一级购物车代码

////////////////////////////////////////需要的属性

package com.bwei.listview.bean;
public class GoodsBean {

    private String childTitle;
    private boolean checkchild;
    private String img;
    private double price;
    private int num;
    private boolean btn;

    public GoodsBean(String childTitle, boolean checkchild, String img, double price, int num, boolean btn) {
        this.childTitle = childTitle;
        this.checkchild = checkchild;
        this.img = img;
        this.price = price;
        this.num = num;
        this.btn = btn;
    }

    public String getChildTitle() {
        return childTitle;
    }

    public void setChildTitle(String childTitle) {
        this.childTitle = childTitle;
    }

    public boolean isCheckchild() {
        return checkchild;
    }

    public void setCheckchild(boolean checkchild) {
        this.checkchild = checkchild;
    }

    public String getImg() {
        return img;
    }

    public void setImg(String img) {
        this.img = img;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public boolean isBtn() {
        return btn;
    }

    public void setBtn(boolean btn) {
        this.btn = btn;
    }

    @Override
    public String toString() {
        return "GoodsChilde{" +
                "childTitle='" + childTitle + '\'' +
                ", checkchild=" + checkchild +
                ", img='" + img + '\'' +
                ", price=" + price +
                ", num=" + num +
                ", btn=" + btn +
                '}';
    }
}

///////////////////////////////////////////////////接口

public interface CallBack {
    void onSuccess(String tag,Object o);
    void onFailed(Exception e);
}
////////////////////////////////////////////////////接口

public interface Iv {
    void onSuccess(List<GoodsBean> list);
    void onFiled( Exception e);
}
/////////////////////////////////////////////////////自定义View

package com.bwei.listview.myview;

/**
 * Created by HQ on 2017/11/21.
 */


import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.bwei.listview.R;


/**
 * 作者
 * on 2017/11/18 10:49
 */

public class AddDeleteView extends LinearLayout {
    private OnAddDelClickListener listener;
    private EditText etNumber;

    //对外提供一个点击的回调接口
    public interface OnAddDelClickListener{
        void onAddClick(View v);
        void onDelClick(View v);
    }

    public void setOnAddDelClickListener(OnAddDelClickListener listener){
        if(listener!=null){
            this.listener=listener;
        }
    }

    public AddDeleteView(Context context) {
        this(context,null);
    }

    public AddDeleteView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public AddDeleteView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context, attrs, defStyleAttr);
    }

    private void initView(Context context, AttributeSet attrs, int defStyleAttr) {
        View.inflate(context, R.layout.layout_add_delete,this);

        //获取控件
        TextView txtDelete=findViewById(R.id.txt_delete);
        TextView txtAdd=findViewById(R.id.txt_add);
        etNumber = findViewById(R.id.et_number);


        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AddDeleteViewStyle);

        String leftText = typedArray.getString(R.styleable.AddDeleteViewStyle_left_text);
        String rightText = typedArray.getString(R.styleable.AddDeleteViewStyle_right_text);
        String middleText = typedArray.getString(R.styleable.AddDeleteViewStyle_middle_text);
        int color = typedArray.getColor(R.styleable.AddDeleteViewStyle_left_text_color, Color.BLACK);

        txtDelete.setText(leftText);
        txtAdd.setText(rightText);
        etNumber.setText(middleText);
        txtDelete.setTextColor(color);

        //回收
        typedArray.recycle();


        txtDelete.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onDelClick(view);
            }
        });

        txtAdd.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onAddClick(view);
            }
        });

    }
    //对外提供一个修改数字的方法
    public void setNumber(int number){
        if(number>0){
            etNumber.setText(number+"");
        }
    }
    //对外提供一个获取当前数字的方法
    public int getNumber(){
        String string = etNumber.getText().toString();
        int i = Integer.parseInt(string);
        return i;
    }
}

///////////////////////////////////////////////////////P层

package com.bwei.listview.presenter;
import android.content.Context;
import android.util.Log;
import com.bwei.listview.MainActivity;
import com.bwei.listview.bean.Bean;
import com.bwei.listview.bean.GoodsBean;
import com.bwei.listview.model.CallBack;
import com.bwei.listview.model.HttpUtils;
import com.bwei.listview.model.Iv;
import java.util.HashMap;
import java.util.List;

/**
 * Created by  on 2017/11/21.
 */

public class Presenter {
    private Context context;
    private Iv iv;
    private List<GoodsBean> list;

    public Presenter(Context context, Iv iv, List<GoodsBean> list) {
        this.context = context;
        this.iv = iv;
        this.list = list;
    }

    public void Goods() {
        HashMap<String, String> map = new HashMap<>();
        HttpUtils.getInstance().post("http://120.27.23.105/product/getCarts?uid=100", map, new CallBack() {
            @Override
            public void onSuccess(String tag, Object o) {
                Bean bean = (Bean) o;
                List<Bean.DataBean> data = bean.getData();
                 for(int i=0;i<data.size();i++){
                     List<Bean.DataBean.ListBean> list1 = data.get(i).getList();
                     for(int j=0;j<list1.size();j++){
                         double price = list1.get(j).getBargainPrice();
                         String images = list1.get(j).getImages();
                         String title = list1.get(j).getTitle();
                         list.add(new GoodsBean(title,false,images,price,1,false));
                     }
                     Log.e("hhh", list.toString());
                 }
                iv.onSuccess(list);

            }

            @Override
            public void onFailed(Exception e) {

            }
        },Bean.class,"hh");
    }
    }

///////////////////////////////////////////适配器

package com.bwei.listview.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.bwei.listview.MainActivity;
import com.bwei.listview.R;
import com.bwei.listview.bean.GoodsBean;
import com.bwei.listview.myview.AddDeleteView;
import java.util.List;
import static android.R.attr.checked;

