android expandablelistview横向,完美实现ExpandableListView二级分栏效果

以你之姓@ 2022-10-16 04:45 188阅读 0赞

本文实例为大家分享了ExpandableListView二级分栏效果的具体代码，供大家参考，具体内容如下

对ExpandableListView控件进行封装(未自定义)直接上代码：

通用ViewHolder类，仅在setImageResource中添加代码

package com.svp.haoyan.expandablelistview.tool;

import android.content.Context;

import android.graphics.Bitmap;

import android.util.SparseArray;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

/\*\*

\* Created by haoyan on 2016/3/24.

\*/

public class ViewHolder \{

//存储数据

private SparseArray mViews;

private int mPosition;

private View mConvertView;

private boolean misExpanded;

public ViewHolder(Context context, ViewGroup parent, int layoutId, int position,boolean isExpanded) \{

this.mPosition=position;

this.mViews= new SparseArray();

this.misExpanded=isExpanded;

//三

mConvertView= LayoutInflater.from(context).inflate(layoutId,parent,false);

//一

mConvertView.setTag(this);

public static ViewHolder get(Context context,View convertView,

ViewGroup parent,int layoutId,int position,boolean isExpanded)\{

if (convertView==null)\{

return new ViewHolder(context,parent,layoutId,position,isExpanded);

\}else \{

//五 六

ViewHolder holder=(ViewHolder)convertView.getTag();

holder.mPosition=position;

return holder;

//通过viewId获取控件

//泛型T返回子类

public T getView(int viewId)\{

View view =mViews.get(viewId);

if (view==null)\{

//四

view=mConvertView.findViewById(viewId);

mViews.put(viewId,view);

return (T)view;

//八

public View getmConvertView() \{

return mConvertView;

/\*\*

\* 设置TextView的值

\* @param viewId

\* @param text

\* @return

\*/

//四 七 九

public ViewHolder setText(int viewId,String text)\{

TextView tv= getView(viewId);

tv.setText(text);

return this;

/\*\*

\* 一参传id，二参传图片地址，三参为true则调用点击变化效果，默认为false.

\* \*/

public ViewHolder setImageResource(int viewId,int resId,boolean expanded)\{

ImageView view= getView(viewId);

view.setImageResource(resId);

if (expanded)\{

if (misExpanded)\{

view.setVisibility(View.GONE);

\}else \{

view.setVisibility(View.VISIBLE);

return this;

public ViewHolder setImageBitamp(int viewId,Bitmap bitmap)\{

ImageView view= getView(viewId);

view.setImageBitmap(bitmap);

return this;

public ViewHolder setImageURI(int viewId,String uri)\{

ImageView view= getView(viewId);

// Imageloader.getInstance().loadImg(view,uri);

return this;

实体类Expand\_DTO:

package com.svp.haoyan.expandablelistview.dto;

/\*\*

\* Created by haoyan on 2016/5/7.

\*/

public class Expand\_DTO \{

private String name;

private String contents;

private int pic;

private int photo;

public static class Expand\_child \{

private String childname;

private String childcont;

public String getChildname() \{

return childname;

public void setChildname(String childname) \{

this.childname = childname;

public String getChildcont() \{

return childcont;

public void setChildcont(String childcont) \{

this.childcont = childcont;

public String getName() \{

return name;

public void setName(String name) \{

this.name = name;

public String getContents() \{

return contents;

public void setContents(String contents) \{

this.contents = contents;

public int getPic() \{

return pic;

public void setPic(int pic) \{

this.pic = pic;

public int getPhoto() \{

return photo;

public void setPhoto(int photo) \{

this.photo = photo;

接下来是最主要的Adapter：

package com.svp.haoyan.expandablelistview;

import android.content.Context;

import android.database.DataSetObserver;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ExpandableListAdapter;

import com.svp.haoyan.expandablelistview.tool.ViewHolder;

import java.util.List;

import java.util.Map;

/\*\*

\* Created by haoyan on 2016/4/28.

