listview实现的tree树结构

转自：http://www.eoeandroid.com/thread-309141-1-1.html 会更新版本

代码分享

代码名称:
myTreeViewDemo

代码描述:
使用listView实现的树状结构

代码托管地址:
-

代码作者:
阿富

效果图：



写在前面：

首先说明一下，这个只是最基本的树状组织结构的展现，我自己ps的连接线o(∩_∩)o ，至于实际使用中，可以对+、-号以及节点图标和文本加入点击事件；也可以在节点前加入checkbox等。

在做这个之前，网上也找了很久，找到的比较多的就是这个例子：http://www.apkbus.com/android-83520-1-1.html，但是这个不好看，所以基于这个才有了本例子。o(∩_∩)o 哈哈，第一次发自己写的东西，写的不好的地方请见谅（希望有人对性能优化，本人不是做安卓开发的，工作之余自学这个）；上代码：

TreeElement.java

package com.ccl.util.tree;

import java.util.ArrayList;

import java.util.List;

import android.view.View.OnClickListener;

public class TreeElement {

private int img_tree_space_n = R.drawable.tree_space_n;

private int img_tree_space_y = R.drawable.tree_space_y;

private String id;// 节点id

private String caption;// 节点标题

private String value;// 节点的值

private int level;// 层级

private TreeElement parent;// 该节点的父节点

private boolean isHasChild;// 是否有子节点

private boolean isExpanded;// 是否处于展开

private ArrayList<TreeElement> childList;// 子节点数组

private boolean isLastSibling;// 是否是同级节点的最后一个

private ArrayList<Integer> spaceList;// 组织结构线条数组

private int position;// 在listview中所处的位置

private OnClickListener captionOnClickListener;// 节点文本点击事件

public TreeElement() {

super();

}

public TreeElement(String id, String caption, String value,

Boolean isHasChild, OnClickListener captionOnClickListener) {

this.id = id;

this.caption = caption;

this.value = value;

this.parent = null;

this.level = 0;

this.isHasChild = isHasChild;

this.isExpanded = false;

if (isHasChild) {

this.childList = new ArrayList<TreeElement>();

}

this.isLastSibling = false;

this.setSpaceList(new ArrayList<Integer>());

this.position = 0;

this.setCaptionOnClickListener(captionOnClickListener);

}

// 添加子节点

public void addChild(TreeElement treeElement) {

treeElement.parent = this;

if (treeElement.getParent() != null

&& treeElement.getParent().getChildList().size() > 0) {// 将之前的同级节点的置为非最后一个节点

List<TreeElement> siblingList = treeElement.getParent()

.getChildList();

treeElement.getParent().getChildList().get(siblingList.size() - 1)

.setLastSibling(false);

}

this.childList.add(treeElement);

this.isHasChild = true;

treeElement.level = this.level + 1;

treeElement.isLastSibling = true;

if (this.level > 0) {

treeElement.getSpaceList().addAll(this.getSpaceList());

if (this.isLastSibling()) {

treeElement.getSpaceList().add(img_tree_space_n);

} else {

treeElement.getSpaceList().add(img_tree_space_y);

}

}

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getCaption() {

return caption;

}

public void setCaption(String caption) {

this.caption = caption;

}

public String getValue() {

return value;

}

public void setValue(String value) {

this.value = value;

}

public TreeElement getParent() {

return parent;

}

public void setParent(TreeElement parent) {

this.parent = parent;

}

public boolean isHasChild() {

return isHasChild;

}

public void setHasChild(boolean isHasChild) {

this.isHasChild = isHasChild;

}

public boolean isExpanded() {

return isExpanded;

}

public void setExpanded(boolean isExpanded) {

this.isExpanded = isExpanded;

}

public ArrayList<TreeElement> getChildList() {

return childList;

}

public void setChildList(ArrayList<TreeElement> childList) {

this.childList = childList;

}

public int getLevel() {

return level;

}

public void setLevel(int level) {

this.level = level;

}

public boolean isLastSibling() {

return isLastSibling;

}

public void setLastSibling(boolean isLastSibling) {

this.isLastSibling = isLastSibling;

}

public ArrayList<Integer> getSpaceList() {

return spaceList;

}

public void setSpaceList(ArrayList<Integer> spaceList) {

this.spaceList = spaceList;

}

public int getPosition() {

return position;

}

public void setPosition(int position) {

this.position = position;

}

public OnClickListener getCaptionOnClickListener() {

return captionOnClickListener;

}

public void setCaptionOnClickListener(OnClickListener captionOnClickListener) {

this.captionOnClickListener = captionOnClickListener;