/**
 * Created by on 2017/11/22.
 */

public class GoodsAdapter extends BaseAdapter {

    private Context context;
    private List<GoodsBean> list;
    MainActivity con;

    private View view;

    public GoodsAdapter(Context context, List<GoodsBean> list) {
        this.context = context;
        this.list = list;
        con=(MainActivity)context;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(final int i, View view, ViewGroup viewGroup) {
         final ChildViewHolder holder;
        if(view==null){

            holder =new ChildViewHolder();
            view = view.inflate(context, R.layout.ex_child_item, null);
            holder.ch2=view.findViewById(R.id.child_checkbox);//子级的选择框
            holder.title=view.findViewById(R.id.shop_title);//子级的标题
            holder.img=view.findViewById(R.id.shop_img);//图片
            holder.et_number=view.findViewById(R.id.et_number);//加减中间的数量
            holder.price=view.findViewById(R.id.shop_price);//价格
            holder.txt_delete=view.findViewById(R.id.txt_delete);//加减器的减
            holder.txt_add=view.findViewById(R.id.txt_add);//加减器的加
            holder.txt_delete.setText("-");//设置显示减号
            holder.txt_add.setText("+");//设置显示加号
            holder.jiajia=view.findViewById(R.id.adv);//设置显示加减器
            holder.jiajia.setNumber(list.get(i).getNum());//自定义view修改数字的方法
            holder.btn=view.findViewById(R.id.shop_delete);//删除的按钮
            view.setTag(holder);
        }else{
            holder=(ChildViewHolder)view.getTag();

        }
        holder.jiajia.setOnAddDelClickListener(new AddDeleteView.OnAddDelClickListener() {
            @Override
            public void onAddClick(View v) {
                int number = holder.jiajia.getNumber();
                number++;
                holder.jiajia.setNumber(number);
                list.get(i).setNum(number);
                con.changesum(list);//计算的方法
            }

            @Override
            public void onDelClick(View v) {
                int number = holder.jiajia.getNumber();
                number--;
                holder.jiajia.setNumber(number);
                list.get(i).setNum(number);
                con.changesum(list);
            }
        });
        holder.ch2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                boolean checked = holder.ch2.isChecked();
                list.get(i).setCheckchild(checked);
                //获取到Activity
                MainActivity con=(MainActivity)context;
                for(int i=0;i<list.size();i++){
                    boolean checkchild = list.get(i).isCheckchild();
                    if(!checkchild){
                        con.all_checKbox.setChecked(false);
                        break;
                    }else{
                        con.all_checKbox.setChecked(true);
                    }

                }

                con.changesum(list);
            }


        });


        holder.ch2.setChecked(list.get(i).isCheckchild());
        holder.title.setText(list.get(i).getChildTitle());
        String img = list.get(i).getImg();
        String[] split = img.split("\\|");
        Glide.with(context).load(split[0]).into(holder.img);
        holder.price.setText(list.get(i).getPrice()+"");
        return view;
    }

     class ChildViewHolder {

         CheckBox ch2;
         TextView title;
         ImageView img;
         TextView price;
         TextView txt_delete;
         TextView et_number;
         TextView txt_add;
         AddDeleteView jiajia;
         Button btn;
    }
}

/////////////////////////////////////////////////MainActivity

package com.bwei.listview;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import com.bwei.listview.adapter.GoodsAdapter;
import com.bwei.listview.bean.GoodsBean;
import com.bwei.listview.model.Iv;
import com.bwei.listview.presenter.Presenter;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements Iv {

    private ListView listView;
    public CheckBox all_checKbox;
    private TextView total_price;
    private TextView total_number;
    private TextView pay;
    private TextView edit;
    List<GoodsBean> list = new ArrayList<GoodsBean>();
    private Presenter presenter;
    private GoodsAdapter adapter;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = (ListView) findViewById(R.id.listView);
        all_checKbox = (CheckBox) findViewById(R.id.all_chekbox);
        total_price = (TextView) findViewById(R.id.total_price);
        total_number = (TextView) findViewById(R.id.total_number);
        pay = (TextView) findViewById(R.id.tv_go_to_pay);
        edit = (TextView) findViewById(R.id.edit);

        presenter = new Presenter(MainActivity.this, this, list);
        presenter.Goods();
        //全选按钮的点击事件
        all_checKbox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //获取到全选按钮的状态
                boolean checked = all_checKbox.isChecked();
                for (GoodsBean i : list) {
                    i.setCheckchild(checked);
                }
                //刷新适配器
                adapter.notifyDataSetChanged();
                //计算的方法
                changesum(list);
            }

        });
    }

    //计算的逻辑
    public void changesum(List<GoodsBean> goodsbean) {
        double sum = 0;
        int count = 0;
        for (int i = 0; i < goodsbean.size(); i++) {
            boolean childCb1 = goodsbean.get(i).isCheckchild();
            if (childCb1) {
                double price = goodsbean.get(i).getPrice();
                int num = goodsbean.get(i).getNum();
                sum += num * price;
                count += num;
            }
        }
        total_price.setText("¥:" + sum);
        total_number.setText("共计有"+count+"件商品");
    }
    

    @Override
    public void onSuccess(List<GoodsBean> list) {
        adapter = new GoodsAdapter(this, list);
        listView.setAdapter(adapter);
        adapter.notifyDataSetChanged();
    }

    @Override
    public void onFiled(Exception e) {

    }
}