mvp+ExpandableListView二级列表+全选和全不选+单价合计

效果图

主布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context=".wight.MainActivity"><ExpandableListViewandroid:id="@+id/list_car"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_weight="1" /><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="50dp"><CheckBoxandroid:id="@+id/check_all"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_marginLeft="10dp"android:text="全选" /><!--android:layout_centerVertical="true"表示在此布局中(高)居中显示--><TextViewandroid:id="@+id/goods_sum_price"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_marginLeft="20dp"android:layout_toRightOf="@+id/check_all"android:textColor="#00f"android:text="价格：" /><Buttonandroid:id="@+id/but_jie"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_toRightOf="@+id/goods_sum_price"android:layout_marginLeft="200dp"android:text="结算"/></RelativeLayout></LinearLayout>

add_stu.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="#ddd"android:orientation="horizontal"android:padding="10dp"><CheckBoxandroid:id="@+id/child_check"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="15dp" /><ImageViewandroid:id="@+id/image_cc"android:layout_width="100dp"android:layout_height="wrap_content"android:layout_toRightOf="@+id/child_check"android:src="@mipmap/ic_launcher" /><TextViewandroid:id="@+id/text_ttt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="-3dp"android:layout_toRightOf="@+id/image_cc"android:padding="10dp"android:text="aa" /><TextViewandroid:id="@+id/text_price"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@+id/text_ttt"android:layout_marginTop="10dp"android:layout_toRightOf="@+id/image_cc"android:padding="3dp"android:text="价格" /><bawei.com.yuekaodemo3.wight.MyLayoutandroid:id="@+id/add_sub"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_alignParentBottom="true"android:layout_marginBottom="20dp"android:layout_marginRight="20dp">
</bawei.com.yuekaodemo3.wight.MyLayout></RelativeLayout>

child_item.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:orientation="vertical"><CheckBoxandroid:id="@+id/g_checkbox"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="CheckBox"android:focusable="false"/></LinearLayout>

group_item.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:orientation="horizontal"><TextViewandroid:id="@+id/add_jian"android:layout_width="30dp"android:layout_height="30dp"android:focusable="false"android:gravity="center"android:text="-"android:textSize="22sp" /><TextViewandroid:id="@+id/num"android:layout_width="wrap_content"android:layout_height="30dp"android:focusable="false"android:gravity="center"android:text="1000"android:textSize="22sp" /><TextViewandroid:id="@+id/add_jia"android:layout_width="30dp"android:layout_height="30dp"android:focusable="false"android:gravity="center"android:text="+"android:textSize="22sp" /></LinearLayout>