\*/

public abstract class MyExpandableListAdapterimplements ExpandableListAdapter \{

private Context mcontext;

private List mexpand\_dtos;

private Map> mmap = null;

public MyExpandableListAdapter(Context context, List expand\_dtos,Map> map) \{

this.mcontext = context;

this.mexpand\_dtos = expand\_dtos;

this.mmap=map;

/\*注册一个观察者(observer)，当此适配器数据修改时即调用此观察者。\*/

@Override

public void registerDataSetObserver(DataSetObserver observer) \{

/\*取消先前通过registerDataSetObserver(DataSetObserver)方式注册进该适配器中的观察者对象\*/

@Override

public void unregisterDataSetObserver(DataSetObserver observer) \{

/\*获取组的个数\*/

@Override

public int getGroupCount() \{

return mexpand\_dtos.size();

/\*返回在指定Group的Child数目。\*/

@Override

public int getChildrenCount(int groupPosition) \{

return mmap.get(groupPosition).size();

//获取当前父item的数据

@Override

public T getGroup(int groupPosition) \{

return mexpand\_dtos.get(groupPosition);

/\*获取与在指定group给予child相关的数据。\*/

@Override

public F getChild(int groupPosition, int childPosition) \{

return (mmap.get(groupPosition).get(childPosition));

/\*获取指定组的ID\*/

@Override

public long getGroupId(int groupPosition) \{

return groupPosition;

//得到子item的ID

@Override

public long getChildId(int groupPosition, int childPosition) \{

return childPosition;

//组和子元素是否持有稳定的ID,也就是底层数据的改变不会影响到它们。(没效果)

@Override

public boolean hasStableIds() \{

return true;

//设置父item组件

@Override

public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) \{

ViewHolder viewHolder = ViewHolder.get(mcontext, convertView, parent, R.layout.expand\_groupview, groupPosition,isExpanded);

convert(viewHolder, getGroup(groupPosition));

return viewHolder.getmConvertView();

//自己写

public abstract void convert(ViewHolder viewHolder, T t);

public abstract void convertchild(ViewHolder viewHolder, F f);

//设置子item的组件

@Override

public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) \{

ViewHolder viewHolder = ViewHolder.get(mcontext, convertView, parent, R.layout.expand\_childview, groupPosition,isLastChild);

convertchild(viewHolder, getChild(groupPosition,childPosition));

return viewHolder.getmConvertView();

/\*子元素是否处于组中的最后一个(对每个组的最后一个进行操作)\*/

//boolean isLastChild

/\*下边是未封装代码，提供参考\*/

// String Childname = (mmap.get(groupPosition).get(childPosition)).getChildname();

// LayoutInflater inflater = (LayoutInflater)mcontext.getSystemService(Context.LAYOUT\_INFLATER\_SERVICE);

// convertView = inflater.inflate(R.layout.expand\_childview, null);

// TextView tv\_child = (TextView) convertView.findViewById(R.id.tv\_child);

// tv\_child.setText(Childcont);

/\*是否选中指定位置上的子元素。\*/

@Override

public boolean isChildSelectable(int groupPosition, int childPosition) \{

return true;

/\*true所有条目可以选择和点击\*/

@Override

public boolean areAllItemsEnabled() \{

return false;

/\*如果当前适配器不包含任何数据则返回True。经常用来决定一个空视图是否应该被显示。

一个典型的实现将返回表达式getCount() == 0的结果，但是由于getCount()包含了头部和尾部，适配器可能需要不同的行为。\*/

@Override

public boolean isEmpty() \{

return false;

/\*当组展开状态的时候此方法被调用。\*/

@Override

public void onGroupExpanded(int groupPosition) \{

/\*当组收缩状态的时候此方法被调用。\*/

@Override

public void onGroupCollapsed(int groupPosition) \{

/\*根据所给的子ID号和组ID号返回唯一的ID。此外，若hasStableIds()是true，那么必须要返回稳定的ID。\*/

@Override

public long getCombinedChildId(long groupId, long childId) \{

return 0;

/\*同上\*/

@Override

public long getCombinedGroupId(long groupId) \{

return 0;

