout>

    <ExpandableListView
        android:id="@+id/exlv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#fff"></ExpandableListView>


    <RelativeLayout
        android:id="@+id/rl"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#ffffff">

        <CheckBox
            android:id="@+id/checkbox"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true" />

        <TextView
            android:id="@+id/qx"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/checkbox"
            android:text="全选" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/qx"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:text="总价：" />

            <TextView
                android:id="@+id/price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="0.00"
                android:textColor="#ff0000"
                android:textSize="16sp" />

            <TextView
                android:id="@+id/num"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:text="共0件商品"
                android:textColor="#ff0000" />

        </LinearLayout>

        <Button
            android:id="@+id/jiesuan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:background="#ff0000"
            android:text="去结算(0)" />

    </RelativeLayout>

</LinearLayout>

注:以上代码仅供参考