adapter

package bawei.com.yuekaodemo3.adapter;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 com.bumptech.glide.Glide;import java.util.ArrayList;
import java.util.List;import bawei.com.yuekaodemo3.R;
import bawei.com.yuekaodemo3.bean.Goods;
import bawei.com.yuekaodemo3.bean.Result;
import bawei.com.yuekaodemo3.bean.Shop;
import bawei.com.yuekaodemo3.wight.MyLayout;public class CarAdapter extends BaseExpandableListAdapter {private List<Shop> mList = new ArrayList<>();private TotalPriceLister priceLister;//实例化自定义接口public void setTotalPriceLister(TotalPriceLister totalPriceLister) {this.priceLister = totalPriceLister;}// 点击全选 则调用次方法public void checkAll(boolean is) {for (int i = 0; i < mList.size(); i++) {Shop shop = mList.get(i);shop.setCheck(is);// 设置for (int j = 0; j < shop.getList().size(); j++) {Goods goods = shop.getList().get(j);goods.setSelected(is?1:0);//设置选中状态}}notifyDataSetChanged();// 刷新数据calculatePrice();//计算总价}// 自定义接口public interface TotalPriceLister{void totalprice(double totalprice);void success(List<Shop> data);void fail(Result result);}public void addAll(List<Shop> list){if (list != null) {mList.addAll(list);// 添加数据}}@Overridepublic int getGroupCount() {return mList.size();}@Overridepublic int getChildrenCount(int groupPosition) {return mList.get(groupPosition).getList().size();}@Overridepublic Object getGroup(int groupPosition) {return mList.get(groupPosition);}@Overridepublic Object getChild(int groupPosition, int childPosition) {return mList.get(groupPosition).getList().get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic boolean hasStableIds() {return false;}@Overridepublic View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {GroupHolder groupHolder = null;if (convertView == null) {convertView = View.inflate(parent.getContext(), R.layout.child_item, null);groupHolder = new GroupHolder();groupHolder.checkBox = convertView.findViewById(R.id.g_checkbox);convertView.setTag(groupHolder);} else {groupHolder = (GroupHolder) convertView.getTag();}final Shop shop = mList.get(groupPosition);// 得到此商铺groupHolder.checkBox.setText(shop.getSellerName());// 设置商品的名字groupHolder.checkBox.setChecked(shop.isCheck());// 这是商铺的选中状态groupHolder.checkBox.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 防治点击事件与选中发生冲突CheckBox checkBox= (CheckBox) v;shop.setCheck(checkBox.isChecked());// 设置商品的选中状态List<Goods> goodsList = mList.get(groupPosition).getList();// 得到商品的信息for (int i = 0; i < goodsList.size(); i++) {goodsList.get(i).setSelected(checkBox.isChecked() ? 1 : 0);// 设置是否选中}// 更新适配器notifyDataSetChanged();// 计算价格calculatePrice();}});return convertView;}/*** 计算总价格*/private void calculatePrice() {double totalprice=0;for (int i = 0; i < mList.size(); i++) {Shop shop = mList.get(i);for (int j = 0; j < shop.getList().size(); j++) {Goods goods = shop.getList().get(j);if (goods.getSelected() == 1) {// 是选中状态的话则计算进去totalprice = totalprice +goods.getNum()*goods.getPrice();}}}// 判断if (priceLister != null) {priceLister.totalprice(totalprice);// 将值利用接口回调传回Activity进行展示}}class GroupHolder {CheckBox checkBox;// 这是二级列表的第一级}@Overridepublic View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {ChildHolder childHolder=null;if (convertView == null) {childHolder = new ChildHolder();convertView = View.inflate(parent.getContext(),R.layout.add_stu,null);childHolder.addSub= convertView.findViewById(R.id.add_sub);childHolder.check = convertView.findViewById(R.id.child_check);childHolder.image = convertView.findViewById(R.id.image_cc);childHolder.price = convertView.findViewById(R.id.text_price);childHolder.text = convertView.findViewById(R.id.text_ttt);convertView.setTag(childHolder);}else{childHolder= (ChildHolder) convertView.getTag();}// 得到单个商品final Goods goods = mList.get(groupPosition).getList().get(childPosition);childHolder.text.setText(goods.getTitle());childHolder.price.setText(goods.getPrice()+"");// 单价// 点击选中，计算价格childHolder.check.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 防治点击事件与选中发生冲突CheckBox checkBox = (CheckBox) v;goods.setSelected(checkBox.isChecked()?1:0);//设置此商品是否选中// 计算价格calculatePrice();}});// 设置商品的复选框if (goods.getSelected()==0) {childHolder.check.setChecked(false);}else{childHolder.check.setChecked(true);}//设置图片String images = goods.getImages();//分割String[] split = images.split("\\|");if (split .length>0) {Glide.with(parent.getContext()).load(split[0].replace("https","http")).into(childHolder.image);}// 设置次商品的数量childHolder.addSub.setCount(goods.getNum());childHolder.addSub.setAddSubListener(new MyLayout.AddSubListener() {@Overridepublic void addSub(int number) {goods.setNum(number);//设置数量calculatePrice();// 计算价格}});return convertView;}class ChildHolder {CheckBox check;TextView text;TextView price;ImageView image;MyLayout addSub;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return false;}}

bean

package bawei.com.yuekaodemo3.bean;public class Goods {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;}
}

