android多级树形列表，android实战开发教程

皇甫树

2023-12-01

isHide = false;

}else{

isHide = true;

}

adapter.updateView(isHide);

}

});

try {

adapter = new MyTreeListViewAdapter(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 checkedNodes) {

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) {

e.printStackTrace();

} catch (IllegalAccessException e) {

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”));

}

Adapter

这个adapter是继承了自己的定义的一个TreeListViewAdapter，核心实现都是在TreeListViewAdapter这个里面

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 extends TreeListViewAdapter {

public MyTreeListViewAdapter(ListView mTree, Context context,

List 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);

}

自定义TreeListViewAdapter 这个是整个树形结构的一个适配器，这里面主要是实现对Node节点的操作点击，选中改变更新等

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

public abstract class TreeListViewAdapter extends BaseAdapter {

protected Context mContext;

/**

存储所有可见的Node

protected List mNodes;

protected LayoutInflater mInflater;

/**

存储所有的Node

protected List 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 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 datas,

int defaultExpandLevel, boolean isHide)

throws IllegalArgumentException, IllegalAccessException {

mContext = context;

/**

对所有的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，可以展开以及关闭；并且将ItemClick事件继续往外公布

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);

}

});

}

/**

相应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)// 排除传入参数错误异常

{

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 checkedNodes = new ArrayList();

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();

}

node 模型类

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;

}

TreeHelper这个也是核心操作类，主要功能是将业务数据和节点数据进行匹配

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 {

/**

根据所有节点获取可见节点
@param allNodes
@return

public static List filterVisibleNode(List allNodes) {

List visibleNodes = new ArrayList();

for (Node node : allNodes) {

// 如果为根节点，或者上层目录为展开状态

if (node.isRoot() || node.isParentExpand()) {

setNodeIcon(node);

visibleNodes.add(node);

}

return visibleNodes;

}

/**

获取排序的所有节点
@param datas
@param defaultExpandLevel
@return
@throws IllegalArgumentException
@throws IllegalAccessException

public static List getSortedNodes(List datas,

int defaultExpandLevel, b

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oolean isHide)

throws IllegalAccessException, IllegalArgumentException {

List sortedNodes = new ArrayList();

// 将用户数据转化为List

List nodes = convertData2Nodes(datas, isHide);

// 拿到根节点

List rootNodes = getRootNodes(nodes);

// 排序以及设置Node间关系

for (Node node : rootNodes) {

addNode(sortedNodes, node, defaultExpandLevel, 1);

}

return sortedNodes;

}

/**

把一个节点上的所有的内容都挂上去

private static void addNode(List 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);

}

/**

获取所有的根节点
@param nodes
@return

public static List getRootNodes(List nodes) {

android多级树形列表，android实战开发教程

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