二级的购物车

运用网络请求，请求到数据

下面开始展示数据

activity—main的布局

[java]view plain copy
<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:id="@+id/activity_cart"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:paddingBottom="@dimen/activity_vertical_margin"  
    android:orientation="vertical"  
    android:paddingLeft="@dimen/activity_horizontal_margin"  
    android:paddingRight="@dimen/activity_horizontal_margin"  
    android:paddingTop="@dimen/activity_vertical_margin"  
    tools:context="bwie.com.xiangmoyisanzoumoli1118.View.CartActivity">  
<ExpandableListView  
     android:id="@+id/elv"  
    android:layout_weight="1"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content" />  
    <LinearLayout  
        android:layout_weight="9"  
        android:orientation="horizontal"  
        android:layout_width="match_parent"  
        android:layout_height="match_parent">  
        <CheckBox  
            android:id="@+id/quanxuan"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content" />  
        <TextView  
            android:text="全选"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content" />  
         <LinearLayout  
             android:layout_marginLeft="50dp"  
             android:orientation="vertical"  
             android:layout_width="wrap_content"  
             android:layout_height="wrap_content">  
             <TextView  
                 android:id="@+id/zongjia"  
                 android:layout_width="wrap_content"  
                 android:layout_height="wrap_content"  
                 android:text="总价：0.0"  
                 />  
             <TextView  
                 android:text="共0件商品"  
                 android:id="@+id/tv_count"  
                 android:layout_width="wrap_content"  
                 android:layout_height="wrap_content" />  
  
         </LinearLayout>  
           <TextView  
               android:text="去结算"  
               android:background="#FFD82020"  
                android:layout_marginLeft="100dp"  
               android:layout_width="wrap_content"  
               android:layout_height="wrap_content" />  
    </LinearLayout>  
</LinearLayout>  

MainActivity: 运用到EventBus

[java]view plain copy
package bwie.com.xiangmoyisanzoumoli1118.View;  
  
import android.os.Bundle;  
import android.support.v7.app.AppCompatActivity;  
import android.view.View;  
import android.widget.CheckBox;  
import android.widget.ExpandableListView;  
import android.widget.TextView;  
  
import org.greenrobot.eventbus.EventBus;  
import org.greenrobot.eventbus.Subscribe;  
  
import java.util.ArrayList;  
import java.util.List;  
  
import bwie.com.xiangmoyisanzoumoli1118.Adapter.MyExpandableAdapter;  
import bwie.com.xiangmoyisanzoumoli1118.R;  
import bwie.com.xiangmoyisanzoumoli1118.View.IActivity.IGoodsActivity;  
import bwie.com.xiangmoyisanzoumoli1118.bean.CountAndPrice;  
import bwie.com.xiangmoyisanzoumoli1118.bean.GoodsBean;  
import bwie.com.xiangmoyisanzoumoli1118.bean.MessgeEvent;  
import bwie.com.xiangmoyisanzoumoli1118.persenter.GoodsPersenter;  
  
public class CartActivity extends AppCompatActivity implements IGoodsActivity {  
  
    private ExpandableListView mElv;  
    private List<List<GoodsBean.DataBean.ListBean>> list = new ArrayList<>();  
    private CheckBox mQuanxuan;  
    /** 
     * 总价：0.0 
     */  
    private TextView mZongjia;  
    /** 
     * 共0件商品 
     */  
    private TextView mTvCount;  
     private int count=0;  
     private int price=0;  
    private MyExpandableAdapter myExpandableAdapter;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_cart);  
        EventBus.getDefault().register(this);  
        //调用GoodsPersenter中的方法  
        new GoodsPersenter(this).getGoods();  
        initView();  
        mQuanxuan.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                myExpandableAdapter.qx(mQuanxuan.isChecked());  
            }  
        });  
    }  
  
    @Override  
    public void chuanZhi(List<GoodsBean.DataBean> data) {  
        //遍历一级得到二级的集合  
        for (int i = 0; i < data.size(); i++) {  
            List<GoodsBean.DataBean.ListBean> list1 = data.get(i).getList();  
            list.add(list1);  
        }  
        myExpandableAdapter = new MyExpandableAdapter(data, this, list);  
        mElv.setAdapter(myExpandableAdapter);  
        //没有  
        mElv.setGroupIndicator(null);  
        //默认展开  
        for (int i = 0; i < data.size(); i++) {  
            mElv.expandGroup(i);  
        }  
  
