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最新推荐文章于 2022-03-27 00:10:39 发布

原创最新推荐文章于 2022-03-27 00:10:39 发布 · 293 阅读

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1.添加网络权限

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

2.添加依赖

compile 'com.google.code.gson:gson:2.8.2'
compile 'com.github.bumptech.glide:glide:3.5.2'
compile 'com.jcodecraeer:xrecyclerview:1.3.2'
compile 'com.android.support:recyclerview-v7:27+'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.squareup.okio:okio:1.11.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'
implementation 'com.github.bumptech.glide:glide:3.7.0'
implementation 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

3.创建布局

在values文件夹下创建 dimens.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="left_space_pading">12dp</dimen>
</resources>

activity_main

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

   <ExpandableListView
       android:id="@+id/el_cart"
       android:layout_width="match_parent"
       android:layout_height="0dp"
       android:layout_weight="9"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#eeeeee"
        android:orientation="horizontal">
        <CheckBox
            android:id="@+id/cb_care_all_select"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="全选"/>
        <TextView
            android:id="@+id/tv_cart_total_price"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:paddingLeft="20dp"
            android:text="合计:￥0.00"/>
        <Button
            android:id="@+id/btn_cart_pay"
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="去结算（0）"/>
    </LinearLayout>

</LinearLayout>

add_remove_view_layput

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="60dp"
    android:layout_height="30dp"
    android:padding="2dp"
    android:gravity="center_vertical"
    android:background="#99000000"
    android:layout_gravity="center_vertical"
    >
    <TextView
        android:background="#ffffff"
        android:layout_weight="1"
        android:id="@+id/sub_tv"
        android:gravity="center"
        android:text="-"
        android:textSize="16sp"
        android:layout_width="0dp"
        android:layout_height="match_parent" />
    <TextView
        android:text="1"
        android:layout_marginLeft="2dp"
        android:background="#ffffff"
        android:layout_weight="1"
        android:id="@+id/product_number_tv"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:gravity="center"
        />
    <TextView
        android:layout_marginLeft="2dp"
        android:background="#ffffff"
        android:layout_weight="1"
        android:id="@+id/add_tv"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:textSize="16sp"
        android:text="+"/>
</LinearLayout>

item_cart_parent

<?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="60dp"
    android:gravity="center_vertical"
    android:paddingLeft="@dimen/textandiconmargin">
    <CheckBox
        android:id="@+id/seller_cb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/seller_name_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp" />
</LinearLayout>

item_cart_child

<?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="120dp"
    android:gravity="center_vertical"
    android:paddingLeft="@dimen/left_space_pading">

    <CheckBox
        android:id="@+id/child_cb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <ImageView
        android:id="@+id/product_icon_iv"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_marginLeft="20dp"
        android:scaleType="centerCrop"
        android:src="@color/colorPrimary" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/left_space_pading"
        android:layout_weight="1"
        android:orientation="vertical">

        <TextView
            android:id="@+id/product_title_name_tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:maxLines="2"
            android:text="商品标题" />

        <TextView
            android:id="@+id/product_price_tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="¥0.0" />
    </LinearLayout>
    <com.example.thinkpad.wsjgowu.MyAddSubView
        android:id="@+id/add_remove_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="10dp" />
</LinearLayout>

4。创建OkhttpUtils实现封装

package com.example.thinkpad.wsjgowu;

import android.os.Handler;
import android.os.Looper;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;

public class OkhttpUtils {
    private static OkhttpUtils mOkhtttpUtils;
    private OkHttpClient mOkHttpClien;
    private final Handler mHandler;

    private OkhttpUtils() {

        HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
        httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

        Map<String, String> map = new HashMap<>();
        map.put("source", "android");

        PublicParamInterceptor publicParamInterceptor = new PublicParamInterceptor(map);