package bawei.com.yuekaodemo3.bean;public class Result<T> {int code;String msg;T data;public int getCode() {return code;}public void setCode(int code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public T getData() {return data;}public void setData(T data) {this.data = data;}}

package bawei.com.yuekaodemo3.bean;import java.util.List;public class Shop {List<Goods> list;String sellerName;String sellerid;// 自己添加的 为了判断复选框是否选中boolean check;public void setCheck(boolean check) {this.check = check;}public boolean isCheck() {return check;}public List<Goods> getList() {return list;}public void setList(List<Goods> list) {this.list = 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;}}

model

package bawei.com.yuekaodemo3.model;import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;import java.lang.reflect.Type;
import java.util.List;import bawei.com.yuekaodemo3.bean.Result;
import bawei.com.yuekaodemo3.bean.Shop;public class CartModel {private static Result result;public static Result goodsList() {// 可以调用okhttp  因接口容易崩溃直接将数据取了出来
//        String resultString = HttpUtils.get("http://www.zhaoapi.cn/product/getCarts?uid=71");String resultString = "{\"msg\":\"请求成功\",\"code\":\"0\",\"data\":[{\"list\":[],\"sellerName\":\"\",\"sellerid\":\"0\"},{\"list\":[{\"bargainPrice\":111.99,\"createtime\":\"2017-10-14T21:48:08\",\"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\":11,\"price\":8989.0,\"pscid\":1,\"selected\":0,\"sellerid\":4,\"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4\",\"sellerid\":\"4\"},{\"list\":[{\"bargainPrice\":111.99,\"createtime\":\"2017-10-03T23:43:53\",\"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\":1,\"pid\":13,\"price\":465.0,\"pscid\":1,\"selected\":0,\"sellerid\":6,\"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6\",\"sellerid\":\"6\"},{\"list\":[{\"bargainPrice\":11800.0,\"createtime\":\"2017-10-14T21:38:26\",\"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\":3,\"pid\":63,\"price\":10000.0,\"pscid\":40,\"selected\":0,\"sellerid\":7,\"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7\",\"sellerid\":\"7\"},{\"list\":[{\"bargainPrice\":399.0,\"createtime\":\"2017-10-03T23:53:28\",\"detailUrl\":\"https:\\/\\/item.m.jd.com\\/product\\/1439822107.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends\",\"images\":\"https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t5887\\/201\\/859509257\\/69994\\/6bde9bf6\\/59224c24Ne854e14c.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t5641\\/233\\/853609022\\/57374\\/5c73d281\\/59224c24N3324d5f4.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t5641\\/233\\/853609022\\/57374\\/5c73d281\\/59224c24N3324d5f4.jpg!q70.jpg\",\"num\":1,\"pid\":87,\"price\":888.0,\"pscid\":85,\"selected\":0,\"sellerid\":8,\"subhead\":\"满2件，总价打6.50折\",\"title\":\"Gap男装 休闲舒适简约水洗五袋直筒长裤紧身牛仔裤941825 深灰色 33\\/32(175\\/84A)\"},{\"bargainPrice\":3455.0,\"createtime\":\"2017-10-03T23:53:28\",\"detailUrl\":\"https:\\/\\/item.m.jd.com\\/product\\/12224420750.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends\",\"images\":\"https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t9106\\/106\\/1785172479\\/537280\\/253bc0ab\\/59bf78a7N057e5ff7.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t9106\\/106\\/1785172479\\/537280\\/253bc0ab\\/59bf78a7N057e5ff7.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8461\\/5\\/1492479653\\/68388\\/7255e013\\/59ba5e84N91091843.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8461\\/5\\/1492479653\\/68388\\/7255e013\\/59ba5e84N91091843.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8803\\/356\\/1478945529\\/489755\\/2a163ace\\/59ba5e84N7bb9a666.jpg!q70.jpg\",\"num\":2,\"pid\":52,\"price\":666.0,\"pscid\":39,\"selected\":0,\"sellerid\":8,\"subhead\":\"【现货新品抢购】全面屏2.0震撼来袭，骁龙835处理器，四曲面陶瓷机\",\"title\":\"小米（MI） 小米MIX2 手机 黑色 全网通 (6GB+64GB)【标配版】\"}],\"sellerName\":\"商家8\",\"sellerid\":\"8\"},{\"list\":[{\"bargainPrice\":11800.0,\"createtime\":\"2017-10-14T21:48:08\",\"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\":3,\"pid\":65,\"price\":12000.0,\"pscid\":40,\"selected\":0,\"sellerid\":9,\"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\"},{\"bargainPrice\":2999.0,\"createtime\":\"2017-10-14T21:48:08\",\"detailUrl\":\"https:\\/\\/item.m.jd.com\\/product\\/2385655.