Android 实现自己定义多级树控件和全选与反选的效果

博文開始之前，首先要感谢大牛：(lmj623565791),本博文是在其博文http://blog.csdn.net/lmj623565791/article/details/40212367基础上进一步的改动而来。

本博文主要是利用ListView实现多级树控件，并通过CheckBox来对各节点的全选与反选的功能,首先来看一下效果：

对于多级树的显示事实上就是通过数据中各个节点的关系，通过不同的缩进来达到树的效果。而数据中主要要把握id，父节点pId。name的关系，来显示其效果。

代码实现例如以下：

一. 布局xml文件

1.主界面activity_main.xml,简单的ListView和一个控制CheckBox切换的Button

<span style="font-family:KaiTi_GB2312;font-size:18px;"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
	android:orientation="vertical"
	>
	<Button
	    android:layout_width="match_parent"
	    android:layout_height="wrap_content"
	    android:id="@+id/check_switch_btn"
	    android:text="CheckBox切换"
	    android:gravity="center"
	    android:layout_marginBottom="10dp"
	    />
	<ListView
	    android:layout_width="match_parent"
	    android:layout_height="match_parent"
	    android:id="@+id/tree_lv"
	    />
</LinearLayout>
</span>

2.树节点布局list_view.xml. 树节点关闭和打开的Image,旋转框CheckBox,内容TextView

<span style="font-family:KaiTi_GB2312;font-size:18px;"><?xml version="1.0" encoding="utf-8"?

>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:minHeight="40dip" >

    <ImageView
        android:id="@+id/id_treenode_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:src="@drawable/tree_econpand" />

    <CheckBox
        android:id="@+id/id_treeNode_check"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/id_treenode_icon"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:background="@drawable/check_box_bg"
        android:button="@null"
        android:focusable="false"
        />

    <TextView
        android:id="@+id/id_treenode_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/id_treeNode_check"
        android:text="@string/app_name"
        android:textSize="18sp" />

</RelativeLayout></span>

二.java代码实现

1.实体类MyNodeBean，内容能够依据详细情况增加

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo.bean;

public class MyNodeBean {
	/**
	 * 节点Id
	 */
	private int id;
	/**
	 * 节点父id
	 */
	private int pId;
	/**
	 * 节点name
	 */
	private String name;
	/**
	 *
	 */
	private String desc;
	/**
	 * 节点名字长度
	 */
	private long length;

	public MyNodeBean(int id, int pId, String name) {
		super();
		this.id = id;
		this.pId = pId;
		this.name = name;
	}

	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public int getPid() {
		return pId;
	}
	public void setPid(int pId) {
		this.pId = pId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getDesc() {
		return desc;
	}
	public void setDesc(String desc) {
		this.desc = desc;
	}
	public long getLength() {
		return length;
	}
	public void setLength(long length) {
		this.length = length;
	}

}
</span>

2.主函数MainActivity.java

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import com.example.customtreeviewdemo.bean.MyNodeBean;
import com.example.customtreeviewdemo.tree.Node;
import com.example.customtreeviewdemo.tree.TreeListViewAdapter.OnTreeNodeClickListener;

public class MainActivity extends Activity {

	private ListView treeLv;
	private Button checkSwitchBtn;
	private MyTreeListViewAdapter<MyNodeBean> adapter;
	private List<MyNodeBean> mDatas = new ArrayList<MyNodeBean>();
	//标记是显示Checkbox还是隐藏
	private boolean isHide = true;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initDatas();
		treeLv = (ListView) this.findViewById(R.id.tree_lv);
		checkSwitchBtn = (Button)this.findViewById(R.id.check_switch_btn);

		checkSwitchBtn.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				if(isHide){
					isHide = false;
				}else{
					isHide = true;
				}
				//切换checkbox
				adapter.updateView(isHide);
			}

		});
		try {
			adapter = new MyTreeListViewAdapter<MyNodeBean>(treeLv, this,
					mDatas, 10, isHide);

			adapter.setOnTreeNodeClickListener(new OnTreeNodeClickListener() {
				@Override
				public void onClick(Node node, int position) {
					if (node.isLeaf()) {
						Toast.makeText(getApplicationContext(), node.getName(),
								Toast.LENGTH_SHORT).show();
					}
				}

				@Override
				public void onCheckChange(Node node, int position,
						List<Node> checkedNodes) {
					// TODO Auto-generated method stub

