二级列表和全选

compile 'org.greenrobot:eventbus:3.0.0'

package com.example.cll.erjigouwuche;

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 {

private ExpandableListView mElv;
/**
* 全选
*/
private CheckBox mCbAll;
/**
* 合计：
*/
private TextView mTvTotal;
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();
//给设置ExpandableListView设置数据
//模拟数据
initData();
adapter = new MyAdapter(this, groupList, childList);
mElv.setGroupIndicator(null);
mElv.setAdapter(adapter);
//全部展开
for (int i = 0; i < groupList.size(); i++) {
mElv.expandGroup(i);
}
//给全选设置点击事件
mCbAll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
adapter.allChecked(mCbAll.isChecked());
}
});
}

@Override
protected void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}

@Subscribe
public void messageCountEvent(MessageCounEvent msg) {
mTvTotal.setText("总计：" + msg.getCount() + "个");
}

@Subscribe
public void messageEvent(MessageEvent msg) {
mCbAll.setChecked(msg.isFlag());
}

private void initData() {
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(false,"商品" + j );
list.add(childBean);
}
childList.add(list);
}
}

private void initView() {
mElv = (ExpandableListView) findViewById(R.id.elv);
mCbAll = (CheckBox) findViewById(R.id.cbAll);
mTvTotal = (TextView) findViewB
4000
yId(R.id.tvTotal);
}

}
主布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.example.cll.erjigouwuche.MainActivity">

<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#ff3660"
android:gravity="center"
android:text="购物车"
android:textColor="#ffffff"
android:textSize="20sp" />

<ExpandableListView
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#33000000">

<CheckBox
android:id="@+id/cbAll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="全选" />

<TextView
android:id="@+id/tvTotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="合计：" />
</RelativeLayout>

</LinearLayout>
控制器

package com.example.cll.erjigouwuche;
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;

import static com.example.cll.erjigouwuche.R.id.cb;

/**
* Created by peng on 2017/10/24.
*/

public class MyAdapter extends BaseExpandableListAdapter {
private Context context;
private List<Groupbean> groupList;
private List<List<Childbean>> childList;
private int count;

public MyAdapter(Context context, List<Groupbean> groupList, List<List<Childbean>> childList) {
this.context = context;
this.groupList = groupList;
this.childList = childList;
}

@Override
public int getGroupCount() {
return groupList.size();
}

@Override
public int getChildrenCount(int groupPosition) {
return childList.get(groupPosition).size();
}

@Override
public Object getGroup(int groupPosition) {
return groupList.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
return childList.get(groupPosition).get(childPosition);
}

@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(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view;
GroupViewHolder holder;
if (convertView == null) {
holder = new GroupViewHolder();
view = View.inflate(context, R.layout.item, null);
holder.cb = view.findViewById(R.id.cb);
holder.tv = view.findViewById(R.id.tvname);
view.setTag(holder);
} else {
view = convertView;
holder = (GroupViewHolder) view.getTag();
}
//赋值
Groupbean groupBean = groupList.get(groupPosition);
holder.tv.setText(groupBean.getGroupname());
holder.cb.setChecked(groupBean.isChoked());

//给group的checkbox设置点击事件
holder.cb.setOnClickListener(new GroupCbOnClickListener(groupPosition));
return view;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View view;
ChildViewHolder holder;
if (convertView == null) {
holder = new ChildViewHolder();
view = View.inflate(context, R.layout.childitem, null);
holder.cb = view.findViewById(cb);
holder
16045
.tv = view.findViewById(R.id.tvName);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}
//赋值
Childbean childBean = childList.get(groupPosition).get(childPosition);
holder.cb.setChecked(childBean.isChoked());
holder.tv.setText(childBean.getChildname());

holder.cb.setOnClickListener(new ChildCbOnClickListener(groupPosition, childPosition));
return view;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}

class GroupViewHolder {
CheckBox cb;
TextView tv;
}

class ChildViewHolder {
CheckBox cb;
TextView tv;
}

class ChildCbOnClickListener implements View.OnClickListener {
private int groupPosition;
private int childPosition;

public ChildCbOnClickListener(int groupPosition, int childPosition) {
this.groupPosition = groupPosition;
this.childPosition = childPosition;
}

