添加购物车

购物车Activity

package com.example.yuekaomoni01.activity;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.Orientati er;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

import com.example.yuekaomoni01.R;
import com.example.yuekaomoni01.adaper.ShoppAdaper;
import com.example.yuekaomoni01.api.Apis;
import com.example.yuekaomoni01.bean.ShoppCarBean;
import com.example.yuekaomoni01.presenter.PresenterImpl;
import com.example.yuekaomoni01.view.Iview;

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

public class ShoppCarActivity extends AppCompatActivity implements Iview {

    private PresenterImpl presenter;
    private RecyclerView recyclerView;
    private CheckBox query;
    private TextView text_total;
    private TextView text_shopp;
    private ShoppAdaper adaper;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_shoppcar);
        presenter = new PresenterImpl(this);
        initView();
    }

    private void initView() {
        //获取资源id
        recyclerView = findViewById(R.id.recycle_view);
        query = findViewById(R.id.query);
        text_total = findViewById(R.id.text_total);
        text_shopp = findViewById(R.id.text_shopp);
        //1为不选中
        query.setTag(1);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(Orientati er.VERTICAL);
        recyclerView.setLayoutManager(layoutManager);
        //创建适配器
        adaper = new ShoppAdaper(this);
        recyclerView.setAdapter(adaper);
        //调用适配器里的接口
        adaper.setUpdateListener(new ShoppAdaper.UpdateListener() {
            @Override
            public void setTotal(String total, String num, boolean allCheck) {
                //设置ui的改变
                text_shopp.setText(\"共\"+num+\"件商品\");
                text_total.setText(\"总价:￥\"+total+\"元\");
                if(allCheck){
                    query.setTag(2);
                }else{
                    query.setTag(1);
                }
                query.setChecked(allCheck);
            }
        });
        //这里只做ui更改, 点击全选按钮,,调到adapter里面操作
        query.set Listener(new View. Listener() {
            @Override
            public void  (View v) {
                //调用adapter里面的方法 ,,把当前quanxuan状态传递过去
                int tag = (int) query.getTag();
                if(tag == 1){
                    query.setTag(2);
                }else{
                    query.setTag(1);
                }
                adaper.queryAll(query.isChecked());
            }
        });
        //请求网址
        Map<String,String> map = new HashMap<>();
        map.put(\"uid\",\"23027\");
        presenter.startRequest(Apis.URL_CAR_COUNT,map,ShoppCarBean.class);
    }

    @Override
    public void requestData(  o) {
        if(o instanceof ShoppCarBean){
            ShoppCarBean bean = (ShoppCarBean) o;
            if(bean==null || !bean.isSuccess()){
                Toast.makeText(ShoppCarActivity.this,bean.getMsg(),Toast.LENGTH_SHORT).show();
            }else{
                adaper.add(bean);
            }
        }
    }

    @Override
    public void requestFail(  o) {
        if(o instanceof Exception){
            Exception e = (Exception) o;
            e.printStackTrace();
        }
        Toast.makeText(ShoppCarActivity.this,\"网络请求错误\",Toast.LENGTH_SHORT).show();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenter.onDetach();
    }
}

适配器

package com.example.yuekaomoni01.adaper;

import android.content.Context;
import android.support.annotation.NonNull;
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.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.example.yuekaomoni01.R;
import com.example.yuekaomoni01.bean.ShoppCarBean;
import com.example.yuekaomoni01.custom.CarCuctomView;

