Retrofit+Rxjava+MVP网络请求购物车

落日映苍穹つ 2022-06-02 06:40 194阅读 0赞

效果图：

![这里写图片描述][SouthEast]  
![这里写图片描述][SouthEast 1]

**首先先导依赖**

//retrofit依赖 compile 'com.squareup.retrofit2:converter-gson:2.3.0' //retrofit内部封装的GSON compile 'io.reactivex.rxjava2:rxjava:2.1.7' compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0' compile 'io.reactivex.rxjava2:rxandroid:2.0.1' compile 'com.facebook.fresco:fresco:0.12.0' compile 'com.facebook.fresco:animated-base-support:0.12.0' compile 'com.facebook.fresco:animated-webp:0.12.0' compile 'com.facebook.fresco:webpsupport:0.12.0' compile 'com.jakewharton:butterknife:6.1.0' compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

**网络权限**

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

**在values文件里创建一个attrs**

**住布局activity\_main.xml**

**加减器布局jiajianqi.xml**

**布局gowuc\_goods\_item.xml**

**注意事件 《com.example.retrofitdemo5.AddDeleteView 把你自己创建的AddDeleteView 类的com.example.retrofitdemo5复制过去**

**布局gowuc\_group\_item.xml**

**创建Bean包**

**CarBean 类**

/** * msg : 请求成功 * code : 0 * data : [{"list":[{"bargainPrice":11800,"createtime":"2017-10-10T17:33:37","detailUrl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg","num":2,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 MX150 2G显存】全高清窄边框 8G内存 256固态硬盘 支持指纹识别 预装WIN10系统","title":"小米(MI)Air 13.3英寸全金属轻薄笔记本(i5-7200U 8G 256G PCle SSD MX150 2G独显 FHD 指纹识别 Win10）银\r\n"},{"bargainPrice":99,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg","num":6,"pid":45,"price":2999,"pscid":39,"selected":0,"sellerid":1,"subhead":"高清双摄，就是清晰！2000+1600万高清摄像头，6GB大内存+高通骁龙835处理器，性能怪兽！","title":"一加手机5 (A5000) 6GB+64GB 月岩灰 全网通 双卡双待 移动联通电信4G手机"}],"sellerName":"商家1","sellerid":"1"},{"list":[{"bargainPrice":11800,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/5025518.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t8830/106/1760940277/195595/5cf9412f/59bf2ef5N5ab7dc16.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5428/70/1520969931/274676/b644dd0d/591128e7Nd2f70da0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5566/365/1519564203/36911/620c750c/591128eaN54ac3363.jpg!q70.jpg","num":1,"pid":58,"price":6399,"pscid":40,"selected":0,"sellerid":2,"subhead":"升级4G大显存！Nvme协议Pcie SSD,速度快人一步】GTX1050Ti就选拯救者！专业游戏键盘&新模具全新设计！","title":"联想(Lenovo)拯救者R720 15.6英寸游戏笔记本电脑(i5-7300HQ 8G 1T+128G SSD GTX1050Ti 4G IPS 黑)"}],"sellerName":"商家2","sellerid":"2"},{"list":[{"bargainPrice":22.9,"createtime":"2017-10-03T23:53:28","detailUrl":"https://item.m.jd.com/product/2542855.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t1930/284/2865629620/390243/e3ade9c4/56f0a08fNbd3a1235.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2137/336/2802996626/155915/e5e90d7a/56f0a09cN33e01bd0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t1882/31/2772215910/389956/c8dbf370/56f0a0a2Na0c86ea6.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2620/166/2703833710/312660/531aa913/57709035N33857877.jpg!q70.jpg","num":1,"pid":26,"price":88,"pscid":2,"selected":0,"sellerid":3,"subhead":"三只松鼠零食特惠，专区满99减50，满199减100，火速抢购》","title":"三只松鼠 坚果炒货 零食奶油味 碧根果225g/袋"}],"sellerName":"商家3","sellerid":"3"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-14T21:39:05","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":11,"pid":1,"price":118,"pscid":1,"selected":0,"sellerid":17,"subhead":"每个中秋都不能简单，无论身在何处，你总需要一块饼让生活更圆满，京东月饼让爱更圆满京东自营，闪电配送，更多惊喜，快用手指戳一下","title":"北京稻香村 稻香村中秋节月饼 老北京月饼礼盒655g"}],"sellerName":"商家17","sellerid":"17"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-14T21:39:05","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":7,"pid":2,"price":299,"pscid":1,"selected":0,"sellerid":18,"subhead":"每个中秋都不能简单，无论身在何处，你总需要一块饼让生活更圆满，京东月饼让爱更圆满京东自营，闪电配送，更多惊喜，快用手指戳一下","title":"北京稻香村 稻香村中秋节月饼 老北京月饼礼盒655g"}],"sellerName":"商家18","sellerid":"18"}] */
    
