购物车二级列表

package test.baway.com.shoppingexam;


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 test.baway.com.shoppingexam.net.MessageCountEvent;
import test.baway.com.shoppingexam.net.MessageEvent;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    private ExpandableListView mElvMain;
    /**
     * 全选
     */
    private CheckBox mCbMainAll;
    /**
     * 合计：
     */
    private String[] group = {"射手", "刺客", "法师"};
    private String[] child = {"射手", "刺客", "法师"};
    private TextView mTvMainTotal;
    private List<GroupBean> grouplist = new ArrayList<>();
    private List<List<ChildBean>> childlist = new ArrayList<>();
    private MyExAdapter myExAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EventBus.getDefault().register(this);
        setContentView(R.layout.activity_main);
        initView();
        init();
        myExAdapter = new MyExAdapter(this, grouplist, childlist);
        mElvMain.setAdapter(myExAdapter);


    }


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


    @Subscribe
    public void MessageCountEvent(MessageCountEvent msgcount) {
        mTvMainTotal.setText("总计：" + msgcount.getCount() + "个");
    }


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


    private void init() {
        for (int i = 0; i < 3; i++) {
            GroupBean groupBean = new GroupBean(group[i], false);
            grouplist.add(groupBean);
            List<ChildBean> list = new ArrayList<>();
            for (int j = 0; j < 2; j++) {
                ChildBean childBean = new ChildBean(child[j], false);
                list.add(childBean);
            }
            childlist.add(list);
        }
    }


    private void initView() {
        mElvMain = (ExpandableListView) findViewById(R.id.elv_main);
        mCbMainAll = (CheckBox) findViewById(R.id.cb_main_All);
        mCbMainAll.setOnClickListener(this);
        mTvMainTotal = (TextView) findViewById(R.id.tv_main_Total);
    }


    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.cb_main_All:
                boolean checked = mCbMainAll.isChecked();
                myExAdapter.allchecked(checked);
                break;
        }
    }

}

package test.baway.com.shoppingexam;


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 test.baway.com.shoppingexam.net.MessageCountEvent;
import test.baway.com.shoppingexam.net.MessageEvent;


 


public class MyExAdapter extends BaseExpandableListAdapter {
    private Context context;
    private List<GroupBean> groupBeanList;
    private List<List<ChildBean>> childBeanList;
    private int count;


    public MyExAdapter(Context context, List<GroupBean> groupBeanList, List<List<ChildBean>> childBeanList) {
        this.context = context;
        this.groupBeanList = groupBeanList;
        this.childBeanList = childBeanList;
    }


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


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


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


    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return childBeanList.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(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        GroupViewHolder groupViewHolder = null;
        if (convertView == null) {
            groupViewHolder = new GroupViewHolder();
            convertView = View.inflate(context, R.layout.item, null);
            groupViewHolder.cb_item_checked = convertView.findViewById(R.id.cb_item_checked);
            groupViewHolder.tv_item_Name = convertView.findViewById(R.id.tv_item_Name);
            convertView.setTag(groupViewHolder);
        } else {
            groupViewHolder = (GroupViewHolder) convertView.getTag();
        }


        GroupBean groupBean = groupBeanList.get(groupPosition);
        groupViewHolder.cb_item_checked.setChecked(groupBean.isChecked());
        groupViewHolder.tv_item_Name.setText(groupBean.getGroupName());
        final GroupViewHolder finalGroupViewHolder = groupViewHolder;
        groupViewHolder.cb_item_checked.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean checked = finalGroupViewHolder.cb_item_checked.isChecked();
                groupBeanList.get(groupPosition).setChecked(checked);
                List<ChildBean> childBeen = childBeanList.get(groupPosition);
                for (ChildBean arr : childBeen) {
                    arr.setChecked(checked);
                }
                changecount();
                MessageEvent msg = new MessageEvent();
                msg.setFlag(isGroupChecked());
                EventBus.getDefault().post(msg);
                notifyDataSetChanged();


            }
        });
        return convertView;
    }


    @Override
    public View getChildView(final int groupPosition, int childPosition, final boolean isLastChild, View convertView, ViewGroup parent) {
        ChildViewHolder childViewHolder = null;
        if (convertView == null) {
            childViewHolder = new ChildViewHolder();
            convertView = View.inflate(context, R.layout.childitem, null);
            childViewHolder.cb_childitem = convertView.findViewById(R.id.cb_childitem);
            childViewHolder.tv_childitem_Name = convertView.findViewById(R.id.tv_childitem_Name);
            convertView.setTag(childViewHolder);
        } else {
            childViewHolder = (ChildViewHolder) convertView.getTag();
        }
        final ChildBean childBean = childBeanList.get(groupPosition).get(childPosition);
        childViewHolder.cb_childitem.setChecked(childBean.isChecked());
        childViewHolder.tv_childitem_Name.setText(childBean.getChildName());
        final ChildViewHolder finalChildViewHolder = childViewHolder;
        childViewHolder.cb_childitem.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean checked = finalChildViewHolder.cb_childitem.isChecked();
                childBean.setChecked(checked);
                if (checked) {
                    if (isChildChecked(childBeanList.get(groupPosition))) {
                        groupBeanList.get(groupPosition).setChecked(true);
                        MessageEvent msg = new MessageEvent();
                        msg.setFlag(isGroupChecked());
                        EventBus.getDefault().post(msg);
                    }
                } else {
                    groupBeanList.get(groupPosition).setChecked(false);
                    MessageEvent msg = new MessageEvent();
                    msg.setFlag(false);
                    EventBus.getDefault().post(msg);
                }
                changecount();
                notifyDataSetChanged();
            }
        });


        return convertView;
    }


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




    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;
    }


    public void allchecked(boolean result) {
        for (int i = 0; i < groupBeanList.size(); i++) {
            groupBeanList.get(i).setChecked(result);
            for (int j = 0; j < childBeanList.get(i).size(); j++) {
                childBeanList.get(i).get(j).setChecked(result);
            }
        }
        changecount();


        notifyDataSetChanged();
    }


    private void changecount() {
        //计算所有的总个数
        MessageCountEvent msgcount = new MessageCountEvent();
        msgcount.setCount(totalCount());
        EventBus.getDefault().post(msgcount);
    }


    private int totalCount() {
        count = 0;
        for (int i = 0; i < groupBeanList.size(); i++) {
            for (int j = 0; j < childBeanList.get(i).size(); j++) {
                if (childBeanList.get(i).get(j).isChecked()) {
                    //遍历所有的商品，只要是选中状态的，就加1
                    count++;
                }
            }
        }
        return count;
    }




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


    class GroupViewHolder {
        CheckBox cb_item_checked;
        TextView tv_item_Name;
    }


    class ChildViewHolder {
        CheckBox cb_childitem;
        TextView tv_childitem_Name;
    }


}

package test.baway.com.shoppingexam;


 
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;
    }
}

package test.baway.com.shoppingexam;


 
public class ChildBean {
    private String childName;
    private boolean checked;


    public ChildBean() {
    }


    public ChildBean(String childName, boolean checked) {
        this.childName = childName;
        this.checked = checked;
    }


    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;
    }
}

<?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="test.baway.com.shoppingexam.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_main"
        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/cb_main_All"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:text="全选" />


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


</LinearLayout>

<?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:descendantFocusability="blocksDescendants"
    android:gravity="center_vertical"
    android:orientation="horizontal">


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


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


</LinearLayout>

<?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"
    android:paddingLeft="20dp">


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


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


</LinearLayout>