购物车之详情页面跳转至购物车

最新推荐文章于 2025-06-10 15:34:58 发布

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最新推荐文章于 2025-06-10 15:34:58 发布

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CC 4.0 BY-SA版权

文章标签：框架 logging mvp gson url

本文链接：https://blog.youkuaiyun.com/Striver_zhq/article/details/78836503

该博客介绍了如何在Android应用中实现在商品详情页面点击后跳转到购物车功能。详细讲解了依赖导入、MVP框架的使用，包括Api接口、HttpUtils类、自定义拦截器MyInterceptor类和接口回调类OnNetListener的实现。同时展示了Model层、DetailsService接口类和DetailsModel类的代码实现，以及如何处理商品数据和UI交互，如CheckBox的点击事件。

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首先依赖导入：

compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
compile 'com.google.code.gson:gson:2.8.2'
compile 'io.github.openfeign:feign-gson:9.5.1'
compile 'com.android.support:recyclerview-v7:24.0.0-alpha1'
compile 'com.github.bumptech.glide:glide:3.7.0'

之后MVP框架：

net包

Api接口类：

public static String DETAIL = "https://www.zhaoapi.cn/product/getProductDetail";   //详情接口
public static String ADDCART = "https://www.zhaoapi.cn/product/getCarts";           //添加购物车
public static String GETCART = "https://www.zhaoapi.cn/product/addCart";            //获得展示购物车（二级列表 需传uid,pid）

HttpUtils类：

package com.bwie.detailsdemo.net;

import java.util.Map;

import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.logging.HttpLoggingInterceptor;

/**
 * Created by admin on 2017/12/18.
 */

public class HttpUtils {

    private static volatile HttpUtils httpUtils;
    private final OkHttpClient client;

    private HttpUtils(){
        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
        logging.setLevel(HttpLoggingInterceptor.Level.BODY);
        client = new OkHttpClient.Builder()
                .addInterceptor(new MyInterceptor())
                .build();
    }

    public static HttpUtils getHttpUtils(){
        if (httpUtils == null){
            synchronized (HttpUtils.class){
                if (httpUtils == null){
                    httpUtils = new HttpUtils();
                }
            }
        }
        return httpUtils;
    }

    public void doGet(String url, Callback callback){
        Request request = new Request.Builder().url(url).build();
        client.newCall(request).enqueue(callback);
    }

    public void doPost(String url, Map<String, String> params, Callback callback){
        if (params == null) {
            throw new RuntimeException("参数为空了");
        }
        FormBody.Builder builder = new FormBody.Builder();
        for (Map.Entry<String, String> entry : params.entrySet()) {
            builder.add(entry.getKey(), entry.getValue());
        }
        FormBody formBody = builder.build();
        Request request = new Request.Builder().url(url).post(formBody).build();
        client.newCall(request).enqueue(callback);
    }
}

自定义拦截器MyInterceptor类：

package com.bwie.detailsdemo.net;

import java.io.IOException;

import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

/**
 * Created by admin on 2017/12/18.
 */

public class MyInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        if (request.method().equals("GET")){
            String url = request.url().url().toString();
            url += "&source=android";
            Request newRequest = request.newBuilder().url(url).build();
            return chain.proceed(newRequest);
        }else {
            FormBody formBody = (FormBody) request.body();
            FormBody.Builder builder = new FormBody.Builder();
            for (int i = 0; i <formBody.size(); i++){
                builder.add(formBody.name(i), formBody.value(i));
            }
            builder.add("source", "android");
            FormBody newFormBody = builder.build();
            Request newRequest = request.newBuilder().url(request.url().url().toString()).post(newFormBody).build();
            return chain.proceed(newRequest);
        }
    }
}

接口回调类OnNetListener：

package com.bwie.detailsdemo.net;

/**
 * Created by admin on 2017/12/18.
 */

public interface OnNetListener<T> {

    public void onSuccess(T t);

    public void onFailure(Exception e);
}

模块展示代码：

详情页面MVP：

Bean包

DetailBean

package com.example.peng.goodscard_1510d.bean;