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends\",\"images\":\"https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t2068\\/298\\/2448145915\\/157953\\/7be197df\\/56d51a42Nd86f1c8e.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t2437\\/128\\/1687178395\\/117431\\/bcc190c1\\/56d3fcbaNb2963d21.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t2467\\/222\\/2263160610\\/95597\\/927b8a2f\\/56d3eafeNdecebeb6.jpg!q70.jpg\",\"num\":2,\"pid\":53,\"price\":777.0,\"pscid\":39,\"selected\":0,\"sellerid\":9,\"subhead\":\"Super AMOLED三星双曲面2K 屏，支持无线充电！\",\"title\":\"三星 Galaxy S7 edge（G9350）4GB+32GB 铂光金 移动联通电信4G手机 双卡双待\"},{\"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\":1,\"pid\":16,\"price\":199.0,\"pscid\":1,\"selected\":0,\"sellerid\":9,\"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9\",\"sellerid\":\"9\"},{\"list\":[{\"bargainPrice\":11800.0,\"createtime\":\"2017-10-14T21:38:26\",\"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\":3,\"pid\":66,\"price\":13000.0,\"pscid\":40,\"selected\":0,\"sellerid\":10,\"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\"},{\"bargainPrice\":159.0,\"createtime\":\"2017-10-14T21:49:15\",\"detailUrl\":\"https:\\/\\/item.m.jd.com\\/product\\/5061723.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends\",\"images\":\"https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8716\\/197\\/1271594444\\/173291\\/2f40bb4f\\/59b743bcN8509428e.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8347\\/264\\/1286771527\\/92188\\/5cf5ec04\\/59b7420fN65378e9e.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t7363\\/165\\/3000956253\\/190883\\/179a372\\/59b743bfNd0c79d93.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t7399\\/112\\/2935531768\\/183594\\/b77c7d4a\\/59b7441aNc3d40133.jpg!q70.jpg\",\"num\":5,\"pid\":99,\"price\":2100.0,\"pscid\":112,\"selected\":0,\"sellerid\":10,\"subhead\":\"针织针织闪闪闪亮你的眼\",\"title\":\"维迩旎 2017秋冬新款长袖针织连衣裙韩版气质中长款名媛包臀A字裙 zx179709 黑色 XL\"},{\"bargainPrice\":111.99,\"createtime\":\"2017-10-03T23:53:28\",\"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\":2,\"pid\":17,\"price\":299.0,\"pscid\":1,\"selected\":0,\"sellerid\":10,\"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10\",\"sellerid\":\"10\"},{\"list\":[{\"bargainPrice\":159.0,\"createtime\":\"2017-10-14T21:49:15\",\"detailUrl\":\"https:\\/\\/item.m.jd.com\\/product\\/5061723.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends\",\"images\":\"https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8716\\/197\\/1271594444\\/173291\\/2f40bb4f\\/59b743bcN8509428e.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t8347\\/264\\/1286771527\\/92188\\/5cf5ec04\\/59b7420fN65378e9e.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t7363\\/165\\/3000956253\\/190883\\/179a372\\/59b743bfNd0c79d93.jpg!q70.jpg|https:\\/\\/m.360buyimg.com\\/n0\\/jfs\\/t7399\\/112\\/2935531768\\/183594\\/b77c7d4a\\/59b7441aNc3d40133.jpg!q70.jpg\",\"num\":1,\"pid\":100,\"price\":2200.0,\"pscid\":112,\"selected\":0,\"sellerid\":11,\"subhead\":\"针织针织闪闪闪亮你的眼\",\"title\":\"维迩旎 2017秋冬新款长袖针织连衣裙韩版气质中长款名媛包臀A字裙 zx179709 黑色 XL\"},{\"bargainPrice\":22.9,\"createtime\":\"2017-10-14T21:38:26\",\"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\":5,\"pid\":34,\"price\":9.0,\"pscid\":2,\"selected\":0,\"sellerid\":11,\"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\"},{\"bargainPrice\":111.99,\"createtime\":\"2017-10-14T21:48:08\",\"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\":2,\"pid\":18,\"price\":399.0,\"pscid\":1,\"selected\":0,\"sellerid\":11,\"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11\",\"sellerid\":\"11\"},{\"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\":3,\"pid\":19,\"price\":499.0,\"pscid\":1,\"selected\":0,\"sellerid\":12,\"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12\",\"sellerid\":\"12\"},{\"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\":3,\"pid\":1,\"price\":118.0,\"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\"}]}";try {Gson gson = new Gson();Type type = new TypeToken<Result<List<Shop>>>() {}.getType();result = gson.fromJson(resultString, type);return result;} catch (Exception e) {}return result;}}

