简单的RecyclerView嵌套RecyclerView实现购物车效果

今天趁着有空，记录一下在程序中利用RecyclerView嵌套RecyclerView实现的一个购物车功能。

效果如图

勾选与取消勾选都做了相关处理。

首先是首页的布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/gray"
    >
<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/b2c_shop_cart_recyclerView"
    android:background="#999"
    android:layout_marginBottom="70dp"
    android:paddingTop="20dp"
    >
</android.support.v7.widget.RecyclerView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:orientation="horizontal"
        android:layout_alignParentBottom="true"
        android:background="#fff"
        android:gravity="center_vertical"
        >
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textSize="16sp"
            android:text="全选"
            android:id="@+id/b2c_shop_all_radiobutton"
            android:button="@null"
            android:drawableLeft="@drawable/shop_cart_all_select_bg"
            android:drawablePadding="5dp"
            android:layout_marginLeft="50dp"
            android:padding="10dp"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center_vertical"
            android:text="管理"
            android:layout_marginLeft="80dp"
            android:textSize="18sp"
            android:padding="10dp"
            android:id="@+id/b2c_shop_manage"
            />
        <View
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            />
        <Button
            android:layout_width="240dp"
            android:layout_height="match_parent"
            android:layout_gravity="right"
            android:text="结算(￥0)"
            android:textSize="20sp"
            android:textColor="#fff"
            android:background="#00a6f2"
            android:id="@+id/b2c_shop_ok"
            />
    </LinearLayout>
</RelativeLayout>

首页的activity代码

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.TextView;

import com.google.gson.Gson;
import com.hykd.businessapp.R;
import com.hykd.businessapp.adapter.MallShopCartBusinessAdapter;
import com.hykd.businessapp.api.TestApi;
import com.hykd.businessapp.bean.MallShopCartBean;
import com.hykd.businessapp.bean.UpdataButton;
import com.zhy.http.okhttp.OkHttpUtils;
import com.zhy.http.okhttp.callback.Callback;

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

import java.util.List;

import okhttp3.Call;
import okhttp3.Response;

/**
 * Created by Administrator on 2017/12/28 0028.
 */

public class B2cShopCart extends Activity {
    RecyclerView recyclerView;
    MallShopCartBusinessAdapter mallShopCartAdapter;
    RadioButton radioButton;
    boolean isselect=false;
    TextView b2c_shop_manage;
    Button b2c_shop_ok;
    MallShopCartBean shopCart2Beans2;
    List<MallShopCartBean.Data> data;
    String allprice="0";
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_b2c_shop_cart);
        EventBus.getDefault().register(this);
        recyclerView=findViewById(R.id.b2c_shop_cart_recyclerView);
        b2c_shop_manage=findViewById(R.id.b2c_shop_manage);
        b2c_shop_ok=findViewById(R.id.b2c_shop_ok);
        radioButton=findViewById(R.id.b2c_shop_all_radiobutton);
        //初始化数据
        initData();
        //管理按钮的点击时间监听，切换管理跟删除文字以及按钮文字
        b2c_shop_manage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(b2c_shop_manage.getText().toString().equals("管理")){
                    b2c_shop_manage.setText("完成");
                    b2c_shop_ok.setText("删除");
                    allprice="0";
                    b2c_shop_ok.setBackgroundResource(R.drawable.shop_cart_delete_button_bg);
                    b2c_shop_ok.setTextColor(Color.parseColor("#00a0e9"));
                }else {
                    b2c_shop_manage.setText("管理");
                    b2c_shop_ok.setText("结算(￥"+allprice+")");
                    b2c_shop_ok.setBackgroundColor(Color.parseColor("#00a6f2"));
                    b2c_shop_ok.setTextColor(Color.parseColor("#ffffff"));
                }
            }
        });
        //全选按钮点击事件监听，连带改变recyclerView中item的选中状态。
        radioButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(isselect){
                    radioButton.setChecked(false);
                    isselect=false;
                    mallShopCartAdapter.setAllselect(false);
                }else {
                    radioButton.setChecked(true);
                    isselect=true;
                    mallShopCartAdapter.setAllselect(true);
                }
            }
        });
        //点击结算按钮的事件监听。
        b2c_shop_ok.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(b2c_shop_ok.getText().toString().equals("删除")){
                        //这里删除列表中的商品
                    deleteProduct();
                }else {
                    //这里进入结算界面
                }
            }
        });
    }
    //这里是adapter中的点击事件回调，我这个项目中没用上，还是写出来。
   public MallShopCartBusinessAdapter.OnRecyclerViewItemClickListener onRecyclerViewItemClickListener=new MallShopCartBusinessAdapter.OnRecyclerViewItemClickListener() {
       @Override
       public void onItemClick(View view, MallShopCartBean.Data data) {