@Override
public void onClick(View v) {
if (v instanceof CheckBox) {

CheckBox cb = (CheckBox) v;
List<Childbean> childBeen = childList.get(groupPosition);
Childbean childBean = childBeen.get(childPosition);
childBean.setChoked(cb.isChecked());
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);
//判断该商家的所有商品的checkbox是否都选中
if (isChildChecked(childBeen)) {
groupList.get(groupPosition).setChoked(true);
//                    //如果商品全部选中的话，则去判断所有商家是否都选中
//                    if (isGroupChecked()) {
//                        //发送消息去改变全选的状态,变成选中状态
//                    } else {
//                        //发送消息去改变全选的状态，变成未选中状态
//                    }
MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
} else {
groupList.get(groupPosition).setChoked(false);
MessageEvent msg = new MessageEvent();
msg.setFlag(false);
EventBus.getDefault().post(msg);
notifyDataSetChanged();
notifyDataSetChanged();
}
}

}
}

/**
* 判断该商家的所有商品的checkbox是否都选中
*
* @return
*/
private boolean isChildChecked(List<Childbean> childBeen) {
for (int i = 0; i < childBeen.size(); i++) {
Childbean childBean = childBeen.get(i);
if (!childBean.isChoked()) {
return false;
}
}
return true;
}

class GroupCbOnClickListener implements View.OnClickListener {
private int groupPostion;

public GroupCbOnClickListener(int groupPostion) {
this.groupPostion = groupPostion;
}

@Override
public void onClick(View v) {
if (v instanceof CheckBox) {

//多态，因为我是给checkbox设置的点击事件，所以可以强转成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(groupPostion).setChoked(cb.isChecked());
List<Childbean> childBeenList = childList.get(groupPostion);
for (Childbean childBean : childBeenList) {
childBean.setChoked(cb.isChecked());
}
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);

MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
}
}
}

/**
* 判断其它的商家是否选中
*
* @return
*/
private boolean isGroupChecked() {
for (Groupbean groupBean : groupList) {
if (!groupBean.isChoked()) {
return false;
}
}
return true;
}

/**
* 主界面全选按钮的操作
*
* @param bool
*/
public void allChecked(boolean bool) {
for (int i = 0; i < groupList.size(); i++) {
groupList.get(i).setChoked(bool);
for (int j = 0; j < childList.get(i).size(); j++) {
childList.get(i).get(j).setChoked(bool);
}
}
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);
notifyDataSetChanged();

}

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).isChoked()) {
//遍历所有的商品，只要是选中状态的，就加1
count++;
}
}
}
return count;
}
}
子bean

package com.example.cll.erjigouwuche;
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;

import static com.example.cll.erjigouwuche.R.id.cb;

/**
* Created by peng on 2017/10/24.
*/

public class MyAdapter extends BaseExpandableListAdapter {
private Context context;
private List<Groupbean> groupList;
private List<List<Childbean>> childList;
private int count;

public MyAdapter(Context context, List<Groupbean> groupList, List<List<Childbean>> childList) {
this.context = context;
this.groupList = groupList;
this.childList = childList;
}

@Override
public int getGroupCount() {
return groupList.size();
}

@Override
public int getChildrenCount(int groupPosition) {
return childList.get(groupPosition).size();
}

@Override
public Object getGroup(int groupPosition) {
return groupList.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
return childList.get(groupPosition).get(childPosition);
}

@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(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view;
GroupViewHolder holder;
if (convertView == null) {
holder = new GroupViewHolder();
view = View.inflate(context, R.layout.item, null);
holder.cb = view.findViewById(R.id.cb);
holder.tv = view.findViewById(R.id.tvname);
view.setTag(holder);
} else {
view = convertView;
holder = (GroupViewHolder) view.getTag();
}
//赋值
Groupbean groupBean = groupList.get(groupPosition);
holder.tv.setText(groupBean.getGroupname());
holder.cb.setChecked(groupBean.isChoked());

//给group的checkbox设置点击事件
holder.cb.setOnClickListener(new GroupCbOnClickListener(groupPosition));
return view;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View view;
ChildViewHolder holder;
if (convertView == null) {
holder = new ChildViewHolder();
view = View.inflate(context, R.layout.childitem, null);
holder.cb = view.findViewById(cb);
holder.tv = view.findViewById(R.id.tvName);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}
//赋值
Childbean childBean = childList.get(groupPosition).get(childPosition);
holder.cb.setChecked(childBean.isChoked());
holder.tv.setText(childBean.getChildname());

holder.cb.setOnClickListener(new ChildCbOnClickListener(groupPosition, childPosition));
return view;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}

class GroupViewHolder {
CheckBox cb;
TextView tv;
}

class ChildViewHolder {
CheckBox cb;
TextView tv;
}

class ChildCbOnClickListener implements View.OnClickListener {
private int groupPosition;
private int childPosition;

public ChildCbOnClickListener(int groupPosition, int childPosition) {
this.groupPosition = groupPosition;
this.childPosition = childPosition;
}