        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":"2017-10-10T17:33:37","detailUrl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg","num":2,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 MX150 2G显存】全高清窄边框 8G内存 256固态硬盘 支持指纹识别 预装WIN10系统","title":"小米(MI)Air 13.3英寸全金属轻薄笔记本(i5-7200U 8G 256G PCle SSD MX150 2G独显 FHD 指纹识别 Win10）银\r\n"},{"bargainPrice":99,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg","num":6,"pid":45,"price":2999,"pscid":39,"selected":0,"sellerid":1,"subhead":"高清双摄，就是清晰！2000+1600万高清摄像头，6GB大内存+高通骁龙835处理器，性能怪兽！","title":"一加手机5 (A5000) 6GB+64GB 月岩灰 全网通 双卡双待 移动联通电信4G手机"}] * sellerName : 商家1 * sellerid : 1 */
    
            private String sellerName;
            private String sellerid;
            private List<ListBean> list;
    
            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 : 2017-10-10T17:33:37 * detailUrl : https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends * images : https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg * num : 2 * pid : 57 * price : 5199.0 * pscid : 40 * selected : 0 * sellerid : 1 * subhead : 【i5 MX150 2G显存】全高清窄边框 8G内存 256固态硬盘 支持指纹识别 预装WIN10系统 * title : 小米(MI)Air 13.3英寸全金属轻薄笔记本(i5-7200U 8G 256G PCle SSD MX150 2G独显 FHD 指纹识别 Win10）银 */
    
                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;
    
                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;
                }
            }
        }

**GoodsBean类**

private boolean goodscheck;
        private double bargainPrice;
        private String images;
        private String title;
        private String subhead;
        private int num;
        private boolean btn;
        private int pid;
    
        public GoodsBean(boolean goodscheck, double bargainPrice, String images, String title, String subhead, int num, boolean btn) {
            this.goodscheck = goodscheck;
            this.bargainPrice = bargainPrice;
            this.images = images;
            this.title = title;
            this.subhead = subhead;
            this.num = num;
            this.btn = btn;
        }
    
        public GoodsBean(boolean goodscheck, double bargainPrice, String images, String title, String subhead, int num, int pid) {
            this.goodscheck = goodscheck;
            this.bargainPrice = bargainPrice;
            this.images = images;
            this.title = title;
            this.subhead = subhead;
            this.num = num;
            this.pid = pid;
        }
    
        public int getPid() {
            return pid;
        }
    
        public void setPid(int pid) {
            this.pid = pid;
        }
    
        public boolean isBtn() {
            return btn;
        }
    
        public void setBtn(boolean btn) {
            this.btn = btn;
        }
    
        public int getNum() {
            return num;
        }
    
        public void setNum(int num) {
            this.num = num;
        }
    
        public boolean isGoodscheck() {
            return goodscheck;
        }
    
        public void setGoodscheck(boolean goodscheck) {
            this.goodscheck = goodscheck;
        }
    