       }
    };


    private void deleteProduct(){
        String deleteid=mallShopCartAdapter.getDeleteProductID();
         OkHttpUtils.get().url(TestApi.jianan+TestApi.deleteProduct)
                     .addParams("ids",deleteid)
                     .build()
                     .execute(new Callback() {
                         @Override
                         public Object parseNetworkResponse(Response response, int id) throws Exception {
                             return null;
                         }

                         @Override
                         public void onError(Call call, Exception e, int id) {

                         }

                         @Override
                         public void onResponse(Object response, int id) {
                             initData();
                         }
                     });
    }
    private void initData(){
        //测试用的数据转换成实体类，赋值到adapter中
        String jsonData="{\"code\":200,\"data\":[{\"sellerId\":1,\"cartItemResultDtoList\":[{\"mainImg\":\"http://imglib.medrd.com/group1/M00/00/02/CthJHVpgYPyAXGBjAACn6upITiQ992.jpg\",\"quantity\":1,\"sellerName\":\"华医B2C旗舰店\",\"goodId\":9,\"goodPrice\":\"0.01\",\"fullCutResultDtos\":[],\"goodImg\":\"M00/00/02/CthJHVpgYPyAXGBjAACn6upITiQ992.jpg\",\"sellerId\":1,\"goodName\":\"百草味牛肉条(五香味)1...\",\"specificationValues\":[{\"active\":1,\"created\":\"2018-01-29 16:43:45\",\"id\":28,\"image\":null,\"name\":\"100g\",\"orders\":3,\"seller_id\":1,\"specification_id\":5,\"updated\":\"2018-01-29 16:43:45\"}],\"id\":505,\"stock\":94,\"selected\":true},{\"mainImg\":\"http://imglib.medrd.com/group1/M00/00/02/CthJHVplO7SAE4jWAAEaatjcfgQ285.jpg\",\"quantity\":2,\"sellerName\":\"华医B2C旗舰店\",\"goodId\":21,\"goodPrice\":\"99\",\"fullCutResultDtos\":[],\"goodImg\":\"M00/00/02/CthJHVplO7SAE4jWAAEaatjcfgQ285.jpg\",\"sellerId\":1,\"goodName\":\"蓝月亮洗衣液套装2kg瓶...\",\"specificationValues\":[],\"id\":506,\"stock\":150,\"selected\":true}],\"sellerName\":\"华医B2C旗舰店\"}],\"Success\":true}";
        Gson gson = new Gson();
        shopCart2Beans2=gson.fromJson(jsonData,MallShopCartBean.class);
        data=null;
        data=shopCart2Beans2.getData();
        if(mallShopCartAdapter!=null){
            mallShopCartAdapter.setmDatas(data);
            mallShopCartAdapter.notifyDataSetChanged();
        }else {
            mallShopCartAdapter=new MallShopCartBusinessAdapter(B2cShopCart.this,data);
            recyclerView.setLayoutManager(new LinearLayoutManager(B2cShopCart.this,LinearLayoutManager.VERTICAL,false));
            recyclerView.setAdapter(mallShopCartAdapter);
            mallShopCartAdapter.setOnItemClickListener(onRecyclerViewItemClickListener);
        }

