shoppingcart

maimactivity页面

main_activity.xml布局

---

<?xml version="1.0" encoding="utf-8"?>

    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.umeng.soexample.shopcat01.MainActivity">

    android:id="@+id/elc_show_main"

    android:layout_width="match_parent"

    android:layout_height="0dp"

    android:layout_weight="1"

    android:background="#fff"

    >

        android:layout_width="match_parent"

        android:layout_height="60dp"

        android:gravity="center_vertical"

        android:orientation="horizontal"

        >

            android:id="@+id/cb_allCheck_main"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content" />

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="全选"

            android:textColor="#000"

            />

            android:id="@+id/btn_allprice_main"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_marginLeft="10dp"

            android:layout_weight="1"

            android:text="价格"

            android:textColor="@color/colorAccent"

            android:textSize="20sp"

            />

            android:id="@+id/btn_allNumber_main"

            android:layout_width="120dp"

            android:layout_height="wrap_content"

            android:text="去结算(0)"

            />

mainactivity页面

package com.umeng.soexample.shopcat01;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.ExpandableListView;

import android.widget.TextView;

import com.google.gson.Gson;

import com.umeng.soexample.shopcat01.adapter.MyAdapter;

import com.umeng.soexample.shopcat01.bean.CartInfo;

import java.io.IOException;

import java.util.List;

import okhttp3.Call;

import okhttp3.Callback;

import okhttp3.OkHttpClient;

import okhttp3.Request;

import okhttp3.Response;

public class MainActivityextends AppCompatActivityimplements View.OnClickListener{

Stringurl ="http://www.zhaoapi.cn/product/getCarts?uid=71";

private ExpandableListViewelc_show_main;

private CheckBoxcb_allCheck_main;

private TextViewbtn_allPrice_main;

private Buttonbtn_allNumber_main;

private MyAdaptermyAdapter;

@Override

    protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initData();

}

private void initData() {

//得到okhttp

        OkHttpClient okHttpClient =new OkHttpClient.Builder().build();

Request request =new Request.Builder().url(url).build();

okHttpClient.newCall(request).enqueue(new Callback() {

@Override

            public void onFailure(Call call, IOException e) {

}

@Override

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

final String string = response.body().string();

runOnUiThread(new Runnable() {

private ListsellerData;

@Override

                    public void run() {

Gson gson =new Gson();

CartInfo cartInfo = gson.fromJson(string, CartInfo.class);

sellerData = cartInfo.getData();

//创建适配

//创建适配

                        myAdapter =new MyAdapter(sellerData,MainActivity.this);

//调用适配器的借口 来实现回电数据

                        myAdapter.setOnCartListChangeListener(new MyAdapter.OnCartListChangeListener() {

@Override

                            public void SellerSelectedChange(int groupPosition) {

//先得到 checkbox

                                boolean b =myAdapter.isCurrentSellerAllProductSelected(groupPosition);

//改变所有当前商家的选中状态

                                myAdapter.changeCurrentSellerAllProductSelected(groupPosition,!b);

myAdapter.notifyDataSetChanged();

refreshAllSelectedAndTotalPriceAndTotalNumber();

}

@Override

                            public void changeCurrentProductSelected(int groupPosition,int childPosition) {

myAdapter.changeCurrentProductSelected(groupPosition,childPosition);

myAdapter.notifyDataSetChanged();

refreshAllSelectedAndTotalPriceAndTotalNumber();

}

@Override

                            public void ProductNumberChange(int groupPosition,int childPosition,int number) {

myAdapter.changeCurrentProductNumber(groupPosition,childPosition,number);

myAdapter.notifyDataSetChanged();

//刷新底部的方法

                                refreshAllSelectedAndTotalPriceAndTotalNumber();

}

});

elc_show_main.setAdapter(myAdapter);

//

                        for (int i =0; i

elc_show_main.expandGroup(i);

}

}

});

}

});

}

private void initView() {

elc_show_main = (ExpandableListView) findViewById(R.id.elc_show_main);

cb_allCheck_main = (CheckBox) findViewById(R.id.cb_allCheck_main);

btn_allPrice_main = (TextView) findViewById(R.id.btn_allprice_main);

btn_allNumber_main = (Button) findViewById(R.id.btn_allNumber_main);

cb_allCheck_main.setOnClickListener(this);

btn_allNumber_main.setOnClickListener(this);