}

}

复制代码
TreeViewAdapter.java

package com.ccl.util.tree;

import java.util.ArrayList;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

public class TreeViewAdapter extends ArrayAdapter<TreeElement> {

private int img_leaf = R.drawable.icon_user;// 没有子节点的节点图标

private int img_expand = R.drawable.outline_list_expand;// 展开的图标

private int img_collapse = R.drawable.outline_list_collapse;// 收缩的图标

private int img_tree_space_1 = R.drawable.tree_space_1;// 连接线

private int img_tree_space_2 = R.drawable.tree_space_2;

private Context context;

private LayoutInflater mInflater;

private ArrayList<TreeElement> treeElementList;

private int viewResourceId;

public TreeViewAdapter(Context context, int viewResourceId,

ArrayList<TreeElement> objects) {

super(context, viewResourceId, objects);

this.context = context;

this.mInflater = LayoutInflater.from(context);

this.treeElementList = objects;

this.viewResourceId = viewResourceId;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder;

convertView = mInflater.inflate(viewResourceId, null);

holder = new ViewHolder();

holder.caption = (TextView) convertView.findViewById(R.id.caption);

holder.icon = (ImageView) convertView.findViewById(R.id.icon);

holder.space = (LinearLayout) convertView.findViewById(R.id.space);

convertView.setTag(holder);

TreeElement treeElement = treeElementList.get(position);

int level = treeElement.getLevel();

if (level == 0) {// 根节点

} else {

ArrayList<Integer> spaceList = treeElement.getSpaceList();

// 绘制前面的组织架构线条

for (int i = 0; i < spaceList.size(); i++) {

ImageView img = new ImageView(context);

img.setImageResource(spaceList.get(i));

holder.space.addView(img);

}

ImageView img = new ImageView(context);

// 节点图标

if (treeElement.isLastSibling()) {

img.setImageResource(img_tree_space_2);

} else {

img.setImageResource(img_tree_space_1);

}

holder.space.addView(img);

}

if (treeElement.isHasChild()) {

if (treeElement.isExpanded()) {

holder.icon.setImageResource(img_expand);

} else {

holder.icon.setImageResource(img_collapse);

}

holder.icon.setOnClickListener(new TreeElementIconClickListener(

context, treeElementList, this, treeElement.getPosition()));

} else {

holder.icon.setImageResource(img_leaf);

}

holder.caption.setText(treeElement.getCaption());// 设置标题

if (treeElement.getCaptionOnClickListener() != null) {// 设置文字的点击事件

holder.caption.setTag(treeElement.getValue());

holder.caption.setOnClickListener(treeElement

.getCaptionOnClickListener());

}

return convertView;

}

class ViewHolder {

LinearLayout space;

TextView caption;

ImageView icon;

}

public static class TreeElementIconClickListener implements OnClickListener {

private Context context;

private ArrayList<TreeElement> treeElementList;

private TreeViewAdapter treeViewAdapter;

private int position;

public TreeElementIconClickListener(Context mContext,

ArrayList<TreeElement> mTreeElementList,

TreeViewAdapter mTreeViewAdapter, int position) {

this.context = mContext;

this.treeElementList = mTreeElementList;

this.treeViewAdapter = mTreeViewAdapter;

this.position = position;

}

@Override

public void onClick(View v) {

System.out.println("点击的position:" + position);

if (!treeElementList.get(position).isHasChild()) {

Toast.makeText(context,

treeElementList.get(position).getCaption(),

Toast.LENGTH_SHORT).show();

return;

}

if (treeElementList.get(position).isExpanded()) {

treeElementList.get(position).setExpanded(false);

TreeElement element = treeElementList.get(position);

ArrayList<TreeElement> temp = new ArrayList<TreeElement>();

for (int i = position + 1; i < treeElementList.size(); i++) {

if (element.getLevel() >= treeElementList.get(i).getLevel()) {

break;

}

temp.add(treeElementList.get(i));

}

treeElementList.removeAll(temp);

for (int i = position + 1; i < treeElementList.size(); i++) {

System.out.println(treeElementList.get(i).getCaption()

+ "@@@" + i);

treeElementList.get(i).setPosition(i);

}

treeViewAdapter.notifyDataSetChanged();

} else {

TreeElement obj = treeElementList.get(position);

obj.setExpanded(true);

int level = obj.getLevel();

int nextLevel = level + 1;