//        OkHttpUtils.get().url(TestApi.jianan+TestApi.getShopCartGoodsL)
//                         .addParams("buyerId",2+"")
//                         .build()
//                         .execute(new Callback() {
//                             @Override
//                             public MallShopCartBean parseNetworkResponse(Response response, int id) throws Exception {
//                                 String string = response.body().string();
//                                 Log.d("MallShopCartBean===",string);
//                                 MallShopCartBean user = new Gson().fromJson(string, MallShopCartBean.class);
//                                 return user;
//                             }
//
//                             @Override
//                             public void onError(Call call, Exception e, int id) {
//                                 Toast.makeText(B2cShopCart.this, "服务异常!", Toast.LENGTH_SHORT).show();
//                             }
//
//                             @Override
//                             public void onResponse(Object response, int id) {
//
//                                 shopCart2Beans2=(MallShopCartBean)response;
//                                 data=null;
//                                 data=shopCart2Beans2.getData();
//                                    if(mallShopCartAdapter!=null){
//                                        mallShopCartAdapter.setmDatas(data);
//                                        mallShopCartAdapter.notifyDataSetChanged();
//                                    }else {
//                                        mallShopCartAdapter=new MallShopCartBusinessAdapter(B2cShopCart.this,data);
//                                        recyclerView.setLayoutManager(new LinearLayoutManager(B2cShopCart.this,LinearLayoutManager.VERTICAL,false));
//                                        recyclerView.setAdapter(mallShopCartAdapter);
//                                        mallShopCartAdapter.setOnItemClickListener(onRecyclerViewItemClickListener);
//                                    }
//
//                             }
//                         });


    }
    //这里用了eventBus来进行实时价格的UI更改。
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void messageEventBus(UpdataButton event){
        //刷新UI
        if(!b2c_shop_ok.getText().toString().equals("删除")){
            b2c_shop_ok.setText("结算(￥"+event.getAllPrice()+")");
            allprice=event.getAllPrice();
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }
}

MallShopCartBean

import java.math.BigDecimal;
import java.util.List;

/**
 * Created by Administrator on 2018/1/9 0009.
 */

public class MallShopCartBean implements Cloneable{
    Integer code;
    Boolean Success;
    List<Data> data;
    public Integer getCode() {
        return code;
    }

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

    public Boolean getSuccess() {
        return Success;
    }

    public void setSuccess(Boolean success) {
        Success = success;
    }

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

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

    public class Data{
        Integer sellerId;
        String sellerName;
        List<CartItemResultDtoList> cartItemResultDtoList;
        boolean isChecked;

        public boolean isChecked() {
            return isChecked;
        }

        public void setChecked(boolean checked) {
            isChecked = checked;
        }

        public Integer getSellerId() {
            return sellerId;
        }

        public void setSellerId(Integer sellerId) {
            this.sellerId = sellerId;
        }

        public String getSellerName() {
            return sellerName;
        }

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

        public List<CartItemResultDtoList> getCartItemResultDtoList() {
            return cartItemResultDtoList;
        }

        public void setCartItemResultDtoList(List<CartItemResultDtoList> cartItemResultDtoList) {
            this.cartItemResultDtoList = cartItemResultDtoList;
        }

        public class CartItemResultDtoList{
            String mainImg;
            Integer quantity;
            String goodName;
            Integer id;
            Integer goodId;
            Integer stock;
            BigDecimal goodPrice;
            List<SpecificationValues> specificationValues;
            boolean isChecked;

            public boolean isChecked() {
                return isChecked;
            }

            public void setChecked(boolean checked) {
                isChecked = checked;
            }

            public String getMainImg() {
                return mainImg;
            }

            public void setMainImg(String mainImg) {
                this.mainImg = mainImg;
            }

            public Integer getQuantity() {
                return quantity;
            }

            public void setQuantity(Integer quantity) {
                this.quantity = quantity;
            }

            public String getGoodName() {
                return goodName;
            }

            public void setGoodName(String goodName) {
                this.goodName = goodName;
            }

