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);        }}