二级列表购物车

----MainActivity------------

package com.baway.twoshopcar;

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;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

/**
* 全选
*/
private CheckBox mCbAll;
/**
* 22
*/
private TextView mTotalPrice;
/**
* 22
*/
private TextView mTotalNum;
private ExpandableListView mElv;

private List<GroupBean> groupList = new ArrayList<>();
private List<List<ChildBean>> childList = new ArrayList<>();
private MyAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EventBus.getDefault().register(this);
initView();
initDate();
mElv.setGroupIndicator(null);
adapter = new MyAdapter(this, groupList, childList);
mElv.setAdapter(adapter);
for (int i = 0; i <groupList.size() ; i++) {
mElv.expandGroup(i);
}

}

@Subscribe
public void moneyCount(MCEvent mcEvent){
int money = mcEvent.getMoney();
int count = mcEvent.getCount();
mTotalNum.setText(count+"");
mTotalPrice.setText(money+"");
}
@Subscribe
public void messageEvent(MsgEvent msg) {
mCbAll.setChecked(msg.isFlag());
}
@Override
protected void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}

private void initDate() {
for (int i = 0; i < 3; i++) {
GroupBean groupBean = new GroupBean(false, "商家" + i);
groupList.add(groupBean);
List<ChildBean> list = new ArrayList<>();
for (int j = 0; j < 2; j++) {
ChildBean childBean = new ChildBean("商品" + i, 1 + i, false);
list.add(childBean);
}
childList.add(list);
}
}

private void initView() {
mCbAll = (CheckBox) findViewById(R.id.cb_all);
mCbAll.setOnClickListener(this);
mTotalPrice = (TextView) findViewById(R.id.totalPrice);
mTotalNum = (TextView) findViewById(R.id.totalNum);
mElv = (ExpandableListView) findViewById(R.id.elv);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.cb_all:
adapter.allChecked(mCbAll.isChecked());
break;
}
}
}