            public Integer getId() {
                return id;
            }

            public void setId(Integer id) {
                this.id = id;
            }

            public Integer getGoodId() {
                return goodId;
            }

            public void setGoodId(Integer goodId) {
                this.goodId = goodId;
            }

            public Integer getStock() {
                return stock;
            }

            public void setStock(Integer stock) {
                this.stock = stock;
            }

            public BigDecimal getGoodPrice() {
                return goodPrice;
            }

            public void setGoodPrice(BigDecimal goodPrice) {
                this.goodPrice = goodPrice;
            }

            public List<SpecificationValues> getSpecificationValues() {
                return specificationValues;
            }

            public void setSpecificationValues(List<SpecificationValues> specificationValues) {
                this.specificationValues = specificationValues;
            }
            public class SpecificationValues{
                Integer id;
                String name;
                Integer specification_id;
                Integer active;
                Integer orders;

                public Integer getId() {
                    return id;
                }

                public void setId(Integer id) {
                    this.id = id;
                }

                public String getName() {
                    return name;
                }

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

                public Integer getSpecification_id() {
                    return specification_id;
                }

                public void setSpecification_id(Integer specification_id) {
                    this.specification_id = specification_id;
                }

                public Integer getActive() {
                    return active;
                }

                public void setActive(Integer active) {
                    this.active = active;
                }

                public Integer getOrders() {
                    return orders;
                }

                public void setOrders(Integer orders) {
                    this.orders = orders;
                }

                @Override
                public String toString() {
                    return "SpecificationValues{" +
                            "id=" + id +
                            ", name='" + name + '\'' +
                            ", specification_id=" + specification_id +
                            ", active=" + active +
                            ", orders=" + orders +
                            '}';
                }
            }

            @Override
            public String toString() {
                return "CartItemResultDtoList{" +
                        "mainImg='" + mainImg + '\'' +
                        ", quantity=" + quantity +
                        ", goodName='" + goodName + '\'' +
                        ", id=" + id +
                        ", goodId=" + goodId +
                        ", stock=" + stock +
                        ", goodPrice=" + goodPrice +
                        ", specificationValues=" + specificationValues +
                        ", isChecked=" + isChecked +
                        '}';
            }
        }

        @Override
        public String toString() {
            return "Data{" +
                    "sellerId=" + sellerId +
                    ", sellerName='" + sellerName + '\'' +
                    ", cartItemResultDtoList=" + cartItemResultDtoList +
                    ", isChecked=" + isChecked +
                    '}';
        }
    }

    @Override
    public String toString() {
        return "MallShopCart2Bean{" +
                "code=" + code +
                ", Success=" + Success +
                ", data=" + data +
                '}';
    }
}

item_mall_shop_cart_business_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:layout_marginBottom="15dp"
    android:background="#fff"
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/item_layout"
        android:gravity="center"
        android:visibility="gone"
        >
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/itme_text1"
            android:textSize="25sp"
            android:text="test11111"
            android:gravity="center"
            />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/itme_text2"
            android:textSize="25sp"
            android:text="test2222"
            android:layout_marginTop="20dp"
            android:gravity="center"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:gravity="center_vertical"
        >
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:button="@drawable/shop_cart_all_select_bg"
            android:id="@+id/item_mall_shop_cart_businessname_select"
            android:padding="10dp"
            />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="XXX旗舰店"
        android:textSize="20sp"
        android:drawableRight="@mipmap/arrows_right"
        android:drawablePadding="10dp"
        android:id="@+id/item_mall_shop_cart_businessname"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="15dp"
        />
    </LinearLayout>
    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/item_mall_shop_cart_recyclerview"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        >

    </android.support.v7.widget.RecyclerView>
</LinearLayout>

MallShopCartBusinessAdapter

import android.content.Context;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

import com.hykd.businessapp.R;
import com.hykd.businessapp.bean.MallShopCartBean;
import com.hykd.businessapp.bean.UpdataButton;

import org.greenrobot.eventbus.EventBus;

import java.math.BigDecimal;
import java.util.List;