        public double getBargainPrice() {
            return bargainPrice;
        }
    
        public void setBargainPrice(double bargainPrice) {
            this.bargainPrice = bargainPrice;
        }
    
        public String getImages() {
            return images;
        }
    
        public void setImages(String images) {
            this.images = images;
        }
    
        public String getTitle() {
            return title;
        }
    
        public void setTitle(String title) {
            this.title = title;
        }
    
        public String getSubhead() {
            return subhead;
        }
    
        public void setSubhead(String subhead) {
            this.subhead = subhead;
        }
    
        @Override
        public String toString() {
            return "GoodsBean{" +
                    "goodscheck=" + goodscheck +
                    ", bargainPrice=" + bargainPrice +
                    ", images='" + images + '\'' +
                    ", title='" + title + '\'' +
                    ", subhead='" + subhead + '\'' +
                    ", num=" + num +
                    ", btn=" + btn +
                    '}';
        }

**GroupBean类**

private boolean groupcheck;
        private String sellerName;
        private String sellerid;
    
        public GroupBean(boolean groupcheck, String sellerName, String sellerid) {
            this.groupcheck = groupcheck;
            this.sellerName = sellerName;
            this.sellerid = sellerid;
        }
    
        public boolean isGroupcheck() {
            return groupcheck;
        }
    
        public void setGroupcheck(boolean groupcheck) {
            this.groupcheck = groupcheck;
        }
    
        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;
        }
    
        @Override
        public String toString() {
            return "GroupBean{" +
                    "groupcheck=" + groupcheck +
                    ", sellerName='" + sellerName + '\'' +
                    ", sellerid=" + sellerid +
                    '}';
        }

**view包里**

**CarView类**

public interface CarView extends IView{ 
    
        void CarSuccess(CarBean carBean);
        void CarFaild(Throwable throwable);
    }

**IView类**

public interface IView {
    
    }

**utils包**

**RetrofitManager类**

public class RetrofitManager { private static final String Url="http://120.27.23.105/"; private static Retrofit mRetrofit; private static class Car_Holder{ private static final RetrofitManager instance=new RetrofitManager(Url); } public static RetrofitManager getinstance() { return Car_Holder.instance; } public RetrofitManager(String url) { mRetrofit= buildRetrofit(); } //OkHttpClient private OkHttpClient buildOkHttpClient(){ return new OkHttpClient.Builder() .connectTimeout(10000, TimeUnit.MILLISECONDS) .build(); } //Retrofit private Retrofit buildRetrofit(){ return new Retrofit.Builder() .client(buildOkHttpClient()) .baseUrl(Url) .addConverterFactory(GsonConverterFactory.create()) .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .build(); } public <T> T create(Class<T> tClass){ return mRetrofit.create(tClass); } }

**AddDeleteView类**

public class AddDeleteView extends LinearLayout { 
        private OnAddDelClickListener listener;
        private EditText etNumber;
        //对外提供一个点击的回调接口
        public interface OnAddDelClickListener { 
            void onAddClick(View v);
    
            void onDelClick(View v);
        }
    
        public void setOnAddDelClickListener(OnAddDelClickListener listener) {
            if (listener != null) {
                this.listener = listener;
            }
        }
        public AddDeleteView(Context context) {
            this(context, null);
        }
    
        public AddDeleteView(Context context, @Nullable AttributeSet attrs) {
            this(context, attrs, 0);
        }
    
        public AddDeleteView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            initView(context, attrs, defStyleAttr);
        }
    
        private void initView(Context context, AttributeSet attrs, int defStyleAttr) {
            View.inflate(context, R.layout.adddelete, this);
            TextView txtDelete = (TextView) findViewById(R.id.tv_delete);
            TextView txtAdd = (TextView) findViewById(R.id.tv_add);
            etNumber = (EditText) findViewById(R.id.ed_num);
    
            TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AddDeleteView);
    
            String leftText = typedArray.getString(R.styleable.AddDeleteView_left_item);
            String rightText = typedArray.getString(R.styleable.AddDeleteView_right_item);
            String middleText = typedArray.getString(R.styleable.AddDeleteView_middle_item);
    
            txtDelete.setText(leftText);
            txtAdd.setText(rightText);
            etNumber.setText(middleText);
    
            //回收
            typedArray.recycle();
            txtDelete.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    listener.onDelClick(view);
                }
            });
    
            txtAdd.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    listener.onAddClick(view);
                }
            });
        }
        //对外提供一个修改数字的方法
        public void setNumber(int number) {
            if (number > 0) {
                etNumber.setText(number + "");
            }
        }
        //对外提供一个获取当前数字的方法
        public int getNumber() {
            String string = etNumber.getText().toString();
            int i = Integer.parseInt(string);
            return i;
        }
    }

**CarApi类**

public interface CarApi { 
    
        @GET("product/getCarts")
        Observable<CarBean> selectcar(@Query("uid") String uid);
    }

**MyApp类**

public class MyApp extends Application { 
        @Override
        public void onCreate() {
            super.onCreate();
            Fresco.initialize(this);
        }
    }

**model包**

**CarModel类**

public class CarModel implements IModel { 
    
        //查询购物车
        public Observable<CarBean> selectcar(){
            CarApi carApi = RetrofitManager.getinstance().create(CarApi.class);
            return carApi.selectcar("1600");
        }
    }

**IModel类**

public interface IModel { }

**adapter包**

**CarAdapter类**

public class CarAdapter extends BaseExpandableListAdapter {
    
        Context context;
        List<GroupBean> grouplist;
        ArrayList<ArrayList<GoodsBean>> goodslist;
        MainActivity carActivity;
    
        public CarAdapter(Context context, List<GroupBean> grouplist, ArrayList<ArrayList<GoodsBean>> goodslist, MainActivity carActivity) {
            this.context = context;
            this.grouplist = grouplist;
            this.goodslist = goodslist;
            this.carActivity = carActivity;
        }
    
        @Override
        public int getGroupCount() {
            return grouplist.size();
        }
    
        @Override
        public int getChildrenCount(int i) {
            return goodslist.get(i).size();
        }
    
        @Override
        public Object getGroup(int i) {
            return grouplist.get(i);
        }
    
        @Override
        public Object getChild(int i, int i1) {
            return goodslist.get(i).get(i1);
        }
    
        @Override
        public long getGroupId(int i) {
            return i;
        }
    
        @Override
        public long getChildId(int i, int i1) {
            return i1;
        }
    
        @Override
        public boolean hasStableIds() {
            return false;
        }
        //父布局
    
        @Override
        public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
            View group_view = View.inflate(context, R.layout.gwc_group_item, null);
            final CheckBox check_group = group_view.findViewById(R.id.check_gwc_group);
            TextView group = group_view.findViewById(R.id.tv_gwc_group);
            check_group.setChecked(grouplist.get(i).isGroupcheck());
            group.setText(grouplist.get(i).getSellerName());
            check_group.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    GroupBean groupBean = grouplist.get(i);
                    groupBean.setGroupcheck(check_group.isChecked());
                    for (int j = 0; j <grouplist.size() ; j++) {
                        boolean groupcheck = grouplist.get(j).isGroupcheck();
                        if (!groupcheck){
                            carActivity.checkAll.setChecked(false);
                            break;
                        }else {
                            carActivity.checkAll.setChecked(true);
                        }
                    }
                    ArrayList<GoodsBean> goodsBeen = goodslist.get(i);
                    for (int i = 0; i <goodsBeen.size() ; i++) {
                        goodsBeen.get(i).setGoodscheck(check_group.isChecked());
                    }
                    //计算价格
                    carActivity.changesum(goodslist);
                    notifyDataSetChanged();
                }
            });
            return group_view;
        }
    