-----------MyAdapter适配器------------------

package com.baway.twoshopcar;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.CheckBox;import android.widget.TextView;import org.greenrobot.eventbus.EventBus;import java.util.List;/*** Created by 郑文杰 on 2017/10/24.*/public class MyAdapter extends BaseExpandableListAdapter {private Context context;private List<GroupBean> groupList;private List<List<ChildBean>> childList;private int count;private int sumMoney;public MyAdapter(Context context, List<GroupBean> groupList, List<List<ChildBean>> childList) {this.context = context;this.groupList = groupList;this.childList = childList;}@Overridepublic int getGroupCount() {return groupList.size();}@Overridepublic int getChildrenCount(int groupPosition) {return childList.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {return groupList.get(groupPosition);}@Overridepublic Object getChild(int groupPosition, int childPosition) {return childList.get(groupPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic boolean hasStableIds() {return false;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {GroupViewHolder holder;if (convertView == null) {holder = new GroupViewHolder();convertView = View.inflate(context, R.layout.groupitem, null);holder.cb = convertView.findViewById(R.id.cb);holder.tvName = convertView.findViewById(R.id.tvName);convertView.setTag(holder);} else {holder = (GroupViewHolder) convertView.getTag();}//赋值GroupBean groupBean = groupList.get(groupPosition);holder.cb.setChecked(groupBean.isChecked());holder.tvName.setText(groupBean.getGroupName());//给group设置点击事件holder.cb.setOnClickListener(new GroupCbOnClickListener(groupPosition));return convertView;}@Overridepublic View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {ChildViewHolder holder;if (convertView == null) {holder = new ChildViewHolder();convertView = View.inflate(context, R.layout.childitem, null);holder.cb = convertView.findViewById(R.id.cb);holder.tvName = convertView.findViewById(R.id.tvName);holder.tvPrice = convertView.findViewById(R.id.tvPrice);convertView.setTag(holder);} else {holder = (ChildViewHolder) convertView.getTag();}//赋值ChildBean childBean = childList.get(groupPosition).get(childPosition);holder.cb.setChecked(childBean.isChecked());holder.tvName.setText(childBean.getChildName());holder.tvPrice.setText(childBean.getPrice() + "");//设置点击事件Childholder.cb.setOnClickListener(new ChildCbOnClickListener(groupPosition,childPosition));return convertView;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return true;}class GroupViewHolder {CheckBox cb;TextView tvName;}class ChildViewHolder {CheckBox cb;TextView tvName;TextView tvPrice;}class ChildCbOnClickListener implements View.OnClickListener {private int groupPosition;private int childPosition;public ChildCbOnClickListener(int groupPosition, int childPosition) {this.groupPosition = groupPosition;this.childPosition = childPosition;}@Overridepublic void onClick(View v) {if (v instanceof CheckBox) {CheckBox cb = (CheckBox) v;List<ChildBean> childBeen = childList.get(groupPosition);ChildBean childBean = childBeen.get(childPosition);childBean.setChecked(cb.isChecked());//计算选中的商品数，并发送到主界面进行显示MCEvent mcEvent = new MCEvent();mcEvent.setCount(totalCount());mcEvent.setMoney(totalPrice());EventBus.getDefault().post(mcEvent);//判断商家所有的商品的checkbox是否选中if (isChildChecked(childBeen)) {groupList.get(groupPosition).setChecked(true);MsgEvent msgEvent = new MsgEvent();msgEvent.setFlag(isGroupChecked());EventBus.getDefault().post(msgEvent);notifyDataSetChanged();} else {groupList.get(groupPosition).setChecked(false);MsgEvent msgEvent = new MsgEvent();msgEvent.setFlag(false);msgEvent.setFlag(isGroupChecked());EventBus.getDefault().post(msgEvent);notifyDataSetChanged();}}}}/*** 判断所有商家的所有商品的checkbox是否都选中** @param childBean* @return*/private boolean isChildChecked(List<ChildBean> childBean) {for (int i = 0; i < childBean.size(); i++) {ChildBean childBean1 = childBean.get(i);if (!childBean1.isChecked()) {return false;}}return true;}class GroupCbOnClickListener implements View.OnClickListener {private int groupPosition;public GroupCbOnClickListener(int groupPosition) {this.groupPosition = groupPosition;}@Overridepublic void onClick(View v) {if (v instanceof CheckBox){CheckBox cb= (CheckBox) v;//根据cb.isChecked()是否选中，给一级列的checkbox改变状态groupList.get(groupPosition).setChecked(cb.isChecked());List<ChildBean> childBeenList = childList.get(groupPosition);for (ChildBean childBean : childBeenList){childBean.setChecked(cb.isChecked());}//计算选中的商品数和金额，并发送到主界面进行显示MCEvent mcEvent = new MCEvent();mcEvent.setCount(totalCount());mcEvent.setMoney(totalPrice());EventBus.getDefault().post(mcEvent);MsgEvent msgEvent = new MsgEvent();msgEvent.setFlag(isGroupChecked());EventBus.getDefault().post(msgEvent);notifyDataSetChanged();}}}/*** 判断其他商家是否选中* @return*/private boolean isGroupChecked() {for (GroupBean groupBean : groupList) {if (!groupBean.isChecked()){return false;}}return true;}//主界面全选框选中状态public void allChecked(boolean bool) {for (int i = 0; i < groupList.size(); i++) {groupList.get(i).setChecked(bool);for (int j = 0; j < childList.get(i).size(); j++) {childList.get(i).get(j).setChecked(bool);}}//计算选中的商品数，发送到主界面进行显示MCEvent mcEvent = new MCEvent();mcEvent.setCount(totalCount());mcEvent.setMoney(totalPrice());EventBus.getDefault().post(mcEvent);notifyDataSetChanged();}/*** 计算商品总价格** @return*/private int totalPrice() {sumMoney = 0;for (int i = 0; i < groupList.size(); i++) {for (int j = 0; j < childList.get(i).size(); j++) {if (childList.get(i).get(j).isChecked()) {int price = childList.get(i).get(j).getPrice();sumMoney += price;}}}return sumMoney;}/*** 计算商品的总数量** @return*/private int totalCount() {count = 0;for (int i = 0; i < groupList.size(); i++) {for (int j = 0; j < childList.get(i).size(); j++) {if (childList.get(i).get(j).isChecked()) {//遍历所有商品，只要是选中状态的，就加1count++;}}}return count;}}