/**
 * Created by Administrator on 2017/12/28 0028.
 */

public class MallShopCartBusinessAdapter extends RecyclerView.Adapter<MallShopCartBusinessAdapter.MyViewHolder> implements View.OnClickListener{
    private Context mContext;
    private  List<MallShopCartBean.Data> mDatas;
    private LayoutInflater inflater;
    private OnRecyclerViewItemClickListener  onItemClickListener;
    MallShopCartProductAdapter mallShopCartAdapter;
    private boolean isselect=false;
    int pos=0;
    public MallShopCartBusinessAdapter(Context context, List<MallShopCartBean.Data> cartBeans){
        this. mContext=context;
        this. mDatas=cartBeans;
        inflater= LayoutInflater.from(mContext);
//        flag=new boolean[jsonArray.length()];
//        zflag=new boolean[jsonArray.length()];
    }
    //返回item布局
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.item_mall_shop_cart_business_list,parent, false);
        MyViewHolder holder= new MyViewHolder(view);
        view.setOnClickListener(this);
        return holder;
    }
    @Override
    public void onBindViewHolder(final MallShopCartBusinessAdapter.MyViewHolder holder, int position) {
        final MallShopCartBean.Data cartBean = mDatas.get(position);
        holder.bussinessname.setText(cartBean.getSellerName());
        holder.checkBox.setOnCheckedChangeListener(null);
        //读取实体内存储的选中状态
        holder.checkBox.setChecked(cartBean.isChecked());
        holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                //更改item选中状态同时进行实体内的选中状态改变
                cartBean.setChecked(isChecked);
//                flag[position]=isChecked;
                //外层选中状态改变后，要遍历改变子recyclerView内item的选中状态
                for (MallShopCartBean.Data.CartItemResultDtoList cartItemResultDtoList : cartBean.getCartItemResultDtoList()){
                    cartItemResultDtoList.setChecked(isChecked);
                }
                notifyDataSetChanged();
                EventBus.getDefault().post(new UpdataButton(getAllPrice()));
            }
        });
        holder.itemView.setTag(cartBean);//传object回去
        //单个商家的商品列表不需要滑动，所以在这里禁止掉商品item的滑动事件
        LinearLayoutManager  linearLayoutManager = new LinearLayoutManager(mContext,LinearLayoutManager.VERTICAL, false) {
            @Override
            public boolean canScrollVertically() {
                return false;
            }
        };
        //这里是初始化商品item的recyclerView,将外层实例传入子层以便刷新
        mallShopCartAdapter=new MallShopCartProductAdapter(mContext,cartBean.getCartItemResultDtoList(),cartBean,this);
        holder.recyclerView.setLayoutManager(linearLayoutManager);
        holder.recyclerView.setAdapter(mallShopCartAdapter);
        //下面两句是防止刷新商品的recyclerView导致商家recyclerView也发生滑动
        holder.recyclerView.setFocusableInTouchMode(false);
        holder.recyclerView.requestFocus();
    }
    @Override
    public int getItemCount() {
        return mDatas.size();
    }
    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public void onClick(View v) {
        if (onItemClickListener != null) {
            //注意这里使用getTag方法获取数据
            onItemClickListener.onItemClick(v,(MallShopCartBean.Data) v.getTag());
        }
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView bussinessname;
        CheckBox checkBox;
        RecyclerView recyclerView;
        public MyViewHolder(View view) {
            super(view);
            bussinessname=view.findViewById(R.id.item_mall_shop_cart_businessname);
            checkBox=view.findViewById(R.id.item_mall_shop_cart_businessname_select);
            recyclerView=view.findViewById(R.id.item_mall_shop_cart_recyclerview);
        }
    }
    public interface OnRecyclerViewItemClickListener {
        void onItemClick(View view , MallShopCartBean.Data data);
    }
    public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
        this.onItemClickListener = listener;
    }
    //设置全选/全不选
    public void setAllselect(boolean b){
        for(int i=0;i<mDatas.size();i++){
            mDatas.get(i).setChecked(b);
            for (MallShopCartBean.Data.CartItemResultDtoList cartItemResultDtoList : mDatas.get(i).getCartItemResultDtoList()){
                cartItemResultDtoList.setChecked(b);
            }
        }
        notifyDataSetChanged();
        EventBus.getDefault().post(new UpdataButton(getAllPrice()));
    }
    public String getSelectTitle(){
        StringBuffer stringBuffer=new StringBuffer();
        if(mDatas!=null){
            for (int i=0;i<mDatas.size();i++){
                List<MallShopCartBean.Data.CartItemResultDtoList> data=mDatas.get(i).getCartItemResultDtoList();
                for (int y=0;y<data.size();y++){
                    if(data.get(y).isChecked()){
                        stringBuffer.append(data.get(y).getGoodName());
                        if(y<data.size()-1){
                            stringBuffer.append(",");
                        }
                    }
                }
            }
        }
        return stringBuffer.toString();
    }
    //获取需要删除的商品id
    public String getDeleteProductID(){
        StringBuffer stringBuffer=new StringBuffer();
        if(mDatas!=null){
            for (int i=0;i<mDatas.size();i++){
                List<MallShopCartBean.Data.CartItemResultDtoList> data=mDatas.get(i).getCartItemResultDtoList();
                for (int y=0;y<data.size();y++){
                    if(data.get(y).isChecked()){
                        stringBuffer.append(data.get(y).getId());
                        if(y<data.size()-1){
                            stringBuffer.append("#");
                        }
                    }
                }
            }
        }
        return stringBuffer.toString();
    }