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

public class ShoppAdaper extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private Context mContext;
    private List<ShoppCarBean.DataBean.ListBean> list;
    //存放商家id和商家名称的map集合
    private Map<String,String> map = new HashMap<>();
    public ShoppAdaper(Context mContext) {
        this.mContext = mContext;
    }
    /**
     * 添加数据并更新显示
     * */
    public void add(ShoppCarBean shoppBean){
        //传进来的是bean对象
        if(list == null){
            list = new ArrayList<>();
        }
        //第一层遍历商家和商品
        for(ShoppCarBean.DataBean bean:shoppBean.getData()){
            //把商品的id和商品的名称添加到map集合里 ,,为了之后方便调用
            map.put(bean.getSellerid(),bean.getSellerName());
            //第二层遍历里面的商品
            for(int i = 0;i<bean.getList().size();i++){
                //添加到list集合里
                list.add(bean.getList().get(i));
            }
        }
        //调用方法 设置显示或隐藏 商铺名
        setFirst(list);
        notifyDataSetChanged();
    }
    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.shopp_car_item1,viewGroup,false);
        MyViewHolder viewHolder = new MyViewHolder(view);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, final int i) {
        /**
         * 设置商铺的 shop_checkbox和商铺的名字 显示或隐藏
         * */
        final MyViewHolder holder = (MyViewHolder) viewHolder;
        if(list.get(i).getIsFirst() == 1){
            //显示商家
            holder.shop_check.setVisibility(View.VISIBLE);
            holder.shopp_commodity.setVisibility(View.VISIBLE);
            //设置选中状态
            holder.shop_check.setChecked(list.get(i).isShop_check());
            holder.shopp_commodity.setText(map.get(String.valueOf(list.get(i).getSellerid())));
        }else{
            //隐藏
            holder.shop_check.setVisibility(View.GONE);
            holder.shopp_commodity.setVisibility(View.GONE);
        }
        //拆分images字段
        String[] str = list.get(i).getImages().split(\"\\\\|\");
        //设置商品的图片
        Glide.with(mContext).load(str[0]).into(holder.item_image);
        //控制商品的checkbox，根据字段改变
        holder.item_check.setChecked(list.get(i).isItem_check());
        holder.item_name.setText(list.get(i).get ());
        holder.item_price.setText(list.get(i).getPrice()+\"\");
        //调用customview里的方法设置加减号中间的数字
        holder.custom.setEditText(list.get(i).getNum());
        //商铺的shop_checkbox点击事件 ,控制商品的item_checkbox
        holder.shop_check.set Listener(new View. Listener() {
            @Override
            public void  (View v) {
                //先改变数据源中的shop_check
                list.get(i).setShop_check(holder.shop_check.isChecked());
                for(int a = 0;a<list.size();a++){
                    //如果是同一家商铺的 都给成相同状态
                    if(list.get(i).getSellerid() == list.get(a).getSellerid()){
                        //当前条目的选中状态 设置成 当前商铺的选中状态
                        list.get(a).setItem_check(holder.shop_check.isChecked());
                    }
                }
                //刷新适配器
                notifyDataSetChanged();
                //调用求和的方法
                sum(list);
            }
        });
        //商品的item_checkbox点击事件,控制商铺的shop_checkbox
        holder.item_check.set Listener(new View. Listener() {
            @Override
            public void  (View v) {
                //先改变数据源中的item_checkbox
                list.get(i).setItem_check(holder.item_check.isChecked());
                //反向控制商铺的shop_checkbox
                for(int s = 0;s<list.size();s++){
                    for(int j = 0;j<list.size();j++){
                        //如果两个商品是同一家店铺的 并且 这两个商品的item_checkbox选中状态不一样
                        if(list.get(s).getSellerid() == list.get(j).getSellerid()&&!list.get(j).isItem_check()){
                            //就把商铺的shop_checkbox改成false
                            list.get(s).setShop_check(false);
                            break;
                        }else{
                            //同一家商铺的商品 选中状态都一样,就把商铺shop_checkbox状态改成true
                            list.get(s).setShop_check(true);
                        }
                    }
                }
                //更新适配器
                notifyDataSetChanged();
                //调用求和的方法
                sum(list);
            }
        });
        //删除条目的点击事件
        holder.item_del.set Listener(new View. Listener() {
            @Override
            public void  (View v) {
                //移除集合中的当前数据
                list.remove(i);
                //删除完当前的条目 重新判断商铺的显示隐藏
                setFirst(list);
                //调用重新求和
                sum(list);
                notifyDataSetChanged();
            }
        });
        //加减号的监听,
        holder.custom.setCustomCallBack(new CarCuctomView.CustomCallBack() {
            @Override
            public void callBack(int count) {
                //改变数据源中的数量
                list.get(i).setNum(count);
                notifyDataSetChanged();
                sum(list);
            }