        //创建一个主线程的handler
        mHandler = new Handler(Looper.getMainLooper());
        mOkHttpClien = new OkHttpClient.Builder()
                .connectTimeout(5000, TimeUnit.MILLISECONDS)
                .readTimeout(5000, TimeUnit.MILLISECONDS)
                .writeTimeout(5000, TimeUnit.MILLISECONDS)
                .addInterceptor(httpLoggingInterceptor)
                .addInterceptor(publicParamInterceptor)
                .build();
    }


    public static OkhttpUtils getInstance() {
        if (mOkhtttpUtils == null) {
            synchronized (OkhttpUtils.class) {
                if (mOkhtttpUtils == null) {
                    return mOkhtttpUtils = new OkhttpUtils();
                }
            }
        }
        return mOkhtttpUtils;
    }

    public void doGet(String url, final OkCallback okCallback) {
        Request request = new Request.Builder()
                .get()
                .url(url)
                .build();

        final Call call = mOkHttpClien.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                if (okCallback != null) {

                    //切换到主线程
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            okCallback.onFailure(e);
                        }
                    });

                }
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {

                try {
                    if (response != null && response.isSuccessful()) {
                        final String json = response.body().string();
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                if (okCallback != null) {
                                    okCallback.onResponse(json);
                                    return;
                                }

                            }
                        });
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        });
    }

    public void doPost(String url, Map<String, String> map, final OkCallback okCallback) {

        FormBody.Builder builder = new FormBody.Builder();
        if (map != null) {
            for (String key : map.keySet()) {
                builder.add(key, map.get(key));
            }
        }
        FormBody formBody = builder.build();
        Request request = new Request.Builder()
                .post(formBody)
                .url(url)
                .build();
        final Call call = mOkHttpClien.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                if (okCallback != null) {

                    //切换到主线程
                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            okCallback.onFailure(e);
                        }
                    });

                }
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {

                try {
                    if (response != null && response.isSuccessful()) {
                        final String json = response.body().string();
                        mHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                if (okCallback != null) {
                                    okCallback.onResponse(json);
                                    return;
                                }
                            }
                        });
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (okCallback != null) {
                    okCallback.onFailure(new Exception("网络异常"));
                }

            }
        });
    }

    public interface OkCallback {
        void onFailure(Exception e);

        void onResponse(String json);
    }


    //自定义一个拦截器，封装公共请求参数
    public class PublicParamInterceptor implements Interceptor {
        Map<String, String> paramMap = new HashMap<>();

        public PublicParamInterceptor(Map<String, String> paramMap) {
            this.paramMap = paramMap;
        }

        @Override

        public Response intercept(Chain chain) throws IOException {
            //拿到原来的request
            Request oldRequest = chain.request();
            //拿到请求的url
            String url = oldRequest.url().toString();
            //判断是GET还是POST请求
            if (oldRequest.method().equalsIgnoreCase("GET")) {
                if (paramMap != null && paramMap.size() > 0) {
                    StringBuilder urlBuilder = new StringBuilder(url);
                    //拼接公共请求参数
                    for (Map.Entry<String, String> entry : paramMap.entrySet()) {
                        urlBuilder.append("&" + entry.getKey() + "=" + entry.getValue());
                    }
                    url = urlBuilder.toString();
                    //如果之前的url没有？号，我们需要手动给他添加一个？号
                    if (!url.contains("?")) {
                        url = url.replaceFirst("&", "?");
                    }

                    //依据原来的request构造一个新的request,
                    Request request = oldRequest.newBuilder()
                            .url(url)
                            .build();
                    return chain.proceed(request);
                }
            } else {
                if (paramMap != null && paramMap.size() > 0) {
                    RequestBody body = oldRequest.body();
                    if (body != null && body instanceof FormBody) {
                        FormBody formBody = (FormBody) body;
                        //1.把原来的的body里面的参数添加到新的body中
                        FormBody.Builder builder = new FormBody.Builder();
                        //为了防止重复添加相同的key和value
                        Map<String, String> temMap = new HashMap<>();
                        for (int i = 0; i < formBody.size(); i++) {
                            builder.add(formBody.encodedName(i), formBody.encodedValue(i));
                            temMap.put(formBody.encodedName(i), formBody.encodedValue(i));
                        }
                        //2.把公共请求参数添加到新的body中
                        for (Map.Entry<String, String> entry : paramMap.entrySet()) {
                            if(!temMap.containsKey(entry.getKey())){
                                builder.add(entry.getKey(), entry.getValue());
                            }
                        }
                        FormBody newFormBody = builder.build();