/**
* Created by peng on 2017/12/14.
*/

public class DetailsBean {

/**
* msg :
* seller : {"description":"我是商家15","icon":"http://120.27.23.105/images/icon.png","name":"商家15","productNums":999,"score":5,"sellerid":15}
* code : 0
* data : {"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","itemtype":0,"pid":71,"price":32999,"pscid":40,"salenum":4242,"sellerid":15,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购新款Apple MacBook Pro 苹果笔记本电脑银色VP2新13英寸Bar i5/8G/256G"}
*/

private String msg;
private SellerBean seller;
private String code;
private DataBean data;

public String getMsg() {
return msg;
}

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

public SellerBean getSeller() {
return seller;
}

public void setSeller(SellerBean seller) {
this.seller = seller;
}

public String getCode() {
return code;
}

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

public DataBean getData() {
return data;
}

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

public static class SellerBean {
/**
* description : 我是商家15
* icon : http://120.27.23.105/images/icon.png
* name : 商家15
* productNums : 999
* score : 5.0
* sellerid : 15
*/

private String description;
private String icon;
private String name;
private int productNums;
private double score;
private int sellerid;

public String getDescription() {
return description;
}

public void setDescription(String description) {
this.description = description;
}

public String getIcon() {
return icon;
}

public void setIcon(String icon) {
this.icon = icon;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getProductNums() {
return productNums;
}

public void setProductNums(int productNums) {
this.productNums = productNums;
}

public double getScore() {
return score;
}

public void setScore(double score) {
this.score = score;
}

public int getSellerid() {
return sellerid;
}

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

public static class DataBean {
/**
* bargainPrice : 11800.0
* createtime : 2017-10-03T23:53:28
* detailUrl : https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1
* images : https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg
* itemtype : 0
* pid : 71
* price : 32999.0
* pscid : 40
* salenum : 4242
* sellerid : 15
* subhead : 购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）
* title : 全球购新款Apple MacBook Pro 苹果笔记本电脑银色VP2新13英寸Bar i5/8G/256G
*/

private double bargainPrice;
private String createtime;
private String detailUrl;
private String images;
private int itemtype;
private int pid;
private double price;
private int pscid;
private int salenum;
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 getItemtype() {
return itemtype;
}

public void setItemtype(int itemtype) {
this.itemtype = itemtype;
}

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 getSalenum() {
return salenum;
}

public void setSalenum(int salenum) {
this.salenum = salenum;
}

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;
}
}
}

Model层

DetailsService接口类

package com.example.peng.goodscard_1510d.model;

import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.net.OnNetListener;

import java.util.Map;

/**
* Created by peng on 2017/12/14.
*/

public interface DetailsService {
void getProductDetail(Map<String, String> params, OnNetListener<DetailsBean> onNetListener);
}

DetailsModel类

package com.example.peng.goodscard_1510d.model;

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

import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.net.Api;
import com.example.peng.goodscard_1510d.net.OkHttpUtils;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.google.gson.Gson;

import java.io.IOException;
import java.util.Map;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
* Created by peng on 2017/12/14.
*/

public class DetailsModel implements DetailsService {
private Handler handler = new Handler(Looper.getMainLooper());

@Override
public void getProductDetail(Map<String, String> params, final OnNetListener<DetailsBean> onNetListener) {
OkHttpUtils.getOkHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
final DetailsBean detailsBean = new Gson().fromJson(string, DetailsBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(detailsBean);
}
});
}
});
}
}

presenter类

DetailsPresenter类

package com.example.peng.goodscard_1510d.presenter;

import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.model.DetailsModel;
import com.example.peng.goodscard_1510d.model.DetailsService;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.example.peng.goodscard_1510d.view.IMainListener;

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

/**
* Created by peng on 2017/12/14.
*/

public class DetailsPresenter {
private IMainListener iMainListener;
private DetailsService detailsService;

public DetailsPresenter(IMainListener iMainListener) {
this.iMainListener = iMainListener;
detailsService = new DetailsModel();
}

public void dettach() {
iMainListener = null;
}

public void getProductDetail() {
Map<String, String> params = new HashMap<>();
params.put("pid", "71");
detailsService.getProductDetail(params, new OnNetListener<DetailsBean>() {
@Override
public void onSuccess(DetailsBean detailsBean) {
if (iMainListener != null) {
iMainListener.show(detailsBean);
}
}