					StringBuffer sb = new StringBuffer();
					for (Node n : checkedNodes) {
						int pos = n.getId() - 1;
						sb.append(mDatas.get(pos).getName()).append("---")
								.append(pos + 1).append(";");

					}

					Toast.makeText(getApplicationContext(), sb.toString(),
							Toast.LENGTH_SHORT).show();
				}

			});
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		treeLv.setAdapter(adapter);

	}

	private void initDatas() {
		mDatas.add(new MyNodeBean(1, 0, "中国古代"));
		mDatas.add(new MyNodeBean(2, 1, "唐朝"));
		mDatas.add(new MyNodeBean(3, 1, "宋朝"));
		mDatas.add(new MyNodeBean(4, 1, "明朝"));
		mDatas.add(new MyNodeBean(5, 2, "李世民"));
		mDatas.add(new MyNodeBean(6, 2, "李白"));

		mDatas.add(new MyNodeBean(7, 3, "赵匡胤"));
		mDatas.add(new MyNodeBean(8, 3, "苏轼"));

		mDatas.add(new MyNodeBean(9, 4, "朱元璋"));
		mDatas.add(new MyNodeBean(10, 4, "唐伯虎"));
		mDatas.add(new MyNodeBean(11, 4, "文征明"));
		mDatas.add(new MyNodeBean(12, 7, "赵建立"));
		mDatas.add(new MyNodeBean(13, 8, "苏东东"));
		mDatas.add(new MyNodeBean(14, 10, "秋香"));
	}
}
</span>

3.ListView实现适配器MyTreeListViewAdapter.java

该适配器继承TreeListViewAdapter<T>,在该适配器中仅仅实现方法

<span style="font-family:KaiTi_GB2312;font-size:18px;">getConvertView(Node node, int position, View convertView,
			ViewGroup parent)</span>

其它。父类中载入

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo;

import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.example.customtreeviewdemo.tree.Node;
import com.example.customtreeviewdemo.tree.TreeListViewAdapter;

public class MyTreeListViewAdapter<T> extends TreeListViewAdapter<T> {

	public MyTreeListViewAdapter(ListView mTree, Context context,
			List<T> datas, int defaultExpandLevel,boolean isHide)
			throws IllegalArgumentException, IllegalAccessException {
		super(mTree, context, datas, defaultExpandLevel,isHide);
	}

	@SuppressWarnings("unchecked")
	@Override
	public View getConvertView(Node node, int position, View convertView,
			ViewGroup parent) {
		ViewHolder viewHolder = null;
		if (convertView == null)
		{
			convertView = mInflater.inflate(R.layout.list_item, parent, false);
			viewHolder = new ViewHolder();
			viewHolder.icon = (ImageView) convertView
					.findViewById(R.id.id_treenode_icon);
			viewHolder.label = (TextView) convertView
					.findViewById(R.id.id_treenode_name);
			viewHolder.checkBox = (CheckBox)convertView.findViewById(R.id.id_treeNode_check);

			convertView.setTag(viewHolder);

		} else
		{
			viewHolder = (ViewHolder) convertView.getTag();
		}

		if (node.getIcon() == -1)
		{
			viewHolder.icon.setVisibility(View.INVISIBLE);
		} else
		{
			viewHolder.icon.setVisibility(View.VISIBLE);
			viewHolder.icon.setImageResource(node.getIcon());
		}

		if(node.isHideChecked()){
			viewHolder.checkBox.setVisibility(View.GONE);
		}else{
			viewHolder.checkBox.setVisibility(View.VISIBLE);
			setCheckBoxBg(viewHolder.checkBox,node.isChecked());
		}
		viewHolder.label.setText(node.getName());

		return convertView;
	}
	private final class ViewHolder
	{
		ImageView icon;
		TextView label;
		CheckBox checkBox;
	}

	/**
	 * checkbox是否显示
	 * @param cb
	 * @param isChecked
	 */
	private void setCheckBoxBg(CheckBox cb,boolean isChecked){
		if(isChecked){
			cb.setBackgroundResource(R.drawable.check_box_bg_check);
		}else{
			cb.setBackgroundResource(R.drawable.check_box_bg);
		}
	}
}
</span>