                        //依据原来的request构造一个新的request,
                        Request newRequest = oldRequest.newBuilder()
                                .post(newFormBody)
                                .build();
                        return chain.proceed(newRequest);
                    }

                }
            }

            return chain.proceed(oldRequest);
        }
    }
}

5.bean类

package com.example.thinkpad.wsjgowu;

import java.util.List;

public class CartInfo {
    /**
     * msg : 请求成功
     * code : 0
     * data : [{"list":[{"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":1,"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":6666,"createtime":"2017-10-10T16:01:31","detailUrl":"https://item.m.jd.com/product/5089273.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t8284/363/1326459580/71585/6d3e8013/59b857f2N6ca75622.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9346/182/1406837243/282106/68af5b54/59b8480aNe8af7f5c.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8434/54/1359766007/56140/579509d9/59b85801Nfea207db.jpg!q70.jpg","num":1,"pid":46,"price":234,"pscid":39,"selected":0,"sellerid":2,"subhead":"【iPhone新品上市】新一代iPhone，让智能看起来更不一样","title":"Apple iPhone 8 Plus (A1864) 64GB 金色 移动联通电信4G手机"}],"sellerName":"商家2","sellerid":"2"},{"list":[{"bargainPrice":399,"createtime":"2017-10-14T21:38:26","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":82,"price":333,"pscid":85,"selected":0,"sellerid":3,"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":1599,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/1993026402.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t5863/302/8961270302/97126/41feade1/5981c81cNc1b1fbef.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7003/250/1488538438/195825/53bf31ba/5981c57eN51e95176.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5665/100/8954482513/43454/418611a9/5981c57eNd5fc97ba.jpg!q70.jpg","num":1,"pid":47,"price":111,"pscid":39,"selected":0,"sellerid":3,"subhead":"碳黑色 32GB 全网通 官方标配   1件","title":"锤子 坚果Pro 特别版 巧克力色 酒红色 全网通 移动联通电信4G手机 双卡双待 碳黑色 32GB 全网通"}],"sellerName":"商家3","sellerid":"3"},{"list":[{"bargainPrice":399,"createtime":"2017-10-14T21:38:26","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":83,"price":444,"pscid":85,"selected":0,"sellerid":4,"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)"}],"sellerName":"商家4","sellerid":"4"},{"list":[{"bargainPrice":399,"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":84,"price":555,"pscid":85,"selected":0,"sellerid":5,"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)"}],"sellerName":"商家5","sellerid":"5"},{"list":[{"bargainPrice":399,"createtime":"2017-10-14T21:38:26","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":85,"price":666,"pscid":85,"selected":0,"sellerid":6,"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":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":62,"price":15999,"pscid":40,"selected":0,"sellerid":6,"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6","sellerid":"6"},{"list":[{"bargainPrice":399,"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":86,"price":777,"pscid":85,"selected":0,"sellerid":7,"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":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":1,"pid":30,"price":688,"pscid":2,"selected":0,"sellerid":7,"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7","sellerid":"7"},{"list":[{"bargainPrice":399,"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,"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)"}],"sellerName":"商家8","sellerid":"8"},{"list":[{"bargainPrice":399,"createtime":"2017-10-14T21:38:26","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":2,"pid":88,"price":999,"pscid":85,"selected":0,"sellerid":9,"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)"}],"sellerName":"商家9","sellerid":"9"},{"list":[{"bargainPrice":22.9,"createtime":"2017-10-03T23:43:53","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":33,"price":988,"pscid":2,"selected":0,"sellerid":10,"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10","sellerid":"10"},{"list":[{"bargainPrice":3455,"createtime":"2017-10-14T21:38:26","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":10,"pid":56,"price":99,"pscid":39,"selected":0,"sellerid":12,"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":1,"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":4,"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"},{"list":[{"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":1,"pid":3,"price":198,"pscid":1,"selected":0,"sellerid":19,"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19","sellerid":"19"},{"list":[{"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":1,"pid":6,"price":7.99,"pscid":1,"selected":1,"sellerid":22,"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22","sellerid":"22"}]
     */

