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。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;
    }

}
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();
                        }

                }
        }
}

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);

        }
}