        //子布局
    
        @Override
        public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            View view = View.inflate(context, R.layout.gwc_goods_item, null);
            TextView tv_goods = (TextView) view.findViewById(R.id.tv_gwc_goods);
            TextView price = (TextView) view.findViewById(R.id.tv_gwc_price);
            final CheckBox check_goods = (CheckBox) view.findViewById(R.id.check_gwc_goods);
            ImageView img_goods = (ImageView) view.findViewById(R.id.img_gwc_goods);
            Button btn_delete = (Button) view.findViewById(R.id.btn_gwc_delete);
            final AddDeleteView adv = (AddDeleteView) view.findViewById(R.id.add_delete);
            tv_goods.setText(goodslist.get(groupPosition).get(childPosition).getTitle());
            price.setText(goodslist.get(groupPosition).get(childPosition).getBargainPrice() + "");
            check_goods.setChecked(goodslist.get(groupPosition).get(childPosition).isGoodscheck());
            String images = goodslist.get(groupPosition).get(childPosition).getImages();
            String[] split = images.split("\\|");
            Glide.with(img_goods.getContext()).load(split[0]).into(img_goods);
            adv.setNumber(goodslist.get(groupPosition).get(childPosition).getNum());
            adv.setNumber(goodslist.get(groupPosition).get(childPosition).getNum());
            if (goodslist.get(groupPosition).get(childPosition).isBtn()) {
                btn_delete.setVisibility(View.VISIBLE);
            } else {
                btn_delete.setVisibility(View.INVISIBLE);
            }
            adv.setOnAddDelClickListener(new AddDeleteView.OnAddDelClickListener() {
                @Override
                public void onAddClick(View v) {
                    int number = adv.getNumber();
                    number++;
                    adv.setNumber(number);
                    goodslist.get(groupPosition).get(childPosition).setNum(number);
                    carActivity.changesum(goodslist);
                }
    
                @Override
                public void onDelClick(View v) {
                    int number = adv.getNumber();
                    if (number > 1) {
                        number--;
                    }
                    adv.setNumber(number);
                    goodslist.get(groupPosition).get(childPosition).setNum(number);
                    carActivity.changesum(goodslist);
                }
            });
            btn_delete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    carActivity.deleteShop(goodslist.get(groupPosition).get(childPosition).getPid());
                    int size = goodslist.get(groupPosition).size();
                    if (goodslist.get(groupPosition).get(childPosition).isGoodscheck()) {
                        if (size == 1) {
                            goodslist.remove(groupPosition);
                            grouplist.remove(groupPosition);
                        } else {
                            goodslist.get(groupPosition).remove(childPosition);
                        }
                        carActivity.changesum(goodslist);
                        notifyDataSetChanged();
                    } else {
                        Toast.makeText(context, "请选择商品。。。", Toast.LENGTH_SHORT).show();
                    }
                }
            });
            check_goods.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //定义一个默认flag
                    boolean flag = false;
                    //获得当前二级列表复选框的状态
                    boolean cchecked = check_goods.isChecked();
                    //把当前状态存储到二级列表List集合里面
                    goodslist.get(groupPosition).get(childPosition).setGoodscheck(cchecked);
    
