效果: 
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView android:id="@+id/icon" android:layout_width="wrap_content"
android:layout_height="fill_parent" android:layout_marginRight="6.0dip"
android:layout_alignParentTop="true" android:layout_alignParentBottom="true" />
<!--<TextView android:id="@+id/text" android:layout_gravity="center_vertical"
android:layout_weight="1.0" android:layout_height="wrap_content" android:layout_width="0dip"
android:textAppearance="?android:attr/textAppearanceMedium" android:singleLine="true"
android:textColor="#ffffff" /> -->
<TextView android:textAppearance="?android:textAppearanceMedium"
android:gravity="center_vertical" android:id="@+id/text"
android:textColor="#ffffff" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:singleLine="true"
android:layout_toRightOf="@id/icon" android:layout_alignParentTop="true"
android:layout_alignParentBottom="true" />
</RelativeLayout>
TreeElement.java:
Java代码
package com.iaiai;
import java.util.ArrayList;
/**
*
* <p>
* Title: TreeElement.java
* </p>
* <p>
* E-Mail: 176291935@qq.com
* </p>
* <p>
* QQ: 176291935
* </p>
* <p>
* Http: iaiai.iteye.com
* </p>
* <p>
* Create time: 2011-8-20
* </p>
*
* @author 丸子
* @version 0.0.1
*/
public class TreeElement {
private String id;
private String outlineTitle;
private boolean mhasParent;
private boolean mhasChild;
private TreeElement parent;
private int level;
private ArrayList<TreeElement> childList = new ArrayList<TreeElement>();
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getOutlineTitle() {
return outlineTitle;
}
public void setOutlineTitle(String outlineTitle) {
this.outlineTitle = outlineTitle;
}
public boolean isMhasParent() {
return mhasParent;
}
public void setMhasParent(boolean mhasParent) {
this.mhasParent = mhasParent;
}
public boolean isMhasChild() {
return mhasChild;
}
public void setMhasChild(boolean mhasChild) {
this.mhasChild = mhasChild;
}
public int getLevel() {
return level;
}
public void setLevel(int level) {
this.level = level;
}
public boolean isExpanded() {
return expanded;
}
public void setExpanded(boolean expanded) {
this.expanded = expanded;
}
public ArrayList<TreeElement> getChildList() {
return childList;
}
public TreeElement getParent() {
return parent;
}
public void setParent(TreeElement parent) {
this.parent = parent;
}
// private OutlineElement outlineElement;
private boolean expanded;
public void addChild(TreeElement c) {
this.childList.add(c);
this.mhasParent = false;
this.mhasChild = true;
c.parent = this;
c.level = this.level + 1;
}
public TreeElement(String id, String title) {
super();
this.id = id;
this.outlineTitle = title;
this.level = 0;
this.mhasParent = true;
this.mhasChild = false;
this.parent = null;
}
public TreeElement(String id, String outlineTitle, boolean mhasParent,
boolean mhasChild, TreeElement parent, int level, boolean expanded) {
super();
this.id = id;
this.outlineTitle = outlineTitle;
this.mhasParent = mhasParent;
this.mhasChild = mhasChild;
this.parent = parent;
if (parent != null) {
this.parent.getChildList().add(this);
}
this.level = level;
this.expanded = expanded;
}
}
TreeView.java:
Java代码
package com.iaiai;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
/**
*
* <p>
* Title: TreeView.java
* </p>
* <p>
* E-Mail: 176291935@qq.com
* </p>
* <p>
* QQ: 176291935
* </p>
* <p>
* Http: iaiai.iteye.com
* </p>
* <p>
* Create time: 2011-8-20
* </p>
*
* @author 丸子
* @version 0.0.1
*/
public class TreeView extends ListActivity {
private ArrayList<TreeElement> mPdfOutlinesCount = new ArrayList<TreeElement>();
private TreeViewAdapter treeViewAdapter = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initialData();
treeViewAdapter = new TreeViewAdapter(this, R.layout.main,
mPdfOutlinesCount);
setListAdapter(treeViewAdapter);
registerForContextMenu(getListView());
}
private void initialData() {
TreeElement element1 = new TreeElement("01", "关键类");
TreeElement element2 = new TreeElement("02", "应用程序组件");
TreeElement element3 = new TreeElement("03", "Activity和任务");
TreeElement element4 = new TreeElement("04", "激活组件：intent");
TreeElement element5 = new TreeElement("05", "关闭组件");
TreeElement element6 = new TreeElement("06", "manifest文件");
TreeElement element7 = new TreeElement("07", "Intent过滤器");
TreeElement element8 = new TreeElement("08", "Affinity（吸引力）和新任务");
TreeElement element9 = new TreeElement("09", "加载模式");
TreeElement element10 = new TreeElement("10", "加载模式孩子1");
TreeElement element11 = new TreeElement("11", "加载模式孩子2");
TreeElement element12 = new TreeElement("12", "加载模式孩子2的孩子1");