@Override
public void onClick(View v) {
if (v instanceof CheckBox) {

CheckBox cb = (CheckBox) v;
List<Childbean> childBeen = childList.get(groupPosition);
Childbean childBean = childBeen.get(childPosition);
childBean.setChoked(cb.isChecked());
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);
//判断该商家的所有商品的checkbox是否都选中
if (isChildChecked(childBeen)) {
groupList.get(groupPosition).setChoked(true);
//                    //如果商品全部选中的话，则去判断所有商家是否都选中
//                    if (isGroupChecked()) {
//                        //发送消息去改变全选的状态,变成选中状态
//                    } else {
//                        //发送消息去改变全选的状态，变成未选中状态
//                    }
MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
} else {
groupList.get(groupPosition).setChoked(false);
MessageEvent msg = new MessageEvent();
msg.setFlag(false);
EventBus.getDefault().post(msg);
notifyDataSetChanged();
notifyDataSetChanged();
}
}

}
}

/**
* 判断该商家的所有商品的checkbox是否都选中
*
* @return
*/
private boolean isChildChecked(List<Childbean> childBeen) {
for (int i = 0; i < childBeen.size(); i++) {
Childbean childBean = childBeen.get(i);
if (!childBean.isChoked()) {
return false;
}
}
return true;
}

class GroupCbOnClickListener implements View.OnClickListener {
private int groupPostion;

public GroupCbOnClickListener(int groupPostion) {
this.groupPostion = groupPostion;
}

@Override
public void onClick(View v) {
if (v instanceof CheckBox) {

//多态，因为我是给checkbox设置的点击事件，所以可以强转成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(groupPostion).setChoked(cb.isChecked());
List<Childbean> childBeenList = childList.get(groupPostion);
for (Childbean childBean : childBeenList) {
childBean.setChoked(cb.isChecked());
}
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);

MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
}
}
}

/**
* 判断其它的商家是否选中
*
* @return
*/
private boolean isGroupChecked() {
for (Groupbean groupBean : groupList) {
if (!groupBean.isChoked()) {
return false;
}
}
return true;
}

/**
* 主界面全选按钮的操作
*
* @param bool
*/
public void allChecked(boolean bool) {
for (int i = 0; i < groupList.size(); i++) {
groupList.get(i).setChoked(bool);
for (int j = 0; j < childList.get(i).size(); j++) {
childList.get(i).get(j).setChoked(bool);
}
}
//计算选中的商品数，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
EventBus.getDefault().post(msgCount);
notifyDataSetChanged();

}

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).isChoked()) {
//遍历所有的商品，只要是选中状态的，就加1
count++;
}
}
}
return count;
}
}
子布局
 

<?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:paddingLeft="20dp"
android:gravity="center_vertical"
android:orientation="horizontal">

<CheckBox
android:id="@+id/cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp" />

</LinearLayout>

package com.example.cll.erjigouwuche;

/**
* Created by cll on 2017/10/24.
*/

public class Groupbean {
private boolean choked;
private String groupname;

public Groupbean(boolean choked, String groupname) {
this.choked = choked;
this.groupname = groupname;
}

public boolean isChoked() {
return choked;
}

public void setChoked(boolean choked) {
this.choked = choked;
}

public String getGroupname() {
return groupname;
}

public void setGroupname(String groupname) {
this.groupname = groupname;
}
}

<?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">

<CheckBox
android:id="@+id/cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp" />

</LinearLayout>

package com.example.cll.erjigouwuche;

/**
* Created by peng on 2017/10/24.
*/

public class MessageCounEvent {
private int count;

public int getCount() {
return count;
}

public void setCount(int count) {
this.count = count;
}
}

package com.example.cll.erjigouwuche;

/**
* Created by peng on 2017/10/24.
*/

public class MessageEvent {
private boolean flag;

public boolean isFlag() {
return flag;
}

public void setFlag(boolean flag) {
this.flag = flag;
}
}