}

private void  refreshAllSelectedAndTotalPriceAndTotalNumber(){

boolean allProductsSelected =myAdapter.isAllProductsSelected();

cb_allCheck_main.setChecked(allProductsSelected);

//计算总金额

        Double totalPrice =myAdapter.calculateTotalPrice();

btn_allPrice_main.setText("总价：￥"+totalPrice);

//计算总数量

        int totalNumber =myAdapter.calculateTotalNumber();

btn_allNumber_main.setText("去结算("+totalNumber+")");

}

@Override

    public void onClick(View v) {

switch (v.getId()) {

case R.id.btn_allNumber_main:

break;

case R.id.cb_allCheck_main:

boolean allProductsSelected =myAdapter.isAllProductsSelected();

myAdapter.changeAllProductsSelected(!allProductsSelected);

myAdapter.notifyDataSetChanged();

//刷新底部的方法

                refreshAllSelectedAndTotalPriceAndTotalNumber();

break;

}

}

}

MyAdapter页面

package com.umeng.soexample.shopcat01.adapter;

import android.content.Context;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseExpandableListAdapter;

import android.widget.CheckBox;

import android.widget.ImageView;

import android.widget.TextView;

import com.bumptech.glide.Glide;

import com.squareup.picasso.Picasso;

import com.umeng.soexample.shopcat01.MyAddSubView;

import com.umeng.soexample.shopcat01.R;

import com.umeng.soexample.shopcat01.bean.CartInfo;

import java.util.List;

/**

* Created by lenovo on 2018-11-20.

*/

public class MyAdapterextends BaseExpandableListAdapter{

ListsellerData;

Contextcontext;

public MyAdapter(List sellerData, Context context) {

this.sellerData = sellerData;

this.context = context;

}

@Override

    public int getGroupCount() {

return sellerData.size();

}

@Override

    public int getChildrenCount(int groupPosition) {

return sellerData.get(groupPosition).getList().size();

}

@Override

    public Object getGroup(int groupPosition) {

return null;

}

@Override

    public Object getChild(int groupPosition,int childPosition) {

return null;

}

@Override

    public long getGroupId(int groupPosition) {

return 0;

}

@Override

    public long getChildId(int groupPosition,int childPosition) {

return 0;

}

@Override

    public boolean hasStableIds() {

return false;

}

//设置外层

    @Override

    public View getGroupView(final int groupPosition,boolean isExpanded, View convertView, ViewGroup parent) {

GroupViewHolder groupViewHolder =null;

if (convertView ==null){

groupViewHolder =new GroupViewHolder();

convertView = View.inflate(context, R.layout.group_view_layout_shopcar,null);

groupViewHolder.cb_group_item = convertView.findViewById(R.id.cb_group_item);

groupViewHolder.tv_title_group = convertView.findViewById(R.id.tv_title_group);

convertView.setTag(groupViewHolder);

}else {

groupViewHolder = (GroupViewHolder) convertView.getTag();

}

//赋值

        CartInfo.DataBean dataBean =sellerData.get(groupPosition);

//商家名称

        groupViewHolder.tv_title_group.setText(dataBean.getSellerName());

boolean b = isCurrentSellerAllProductSelected(groupPosition);

//商家的checkbox

        groupViewHolder.cb_group_item.setChecked(b);

//点击checkbox触发监听

        groupViewHolder.cb_group_item.setOnClickListener(new View.OnClickListener() {

@Override

            public void onClick(View v) {

if (onCartListChangeListener !=null) {

onCartListChangeListener.SellerSelectedChange(groupPosition);

}

}

});

return convertView;

}

public void changeCurrentSellerAllProductSelected(int Position,boolean b) {

List list =sellerData.get(Position).getList();

for (int i =0; i < list.size(); i++) {

list.get(i).setSelected(b ?1 :0);

}

}

//用来判断外层的Selected值 如果是0 不选中 否则选中

    public boolean isCurrentSellerAllProductSelected(int position) {

List list =sellerData.get(position).getList();

for (int i =0; i < list.size(); i++) {

if (list.get(i).getSelected() ==0) {

return false;

}

}

return true;

}

//设置子层

    @Override

    public View getChildView(final int groupPosition,final int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {

ChildViewHolder childViewHolder =null;

if (convertView ==null) {

childViewHolder =new ChildViewHolder();

convertView = View.inflate(context, R.layout.child_view_layout_shopcar,null);

childViewHolder.cb_child_item = convertView.findViewById(R.id.cb_child_item);

childViewHolder.tv_title_child = convertView.findViewById(R.id.tv_title_child);

childViewHolder.tv_price_child = convertView.findViewById(R.id.tv_price_child);

childViewHolder.iv_icon_child= convertView.findViewById(R.id.iv_icon_child);

childViewHolder.add_sub_view_child = convertView.findViewById(R.id.add_sub_view_child);

convertView.setTag(childViewHolder);

}else {

childViewHolder = (ChildViewHolder) convertView.getTag();

}

//赋值

        CartInfo.DataBean.ListBean listBean =sellerData.get(groupPosition).getList().get(childPosition);

//商品名称

        childViewHolder.tv_title_child.setText(listBean.getTitle());

//商品图片

        String images = listBean.getImages();

String[] split = images.split("\\|");

Glide.with(context).load(split[0]).into(childViewHolder.iv_icon_child);

//商品价格

        childViewHolder.tv_price_child.setText("￥" + listBean.getPrice());

//商品checkb0x

        childViewHolder.cb_child_item.setChecked(listBean.getSelected() ==1);

childViewHolder.cb_child_item.setOnClickListener(new View.OnClickListener() {

@Override

            public void onClick(View v) {

onCartListChangeListener.changeCurrentProductSelected(groupPosition,childPosition);

}

});

childViewHolder.add_sub_view_child.setOnNumberChangeListener(new MyAddSubView.OnNumberChangeListener() {

@Override

            public void OnNumberChange(int number) {

onCartListChangeListener.ProductNumberChange(groupPosition,childPosition, number);

}

});

return convertView;

}

public void changeCurrentProductNumber(int groupPosition,int childPosition,int number) {

CartInfo.DataBean.ListBean listBean =sellerData.get(groupPosition).getList().get(childPosition);

listBean.setNum(number);

}

public void changeCurrentProductSelected(int groupPosition,int childPosition) {

CartInfo.DataBean.ListBean listBean =sellerData.get(groupPosition).getList().get(childPosition);

listBean.setSelected(listBean.getSelected() ==0 ?1 :0);

}

public double calculateTotalPrice() {

double totalPrice =0;

for (int i =0; i

List list =sellerData.get(i).getList();

for (int j =0; j < list.size(); j++) {

//只有选中采取计算

                if (list.get(j).getSelected() ==1) {

double price = list.get(j).getPrice();

int num = list.get(j).getNum();

totalPrice += price * num;

}

}

}

return totalPrice;

}

public int calculateTotalNumber() {

int totalNumber =0;

for (int i =0; i

List list =sellerData.get(i).getList();

for (int j =0; j < list.size(); j++) {

//只有选中采取计算

                if (list.get(j).getSelected() ==1) {

int num = list.get(j).getNum();

totalNumber += num;

}

}

}

return totalNumber;

}

@Override

    public boolean isChildSelectable(int groupPosition,int childPosition) {

return false;

}

public boolean isAllProductsSelected() {

for (int i =0; i

List list =sellerData.get(i).getList();

for (int j =0; j < list.size(); j++) {

if (list.get(j).getSelected() ==0) {

return false;

}

}

}

return true;

}

public void changeAllProductsSelected(boolean b) {

for (int i =0; i

List list =sellerData.get(i).getList();

for (int j =0; j < list.size(); j++) {

list.get(j).setSelected(b ?1 :0);

}

}

}

public static class GroupViewHolder {

public CheckBoxcb_group_item;

public TextViewtv_title_group;

}

public static class ChildViewHolder {

public CheckBoxcb_child_item;

public ImageViewiv_icon_child;

public TextViewtv_title_child;

public TextViewtv_price_child;

public MyAddSubViewadd_sub_view_child;

}

OnCartListChangeListeneronCartListChangeListener;

public void setOnCartListChangeListener(OnCartListChangeListener onCartListChangeListener) {

this.onCartListChangeListener = onCartListChangeListener;

}

public interface OnCartListChangeListener {

void SellerSelectedChange(int groupPosition);

void changeCurrentProductSelected(int groupPosition,int childPosition);

void ProductNumberChange(int groupPosition,int childPosition,int number);