presenter

package bawei.com.yuekaodemo3.presenter;import android.os.Handler;
import android.os.Looper;
import android.os.Message;import bawei.com.yuekaodemo3.bean.Result;
import bawei.com.yuekaodemo3.view.DataCall;public abstract class BasePresenter {DataCall dataCall;public BasePresenter(DataCall dataCall){this.dataCall = dataCall;}Handler mHandler = new Handler(Looper.getMainLooper()) {@Overridepublic void handleMessage(Message msg) {Result result = (Result) msg.obj;if (result.getCode()==0){dataCall.success(result.getData());}else{dataCall.fail(result);}}};public void requestData(final Object...args){new Thread(new Runnable() {@Overridepublic void run() {Message message = mHandler.obtainMessage();message.obj = getData(args);mHandler.sendMessage(message);}}).start();}protected abstract Result getData(Object...args);public void unBindCall(){this.dataCall = null;//防治内存泄露}}

package bawei.com.yuekaodemo3.presenter;import bawei.com.yuekaodemo3.bean.Result;
import bawei.com.yuekaodemo3.model.CartModel;
import bawei.com.yuekaodemo3.view.DataCall;public class CartPresenter extends BasePresenter {public CartPresenter(DataCall dataCall) {super(dataCall);}@Overrideprotected Result getData(Object... args) {Result result = CartModel.goodsList();//调用网络请求获取数据return result;}}

utils

package bawei.com.yuekaodemo3.utils;import java.io.IOException;
import java.util.concurrent.TimeUnit;import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;public class HttpUtils {public static String get(String urlString) {// 添加日志拦截器HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();OkHttpClient okHttpClient = new OkHttpClient.Builder().connectTimeout(20, TimeUnit.SECONDS)//连接超时.readTimeout(20, TimeUnit.SECONDS)//读取超时.callTimeout(20, TimeUnit.SECONDS)//呼叫超时.addInterceptor(loggingInterceptor)// 日志拦截器.build();Request request = new Request.Builder().url(urlString).get().build();try {Response response = okHttpClient.newCall(request).execute();return response.body().string();} catch (IOException e) {e.printStackTrace();}return "";}//okhttp使用单例模式private static OkHttpClient singleton;//非常有必要，要不此类还是可以被new，但是无法避免反射，好恶心private HttpUtils(){}public static OkHttpClient getInstance() {if (singleton == null){synchronized (HttpUtils.class){if (singleton == null){singleton = new OkHttpClient();}}}return singleton;}}