            @Override
            public void shuruzhi(int count) {
                list.get(i).setNum(count);
                notifyDataSetChanged();
                sum(list);
            }
        });
    }
    /**
     * 设置数据源,控制是否显示商家
     * */
    private void setFirst(List<ShoppCarBean.DataBean.ListBean> list) {
        if(list.size()>0){
            //如果是第一条数据就设置isFirst为1
            list.get(0).setIsFirst(1);
            //从第二条开始遍历
            for(int i=1;i<list.size();i++){
                //如果和前一个商品是同一家商店的
                if(list.get(i).getSellerid() == list.get(i-1).getSellerid()){
                    //设置成2不显示商铺
                    list.get(i).setIsFirst(2);
                }else{
                    //设置成1显示商铺
                    list.get(i).setIsFirst(1);
                    //如果当前条目选中,把当前的商铺也选中
                    if(list.get(i).isItem_check() == true){
                        list.get(i).setShop_check(list.get(i).isItem_check());
                    }
                }
            }
        }
    }
    //求和的方法
    private void sum(List<ShoppCarBean.DataBean.ListBean> list) {
        //初始的总价为0
        int totalNum = 0;
        double totalPrice = 0.0;
        boolean allCheck = true;
        for(int i = 0;i<list.size();i++){
            //把 已经选中的 条目 计算价格
            if(list.get(i).isItem_check()){
                totalNum += list.get(i).getNum();
                totalPrice+= list.get(i).getNum()*list.get(i).getPrice();
            }else{
                //如果有个未选中,就标记为false
                allCheck = false;
            }
        }
        //接口回调出去 把总价 总数量 和allcheck 传给view层
        updateListener.setTotal(totalPrice+\"\",totalNum+\"\",allCheck);
    }
    //view层调用这个方法, 点击quanxuan按钮的操作
    public void queryAll(boolean checked){
        for(int i = 0;i<list.size();i++){
            list.get(i).setShop_check(checked);
            list.get(i).setItem_check(checked);
        }
        notifyDataSetChanged();
        sum(list);
    }
    @Override
    public int getItemCount() {
        return list==null?0:list.size();
    }
    public class MyViewHolder extends RecyclerView.ViewHolder{
        public final CheckBox shop_check;
        public final TextView shopp_commodity;
        public final CheckBox item_check;
        public final ImageView item_image;
        public final TextView item_name;
        public final TextView item_price;
        public final CarCuctomView custom;
        public final ImageView item_del;
        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            shop_check = itemView.findViewById(R.id.shop_check);
            shopp_commodity = itemView.findViewById(R.id.shopp_commodity);
            item_check = itemView.findViewById(R.id.item_check);
            item_image = itemView.findViewById(R.id.item_image);
            item_name = itemView.findViewById(R.id.item_name);
            item_price = itemView.findViewById(R.id.item_price);
            custom = itemView.findViewById(R.id.custom);
            item_del = itemView.findViewById(R.id.item_del);
        }
    }
    private UpdateListener updateListener;
    public void setUpdateListener(UpdateListener updateListener){
        this.updateListener = updateListener;
    }
    //定义接口
    public interface UpdateListener{
        void setTotal(String total,String num,boolean allCheck);
    }
}