  
    }  
  
    private void initView() {  
        mElv = (ExpandableListView) findViewById(R.id.elv);  
  
  
        mQuanxuan = (CheckBox) findViewById(R.id.quanxuan);  
        mZongjia = (TextView) findViewById(R.id.zongjia);  
        mTvCount = (TextView) findViewById(R.id.tv_count);  
    }  
    //接收传过来的值  
    @Subscribe  
    public void onPriceAndCount(CountAndPrice cp){  
  
  
        mZongjia.setText("共"+cp.getCount()+"件商品");  
        mTvCount.setText("总计："+cp.getPrice());  
  
    }  
    //接收传过来的值  
    @Subscribe  
    public void onPriceAndCount(MessgeEvent event){  
        //改变全选的状态  
        mQuanxuan.setChecked(event.isCheck());  
    }  
    @Override  
    protected void onDestroy() {  
        super.onDestroy();  
        EventBus.getDefault().unregister(this);  
    }  
}  

写二级列表的适配器

[java]view plain copy
package bwie.com.xiangmoyisanzoumoli1118.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.nostra13.universalimageloader.core.ImageLoader;  
  
import org.greenrobot.eventbus.EventBus;  
  
import java.util.List;  
  
import bwie.com.xiangmoyisanzoumoli1118.R;  
import bwie.com.xiangmoyisanzoumoli1118.bean.CountAndPrice;  
import bwie.com.xiangmoyisanzoumoli1118.bean.GoodsBean;  
import bwie.com.xiangmoyisanzoumoli1118.bean.MessgeEvent;  
  
  
  
public class MyExpandableAdapter extends BaseExpandableListAdapter {  
    private List<GoodsBean.DataBean> groupdata;  
    private Context context;  
    private List<List<GoodsBean.DataBean.ListBean>> childlist;  
  
    public MyExpandableAdapter(List<GoodsBean.DataBean> groupdata, Context context, List<List<GoodsBean.DataBean.ListBean>> childlist) {  
        this.groupdata = groupdata;  
        this.context = context;  
        this.childlist = childlist;  
    }  
  
    @Override  
    public int getGroupCount() {  
        return groupdata.size();  
    }  
  
    @Override  
    public int getChildrenCount(int groupPosition) {  
        return childlist.get(groupPosition).size();  
    }  
  
    @Override  
    public Object getGroup(int groupPosition) {  
        return groupdata.get(groupPosition);  
    }  
  
    @Override  
    public Object getChild(int groupPosition, int childPosition) {  
        return null;  
    }  
  
    @Override  
    public long getGroupId(int groupPosition) {  
        return groupPosition;  
    }  
  
    @Override  
    public long getChildId(int groupPosition, int childPosition) {  
        return childPosition;  
    }  
  
    @Override  
    public boolean hasStableIds() {  
        return false;  
    }  
  
    @Override  
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {  
        final GroupViewHolder holder;  
        if (convertView == null) {  
            convertView = View.inflate(context, R.layout.groupitem, null);  
            holder = new GroupViewHolder();  
            holder.tv_group = convertView.findViewById(R.id.tv_group);  
            holder.group_cb = convertView.findViewById(R.id.gx_group);  
  
            convertView.setTag(holder);  
        } else {  
            holder = (GroupViewHolder) convertView.getTag();  
        }  
        final GoodsBean.DataBean dataBean = groupdata.get(groupPosition);  
        String sellerName = dataBean.getSellerName();  
        holder.group_cb.setChecked(dataBean.isCheck());  
        holder.tv_group.setText(sellerName);  
        //点击一级checkbox的状态  
        holder.group_cb.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                dataBean.setCheck(holder.group_cb.isChecked());  
                //改变所有孩子的状态  
                  changeChildState(groupPosition,holder.group_cb.isChecked());  
                  EventBus.getDefault().post(jS());  
                //通过判断一级的checkbox判断全选的状态  
                   changeMianQXstatus(checkGroupAll());  
                notifyDataSetChanged();  
            }  
        });  
  
  
        return convertView;  
    }  
  
    @Override  
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {  
        final ChildViewHolder holder;  
        if (convertView == null) {  
            convertView = View.inflate(context, R.layout.childitem, null);  
            holder = new ChildViewHolder();  
  