    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":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":1,"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 : 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 : 1
             * 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
             */

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

            public float getBargainPrice() {
                return bargainPrice;
            }

            public void setBargainPrice(float 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 float getPrice() {
                return price;
            }

            public void setPrice(float 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;
            }
        }
    }
}

6.自定义view的实现

package com.example.thinkpad.wsjgowu;

import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

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

public class MyAddSubView extends LinearLayout{
    //获取控件id
    @BindView(R.id.sub_tv)
    TextView subTv;
    @BindView(R.id.product_number_tv)
    TextView productNumberTv;
    @BindView(R.id.add_tv)
    TextView addTv;
    private int number = 1;
  public MyAddSubView(Context context) {
      this(context,null);
    }

    public MyAddSubView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        View view = inflate(context, R.layout.add_remove_view_layout, this);
        //必须初始化
        ButterKnife.bind(view);
  }
    @OnClick({R.id.sub_tv,R.id.add_tv})
    public  void  onViewClicked(View view){
        switch (view.getId()){
            //点击减号
            //在购买数量大于1的时候，每点击一次就减一，并付给数量值
            case R.id.sub_tv:
                if(number>1){
                    --number;
                    //给商品数量赋值
                    productNumberTv.setText(number+"");
                    if(onNumberChangeListener!=null){
                        onNumberChangeListener.onNumberChange(number);
                    }

                }else{
                    Toast.makeText(getContext(),"不能在少了",Toast.LENGTH_LONG).show();
                }
                break;
                //点击加号
            case R.id.add_tv:
                ++number;
                //给商品数量赋值
                productNumberTv.setText(number+"");
                if(onNumberChangeListener!=null){
                    //给接口传值
                    onNumberChangeListener.onNumberChange(number);
                }
                break;
        }
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    OnNumberChangeListener onNumberChangeListener;
    public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener) {
        this.onNumberChangeListener = onNumberChangeListener;
    }
    //通过接口告诉外面一共有几个商品
     interface  OnNumberChangeListener{
      void onNumberChange(int num);
     }

}

7，

MyAdapter

package com.example.thinkpad.wsjgowu;


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 java.util.List;
import butterknife.BindView;
import butterknife.ButterKnife;

public class MyAdapter extends BaseExpandableListAdapter {
    private List<CartInfo.DataBean> sellerData;
    public  MyAdapter(List<CartInfo.DataBean> sellerData){
           this.sellerData=sellerData;
    }

    @Override
    public int getGroupCount() {
        return sellerData==null?0:sellerData.size();
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return sellerData.get(groupPosition).getList()==null?0:sellerData.get(groupPosition).getList().size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return null;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return null;
    }

    @Override
    public long getGroupId(int groupPosition) {
        return 0;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return 0;
    }