                    //循环遍历二级列表List集合
                    for (List<GoodsBean> i1 : goodslist) {
                        // 按照所有二级列表的item的个数进行循环遍历
                        for (int r = 0; r < i1.size(); r++) {
                            //获取当前二级列表的状态
                            boolean childCb1 = i1.get(r).isGoodscheck();
                            //取反设置 如果为true改为false 如果为false改为true
                            if (!childCb1) {
                                //如果当前二级列表中有一条复选框是false 全选为false
                                carActivity.checkAll.setChecked(false);
                                //如果当前二级列表中有一条复选框是false 一级列表为false
                                grouplist.get(groupPosition).setGroupcheck(false);
                                //flag为true跳出循环
                                flag = true;
                                break;
                            } else {
                                //如果所有的二级列表都为true 全选为true
                                carActivity.checkAll.setChecked(true);
                                //如果所有的二级列表都为true 一级列表为true
                                grouplist.get(groupPosition).setGroupcheck(true);
                            }
                        }
                        //falg为true时跳出循环
                        if (flag) {
                            break;
                        }
                    }
                    //当前二级列表的总长度
                    int size = goodslist.get(groupPosition).size();
                    //按照当前二级列表的总长度循环
                    for (int x = 0; x < size; x++) {
                        //获得当前二级列表中每一个item的选中状态
                        boolean childCb1 = goodslist.get(groupPosition).get(x).isGoodscheck();
                        //判断
                        if (!childCb1) {
                            //有一个flase 一级列表就设置false 跳出循环
                            grouplist.get(groupPosition).setGroupcheck(false);
                            break;
                        } else {
                            grouplist.get(groupPosition).setGroupcheck(true);
                        }
                    }
                    //计算价格
                    carActivity.changesum(goodslist);
                    //刷新适配器
                    notifyDataSetChanged();
                }
            });
            return view;
        }
    
    
        @Override
        public boolean isChildSelectable(int i, int i1) {
            return true;
        }
    }

**presenter包**

**CarPresenter类**

public class CarPresenter extends IPresenter<CarView>{
        private CarModel carModel;
    
        public CarPresenter(CarView view) {
            super(view);
        }
        @Override
        protected void inti() {
            carModel=new CarModel();
        }
    
        //查询购物车
    
        public  void selectcar(){
            Observable<CarBean> selectcar = carModel.selectcar();
    
            selectcar
                    //在io子线程联网
                    .subscribeOn(Schedulers.io())
                    //在主线程更新UI
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe(new Consumer<CarBean>() {
                                   @Override
                                   public void accept(CarBean carBean) throws Exception {
                                       view.CarSuccess(carBean);
                                   }
                               }
                            , new Consumer<Throwable>() {
                                @Override
                                public void accept(Throwable throwable) throws Exception {
                                    view.CarFaild(throwable);
                                }
                            }
                    );
        }
    }

**IPresenter类**

public abstract class IPresenter<T extends IView> { 
    
    
        protected T view;
    
        public IPresenter(T view) {
            this.view = view;
            inti();
        }
    
        protected abstract void inti();
    }

**MainActivity主页面**

public class MainActivity extends AppCompatActivity implements CarView{ 
    
    
        @InjectView(R.id.tv_bianji)
        TextView tvBianji;
        @InjectView(R.id.exlist)
        ExpandableListView exlist;
        @InjectView(R.id.check_all)
        public CheckBox checkAll;
        @InjectView(R.id.tv_zjprice)
        TextView price;
        TextView tvZjprice;
        @InjectView(R.id.tv_count)
        TextView counts;
        TextView tvCount;
        @InjectView(R.id.btn_js)
        Button btnJs;
        private CarPresenter carPresenter;
    
        private boolean flagedit = true;
    
        ArrayList<GroupBean> groupBeen = new ArrayList<>();
        ArrayList<ArrayList<GoodsBean>> goods = new ArrayList<>();
        private CarAdapter carAdapter;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            ButterKnife.inject(this);
    