public void setmDatas( List<MallShopCartBean.Data> mDatas){
    this.mDatas=mDatas;
}
//获取需要商品总价格
public String getAllPrice(){
    BigDecimal allprice =new  BigDecimal("0");
    if(mDatas!=null){
        for (int i=0;i<mDatas.size();i++){
            List<MallShopCartBean.Data.CartItemResultDtoList> data=mDatas.get(i).getCartItemResultDtoList();
            for (int y=0;y<data.size();y++){
                if(data.get(y).isChecked()){
                    System.out.println(data.get(y).getGoodPrice()+"getGoodPrice");
                    BigDecimal interestRate = new BigDecimal(data.get(y).getQuantity());
                    BigDecimal interest = data.get(y).getGoodPrice().multiply(interestRate);
                    allprice=allprice.add(interest);
                    System.out.println(allprice+"allprice"+interest+"interestRate"+interestRate);
                }
            }
        }
    }
    return  allprice.toString();
}
}

item_mall_shop_cart_product_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="164dp"
    android:orientation="vertical"
    >
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#b2b2b2"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:layout_marginRight="20dp"
        >
<CheckBox
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical"
    android:button="@drawable/shop_cart_all_select_bg"
    android:layout_marginLeft="20dp"
    android:id="@+id/item_mall_shop_cart_list_checkbox"
    android:padding="10dp"
    />
    <ImageView
        android:layout_width="140dp"
        android:layout_height="140dp"
        android:layout_marginTop="12dp"
        android:layout_marginBottom="12dp"
        android:layout_marginRight="20dp"
        android:id="@+id/item_mall_shop_cart_list_iamgeview"
        android:scaleType="centerCrop"
        />
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_weight="1"
    android:layout_gravity="center_vertical"
    >
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="20sp"
    android:id="@+id/item_mall_shop_cart_list_title"
    android:layout_marginTop="10dp"
    />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:layout_marginTop="12dp"
        android:textColor="#999"
        android:id="@+id/item_mall_shop_cart_list_pecification"
        />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        android:layout_marginTop="32dp"
        android:textColor="#f00"
        android:id="@+id/item_mall_shop_cart_list_price"
        />
</LinearLayout>
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:src="@mipmap/minus_button"
        android:id="@+id/item_mall_shop_cart_list_minus_button"
        />
    <TextView
        android:layout_width="100dp"
        android:layout_height="40dp"
        android:layout_gravity="center_vertical"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:text="1"
        android:gravity="center"
        android:textSize="18sp"
        android:id="@+id/item_mall_shop_cart_list_number"
        android:background="@drawable/shop_cart_number_text_bg"
        />
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:src="@mipmap/add_button"
        android:id="@+id/item_mall_shop_cart_list_add_button"
        />
    </LinearLayout>
</LinearLayout>