@Override
public void onFailure(Exception e) {

}
});
}
}

view层

IMainListener接口类

package com.example.peng.goodscard_1510d.view;

import com.example.peng.goodscard_1510d.bean.DetailsBean;

/**
* Created by peng on 2017/12/14.
*/

public interface IMainListener {
void show(DetailsBean detailsBean);

void show(String str);
}

MainActivity类

package com.example.peng.goodscard_1510d.view;

import android.content.Intent;
import android.graphics.Paint;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextPaint;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.example.peng.goodscard_1510d.R;
import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.presenter.AddCartPresenter;
import com.example.peng.goodscard_1510d.presenter.DetailsPresenter;

/**
* 详情页面
*/
public class MainActivity extends AppCompatActivity implements IMainListener, View.OnClickListener {

private DetailsPresenter detailsPresenter;
private ImageView mIv;
private TextView mTvBargainPrice;
private TextView mTvPrice;
/**
* 购物车
*/
private TextView mTvCart;
/**
* 加入购物车
*/
private TextView mTvAddCart;
private AddCartPresenter addCartPresenter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
detailsPresenter = new DetailsPresenter(this);
addCartPresenter = new AddCartPresenter(this);
detailsPresenter.getProductDetail();
}

@Override
protected void onDestroy() {
super.onDestroy();
detailsPresenter.dettach();
addCartPresenter.dettach();
}

@Override
public void show(DetailsBean detailsBean) {
String images = detailsBean.getData().getImages();
String[] split = images.split("\\|");
Glide.with(this).load(split[0]).into(mIv);
TextPaint paint = mTvBargainPrice.getPaint();
paint.setFlags(Paint.STRIKE_THRU_TEXT_FLAG);
mTvBargainPrice.setText("原价：" + detailsBean.getData().getBargainPrice());
mTvPrice.setText("优惠价：" + detailsBean.getData().getPrice());
}

@Override
public void show(String str) {
Toast.makeText(MainActivity.this, str, Toast.LENGTH_SHORT).show();
}

private void initView() {
mIv = (ImageView) findViewById(R.id.iv);
mTvBargainPrice = (TextView) findViewById(R.id.tvBargainPrice);
mTvPrice = (TextView) findViewById(R.id.tvPrice);
mTvCart = (TextView) findViewById(R.id.tvCart);
mTvAddCart = (TextView) findViewById(R.id.tvAddCart);
mTvCart.setOnClickListener(this);
mTvAddCart.setOnClickListener(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
default:
break;
case R.id.tvCart:
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(intent);
break;
case R.id.tvAddCart:
addCartPresenter.addCart();
break;
}
}
}

activity_main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="com.example.peng.goodscard_1510d.view.MainActivity">

<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#ff3660"
android:gravity="center"
android:text="商品详情"
android:textColor="#ffffff"
android:textSize="25sp" />

<ImageView
android:id="@+id/iv"
android:layout_width="match_parent"
android:layout_height="400dp" />

<TextView
android:id="@+id/tvBargainPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp" />

<TextView
android:id="@+id/tvPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"></View>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp">

<TextView
android:id="@+id/tvCart"
android:layout_width="0dp"
android:background="#33000000"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="购物车" />

<TextView
android:id="@+id/tvAddCart"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#33000000"
android:gravity="center"
android:text="加入购物车" />
</LinearLayout>
</LinearLayout>

-----------------------------------------------------------------------------------------------------------------------------------------------

添加购物车

Bean：

AddCartBean类：

package com.example.peng.goodscard_1510d.bean;

/**
* Created by peng on 2017/12/14.
*/

public class AddCartBean {

/**
* msg : 加购成功
* code : 0
*/

private String msg;
private String code;

public String getMsg() {
return msg;
}

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

public String getCode() {
return code;
}

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

Model层

AddCartService接口类：

package com.example.peng.goodscard_1510d.model;

import com.example.peng.goodscard_1510d.bean.AddCartBean;
import com.example.peng.goodscard_1510d.net.OnNetListener;

import java.util.Map;

/**
* Created by peng on 2017/12/14.
*/

public interface AddCartService {
void addCart(Map<String, String> params, OnNetListener<AddCartBean> onNetListener);
}

AddCartModel类：

package com.example.peng.goodscard_1510d.model;