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

    @Override
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
       //获取数据
        CartInfo.DataBean dataBean = sellerData.get(groupPosition);
        //创建商家类的viewhodel对象
        ParentViewHolde parentViewHolde;
        //判断当前方法中view为空的时候，将商家的布局添加进来
        if(convertView==null){
            //将商家的布局添加进来
            convertView= View.inflate(parent.getContext(),R.layout.item_cart_parent,null);
            //将填充慢的布局填充道商家的viewhodel中
            parentViewHolde=new ParentViewHolde(convertView);
            convertView.setTag(parentViewHolde);
        }else{
            //不为空就直接强转道 parentViewHolde中
            parentViewHolde  =(ParentViewHolde) convertView.getTag();
        }
        //为商家名字赋值
        parentViewHolde.sellNameTv.setText(dataBean.getSellerName());
        //根据商品名确定商家的checknox是否被选中
        boolean currentSellerAllProductSelected =  isCurrentSellerAllProductSelected(groupPosition);
         //设置商家checkBox的状态
        parentViewHolde.sellerCb.setChecked(currentSellerAllProductSelected);
         //设置商家checkBox的点击事件
         parentViewHolde.sellerCb.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 //判断接口是否为空
                   if (onCartListChangeListener!=null){
                       //不为空就把商家序列号传入
                       onCartListChangeListener.onSellerCheckedChange(groupPosition);
                   }
             }
         });
        return convertView;
    }
    //当前商家所有商品是否被选中
    boolean isCurrentSellerAllProductSelected(int groupPosition) {
        CartInfo.DataBean dataBean = sellerData.get(groupPosition);
        //获取商品的集合
        List<CartInfo.DataBean.ListBean> list = dataBean.getList();
        //循环商品集合
         for(CartInfo.DataBean.ListBean listBean :list){
                //只要一个没有被选中，商家就标记没选中
             //listBean.getSelected()  获取商品的选中状态进行判断
             if (listBean.getSelected() ==0){
                 return false;
             }
         }
        return true;
    }

    @Override
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        //获取商品的集合
        List<CartInfo.DataBean.ListBean> list = sellerData.get(groupPosition).getList();
        //商品
        CartInfo.DataBean.ListBean listBean = list.get(childPosition);
        ChildViewHodel childViewHodel;
        if(convertView ==null){
            convertView=View.inflate(parent.getContext(),R.layout.item_cart_child,null);
            childViewHodel = new ChildViewHodel(convertView);
            convertView.setTag(childViewHodel);
        }else{
             childViewHodel = (ChildViewHodel) convertView.getTag();
        }
         //商品名字
        childViewHodel.productTitleNameTv.setText(listBean.getTitle());
        //商品单价
        childViewHodel.productPriceTv.setText(listBean.getPscid()+"");
        //商品的checkBox状态
        childViewHodel.childCb.setChecked(listBean.getSelected() ==1);
        //商品的checkBox的点击事件
        childViewHodel.childCb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                  if (onCartListChangeListener!=null){
                      onCartListChangeListener.onProductCheckedChange(groupPosition,childPosition);
                  }
            }
        });
        childViewHodel.addRemoveView.setNumber(listBean.getNum());
        childViewHodel.addRemoveView.setOnNumberChangeListener(new MyAddSubView.OnNumberChangeListener() {
            @Override
            public void onNumberChange(int num) {
                //拿到上坪最新的数量
                if(onCartListChangeListener!=null){
                    onCartListChangeListener.onProductNumberChange(groupPosition,childPosition,num);

                }
            }
        });
        return convertView;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }
    //所有商品是否被选中
    public boolean isAllProductsSelected() {
        for (int i = 0; i < sellerData.size(); i++) {
            CartInfo.DataBean dataBean = sellerData.get(i);
            List<CartInfo.DataBean.ListBean> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                if (list.get(j).getSelected() == 0) {
                    return false;
                }
            }
        }
        return true;
    }