MallShopCartProductAdapter

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.hykd.businessapp.R;
import com.hykd.businessapp.bean.MallShopCartBean;
import com.hykd.businessapp.bean.UpdataButton;

import org.greenrobot.eventbus.EventBus;

import java.util.List;

/**
 * Created by Administrator on 2017/12/28 0028.
 */

public class MallShopCartProductAdapter extends RecyclerView.Adapter<MallShopCartProductAdapter.MyViewHolder> implements View.OnClickListener{
    private Context mContext;
    private List<MallShopCartBean.Data.CartItemResultDtoList> mDatas;
    private LayoutInflater inflater;
    private OnRecyclerViewItemClickListener  onItemClickListener;
    MallShopCartBean.Data bean;
    MallShopCartBusinessAdapter mallShopCartAdapter2;
    public MallShopCartProductAdapter(Context context, List<MallShopCartBean.Data.CartItemResultDtoList> jsonArray, MallShopCartBean.Data bean, MallShopCartBusinessAdapter mallShopCartAdapter2){
        this. mContext=context;
        this. mDatas=jsonArray;
        this.bean=bean;
        this.mallShopCartAdapter2=mallShopCartAdapter2;
        inflater= LayoutInflater.from(mContext);
    }
    //返回item布局
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.item_mall_shop_cart_product_list,parent, false);
        MyViewHolder holder= new MyViewHolder(view);
        view.setOnClickListener(this);
        return holder;
    }
    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public void onBindViewHolder(final MallShopCartProductAdapter.MyViewHolder holder, final int position) {
        final MallShopCartBean.Data.CartItemResultDtoList cartBean = mDatas.get(position);
        holder.item_mall_shop_cart_list_title.setText(cartBean.getGoodName());
        holder.checkBox.setOnCheckedChangeListener(null);
        //读取实体内存储的选中状态
        holder.checkBox.setChecked(cartBean.isChecked());

        holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//                flag[position]=isChecked;
                //更改item选中状态同时进行实体内的选中状态改变
                cartBean.setChecked(isChecked);
                boolean noSelect=false;
                //内层item选中状态改变后要遍历判断是否全选，以改变外层item的选中状态
                for(MallShopCartBean.Data.CartItemResultDtoList cartItemResultDtoList :mDatas){
                    if(!cartItemResultDtoList.isChecked()){
                        noSelect=true;
                    }
                }
                if(!noSelect){
                    bean.setChecked(!noSelect);
                    mallShopCartAdapter2.notifyDataSetChanged();
                }else{
                    bean.setChecked(!noSelect);
                    mallShopCartAdapter2.notifyDataSetChanged();
                }
                EventBus.getDefault().post(new UpdataButton(mallShopCartAdapter2.getAllPrice()));
            }
        });
        holder.item_mall_shop_cart_list_number.setText(mDatas.get(position).getQuantity()+"");
        holder.item_mall_shop_cart_list_add_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int number=Integer.valueOf(holder.item_mall_shop_cart_list_number.getText().toString());
                if(number<mDatas.get(position).getStock()){
                    number++;
                    mDatas.get(position).setQuantity(number);
                    EventBus.getDefault().post(new UpdataButton(mallShopCartAdapter2.getAllPrice()));
                    holder.item_mall_shop_cart_list_number.setText(number+"");
                }else {
                    Toast.makeText(mContext, "已经是最大库存量!", Toast.LENGTH_SHORT).show();
                }


            }
        });
        holder.item_mall_shop_cart_list_minus_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int number=Integer.valueOf(holder.item_mall_shop_cart_list_number.getText().toString());
                if(number>1){
                    number--;
                    mDatas.get(position).setQuantity(number);
                    EventBus.getDefault().post(new UpdataButton(mallShopCartAdapter2.getAllPrice()));
                    holder.item_mall_shop_cart_list_number.setText(number+"");
                }else {
                    Toast.makeText(mContext, "已经是最少数量!", Toast.LENGTH_SHORT).show();
                }