}

}

cartinfo是bean类 实现 接口

add_sub_view.xml布局

---

<?xml version="1.0" encoding="utf-8"?>

    android:layout_width="80dp"

    android:layout_height="30dp"

    android:layout_gravity="center_vertical"

    android:background="#000"

    android:orientation="horizontal"

    android:padding="2dp"

    >

        android:id="@+id/tv_sub_view"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1"

        android:background="#fff"

        android:gravity="center"

        android:text="-"

        android:textColor="#000"

        />

        android:id="@+id/tv_number_view"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_marginLeft="2dp"

        android:layout_marginRight="2dp"

        android:layout_weight="1"

        android:background="#fff"

        android:gravity="center"

        android:text="1"

        android:textColor="#000"

        />

        android:id="@+id/tv_add_view"

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_weight="1"

        android:background="#fff"

        android:gravity="center"

        android:text="+"

        android:textColor="#000"

        />

MyAddSubView自定义控件页面

package com.umeng.soexample.shopcat01;

import android.content.Context;

import android.support.annotation.Nullable;

import android.util.AttributeSet;

import android.view.View;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

/**

* Created by lenovo on 2018-11-20.

*/

public class MyAddSubViewextends LinearLayoutimplements View.OnClickListener{

TextViewtv_sub_view;

TextViewtv_number_view;

TextViewtv_add_view;

private int number =1;

public int getNumber() {

return number;

}

public void setNumber(int number) {

this.number = number;

tv_number_view.setText(number+"");

}

public MyAddSubView(Context context) {

super(context,null);

}

public MyAddSubView(Context context,@Nullable AttributeSet attrs) {

super(context, attrs);

View inflate = View.inflate(context, R.layout.add_sub_view,this);

tv_sub_view = inflate.findViewById(R.id.tv_sub_view);

tv_number_view = inflate.findViewById(R.id.tv_number_view);

tv_add_view = inflate.findViewById(R.id.tv_add_view);

tv_add_view.setOnClickListener(this);

tv_sub_view.setOnClickListener(this);

}

OnNumberChangeListeneronNumberChangeListener;

public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener) {

this.onNumberChangeListener = onNumberChangeListener;

}

@Override

    public void onClick(View v) {

switch (v.getId()){

case R.id.tv_sub_view:

if (number>1){

--number;

tv_number_view.setText(number+"");

if (onNumberChangeListener !=null){

onNumberChangeListener.OnNumberChange(number);

}

}else {

Toast.makeText(getContext(),"不能再少啦!", Toast.LENGTH_SHORT).show();

}

break;

case R.id.tv_add_view:

++number;

tv_number_view.setText(number+"");

if (onNumberChangeListener!=null){

onNumberChangeListener.OnNumberChange(number);

}

break;

}

}

public interface OnNumberChangeListener {

void OnNumberChange(int number);

}

}

ground_view_layout_shopcar.xml布局

---

<?xml version="1.0" encoding="utf-8"?>

    android:layout_width="match_parent"

    android:layout_height="60dp"

    android:gravity="center_vertical"

    android:orientation="horizontal"

    >

        android:id="@+id/cb_group_item"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

        android:id="@+id/tv_title_group"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="10dp"

        android:ellipsize="end"

        android:maxLines="2"

        android:text="标题"

        android:textColor="#000"

        android:textSize="20sp"

        />

child_view_layout_shopcar.xml

---

<?xml version="1.0" encoding="utf-8"?>

    android:layout_width="match_parent"

    android:layout_height="120dp"

    android:gravity="center_vertical"

    android:orientation="horizontal"

    >

        android:id="@+id/cb_child_item"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="10dp"

        />

        android:id="@+id/iv_icon_child"

        android:layout_width="80dp"

        android:layout_height="80dp"

        android:scaleType="centerCrop"

        android:src="@mipmap/ic_launcher"

        />

        android:layout_width="0dp"

        android:layout_height="match_parent"

        android:layout_marginLeft="10dp"

        android:layout_weight="1"

        android:gravity="center_vertical"

        android:orientation="vertical"

        >

            android:id="@+id/tv_title_child"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:ellipsize="end"

            android:maxLines="2"

            android:text="标题"

            android:textColor="#000"

            />

            android:id="@+id/tv_price_child"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="标题"

            android:textColor="@color/colorPrimary"

            android:textSize="20sp"

            />

    android:id="@+id/add_sub_view_child"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">