三、树节点实现的方法

1.树节点实体类Node.java

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo.tree;

import java.util.ArrayList;
import java.util.List;

public class Node {
	/**
	 * 节点id
	 */
	private int id;
	/**
	 * 父节点id
	 */
	private int pId;
	/**
	 * 是否展开
	 */
	private boolean isExpand = false;
	private boolean isChecked = false;//是否选中
	private boolean isHideChecked = true;//CheckBox是否隐藏
	/**
	 * 节点名字
	 */
	private String name;
	/**
	 * 节点级别
	 */
	private int level;
	/**
	 * 节点展示图标
	 */
	private int icon;
	/**
	 * 节点所含的子节点
	 */
	private List<Node> childrenNodes = new ArrayList<Node>();
	/**
	 * 节点的父节点
	 */
	private Node parent;

	public Node() {
	}

	public Node(int id, int pId, String name) {
		super();
		this.id = id;
		this.pId = pId;
		this.name = name;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public int getpId() {
		return pId;
	}

	public void setpId(int pId) {
		this.pId = pId;
	}

	public boolean isExpand() {
		return isExpand;
	}

	/**
	 * 当父节点收起。其子节点也收起
	 * @param isExpand
	 */
	public void setExpand(boolean isExpand) {
		this.isExpand = isExpand;
		if (!isExpand) {

			for (Node node : childrenNodes) {
				node.setExpand(isExpand);
			}
		}
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getLevel() {
		return parent == null ? 0 : parent.getLevel() + 1;
	}

	public void setLevel(int level) {
		this.level = level;
	}

	public int getIcon() {
		return icon;
	}

	public void setIcon(int icon) {
		this.icon = icon;
	}

	public List<Node> getChildrenNodes() {
		return childrenNodes;
	}

	public void setChildrenNodes(List<Node> childrenNodes) {
		this.childrenNodes = childrenNodes;
	}

	public Node getParent() {
		return parent;
	}

	public void setParent(Node parent) {
		this.parent = parent;
	}

	/**
	 * 推断是否是根节点
	 *
	 * @return
	 */
	public boolean isRoot() {
		return parent == null;
	}

	/**
	 * 推断是否是叶子节点
	 *
	 * @return
	 */
	public boolean isLeaf() {
		return childrenNodes.size() == 0;
	}

	/**
	 * 推断父节点是否展开
	 *
	 * @return
	 */
	public boolean isParentExpand()
	{
		if (parent == null)
			return false;
		return parent.isExpand();
	}

	public boolean isChecked() {
		return isChecked;
	}

	public void setChecked(boolean isChecked) {
		this.isChecked = isChecked;
	}

	public boolean isHideChecked() {
		return isHideChecked;
	}

	public void setHideChecked(boolean isHideChecked) {
		this.isHideChecked = isHideChecked;
	}
}
</span>

2.自己定义继承于BaseAdapter的适配器TreeListViewAdapter<T>

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo.tree;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ListView;
import android.widget.RelativeLayout;

/**
 * tree适配器
 * @param <T>
 */
public abstract class TreeListViewAdapter<T> extends BaseAdapter {

	protected Context mContext;
	/**
	 * 存储全部可见的Node
	 */
	protected List<Node> mNodes;
	protected LayoutInflater mInflater;
	/**
	 * 存储全部的Node
	 */
	protected List<Node> mAllNodes;

	/**
	 * 点击的回调接口
	 */
	private OnTreeNodeClickListener onTreeNodeClickListener;

	public interface OnTreeNodeClickListener {
		/**
		 * 处理node click事件
		 * @param node
		 * @param position
		 */
		void onClick(Node node, int position);
		/**
		 * 处理checkbox选择改变事件
		 * @param node
		 * @param position
		 * @param checkedNodes
		 */
		void onCheckChange(Node node, int position,List<Node> checkedNodes);
	}

	public void setOnTreeNodeClickListener(
			OnTreeNodeClickListener onTreeNodeClickListener) {
		this.onTreeNodeClickListener = onTreeNodeClickListener;
	}

	/**
	 *
	 * @param mTree
	 * @param context
	 * @param datas
	 * @param defaultExpandLevel
	 *            默认展开几级树
	 * @throws IllegalArgumentException
	 * @throws IllegalAccessException
	 */
	public TreeListViewAdapter(ListView mTree, Context context, List<T> datas,
			int defaultExpandLevel, boolean isHide)
			throws IllegalArgumentException, IllegalAccessException {
		mContext = context;
		/**
		 * 对全部的Node进行排序
		 */
		mAllNodes = TreeHelper
				.getSortedNodes(datas, defaultExpandLevel, isHide);
		/**
		 * 过滤出可见的Node
		 */
		mNodes = TreeHelper.filterVisibleNode(mAllNodes);
		mInflater = LayoutInflater.from(context);