适配器的

<?  version=\"1.0\" encoding=\"utf-8\"?>
<LinearLayout
     ns:android=\"http://schemas.android.com/apk/res/android\"
    android:layout_width=\"match_parent\"
    android:layout_height=\"wrap_content\"
    android:orientation=\"vertical\"
    android:padding=\"15dp\"
    >
    <LinearLayout
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:orientation=\"horizontal\"
        >
        <CheckBox
            android:id=\"@+id/shop_check\"
            android:layout_width=\"50dp\"
            android:layout_height=\"50dp\" />
        <TextView
            android:id=\"@+id/shopp_commodity\"
            android:layout_width=\"wrap_content\"
            android:layout_height=\"wrap_content\"
            android:layout_marginLeft=\"20dp\"
            android:text=\"shopp_commodity\"
            android:textSize=\"24sp\"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:orientation=\"horizontal\"
        android:gravity=\"center_vertical\"
        >
        <CheckBox
            android:id=\"@+id/item_check\"
            android:layout_width=\"wrap_content\"
            android:layout_height=\"wrap_content\" />
        <ImageView
            android:id=\"@+id/item_image\"
            android:layout_width=\"120dp\"
            android:layout_height=\"120dp\"
            android:src=\"@mipmap/ic_launcher\"
            />
        <LinearLayout
            android:layout_width=\"wrap_content\"
            android:layout_height=\"match_parent\"
            android:layout_marginLeft=\"10dp\"
            android:orientation=\"vertical\"
            android:layout_weight=\"1\"
            >
            <TextView
                android:id=\"@+id/item_name\"
                android:layout_width=\"wrap_content\"
                android:layout_height=\"0dp\"
                android:layout_weight=\"1\"
                android:textSize=\"18sp\"
                android:text=\"name\"
                android:maxLines=\"2\"
                />
            <TextView
                android:id=\"@+id/item_price\"
                android:layout_width=\"wrap_content\"
                android:layout_height=\"0dp\"
                android:layout_weight=\"1\"
                android:textSize=\"18sp\"
                android:text=\"price\"
                android:textColor=\"#f00\"
                />
            <com.example.yuekaomoni01.custom.CarCuctomView
                android:id=\"@+id/custom\"
                android:layout_width=\"wrap_content\"
                android:layout_height=\"0dp\"
                android:layout_weight=\"1\"
                />
        </LinearLayout>
        <ImageView
            android:id=\"@+id/item_del\"
            android:layout_width=\"30dp\"
            android:layout_height=\"30dp\"
            android:layout_marginRight=\"10dp\"
            android:src=\"@drawable/ic_del_name\"
            />
    </LinearLayout>
</LinearLayout>

Activity 的

<?  version=\"1.0\" encoding=\"utf-8\"?>
<android.support.constraint.ConstraintLayout  ns:android=\"http://schemas.android.com/apk/res/android\"
    android:layout_width=\"match_parent\"
    android:layout_height=\"match_parent\"
     ns:app=\"http://schemas.android.com/apk/res-auto\">
    <ImageView
        android:id=\"@+id/car_image\"
        android:layout_width=\"40dp\"
        android:layout_height=\"40dp\"
        app:layout_constraintLeft_toLeftOf=\"parent\"
        app:layout_constraintTop_toTopOf=\"parent\"
        android:src=\"@drawable/ic_left_name\"
        />
    <TextView
        android:id=\"@+id/car_text\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
       app:layout_constraintLeft_toLeftOf=\"parent\"
        app:layout_constraintRight_toRightOf=\"parent\"
        app:layout_constraintTop_toTopOf=\"@id/car_image\"
        app:layout_constraintBottom_toBottomOf=\"@id/car_image\"
        android:textSize=\"20sp\"
        android:textColor=\"#000\"
        android:text=\"购物车\"
        />
    <android.support.v7.widget.RecyclerView
        android:id=\"@+id/recycle_view\"
        android:layout_width=\"0dp\"
        android:layout_height=\"0dp\"
        app:layout_constraintLeft_toLeftOf=\"parent\"
        app:layout_constraintRight_toRightOf=\"parent\"
        app:layout_constraintTop_toBottomOf=\"@id/car_image\"
        app:layout_constraintBottom_toTopOf=\"@id/text_jiesuan\"
        />
    <CheckBox
        android:id=\"@+id/query\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        app:layout_constraintLeft_toLeftOf=\"parent\"
        app:layout_constraintTop_toBottomOf=\"@id/recycle_view\"
        app:layout_constraintBottom_toBottomOf=\"parent\"
        />
    <TextView
        android:id=\"@+id/text_query\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        app:layout_constraintLeft_toRightOf=\"@id/query\"
        app:layout_constraintBottom_toBottomOf=\"@id/query\"
        app:layout_constraintTop_toTopOf=\"@id/query\"
        android:textSize=\"20sp\"
        android:text=\"全选/反选\"
        />
    <TextView
        android:id=\"@+id/text_total\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        app:layout_constraintTop_toBottomOf=\"@id/recycle_view\"
        app:layout_constraintLeft_toRightOf=\"@id/text_query\"
        android:layout_marginLeft=\"10dp\"
        android:text=\"总价:￥0元\"
        android:textColor=\"#f00\"
        android:textSize=\"18sp\"
        />
    <TextView
        android:id=\"@+id/text_shopp\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        app:layout_constraintTop_toBottomOf=\"@id/text_total\"
        app:layout_constraintLeft_toRightOf=\"@id/text_query\"
        app:layout_constraintBottom_toBottomOf=\"parent\"
        android:layout_marginLeft=\"10dp\"
        android:text=\"共0件商品\"
        android:textSize=\"18sp\"
        />
    <TextView
        android:id=\"@+id/text_jiesuan\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        app:layout_constraintTop_toBottomOf=\"@id/recycle_view\"
        app:layout_constraintBottom_toBottomOf=\"parent\"
        app:layout_constraintRight_toRightOf=\"parent\"
        android:text=\"去结算\"
        android:textSize=\"26sp\"
        android:background=\"@drawable/button_shape\"
        android:gravity=\"center\"
        />
</android.support.constraint.ConstraintLayout>

