购物车二级列表
2017-10-24 18:24
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导入依赖：compile 'org.greenrobot:eventbus:3.0.0' compile 'com.zhy:okhttputils:2.0.0'
//适配器
package com.baway.week2exam;
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.baway.week2exam.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.g
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roupList = 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(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.cb.setChecked(groupBean.isChecked());
holder.tv.setText(groupBean.getGroupName());
//给group的checkbox设置点击事件
holder.cb.setOnClickListener(new GroupCbOnClickListener(groupPosition));
return view;
}
@Override
public View getChildView(final int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View view;
final 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);
holder.tvMoney = view.findViewById(R.id.tvPrice);
holder.adv = view.findViewById(R.id.adv);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}
//赋值
final ChildBean childBean = childList.get(groupPosition).get(childPosition);
holder.cb.setChecked(childBean.isChecked());
holder.tv.setText(childBean.getChildName());
holder.tvMoney.setText(childBean.getMoney() + "");
holder.adv.setCount(childBean.getCount() + "");
holder.cb.setOnClickListener(new ChildCbOnClickListener(groupPosition, childPosition));
holder.adv.setOnAddClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String countStr = holder.adv.getCount();
int count = Integer.parseInt(countStr);
holder.adv.setCount(++count + "");
childBean.setCount(count);
//发送数量和价钱
childBean.setChecked(true);
//判断该商家的所有商品的checkbox是否都选中
if (isChildChecked(childList.get(groupPosition))) {
groupList.get(groupPosition).setChecked(true);
MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
} else {
groupList.get(groupPosition).setChecked(false);
MessageEvent msg = new MessageEvent();
msg.setFlag(false);
EventBus.getDefault().post(msg);
notifyDataSetChanged();
notifyDataSetChanged();
}
//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());
msgCount.setMoney(totalMoney());
EventBus.getDefault().post(msgCount);
}
});
holder.adv.setOnDelClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String countStr = holder.adv.getCount();
int count = Integer.parseInt(countStr);
count = --count < 1 ? 1 : count;
holder.adv.setCount(count + "");
childBean.setCount(count);
if (count > 1) {
childBean.setChecked(true);
}
//判断该商家的所有商品的checkbox是否都选中
if (isChildChecked(childList.get(groupPosition))) {
groupList.get(groupPosition).setChecked(true);
MessageEvent msg = new MessageEvent();
msg.setFlag(isGroupChecked());
EventBus.getDefault().post(msg);
notifyDataSetChanged();
} else {
groupList.get(groupPosition).setChecked(false);
MessageEvent msg = new MessageEvent();
msg.setFlag(false);
EventBus.getDefault().post(msg);
notifyDataSetChanged();
notifyDataSetChanged();
}
//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());
msgCount.setMoney(totalMoney());
EventBus.getDefault().post(msgCount);
}
});
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
class GroupViewHolder {
CheckBox cb;
TextView tv;
}
class ChildViewHolder {
CheckBox cb;
TextView tv;
TextView tvMoney;
AddDelView adv;
}
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.setChecked(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());
msgCount.setMoney(totalMoney());
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).setChecked(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).setChecked(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.isChecked()) {
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).setChecked(cb.isChecked());
List<ChildBean> childBeenList = childList.get(groupPostion);
for (ChildBean childBean : childBeenList) {
childBean.setChecked(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());
msgCount.setMoney(totalMoney());
EventBus.getDefault().post(msgCount);
//判断其它的商家是否选中
// if (isGroupChecked()) {
// //发送消息去改变全选的状态,变成选中状态
// MessageEvent msg = new MessageEvent();
// msg.setFlag(true);
// EventBus.getDefault().post(msg);
// } 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(false);
// EventBus.getDefault().post(msg);
// }
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.isChecked()) {
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).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，并发送到主界面进行显示
MessageCounEvent msgCount = new MessageCounEvent();
msgCount.setCount(totalCount());
msgCount.setMoney(totalMoney());
EventBus.getDefault().post(msgCount);
notifyDataSetChanged();
}
private float totalMoney() {
float money = 0f;
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()) {
//遍历所有的商品，只要是选中状态的，就计算价格
int c = childList.get(i).get(j).getCount();
float m = childList.get(i).get(j).getMoney();
money += c * m;
}
}
}
return money;
}
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()) {
//遍历所有的商品，只要是选中状态的，就加1
count += childList.get(i).get(j).getCount();
}
}
}
return count;
}
}
//MainActivity
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());
}
aca6
});
}
@Override
protected void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}
@Subscribe
public void messageCountEvent(MessageCounEvent msg) {
mTvTotal.setText("总计：" + msg.getCount() + "个 "+msg.getMoney()+"元");
}
@Subscribe
public void messageEvent(MessageEvent msg) {
mCbAll.setChecked(msg.isFlag());
}
private void initData() {
for (int i = 0; i < 3; i++) {
GroupBean groupBean = new GroupBean("商家" + i, false);
groupList.add(groupBean);
List<ChildBean> list = new ArrayList<>();
for (int j = 0; j < 2; j++) {
ChildBean childBean = new ChildBean("商品" + i, false, 12.0f, 1);
list.add(childBean);
}
childList.add(list);
}
}
private void initView() {
mElv = (ExpandableListView) findViewById(R.id.elv);
mCbAll = (CheckBox) findViewById(R.id.cbAll);
mTvTotal = (TextView) findViewById(R.id.tvTotal);
}
}
//计数
public class MessageCounEvent {
private int count;
private float money;
public float getMoney() {
return money;
}
public void setMoney(float money) {
this.money = money;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
}
//MessageEvent
public class MessageEvent {
private boolean flag;
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
}
//MainActivity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=".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="match_parent"
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>
//child的布局
<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"
android:paddingLeft="20dp">
<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" />
<TextView
android:id="@+id/tvPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp" />
<com.baway.week2exam.AddDelView
android:id="@+id/adv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp" />
</LinearLayout>
//group的布局
<?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">
<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>
//ChildBean
public class ChildBean {
private String childName;
private boolean checked;
private float money;
private int count;
public ChildBean(String childName, boolean checked, float money, int count) {
this.childName = childName;
this.checked = checked;
this.money = money;
this.count = count;
}
public float getMoney() {
return money;
}
public void setMoney(float money) {
this.money = money;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public String getChildName() {
return childName;
}
public void setChildName(String childName) {
this.childName = childName;
}
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
}
//GroupBean
public class GroupBean {
private String groupName;
private boolean checked;
public GroupBean() {
}
public GroupBean(String groupName, boolean checked) {
this.groupName = groupName;
this.checked = checked;
}
public String getGroupName() {
return groupName;
}
public void setGroupName(String groupName) {
this.groupName = groupName;
}
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
}//drawable目录下
android:shape="oval"> <stroke android:width="1dp" android:color="#33000000"></stroke> <solid android:color="@android:color/transparent"></solid> </shape>
//adddel布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" android:orientation="horizontal"> <TextView android:id="@+id/del" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/circle_shape" android:gravity="center" android:paddingBottom="2dp" android:text="－" /> <TextView android:id="@+id/num" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="3dp" android:layout_marginRight="3dp" android:gravity="center" android:text="1" /> <TextView android:id="@+id/add" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/circle_shape" android:gravity="center" android:text="＋" /> </LinearLayout>
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