               holder.tv_title=convertView.findViewById(R.id.title);  
               holder.price=convertView.findViewById(R.id.price);                //价格  
               holder.child_cb=convertView.findViewById(R.id.gouxuan_child);   //子勾选  
               holder.add=convertView.findViewById(R.id.jia);     //加加  
               holder.del=convertView.findViewById(R.id.del);      //删除  
              holder.jian=convertView.findViewById(R.id.jian);    //减  
              holder.title_img=convertView.findViewById(R.id.title_img);  
              holder.tv_num=convertView.findViewById(R.id.tv_num);  //数量  
              holder.yanse=convertView.findViewById(R.id.yanse);  
            convertView.setTag(holder);  
        } else {  
            holder = (ChildViewHolder) convertView.getTag();  
        }  
        final GoodsBean.DataBean.ListBean listBean = childlist.get(groupPosition).get(childPosition);  
        int price = (int) listBean.getPrice();  
             holder.child_cb.setChecked(listBean.isCheck());  
        holder.price.setText("¥："+price+"");  
        String title = listBean.getTitle();  
        holder.tv_title.setText(title);  
        String subhead = listBean.getSubhead();  
        String substring = subhead.substring(1, 10)+".....";  
        holder.yanse.setText(substring);  
        String images = listBean.getImages();  
        String[] split = images.split("\\|");  
        String s = split[1];  
        ImageLoader.getInstance().displayImage(s,holder.title_img);  
           listBean.setCou(1);  
        //给子条目的checkBox点击事件  
        holder.child_cb.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                listBean.setCheck(holder.child_cb.isChecked());  
  
                EventBus.getDefault().post(jS());  
                //如果二级的checkBox选中，就让一级的checkBox勾选  
                if(holder.child_cb.isChecked()) {  
  
                    if (ischeckAllchild(groupPosition)) {  
                        //改变一级checkBox的状态  
                        changeGroupstatus(groupPosition,true);  
                        //通过判断一级的CheckBox的状态来改变全选的状态  
                         changeMianQXstatus(checkGroupAll());  
  
                    }  
                }else{  
                    changeGroupstatus(groupPosition,false);  
                    changeMianQXstatus(checkGroupAll());  
                }  
                notifyDataSetChanged();  
            }  
  
        });  
  
        //点击加加的功能  
        holder.add.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                int cou = listBean.getCou();  
                holder.tv_num.setText(++cou+"");  
                listBean.setCou(cou);  
                if(holder.child_cb.isChecked()){  
                    EventBus.getDefault().post(jS());  
                }  
  
            }  
        });  
        //点击减减的功能  
        holder.jian.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                int cou = listBean.getCou();  
  
                if(cou==1) { return;}  
                holder.tv_num.setText(--cou+"");  
                listBean.setCou(cou);  
                if (holder.child_cb.isChecked()) {  
                        EventBus.getDefault().post(jS());  
  
                }  
            }  
        });  
      //点击删除  
        holder.del.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                List<GoodsBean.DataBean.ListBean> listBeen = childlist.get(groupPosition);  
                GoodsBean.DataBean.ListBean remove = listBeen.remove(childPosition);  
                if(listBeen.size()==0){  
                    childlist.remove(childPosition);  
                    groupdata.remove(groupPosition);  
                }  
               EventBus.getDefault().post(jS());  
                notifyDataSetChanged();  
  
            }  
        });  
  
        return convertView;  
    }  
  
    @Override  
    public boolean isChildSelectable(int groupPosition, int childPosition) {  
        return true;  
    }  
  
    class GroupViewHolder {  
        CheckBox group_cb;  
        TextView tv_group;  
    }  
  
    class ChildViewHolder {  
        CheckBox child_cb;  
        TextView tv_title,price,yanse,tv_num;  
        ImageView title_img,del,add,jian;  
  
  
    }  
    /** 
     * 判断全部的二级是CheckBox否选中 
     * 
     */  
    private boolean ischeckAllchild(int g){  
        List<GoodsBean.DataBean.ListBean> listBeen = childlist.get(g);  
        for (int i = 0; i <listBeen.size() ; i++) {  
            GoodsBean.DataBean.ListBean listBean = listBeen.get(i);  
            if(!listBean.isCheck()){  
                return false;  
            }  
        }  
        return true;  
    }  
  
    /** 
     * 计算数量和价格 
     * 通过遍历一级的得到二级的CheckBox，如果是选择的选中状态的话，就统计它们的总计的数量和价格 
     */  
    private CountAndPrice jS(){  
        int cou=0;  
        int jiage=0;  
        for (int i = 0; i <groupdata.size() ; i++) {  
            for (int j = 0; j <childlist.get(i).size() ; j++) {  
                GoodsBean.DataBean.ListBean listBean = childlist.get(i).get(j);  
                if(listBean.isCheck()){  
                    cou+=listBean.getCou();  
                    jiage+=(int)listBean.getPrice()*listBean.getCou();  
                }  
  