APIs

package com.example.yuekaomoni01.api;

public class Apis {
    public static final String URL_SHOW=\"http://www.zhaoapi.cn/product/searchProducts\";
    public static final String URL_CAR=\"http://www.zhaoapi.cn/product/addCart\";
    public static final String URL_CAR_COUNT=\"http://www.zhaoapi.cn/product/getCarts\";
    //?keywords=%E6%89%8B%E6%9C%BA&page=1&sort=0
}

OKHttp

package com.example.yuekaomoni01.util;

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

import com.google.gson.Gson;

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

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

public class OkHttpUtils {
    private static OkHttpUtils intance;
    private final OkHttpClient httpClient;
    private Handler handler = new Handler(Looper.myLooper());
    public OkHttpUtils() {
        //日志拦截器
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        httpClient = new OkHttpClient.Builder()
                .connectTimeout(10,TimeUnit.SECONDS)
                .readTimeout(10,TimeUnit.SECONDS)
                .writeTimeout(10,TimeUnit.SECONDS)
                .addInterceptor(interceptor)
                .build();
    }

    public static OkHttpUtils getIntance() {
        if(intance == null){
            synchronized (OkHttpUtils.class){
                intance = new OkHttpUtils();
            }
        }
        return intance;
    }
    /**
     * 异步get请求
     * */
    public void doGet(String url, String params, final Class clazz, final ICallBack iCallBack){
        Request request = new Request.Builder()
                .url(url)
                .get()
                .build();
        Call call = httpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
               handler.post(new Runnable() {
                   @Override
                   public void run() {
                       iCallBack.faniled(e);
                   }
               });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                try {
                    String result = response.body().string();
                    Gson gson = new Gson();
                    final   o = gson.fromJson(result, clazz);
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            iCallBack.success(o);
                        }
                    });
                }catch (Exception e){
                    iCallBack.faniled(e);
                }
            }
        });
    }
    /**
     * 异步post请求
     * */
    public void doPost(String url, Map<String,String> map, final Class clazz, final ICallBack iCallBack){
        FormBody.Builder builder = new FormBody.Builder();
        for(Map.Entry<String,String> entry:map.entrySet()){
            builder.add(entry.getKey(),entry.getValue());
        }
        RequestBody body = builder.build();
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        Call call = httpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, final IOException e) {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        iCallBack.faniled(e);
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                    try {
                        String result = response.body().string();
                        Gson gson = new Gson();
                        final   o = gson.fromJson(result, clazz);
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                iCallBack.success(o);
                            }
                        });
                    }catch (Exception e){
                        iCallBack.faniled(e);
                    }
            }
        });
    }
}