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

import com.example.peng.goodscard_1510d.bean.AddCartBean;
import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.net.Api;
import com.example.peng.goodscard_1510d.net.OkHttpUtils;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.google.gson.Gson;

import java.io.IOException;
import java.util.Map;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
* Created by peng on 2017/12/14.
*/

public class AddCartModel implements AddCartService {
private Handler handler = new Handler(Looper.getMainLooper());

@Override
public void addCart(Map<String, String> params, final OnNetListener<AddCartBean> onNetListener) {
OkHttpUtils.getOkHttpUtils().doPost(Api.str1, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
final AddCartBean addCartBean = new Gson().fromJson(string, AddCartBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(addCartBean);
}
});
}
});
}
}

presenter层：

AddCartPresenter类：

package com.example.peng.goodscard_1510d.presenter;

import com.example.peng.goodscard_1510d.bean.AddCartBean;
import com.example.peng.goodscard_1510d.model.AddCartModel;
import com.example.peng.goodscard_1510d.model.AddCartService;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.example.peng.goodscard_1510d.view.IMainListener;

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

/**
* Created by peng on 2017/12/14.
*/

public class AddCartPresenter {
private IMainListener iMainListener;
private AddCartService addCartService;

public AddCartPresenter(IMainListener iMainListener) {
this.iMainListener = iMainListener;
addCartService = new AddCartModel();
}

public void dettach() {
iMainListener = null;
}

public void addCart() {
Map<String, String> params = new HashMap<>();
params.put("pid", "71");
params.put("uid", "39");
addCartService.addCart(params, new OnNetListener<AddCartBean>() {
@Override
public void onSuccess(AddCartBean addCartBean) {
if (iMainListener != null) {
iMainListener.show(addCartBean.getCode().equals("0") ? "添加成功了" : "添加失败了");
}
}

@Override
public void onFailure(Exception e) {

}
});
}
}

View类呢跟详情页面一样都是MainActivity见上面

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

展示获得购物车

Bean类：

GetCartBean类：（二级列表）

package com.example.peng.goodscard_1510d.bean;

import java.util.List;

/**
* Created by peng on 2017/12/14.
*/

public class GetCartBean {

/**
* msg : 请求成功
* code : 0
* data : [{"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":2,"pid":9,"price":78.99,"pscid":1,"selected":0,"sellerid":2,"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2","sellerid":"2"},{"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":10,"price":555.55,"pscid":1,"selected":0,"sellerid":3,"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3","sellerid":"3"},{"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":1,"pid":11,"price":8989,"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":11800,"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":1,"pid":69,"price":16999,"pscid":40,"selected":0,"sellerid":13,"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13","sellerid":"13"},{"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":13,"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":1,"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":"2017-10-14T21:39:05","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":5,"price":88.99,"pscid":1,"selected":0,"sellerid":21,"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21","sellerid":"21"},{"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":7,"price":120.01,"pscid":1,"selected":0,"sellerid":23,"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23","sellerid":"23"}]
*/

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":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":9,"price":78.99,"pscid":1,"selected":0,"sellerid":2,"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2
* sellerid : 2
*/
private boolean checked;
private String sellerName;
private String sellerid;
private List<ListBean> list;

public boolean isChecked() {
return checked;
}

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

public String getSellerName() {
return sellerName;
}

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

public String getSellerid() {
return sellerid;
}

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

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

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

public static class ListBean {
/**
* bargainPrice : 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 : 9
* price : 78.99
* pscid : 1
* selected : 0
* sellerid : 2
* 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
*/
private boolean checked;
private int count = 1;
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 boolean isChecked() {
return checked;
}

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

public int getCount() {
return count;
}

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

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;
}
}
}
}

Model层：

GetCartService接口类：

package com.example.peng.goodscard_1510d.model;

import com.example.peng.goodscard_1510d.bean.AddCartBean;
import com.example.peng.goodscard_1510d.bean.GetCartBean;
import com.example.peng.goodscard_1510d.net.OnNetListener;

import java.util.Map;

/**
* Created by peng on 2017/12/14.
*/

public interface GetCartService {
void getCart(Map<String, String> params, OnNetListener<GetCartBean> onNetListener);
}

GetCartModel类：

package com.example.peng.goodscard_1510d.model;