-----------childBean--------------

package com.baway.twoshopcar;/*** Created by hhh on 2017/10/24.*/public class ChildBean {private String childName;private int price;private boolean checked;public ChildBean(String childName, int price, boolean checked) {this.childName = childName;this.price = price;this.checked = checked;}public String getChildName() {return childName;}public void setChildName(String childName) {this.childName = childName;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public boolean isChecked() {return checked;}public void setChecked(boolean checked) {this.checked = checked;}}

----------groupBean-------------

package com.baway.twoshopcar;/*** Created by hhh on 2017/10/24.*/public class GroupBean {private boolean checked;private String groupName;public GroupBean(boolean checked, String groupName) {this.checked = checked;this.groupName = groupName;}public boolean isChecked() {return checked;}public void setChecked(boolean checked) {this.checked = checked;}public String getGroupName() {return groupName;}public void setGroupName(String groupName) {this.groupName = groupName;}}

-------------MCEVENT------------------

package com.baway.twoshopcar;/*** Created by hhhh on 2017/10/24.*/public class MCEvent {private int money;private int count;public int getMoney() {return money;}public void setMoney(int money) {this.money = money;}public int getCount() {return count;}public void setCount(int count) {this.count = count;}}

---------msgEvent--------

package com.baway.twoshopcar;/*** Created by hhh on 2017/10/24.*/public class MsgEvent {private boolean flag;public boolean isFlag() {return flag;}public void setFlag(boolean flag) {this.flag = flag;}}

------------MainActivity布局文件-------------------

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"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"tools:context="com.baway.twoshopcar.MainActivity"><LinearLayoutandroid:id="@+id/ll"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:orientation="horizontal"><CheckBoxandroid:id="@+id/cb_all"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:text="全选" /><TextViewandroid:layout_width="wrap_content"android:layout_height="match_parent"android:layout_marginLeft="20dp"android:gravity="center_vertical"android:text="合计:" /><TextViewandroid:id="@+id/totalPrice"android:layout_width="wrap_content"android:layout_height="match_parent"android:layout_marginLeft="10dp"android:gravity="center_vertical"android:text="22" /><TextViewandroid:layout_width="wrap_content"android:layout_height="match_parent"android:layout_marginLeft="30dp"android:gravity="center_vertical"android:text="数量" /><TextViewandroid:id="@+id/totalNum"android:layout_width="wrap_content"android:layout_height="match_parent"android:layout_marginLeft="10dp"android:gravity="center_vertical"android:text="22" /></LinearLayout><ExpandableListViewandroid:id="@+id/elv"android:layout_above="@id/ll"android:layout_width="match_parent"android:layout_height="match_parent"></ExpandableListView></RelativeLayout>

----------------childitem布局文件---------------

<?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="40dp"android:background="#330000ff"android:paddingLeft="20dp"android:gravity="center_vertical"android:orientation="horizontal"><CheckBoxandroid:id="@+id/cb"android:layout_width="wrap_content"android:layout_height="wrap_content" /><TextViewandroid:id="@+id/tvName"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="5dp" /><TextViewandroid:id="@+id/tvPrice"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="60dp" /></LinearLayout>

-------------groupitem布局----------------------

<?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="40dp"android:background="#330000ff"android:gravity="center_vertical"android:orientation="horizontal"><CheckBoxandroid:id="@+id/cb"android:layout_width="wrap_content"android:layout_height="wrap_content" /><TextViewandroid:id="@+id/tvName"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="5dp" /></LinearLayout>