            }  
  
        }  
        CountAndPrice countAndPrice = new CountAndPrice();  
        countAndPrice.setCount(cou);  
        countAndPrice.setPrice(jiage);  
        return countAndPrice;  
    }  
    /** 
     * 改变一级列表的状态 
     */  
    private void changeGroupstatus(int groupPosition,boolean flag ){  
        GoodsBean.DataBean dataBean = groupdata.get(groupPosition);  
        dataBean.setCheck(flag);  
    }  
    /** 
     * 改变全选的状态 
     * 
     */  
    private void changeMianQXstatus(boolean flag){  
        MessgeEvent messgeEvent = new MessgeEvent();  
         messgeEvent.setCheck(flag);  
        EventBus.getDefault().post(messgeEvent);  
    }  
    /** 
     * 判断一级的是否全部选中 
     */  
    private boolean checkGroupAll(){  
        for (int i = 0; i < groupdata.size(); i++) {  
            if(!groupdata.get(i).isCheck()){  
                return false;  
            }  
        }  
        return true;  
    }  
    /** 
     * 改变所有孩子的状态 
     */  
    private void changeChildState(int grouPistion,boolean flag){  
        List<GoodsBean.DataBean.ListBean> listBeen = childlist.get(grouPistion);  
        for (int i = 0; i < listBeen.size(); i++) {  
            listBeen.get(i).setCheck(flag);  
        }  
    }  
    /** 
     * 改变全选的 
     */  
    public void qx(boolean flag){  
        for (int i = 0; i < groupdata.size(); i++) {  
           changeGroupstatus(i, flag);  
           changeChildState(i, flag);  
        }  
        EventBus.getDefault().post(jS());  
        notifyDataSetChanged();  
    }  
}  

一级列表的布局

[java]view plain copy
<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="horizontal" android:layout_width="match_parent"  
    android:layout_height="match_parent">  
   <CheckBox  
       android:id="@+id/gx_group"  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content" />  
    <TextView  
        android:id="@+id/tv_group"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content" />  
</LinearLayout>  

二级列表的布局

[java]view plain copy
<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical" android:layout_width="match_parent"  
    android:layout_height="match_parent">  
   <TextView  
       android:id="@+id/title"  
       android:layout_marginLeft="20dp"  
       android:layout_width="match_parent"  
       android:layout_height="wrap_content" />  
    <LinearLayout  
        android:orientation="horizontal"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content">  
        <CheckBox  
            android:layout_marginLeft="20dp"  
            android:gravity="center_vertical"  
            android:id="@+id/gouxuan_child"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content" />  
         <ImageView  
             android:gravity="center_vertical"  
             android:id="@+id/title_img"  
             android:layout_width="50dp"  
             android:layout_height="50dp" />  
          <LinearLayout  
              android:orientation="vertical"  
              android:layout_marginLeft="30dp"  
              android:layout_width="wrap_content"  
              android:layout_height="wrap_content">  
              <TextView  
                  android:id="@+id/price"  
                  android:layout_marginLeft="10dp"  
                  android:layout_width="wrap_content"  
                  android:layout_height="wrap_content" />  
              <TextView  
                  android:id="@+id/yanse"  
                  android:layout_marginLeft="10dp"  
                  android:layout_width="wrap_content"  
                  android:layout_height="wrap_content" />  
              <LinearLayout  
                  android:layout_marginLeft="100dp"  
                  android:orientation="horizontal"  
                  android:layout_width="wrap_content"  
                  android:layout_height="wrap_content">  
                  <ImageView  
                      android:id="@+id/jian"  
                      android:layout_width="20dp"  
                      android:layout_height="20dp"  
                      android:src="@drawable/shopcart_minus_grey" />  
  
                  <TextView  
                      android:id="@+id/tv_num"  
                      android:layout_width="wrap_content"  
                      android:layout_height="wrap_content"  
                      android:layout_marginLeft="5dp"  
                      android:background="@drawable/shopcart_add_btn"  
                      android:paddingBottom="2dp"  
                      android:paddingLeft="20dp"  
                      android:paddingRight="20dp"  
                      android:paddingTop="2dp"  
                      android:text="1" />  
  
                  <ImageView  
                      android:id="@+id/jia"  
                      android:layout_width="20dp"  
                      android:layout_height="20dp"  
                      android:layout_marginLeft="5dp"  
                      android:src="@drawable/shopcart_add_red" />  
              </LinearLayout>  
  
          </LinearLayout>  
               <ImageView  
                   android:id="@+id/del"  
                   android:layout_marginLeft="20dp"  
                   android:background="@drawable/a"  
                   android:layout_width="32dp"  
                   android:layout_height="29dp" />  
    </LinearLayout>  
</LinearLayout>  

画椭圆

[java]view plain copy
<?xml version="1.0" encoding="utf-8"?>  
<shape xmlns:android="http://schemas.android.com/apk/res/android">  
  
    <corners android:radius="200dp"></corners>  
    <stroke android:color="@color/colorPrimaryDark" android:width="1dp"></stroke>  
</shape>  

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