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

import com.example.peng.goodscard_1510d.bean.DetailsBean;
import com.example.peng.goodscard_1510d.bean.GetCartBean;
import com.example.peng.goodscard_1510d.net.Api;
import com.example.peng.goodscard_1510d.net.OkHttpUtils;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.google.gson.Gson;

import java.io.IOException;
import java.util.Map;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
* Created by peng on 2017/12/14.
*/

public class GetCartModel implements GetCartService {
private Handler handler = new Handler(Looper.getMainLooper());

@Override
public void getCart(Map<String, String> params, final OnNetListener<GetCartBean> onNetListener) {
OkHttpUtils.getOkHttpUtils().doPost(Api.str2, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
final GetCartBean getCartBean = new Gson().fromJson(string, GetCartBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(getCartBean);
}
});
}
});
}
}

presenter类：

GetCartPresenter类：

package com.example.peng.goodscard_1510d.presenter;

import com.example.peng.goodscard_1510d.bean.GetCartBean;
import com.example.peng.goodscard_1510d.model.GetCartModel;
import com.example.peng.goodscard_1510d.model.GetCartService;
import com.example.peng.goodscard_1510d.net.OnNetListener;
import com.example.peng.goodscard_1510d.view.ISecondListener;

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

/**
* Created by peng on 2017/12/14.
*/

public class GetCartPresenter {
private ISecondListener iSecondListener;
private final GetCartService getCartService;

public GetCartPresenter(ISecondListener iSecondListener) {
this.iSecondListener = iSecondListener;
getCartService = new GetCartModel();
}

public void dettach() {
iSecondListener = null;
}

public void getCart() {
Map<String, String> params = new HashMap<>();
params.put("uid", "1234");
params.put("pid", "71");
getCartService.getCart(params, new OnNetListener<GetCartBean>() {
@Override
public void onSuccess(GetCartBean getCartBean) {
if (iSecondListener != null) {
List<GetCartBean.DataBean> group = getCartBean.getData();
List<List<GetCartBean.DataBean.ListBean>> child = new ArrayList<>();
for (int i = 0; i < group.size(); i++) {
child.add(group.get(i).getList());
}
iSecondListener.show(group, child);
}
}

@Override
public void onFailure(Exception e) {

}
});
}
}

View层

ISecondListener接口类：

package com.example.peng.goodscard_1510d.view;

import com.example.peng.goodscard_1510d.bean.GetCartBean;

import java.util.List;

/**
* Created by peng on 2017/12/14.
*/

public interface ISecondListener {
void show(List<GetCartBean.DataBean> group, List<List<GetCartBean.DataBean.ListBean>> child);
}

SecondActivity类：

package com.example.peng.goodscard_1510d.view;

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

import com.example.peng.goodscard_1510d.R;
import com.example.peng.goodscard_1510d.adapter.ElvAdapter;
import com.example.peng.goodscard_1510d.bean.GetCartBean;
import com.example.peng.goodscard_1510d.bean.PriceAndCount;
import com.example.peng.goodscard_1510d.presenter.GetCartPresenter;

import java.util.List;

public class SecondActivity extends AppCompatActivity implements ISecondListener {

private GetCartPresenter getCartPresenter;
private ExpandableListView mElv;
/**
* 全选
*/
private CheckBox mCb;
/**
* 合计:
*/
private TextView mTvTotal;
/**
* 去结算(0)
*/
private TextView mTvCount;
private ElvAdapter elvAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
initView();
getCartPresenter = new GetCartPresenter(this);
getCartPresenter.getCart();

mCb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
elvAdapter.AllOrNone(mCb.isChecked());
}
});
}

@Override
protected void onDestroy() {
super.onDestroy();
getCartPresenter.dettach();
}

@Override
public void show(List<GetCartBean.DataBean> group, List<List<GetCartBean.DataBean.ListBean>> child) {
elvAdapter = new ElvAdapter(this, group, child);
mElv.setGroupIndicator(null);
mElv.setAdapter(elvAdapter);
for (int i = 0; i < group.size(); i++) {
mElv.expandGroup(i);