		/**
		 * 设置节点点击时。能够展开以及关闭；而且将ItemClick事件继续往外发布
		 */
		mTree.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				expandOrCollapse(position);

				if (onTreeNodeClickListener != null) {
					onTreeNodeClickListener.onClick(mNodes.get(position),
							position);
				}
			}

		});

	}

	/**
	 * 对应ListView的点击事件 展开或关闭某节点
	 *
	 * @param position
	 */
	public void expandOrCollapse(int position) {
		Node n = mNodes.get(position);

		if (n != null)// 排除传入參数错误异常
		{
			if (!n.isLeaf()) {
				n.setExpand(!n.isExpand());
				mNodes = TreeHelper.filterVisibleNode(mAllNodes);
				notifyDataSetChanged();// 刷新视图
			}
		}
	}

	@Override
	public int getCount() {
		return mNodes.size();
	}

	@Override
	public Object getItem(int position) {
		return mNodes.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		final Node node = mNodes.get(position);

		convertView = getConvertView(node, position, convertView, parent);
		// 设置内边距
		convertView.setPadding(node.getLevel() * 30, 3, 3, 3);
		if (!node.isHideChecked()) {
			//获取各个节点所在的父布局
			RelativeLayout myView = (RelativeLayout) convertView;
			//父布局下的CheckBox
			CheckBox cb = (CheckBox) myView.getChildAt(1);
			cb.setOnCheckedChangeListener(new OnCheckedChangeListener(){

				@Override
				public void onCheckedChanged(CompoundButton buttonView,
						boolean isChecked) {
					TreeHelper.setNodeChecked(node, isChecked);
					List<Node> checkedNodes = new ArrayList<Node>();
					for(Node n:mAllNodes){
						if(n.isChecked()){
							checkedNodes.add(n);
						}
					}

					onTreeNodeClickListener.onCheckChange(node,position,checkedNodes);
					TreeListViewAdapter.this.notifyDataSetChanged();
				}

			});
		}

		return convertView;
	}

	public abstract View getConvertView(Node node, int position,
			View convertView, ViewGroup parent);

	/**
	 * 更新
	 * @param isHide
	 */
	public void updateView(boolean isHide){
		for(Node node:mAllNodes){
			node.setHideChecked(isHide);
		}

		this.notifyDataSetChanged();
	}

}
</span>

3.Node节点实现帮助类TreeHelper.java

<span style="font-family:KaiTi_GB2312;font-size:18px;">package com.example.customtreeviewdemo.tree;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import com.example.customtreeviewdemo.R;

public class TreeHelper {

	/**
	 * 依据全部节点获取可见节点
	 *
	 * @param allNodes
	 * @return
	 */
	public static List<Node> filterVisibleNode(List<Node> allNodes) {
		List<Node> visibleNodes = new ArrayList<Node>();
		for (Node node : allNodes) {
			// 假设为根节点。或者上层文件夹为展开状态
			if (node.isRoot() || node.isParentExpand()) {
				setNodeIcon(node);
				visibleNodes.add(node);
			}
		}
		return visibleNodes;
	}

	/**
	 * 获取排序的全部节点
	 *
	 * @param datas
	 * @param defaultExpandLevel
	 * @return
	 * @throws IllegalArgumentException
	 * @throws IllegalAccessException
	 */
	public static <T> List<Node> getSortedNodes(List<T> datas,
			int defaultExpandLevel, boolean isHide)
			throws IllegalAccessException, IllegalArgumentException {
		List<Node> sortedNodes = new ArrayList<Node>();
		// 将用户数据转化为List<Node>
		List<Node> nodes = convertData2Nodes(datas, isHide);
		// 拿到根节点
		List<Node> rootNodes = getRootNodes(nodes);
		// 排序以及设置Node间关系
		for (Node node : rootNodes) {
			addNode(sortedNodes, node, defaultExpandLevel, 1);
		}
		return sortedNodes;
	}

	/**
	 * 把一个节点上的全部的内容都挂上去
	 */
	private static void addNode(List<Node> nodes, Node node,
			int defaultExpandLeval, int currentLevel) {

		nodes.add(node);
		if (defaultExpandLeval >= currentLevel) {
			node.setExpand(true);
		}

		if (node.isLeaf())
			return;
		for (int i = 0; i < node.getChildrenNodes().size(); i++) {
			addNode(nodes, node.getChildrenNodes().get(i), defaultExpandLeval,
					currentLevel + 1);
		}
	}