            carPresenter = new CarPresenter(this);
            carPresenter.selectcar();
            carAdapter = new CarAdapter(this, groupBeen, goods, this);
            exlist.setAdapter(carAdapter);
            for (int i = 0; i < carAdapter.getGroupCount(); i++) {
                exlist.expandGroup(i);
            }
            carAdapter.notifyDataSetChanged();
        }
        @OnClick({R.id.tv_bianji, R.id.check_all, R.id.btn_js})
        public void onViewClicked(View view) {
            switch (view.getId()) {
                case R.id.tv_bianji:
                    String trim = tvBianji.getText().toString().trim();
                    if (trim.equals("编辑")) {
                        tvBianji.setText("完成");
                    } else {
                        tvBianji.setText("编辑");
                    }
                    for (List<GoodsBean> i1 : goods) {
                        for (int r = 0; r < i1.size(); r++) {
                            i1.get(r).setBtn(flagedit);
                        }
                    }
                    flagedit = !flagedit;
                    carAdapter.notifyDataSetChanged();
                    break;
                case R.id.check_all:
                    boolean checked = checkAll.isChecked();
                    for (int i = 0; i < groupBeen.size(); i++) {
                        groupBeen.get(i).setGroupcheck(checked);
                    }
                    for (int q = 0; q < goods.size(); q++) {
                        ArrayList<GoodsBean> goodsBeen = goods.get(q);
                        for (int j = 0; j < goodsBeen.size(); j++) {
                            goodsBeen.get(j).setGoodscheck(checked);
                        }
                    }
                    changesum(goods);
                    carAdapter.notifyDataSetChanged();
                    break;
                case R.id.btn_js:
                    int index = 0;
                    for (int q = 0; q < goods.size(); q++) {
                        ArrayList<GoodsBean> goodsBeen = goods.get(q);
                        for (int j = 0; j < goodsBeen.size(); j++) {
                            boolean goodscheck = goodsBeen.get(j).isGoodscheck();
                            if (goodscheck) {
                                index++;
                            }
                        }
                    }
                    if (index == 0) {
                        Toast.makeText(this, "请选择商品，谢谢", Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(this, "钱就是另一回事了", Toast.LENGTH_SHORT).show();
                    }
                    break;
            }
        }
    
        @Override
        public void CarSuccess(CarBean carBean) {
            List<CarBean.DataBean> data = carBean.getData();
            for (int i = 0; i < data.size(); i++) {
                groupBeen.add(new GroupBean(false, data.get(i).getSellerName(), data.get(i).getSellerid()));
                List<CarBean.DataBean.ListBean> list = data.get(i).getList();
                ArrayList<GoodsBean> goodsBeen = new ArrayList<>();
                for (int j = 0; j < list.size(); j++) {
                    goodsBeen.add(new GoodsBean(false, list.get(j).getBargainPrice(), list.get(j).getImages(), list.get(j).getTitle(), list.get(j).getSubhead(), list.get(j).getNum(), list.get(j).getPid()));
                }
                goods.add(goodsBeen);
            }
            for (int i = 0; i < carAdapter.getGroupCount(); i++) {
                exlist.expandGroup(i);
            }
            carAdapter.notifyDataSetChanged();
        }
    
        @Override
        public void CarFaild(Throwable throwable) {
    
        }
        DecimalFormat df = new DecimalFormat("######0.00");
    
        public void changesum(ArrayList<ArrayList<GoodsBean>> childBeen) {
            int count = 0;
            double sum = 0;
            for (List<GoodsBean> i1 : childBeen) {
                for (int r = 0; r < i1.size(); r++) {
                    boolean childCb1 = i1.get(r).isGoodscheck();
                    if (childCb1) {
                        double price = i1.get(r).getBargainPrice();
                        int num = i1.get(r).getNum();
                        sum += price * num;
                        count++;
                    }
                }
            }
            price.setText("￥" + df.format(sum));
            counts.setText(count + "");
        }
    
        public void deleteShop(int pid) {
            Toast.makeText(this, "aadas", Toast.LENGTH_SHORT).show();
        }
    
    }

希望进来看的能够给你们帮助，你要是有更好的方法，可以发信息给我。互相可以探讨一下。我这代码只是给你们参考。

[SouthEast]: /images/20220602/71ec3b695df04b97b4bfab0b48b38805.png
[SouthEast 1]: /images/20220602/f6d524952d524d78a01e8a9f9af67578.png