}
}

private void initView() {
mElv = (ExpandableListView) findViewById(R.id.elv);
mCb = (CheckBox) findViewById(R.id.cb);
mTvTotal = (TextView) findViewById(R.id.tvTotal);
mTvCount = (TextView) findViewById(R.id.tvCount);
}

public void setPriceAndCount(PriceAndCount priceAndCount) {
mTvTotal.setText("合计：" + priceAndCount.getPrice());
mTvCount.setText("去结算(" + priceAndCount.getCount() + ")");
}

public void setAllChecked(boolean bool) {
mCb.setChecked(bool);
}
}

activity_second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="bwie.com.a1510dproject.view.GoodsCardActivity">

<ExpandableListView
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="40dp">

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

<TextView
android:id="@+id/tvTotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="15dp"
android:layout_toRightOf="@id/cb"
android:text="合计:" />

<TextView
android:id="@+id/tvCount"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="#ff0000"
android:gravity="center"
android:text="去结算(0)"
android:textColor="#ffffff" />
</RelativeLayout>
</LinearLayout>

二级列表布局：

一级列表：

<?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="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">

<CheckBox
android:id="@+id/cbGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tvGroup"
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center_vertical" />
</LinearLayout>

二级列表：

<?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:descendantFocusability="blocksDescendants"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="50dp">

<CheckBox
android:id="@+id/cbChild"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<ImageView
android:id="@+id/iv"
android:layout_width="100dp"
android:layout_height="100dp" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">

<TextView
android:id="@+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tvSubhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tvSubhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">

<TextView
android:id="@+id/tvPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<ImageView
android:layout_marginLeft="10dp"
android:id="@+id/ivDel"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_del" />

<TextView
android:id="@+id/tvNum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25sp"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:text="1"/>

<ImageView
android:id="@+id/ivAdd"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_add" />
</LinearLayout>
</LinearLayout>

<Button
android:id="@+id/btDel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="删除" />
</LinearLayout>

适配器：

ElvAdapter:

package com.example.peng.goodscard_1510d.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.example.peng.goodscard_1510d.R;
import com.example.peng.goodscard_1510d.bean.GetCartBean;
import com.example.peng.goodscard_1510d.bean.PriceAndCount;
import com.example.peng.goodscard_1510d.view.SecondActivity;

import java.util.List;

/**
* Created by peng on 2017/12/14.
*/

public class ElvAdapter extends BaseExpandableListAdapter {
private Context context;
private List<GetCartBean.DataBean> group;
private List<List<GetCartBean.DataBean.ListBean>> child;
private final LayoutInflater inflater;

public ElvAdapter(Context context, List<GetCartBean.DataBean> group, List<List<GetCartBean.DataBean.ListBean>> child) {
this.context = context;
this.group = group;
this.child = child;
inflater = LayoutInflater.from(context);
}

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

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

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

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

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

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

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

@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view;
final GroupViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.elv_group, null);
holder = new GroupViewHolder();
holder.tv = view.findViewById(R.id.tvGroup);
holder.cbGroup = view.findViewById(R.id.cbGroup);
view.setTag(holder);
} else {
view = convertView;
holder = (GroupViewHolder) view.getTag();
}
final GetCartBean.DataBean dataBean = group.get(groupPosition);
holder.tv.setText(dataBean.getSellerName());
holder.cbGroup.setChecked(dataBean.isChecked());

holder.cbGroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改变三个checkbox的状态值
//1.一级列表的checkbox状态值
dataBean.setChecked(holder.cbGroup.isChecked());
//2.二级列表的checkbox状态值
setChildrenCb(groupPosition, holder.cbGroup.isChecked());
//3.全选的checkbox状态值
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//计算钱和数量并显示
setPriceAndCount();
//刷新界面
notifyDataSetChanged();
}
});
return view;
}