    //计算总价
    public float calculateTotalPrice() {
        float totalPrice = 0;
        for (int i = 0; i < sellerData.size(); i++) {
            CartInfo.DataBean dataBean = sellerData.get(i);
            List<CartInfo.DataBean.ListBean> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                //只要是选中状态
                if (list.get(j).getSelected() == 1) {
                    float price = list.get(j).getPrice();
                    int num = list.get(j).getNum();
                    totalPrice += price * num;
                }
            }
        }
        return totalPrice;
    }

    public int calculateTotalNumber() {
        int totalNumber = 0;
        for (int i = 0; i < sellerData.size(); i++) {
            CartInfo.DataBean dataBean = sellerData.get(i);
            List<CartInfo.DataBean.ListBean> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                //只要是选中状态
                if (list.get(j).getSelected() == 1) {
                    int num = list.get(j).getNum();
                    totalNumber += num;
                }
            }
        }
        return totalNumber;
    }


    //当商家得checkbox被点击得时候调用，设置当前商家得所有商品得状态
    public void changeCurrentSellerAllProductsStatus(int groupPosition, boolean isSelected) {
        CartInfo.DataBean dataBean = sellerData.get(groupPosition);
        List<CartInfo.DataBean.ListBean> listBeans = dataBean.getList();
        for (int i = 0; i < listBeans.size(); i++) {
            CartInfo.DataBean.ListBean listBean = listBeans.get(i);
            listBean.setSelected(isSelected ? 1 : 0);
        }
    }

    //当商品得checkbox被点击得时候调用，改变当前商品状态
    public void changeCurrentProductStatus(int groupPosition, int childPosition) {
        CartInfo.DataBean dataBean = sellerData.get(groupPosition);
        List<CartInfo.DataBean.ListBean> listBeans = dataBean.getList();
        CartInfo.DataBean.ListBean listBean = listBeans.get(childPosition);
        listBean.setSelected(listBean.getSelected() == 0 ? 1 : 0);
    }

    //当加减器被点击得时候调用，改变当前商品得数量
    public void changeCurrentProductNumber(int groupPosition, int childPosition, int number) {
        CartInfo.DataBean dataBean = sellerData.get(groupPosition);
        List<CartInfo.DataBean.ListBean> listBeans = dataBean.getList();
        CartInfo.DataBean.ListBean listBean = listBeans.get(childPosition);
        listBean.setNum(number);
    }

    //设置所有商品得状态
    public void changeAllProductsStatus(boolean selected) {
        for (int i = 0; i < sellerData.size(); i++) {
            CartInfo.DataBean dataBean = sellerData.get(i);
            List<CartInfo.DataBean.ListBean> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                list.get(j).setSelected(selected?1:0);
            }
        }
    }

    //商家数据的viewhodel
    class  ParentViewHolde{
        @BindView(R.id.seller_cb)
        CheckBox sellerCb;
        @BindView(R.id.seller_name_tv)
        TextView sellNameTv;
        ParentViewHolde(View view){
              ButterKnife.bind(this,view);
          }
    }
      class  ChildViewHodel{
          @BindView(R.id.child_cb)
          CheckBox childCb;
          @BindView(R.id.product_icon_iv)
          ImageView productIconIv;
          @BindView(R.id.product_title_name_tv)
          TextView productTitleNameTv;
          @BindView(R.id.product_price_tv)
          TextView productPriceTv;
          @BindView(R.id.add_remove_view)
          MyAddSubView addRemoveView;
          ChildViewHodel(View view){
              //进行绑定
              ButterKnife.bind(this,view);
          }
      }
    onCartListChangeListener onCartListChangeListener;

    public void setOnCartListChangeListener(MyAdapter.onCartListChangeListener onCartListChangeListener) {
        this.onCartListChangeListener = onCartListChangeListener;
    }

    //定义一个接口用来传递商家和商品 还有增减器的变化
    public  interface  onCartListChangeListener{
        //传递的商家
        void onSellerCheckedChange(int groupPostition);
        //传递精确的商品
        void onProductCheckedChange(int groupPosition, int childPosition);
        //精确商品的增减器的变化
        void onProductNumberChange(int groupPosition, int childPosition, int number);
    }
}

MainActivity

package com.example.thinkpad.wsjgowu;