TreeElement element13 = new TreeElement("13", "加载模式孩子2的孩子2");
TreeElement element14 = new TreeElement("14", "加载模式孩子1的孩子1");
TreeElement element15 = new TreeElement("15", "加载模式孩子1的孩子2");
TreeElement element16 = new TreeElement("16", "加载模式孩子1的孩子3");
TreeElement element17 = new TreeElement("17", "加载模式孩子1的孩子4");
TreeElement element18 = new TreeElement("18", "加载模式孩子1的孩子5");
TreeElement element19 = new TreeElement("19", "加载模式孩子1的孩子6");
mPdfOutlinesCount.add(element1);
mPdfOutlinesCount.add(element2);
mPdfOutlinesCount.add(element9);
element2.addChild(element3);
element1.addChild(element4);
element1.addChild(element5);
element1.addChild(element6);
element1.addChild(element7);
element7.addChild(element8);
element9.addChild(element10);
element9.addChild(element11);
element11.addChild(element12);
element11.addChild(element13);
element10.addChild(element14);
element10.addChild(element15);
element10.addChild(element16);
element10.addChild(element17);
element10.addChild(element18);
element10.addChild(element19);
}
@SuppressWarnings("unchecked")
private class TreeViewAdapter extends ArrayAdapter {
public TreeViewAdapter(Context context, int textViewResourceId,
List objects) {
super(context, textViewResourceId, objects);
mInflater = LayoutInflater.from(context);
mfilelist = objects;
mIconCollapse = BitmapFactory.decodeResource(
context.getResources(), R.drawable.outline_list_collapse);
mIconExpand = BitmapFactory.decodeResource(context.getResources(),
R.drawable.outline_list_expand);
}
private LayoutInflater mInflater;
private List<TreeElement> mfilelist;
private Bitmap mIconCollapse;
private Bitmap mIconExpand;
public int getCount() {
return mfilelist.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
/* if (convertView == null) { */
convertView = mInflater.inflate(R.layout.main, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
holder.icon = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(holder);
/*
* } else { holder = (ViewHolder) convertView.getTag(); }
*/
final TreeElement obj = mfilelist.get(position);
holder.text.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.i("TreeView", "obj.id:" + obj.getId());
}
});
int level = obj.getLevel();
holder.icon.setPadding(25 * (level + 1),
holder.icon.getPaddingTop(), 0,
holder.icon.getPaddingBottom());
holder.text.setText(obj.getOutlineTitle());
if (obj.isMhasChild() && (obj.isExpanded() == false)) {
holder.icon.setImageBitmap(mIconCollapse);
} else if (obj.isMhasChild() && (obj.isExpanded() == true)) {
holder.icon.setImageBitmap(mIconExpand);
} else if (!obj.isMhasChild()) {
holder.icon.setImageBitmap(mIconCollapse);
holder.icon.setVisibility(View.INVISIBLE);
}
return convertView;
}
class ViewHolder {
TextView text;
ImageView icon;
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Log.i("TreeView", "position:" + position);
if (!mPdfOutlinesCount.get(position).isMhasChild()) {
Toast.makeText(this, mPdfOutlinesCount.get(position)
.getOutlineTitle(), 2000);
/*
* int pageNumber; Intent i = getIntent(); element element =
* mPdfOutlinesCount .get(position); pageNumber =
* element.getOutlineElement().pageNumber; if (pageNumber <= 0) {
* String name = element.getOutlineElement().destName; pageNumber =
* idocviewer.getPageNumberForNameForOutline(name);
* element.getOutlineElement().pageNumber = pageNumber;
* element.getOutlineElement().destName = null; }
* i.putExtra("PageNumber", pageNumber); setResult(RESULT_OK, i);
* finish();
*/
return;
}
if (mPdfOutlinesCount.get(position).isExpanded()) {
mPdfOutlinesCount.get(position).setExpanded(false);
TreeElement element = mPdfOutlinesCount.get(position);
ArrayList<TreeElement> temp = new ArrayList<TreeElement>();
for (int i = position + 1; i < mPdfOutlinesCount.size(); i++) {
if (element.getLevel() >= mPdfOutlinesCount.get(i).getLevel()) {
break;
}
temp.add(mPdfOutlinesCount.get(i));
}
mPdfOutlinesCount.removeAll(temp);
treeViewAdapter.notifyDataSetChanged();
/*
* fileExploreAdapter = new TreeViewAdapter(this, R.layout.outline,
* mPdfOutlinesCount);
*/
// setListAdapter(fileExploreAdapter);
} else {
TreeElement obj = mPdfOutlinesCount.get(position);
obj.setExpanded(true);
int level = obj.getLevel();
int nextLevel = level + 1;
for (TreeElement element : obj.getChildList()) {
element.setLevel(nextLevel);
element.setExpanded(false);
mPdfOutlinesCount.add(position + 1, element);
}
treeViewAdapter.notifyDataSetChanged();
/*
* fileExploreAdapter = new TreeViewAdapter(this, R.layout.outline,
* mPdfOutlinesCount);
*/
// setListAdapter(fileExploreAdapter);
}
}
}