            }
        });
        holder.item_mall_shop_cart_list_price.setText("￥"+mDatas.get(position).getGoodPrice()+"");
        StringBuffer stringBuffer=new StringBuffer();
        List<MallShopCartBean.Data.CartItemResultDtoList.SpecificationValues> list=mDatas.get(position).getSpecificationValues();
        for (int i=0;i<list.size();i++){
                stringBuffer.append(list.get(i).getName());
                if(i<list.size()-1){
                    stringBuffer.append(",");
                }

        }
        holder.item_mall_shop_cart_list_pecification.setText("规格:"+stringBuffer);
        Glide.with(mContext).load("http://res.medrd.com/pic/2017/12/b124badaa47347ec8bd3d50f152e2d6b.png").into(holder.item_mall_shop_cart_list_iamgeview);
        holder.itemView.setTag(mDatas.get(position));//传object回去
    }
    @Override
    public int getItemCount() {
        return mDatas.size();
    }

    @Override
    public void onClick(View v) {
        if (onItemClickListener != null) {
            //注意这里使用getTag方法获取数据
            onItemClickListener.onItemClick(v,(MallShopCartBean.Data.CartItemResultDtoList) v.getTag());
        }
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        ImageView item_mall_shop_cart_list_iamgeview;
        CheckBox checkBox;
        TextView item_mall_shop_cart_list_title,item_mall_shop_cart_list_pecification,item_mall_shop_cart_list_price,item_mall_shop_cart_list_number;
        ImageView item_mall_shop_cart_list_minus_button,item_mall_shop_cart_list_add_button;
        public MyViewHolder(View view) {
            super(view);
            checkBox=view.findViewById(R.id.item_mall_shop_cart_list_checkbox);
            item_mall_shop_cart_list_iamgeview=view.findViewById(R.id.item_mall_shop_cart_list_iamgeview);
            item_mall_shop_cart_list_title =view.findViewById(R.id.item_mall_shop_cart_list_title);
            item_mall_shop_cart_list_pecification =view.findViewById(R.id.item_mall_shop_cart_list_pecification);
            item_mall_shop_cart_list_price =view.findViewById(R.id.item_mall_shop_cart_list_price);
            item_mall_shop_cart_list_minus_button=view.findViewById(R.id.item_mall_shop_cart_list_minus_button);
            item_mall_shop_cart_list_add_button=view.findViewById(R.id.item_mall_shop_cart_list_add_button);
            item_mall_shop_cart_list_number=view.findViewById(R.id.item_mall_shop_cart_list_number);
        }
    }
    public interface OnRecyclerViewItemClickListener {
        void onItemClick(View view , MallShopCartBean.Data.CartItemResultDtoList data);
    }
    public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
        this.onItemClickListener = listener;
    }
    public void setAllselect(boolean b){
        for(int i=0;i<mDatas.size();i++){
            mDatas.get(i).setChecked(b);
        }
    }
}

这样就差不多了，刷新ui用的eventBus这个库感觉比广播好用很多，推荐大家用

compile 'org.greenrobot:eventbus:3.0.0'

demo里用的网络请求是

compile 'com.zhy:okhttputils:2.6.2'

gson解析库

compile 'com.google.code.gson:gson:2.8.2'

图片加载库

compile 'com.github.bumptech.glide:glide:4.0.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.0.0'

代码也不复杂，重要的地方都加了注释，基本能满足普通的购物车需求，可能有部分逻辑有点问题，需要你们自己在测试的时候去优化，毕竟只是demo没考虑很全，其实最容易出问题的地方是在选中跟没选中的处理上，我是在实体内加了一个boolean，用来记录选中状态，目前项目的购物车数据是存在后台数据库，所以列表需要网络请求获取，相关操作也要请求网络，如果你们的项目中购物车没有写在后台，商品数据可以存本地数据库，从本地数据库读取购物车的商品列表，增删改都直接本地操作比较性能会比较好。