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

import com.google.gson.Gson;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class MainActivity extends AppCompatActivity {
    @BindView(R.id.el_cart)
    ExpandableListView elCart;
    @BindView(R.id.cb_care_all_select)
    CheckBox cbCartAllSelect;
    @BindView(R.id.tv_cart_total_price)
    TextView tvCartTotalPrice;
    @BindView(R.id.btn_cart_pay)

    Button btnCartPay;
    private MyAdapter myAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        initData();
    }

    private void initData() {
          String url="https://www.zhaoapi.cn/product/getCarts";
        HashMap<String,String> map = new HashMap<>();
        map.put("uid","71");
        OkhttpUtils.getInstance().doPost(url, map, new OkhttpUtils.OkCallback() {
            @Override
            public void onFailure(Exception e) {
            }
            @Override
            public void onResponse(String json) {
                Gson gson = new Gson();
                CartInfo cartInfo = gson.fromJson(json, CartInfo.class);
                if("0".equalsIgnoreCase(cartInfo.getCode())){
                    List<CartInfo.DataBean> sellerData = cartInfo.getData();
                    //设置adaper
                    myAdapter = new MyAdapter(sellerData);
                    myAdapter.setOnCartListChangeListener(new MyAdapter.onCartListChangeListener() {
                        @Override
                        public void onSellerCheckedChange(int groupPosition) {
                            //商家被点击
                            boolean currentSellerAllProductSelected = myAdapter.isCurrentSellerAllProductSelected(groupPosition);
                            myAdapter.changeCurrentSellerAllProductsStatus(groupPosition, !currentSellerAllProductSelected);
                            myAdapter.notifyDataSetChanged();
                            //刷新底部数据
                            refreshSelectedAndTotalPriceAndTotalNumber();

                        }

                        @Override
                        public void onProductCheckedChange(int groupPosition, int childPosition) {
                            //点击商品得checkbox
                            myAdapter.changeCurrentProductStatus(groupPosition,childPosition);
                            myAdapter.notifyDataSetChanged();
                            //刷新底部数据
                            refreshSelectedAndTotalPriceAndTotalNumber();

                        }

                        @Override
                        public void onProductNumberChange(int groupPosition, int childPosition, int number) {
                            //当加减被点击
                            myAdapter.changeCurrentProductNumber(groupPosition,childPosition,number);
                            myAdapter.notifyDataSetChanged();
                            //刷新底部数据
                            refreshSelectedAndTotalPriceAndTotalNumber();

                            //联网更新网络上得商品数量
                        }
                    });
                    elCart.setAdapter(myAdapter);

                    //展开二级列表
                    for (int i=0;i<sellerData.size();i++){
                        elCart.expandGroup(i);
                    }
                    //刷新checkbox状态和总价和总数量
                    refreshSelectedAndTotalPriceAndTotalNumber();
                }
            }
        });

    }
    //刷新checkbox状态和总价和总数量
    private void refreshSelectedAndTotalPriceAndTotalNumber() {
        //去判断是否所有得商品都被选中
        boolean allProductsSelected = myAdapter.isAllProductsSelected();
        //设置给全选checkBox
        cbCartAllSelect.setChecked(allProductsSelected);//cbCartAllSelect

        //计算总价
        float totalPrice = myAdapter.calculateTotalPrice();
        tvCartTotalPrice.setText("总价 " + totalPrice);

        //计算总数量
        int totalNumber = myAdapter.calculateTotalNumber();
        btnCartPay.setText("去结算(" + totalNumber + ")");

    }

    @OnClick(R.id.cb_care_all_select)
    public void onViewClicked() {
        //底部全选按钮
        //时候所有得商品都被选中
        boolean allProductsSelected = myAdapter.isAllProductsSelected();
        myAdapter.changeAllProductsStatus(!allProductsSelected);
        myAdapter.notifyDataSetChanged();
        //刷新底部数据
        refreshSelectedAndTotalPriceAndTotalNumber();
    }
}