@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, final View convertView, ViewGroup parent) {
View view;
final ChildViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.elv_child, null);
holder = new ChildViewHolder();
holder.iv = view.findViewById(R.id.iv);
holder.tvTitle = view.findViewById(R.id.tvTitle);
holder.tvSubhead = view.findViewById(R.id.tvSubhead);
holder.tvPrice = view.findViewById(R.id.tvPrice);
holder.cbChild = view.findViewById(R.id.cbChild);
holder.btDel = view.findViewById(R.id.btDel);
holder.tvNum = view.findViewById(R.id.tvNum);
holder.ivDel = view.findViewById(R.id.ivDel);
holder.ivAdd = view.findViewById(R.id.ivAdd);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}

final GetCartBean.DataBean.ListBean listBean = child.get(groupPosition).get(childPosition);
String images = listBean.getImages();
Glide.with(context).load(images.split("\\|")[0]).into(holder.iv);
holder.tvTitle.setText(listBean.getTitle());
holder.cbChild.setChecked(child.get(groupPosition).get(childPosition).isChecked());
holder.tvSubhead.setText(listBean.getSubhead());
holder.tvPrice.setText(listBean.getPrice() + "元");
holder.tvNum.setText(listBean.getCount() + "");
//给checkbox设置点击事件
holder.cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改变三个checkbox的状态值
//1.二级列表的checkbox状态值
listBean.setChecked(holder.cbChild.isChecked());
//2.一级列表的checkbox状态值
group.get(groupPosition).setChecked(isAllChildCbChecked(groupPosition));
//3.全选的checkbox状态值
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//计算钱和数量并显示
setPriceAndCount();
//刷新界面
notifyDataSetChanged();
}
});

holder.ivAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//获取目前显示的值
int count = listBean.getCount();
count++;
//改变JavaBean里的状态值
listBean.setCount(count);
//计算钱和数量并显示
setPriceAndCount();
//刷新列表
notifyDataSetChanged();
}
});
holder.ivDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//获取目前显示的值
int count = listBean.getCount();
if (count <= 1) {
count = 1;
} else {
count--;
}
//改变JavaBean里的状态值
listBean.setCount(count);
//计算钱和数量并显示
setPriceAndCount();
//刷新列表
notifyDataSetChanged();
}
});

holder.btDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//其实就是删除集合
List<GetCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
if (listBeans.size() > 0) {
listBeans.remove(childPosition);
}
if (listBeans.size() == 0) {
child.remove(groupPosition);
group.remove(groupPosition);
}
//计算钱和数量并显示
setPriceAndCount();
//改变全选状态
((SecondActivity) context).setAllChecked(isAllGroupCbChecked());
//刷新列表
notifyDataSetChanged();
}
});
return view;
}

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

class GroupViewHolder {
TextView tv;
CheckBox cbGroup;
}

class ChildViewHolder {
ImageView iv;
TextView tvTitle;
TextView tvSubhead;
TextView tvPrice;
CheckBox cbChild;
Button btDel;
TextView tvNum;
ImageView ivDel;
ImageView ivAdd;
}

/**
* 设置一级列表对应的二级列表checkbox状态
*
* @param groupPosition
* @param bool
*/
private void setChildrenCb(int groupPosition, boolean bool) {
List<GetCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
listBeans.get(i).setChecked(bool);
}
}

/**
* 判断一级列表checkbox状态
*
* @return
*/
private boolean isAllGroupCbChecked() {
if (group.size() == 0) {
return false;
}
for (int i = 0; i < group.size(); i++) {
if (!group.get(i).isChecked()) {
return false;
}
}
return true;
}

/**
* 判断二级列表checkbox状态
*
* @return
*/
private boolean isAllChildCbChecked(int groupPosition) {
List<GetCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
if (!listBeans.get(i).isChecked()) {
return false;
}
}
return true;
}

/**
* 设置钱和数量
*/
private void setPriceAndCount() {
((SecondActivity) context).setPriceAndCount(compute());
}

/**
* 计算钱和数量
*/
private PriceAndCount compute() {
double price = 0;
int count = 0;
for (int i = 0; i < group.size(); i++) {
List<GetCartBean.DataBean.ListBean> listBeans = child.get(i);
for (int j = 0; j < listBeans.size(); j++) {
if (listBeans.get(j).isChecked()) {
price += listBeans.get(j).getPrice() * listBeans.get(j).getCount();
count += listBeans.get(j).getCount();
}
}
}
return new PriceAndCount(price, count);
}

/**
* 全选或者全不选
*
* @param bool
*/
public void AllOrNone(boolean bool) {
for (int i = 0; i < group.size(); i++) {
group.get(i).setChecked(bool);
setChildrenCb(i, bool);
}
setPriceAndCount();
notifyDataSetChanged();
}
}

drawable目录下的加减图片