	/**
	 * 获取全部的根节点
	 *
	 * @param nodes
	 * @return
	 */
	public static List<Node> getRootNodes(List<Node> nodes) {
		List<Node> rootNodes = new ArrayList<Node>();
		for (Node node : nodes) {
			if (node.isRoot()) {
				rootNodes.add(node);
			}
		}

		return rootNodes;
	}

	/**
	 * 将泛型datas转换为node
	 *
	 * @param datas
	 * @return
	 * @throws IllegalArgumentException
	 * @throws IllegalAccessException
	 */
	public static <T> List<Node> convertData2Nodes(List<T> datas, boolean isHide)
			throws IllegalAccessException, IllegalArgumentException {
		List<Node> nodes = new ArrayList<Node>();
		Node node = null;

		for (T t : datas) {
			int id = -1;
			int pId = -1;
			String name = null;

			Class<? extends Object> clazz = t.getClass();
			Field[] declaredFields = clazz.getDeclaredFields();
			/**
			 * 与MyNodeBean实体一一相应
			 */
			for (Field f : declaredFields) {
				if ("id".equals(f.getName())) {
					f.setAccessible(true);
					id = f.getInt(t);
				}

				if ("pId".equals(f.getName())) {
					f.setAccessible(true);
					pId = f.getInt(t);
				}

				if ("name".equals(f.getName())) {
					f.setAccessible(true);
					name = (String) f.get(t);
				}

				if ("desc".equals(f.getName())) {
					continue;
				}

				if ("length".equals(f.getName())) {
					continue;
				}

				if (id == -1 && pId == -1 && name == null) {
					break;
				}
			}

			node = new Node(id, pId, name);
			node.setHideChecked(isHide);
			nodes.add(node);
		}

		/**
		 * 比較nodes中的全部节点，分别加入children和parent
		 */
		for (int i = 0; i < nodes.size(); i++) {
			Node n = nodes.get(i);
			for (int j = i + 1; j < nodes.size(); j++) {
				Node m = nodes.get(j);
				if (n.getId() == m.getpId()) {
					n.getChildrenNodes().add(m);
					m.setParent(n);
				} else if (n.getpId() == m.getId()) {
					n.setParent(m);
					m.getChildrenNodes().add(n);
				}
			}
		}

		for (Node n : nodes) {
			setNodeIcon(n);
		}
		return nodes;
	}

	/**
	 * 设置打开。关闭icon
	 *
	 * @param node
	 */
	public static void setNodeIcon(Node node) {
		if (node.getChildrenNodes().size() > 0 && node.isExpand()) {
			node.setIcon(R.drawable.tree_expand);
		} else if (node.getChildrenNodes().size() > 0 && !node.isExpand()) {
			node.setIcon(R.drawable.tree_econpand);
		} else
			node.setIcon(-1);
	}

	public static void setNodeChecked(Node node, boolean isChecked) {
		// 自己设置是否选择
		node.setChecked(isChecked);
		/**
		 * 非叶子节点,子节点处理
		 */
		setChildrenNodeChecked(node, isChecked);
		/** 父节点处理 */
		setParentNodeChecked(node);

	}

	/**
	 * 非叶子节点,子节点处理
	 */
	private static void setChildrenNodeChecked(Node node, boolean isChecked) {
		node.setChecked(isChecked);
		if (!node.isLeaf()) {
			for (Node n : node.getChildrenNodes()) {
				// 全部子节点设置是否选择
				setChildrenNodeChecked(n, isChecked);
			}
		}
	}

	/**
	 * 设置父节点选择
	 *
	 * @param node
	 */
	private static void setParentNodeChecked(Node node) {

		/** 非根节点 */
		if (!node.isRoot()) {
			Node rootNode = node.getParent();
			boolean isAllChecked = true;
			for (Node n : rootNode.getChildrenNodes()) {
				if (!n.isChecked()) {
					isAllChecked = false;
					break;
				}
			}

			if (isAllChecked) {
				rootNode.setChecked(true);
			} else {
				rootNode.setChecked(false);
			}
			setParentNodeChecked(rootNode);
		}
	}

}
</span>

以上就是本文的全部内容。

源代码地址：http://download.csdn.net/detail/a123demi/8109643