ArrayList<TreeElement> tempList = obj.getChildList();

for (int i = 0; i < tempList.size(); i++) {

TreeElement element = tempList.get(i);

element.setLevel(nextLevel);

element.setExpanded(false);

treeElementList.add(position + i + 1, element);

}

for (int i = position + 1; i < treeElementList.size(); i++) {

System.out.println(treeElementList.get(i).getCaption()

+ "@@@" + i);

treeElementList.get(i).setPosition(i);

}

treeViewAdapter.notifyDataSetChanged();

}

}

}

}

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MainActivity.java

package com.ccl.util.tree;

import java.util.ArrayList;

import com.ccl.util.tree.TreeViewAdapter.TreeElementIconClickListener;

import android.os.Bundle;

import android.app.Activity;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.ListView;

import android.widget.Toast;

public class MainActivity extends Activity {

private ListView lv_tree;

private TreeViewAdapter treeViewAdapter;

private ArrayList<TreeElement> mRootList;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

lv_tree = (ListView) findViewById(R.id.lv_tree);

mRootList = new ArrayList<TreeElement>();

treeViewAdapter = new TreeViewAdapter(this, R.layout.atom_tree,

mRootList);

lv_tree.setAdapter(treeViewAdapter);

OnClickListener myOnClickListener = new OnClickListener() {

@Override

public void onClick(View v) {

Toast.makeText(MainActivity.this, "--" + v.getTag(),

Toast.LENGTH_LONG).show();

}

};

TreeElement rootElement = new TreeElement("root", "root", "1", true,

null);

TreeElement treeElement1 = new TreeElement("node1", "节点1", "1", true,

null);

TreeElement treeElement2 = new TreeElement("node2", "节点2", "2", false,

myOnClickListener);

TreeElement treeElement3 = new TreeElement("node3", "节点3", "1", false,

myOnClickListener);

TreeElement treeElement4 = new TreeElement("node3", "节点4", "1", true,

myOnClickListener);

TreeElement treeElement1_1 = new TreeElement("node14", "节点1_1", "1",

true, myOnClickListener);

TreeElement treeElement1_2 = new TreeElement("node14", "节点1_2", "1",

false, myOnClickListener);

TreeElement treeElement1_3 = new TreeElement("node14", "节点1_3", "1",

true, myOnClickListener);

TreeElement treeElement1_1_1 = new TreeElement("node14", "节点1_1_1",

"1", false, myOnClickListener);

TreeElement treeElement1_3_1 = new TreeElement("node14", "节点1_3_1",

"1", true, myOnClickListener);

TreeElement treeElement1_3_2 = new TreeElement("node14", "节点1_3_2",

"1", false, myOnClickListener);

TreeElement treeElement1_3_1_1 = new TreeElement("node14", "节点1_3_1_1",

"1", false, myOnClickListener);

TreeElement treeElement4_1 = new TreeElement("node14", "节点4_1", "1",

true, myOnClickListener);

TreeElement treeElement4_2 = new TreeElement("node14", "节点4_2", "1",

false, myOnClickListener);

TreeElement treeElement4_3 = new TreeElement("node14", "节点4_3", "1",

true, myOnClickListener);

TreeElement treeElement4_1_1 = new TreeElement("node14", "节点4_1_1",

"1", false, myOnClickListener);

TreeElement treeElement4_3_1 = new TreeElement("node14", "节点4_3_1",

"1", false, myOnClickListener);

mRootList.add(rootElement);

rootElement.addChild(treeElement1);

rootElement.addChild(treeElement2);

rootElement.addChild(treeElement3);

rootElement.addChild(treeElement4);

treeElement1.addChild(treeElement1_1);

treeElement1.addChild(treeElement1_2);

treeElement1.addChild(treeElement1_3);

treeElement1_1.addChild(treeElement1_1_1);

treeElement1_3.addChild(treeElement1_3_1);

treeElement1_3.addChild(treeElement1_3_2);

treeElement1_3_1.addChild(treeElement1_3_1_1);

treeElement4.addChild(treeElement4_1);

treeElement4.addChild(treeElement4_2);

treeElement4.addChild(treeElement4_3);

treeElement4_1.addChild(treeElement4_1_1);

treeElement4_3.addChild(treeElement4_3_1);

treeViewAdapter.notifyDataSetChanged();

System.out.println(1111);

// 展开根目录

TreeElementIconClickListener mtest = new TreeElementIconClickListener(

MainActivity.this, mRootList, treeViewAdapter, 0);

mtest.onClick(null);

}

}

复制代码
最新代码（不定期修改）：

tree201310231140.zip (788.67
KB, 下载次数: 176)