view

package bawei.com.yuekaodemo3.view;import bawei.com.yuekaodemo3.bean.Result;public interface DataCall<T> {// 成功void success(T data);// 失败void fail(Result result);
}

wight

package bawei.com.yuekaodemo3.wight;import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;import java.util.List;import bawei.com.yuekaodemo3.R;
import bawei.com.yuekaodemo3.adapter.CarAdapter;
import bawei.com.yuekaodemo3.bean.Result;
import bawei.com.yuekaodemo3.bean.Shop;
import bawei.com.yuekaodemo3.view.DataCall;
import bawei.com.yuekaodemo3.presenter.CartPresenter;public class MainActivity extends AppCompatActivity implements CarAdapter.TotalPriceLister, DataCall<List<Shop>> {private TextView mSunPirce;private CheckBox mCheck_All;Button but_jie;private CarAdapter carAdapter;private ExpandableListView mGoodsList;private CartPresenter cartPresenter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 找到控件mSunPirce = findViewById(R.id.goods_sum_price);mCheck_All = findViewById(R.id.check_all);but_jie=findViewById(R.id.but_jie);mGoodsList = findViewById(R.id.list_car);// 没有箭头mGoodsList.setGroupIndicator(null);// 让group不能被点击mGoodsList.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {@Overridepublic boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {return true;}});//点击全选按钮mCheck_All.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {carAdapter.checkAll(isChecked);//全部选中}});// 得到适配器对象carAdapter = new CarAdapter();carAdapter.setTotalPriceLister(this);// 回调总金额// 设置适配器mGoodsList.setAdapter(carAdapter);cartPresenter = new CartPresenter(this);// 调用P层cartPresenter.requestData();// 使用MVP模式}@Overridepublic void totalprice(double totalprice) {// 设置总金额mSunPirce.setText(String.valueOf(totalprice));}@Overridepublic void success(List<Shop> data) {// 添加数据carAdapter.addAll(data);// 默认展开 所有数据int size = data.size();for (int i = 0; i < size; i++) {mGoodsList.expandGroup(i);// 展开}// 更新数据carAdapter.notifyDataSetChanged();}@Overridepublic void fail(Result result) {cartPresenter.unBindCall();// 防治内存泄露Toast.makeText(this, "" + result.getMsg(), Toast.LENGTH_SHORT).show();}}

package bawei.com.yuekaodemo3.wight;import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;import bawei.com.yuekaodemo3.R;public class MyLayout extends LinearLayout implements View.OnClickListener{private TextView jian;private TextView jia;private TextView num;private AddSubListener addSubListener;// 实例化接口的变量public void setAddSubListener(AddSubListener addSubListener) {this.addSubListener = addSubListener;}public MyLayout(Context context) {super(context);initView();}public MyLayout(Context context, AttributeSet attrs) {super(context, attrs);initView();}public MyLayout(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initView();}private void initView() {
//        第三个参数写成thisView view = View.inflate(getContext(), R.layout.group_item,this);jian = view.findViewById(R.id.add_jian);jia = view.findViewById(R.id.add_jia);num = view.findViewById(R.id.num);jia.setOnClickListener(this);jian.setOnClickListener(this);}@Overridepublic void onClick(View v) {// 得到数量的值int number = Integer.parseInt(num.getText().toString());switch (v.getId()){case R.id.add_jia:number++;num.setText(number+"");break;case R.id.add_jian:if (number == 0) {Toast.makeText(getContext(), "数量不可小于0", Toast.LENGTH_SHORT).show();return;}number--;num.setText(number+"");break;}if (addSubListener!=null) {addSubListener.addSub(number);}}public void setCount(int count) {num.setText(count+"");}// 自定义接口public interface AddSubListener{void addSub(int number);}}

依赖

implementation 'com.google.code.gson:gson:2.8.5'implementation 'com.squareup.okhttp3:okhttp:3.12.0'implementation 'com.github.bumptech.glide:glide:4.8.0'implementation 'com.squareup.okhttp3:logging-interceptor:3.12.0'

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