最后是调用类Activity:

package com.svp.haoyan.expandablelistview;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.widget.ExpandableListView;

import com.svp.haoyan.expandablelistview.dto.Expand\_DTO;

import com.svp.haoyan.expandablelistview.tool.ViewHolder;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

public class MainActivity extends AppCompatActivity \{

private ExpandableListView elistview;

private List expanddata;

private HashMap> map = null;

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

dataView();

expandView();

private void expandView() \{

elistview = (ExpandableListView) findViewById(R.id.expandable\_lv);

elistview.setAdapter(new MyExpandableListAdapter(this, expanddata,map) \{

@Override

public void convert(ViewHolder viewHolder, Expand\_DTO expand\_dto) \{

viewHolder.setText(R.id.tv\_expand, expand\_dto.getName())

.setText(R.id.tv\_expand\_two, expand\_dto.getContents())

.setImageResource(R.id.img\_expand, expand\_dto.getPic(),false)

.setImageResource(R.id.img\_expand\_two, expand\_dto.getPhoto(),false);

@Override

public void convertchild(ViewHolder viewHolder, Expand\_DTO.Expand\_child expand\_child) \{

viewHolder.setText(R.id.tv\_child,expand\_child.getChildname())

.setText(R.id.tv\_child2,expand\_child.getChildcont());

\});

//去掉自带箭头

elistview.setGroupIndicator(null);

private void dataView() \{

expanddata = new ArrayList();

Expand\_DTO bean\_zero = new Expand\_DTO();

bean\_zero.setName("android新技能1");

bean\_zero.setContents("1");

bean\_zero.setPic(R.drawable.icon\_check);

bean\_zero.setPhoto(R.drawable.travel\_airfare\_cn\_position);

expanddata.add(bean\_zero);

Expand\_DTO bean\_one = new Expand\_DTO();

bean\_one.setName("android新技能2");

bean\_one.setContents("2");

bean\_one.setPic(R.drawable.icon\_check);

bean\_one.setPhoto(R.drawable.travel\_airfare\_cn\_position);

expanddata.add(bean\_one);

Expand\_DTO bean\_two = new Expand\_DTO();

bean\_two.setName("android新技能3");

bean\_two.setContents("3");

bean\_two.setPic(R.drawable.icon\_check);

bean\_two.setPhoto(R.drawable.travel\_airfare\_cn\_position);

expanddata.add(bean\_two);

//这里可以使用SparseArray优化性能

map = new HashMap>();

List expand\_children\_zero=new ArrayList();

Expand\_DTO.Expand\_child child1=new Expand\_DTO.Expand\_child();

child1.setChildname("11111");

child1.setChildcont("22222");

expand\_children\_zero.add(child1);

Expand\_DTO.Expand\_child child2=new Expand\_DTO.Expand\_child();

child2.setChildname("3333333");

child2.setChildcont("4444444");

expand\_children\_zero.add(child2);

map.put(0,expand\_children\_zero);

List expand\_children\_one=new ArrayList();

Expand\_DTO.Expand\_child child3=new Expand\_DTO.Expand\_child();

child3.setChildname("55555");

child3.setChildcont("66666");

expand\_children\_one.add(child3);

Expand\_DTO.Expand\_child child4=new Expand\_DTO.Expand\_child();

child4.setChildname("77777");

child4.setChildcont("88888");

expand\_children\_one.add(child4);

map.put(1,expand\_children\_one);

List children\_data\_two=new ArrayList();

Expand\_DTO.Expand\_child child5=new Expand\_DTO.Expand\_child();

child5.setChildname("99999");

child5.setChildcont("00000");

children\_data\_two.add(child5);

Expand\_DTO.Expand\_child child6=new Expand\_DTO.Expand\_child();

child6.setChildname("12345");

child6.setChildcont("54321");

children\_data\_two.add(child6);

map.put(2,children\_data\_two);

完活布局很简单就不贴出来了，加上图片有图有真相：

![5414116e31ac8b155f28b7ebe6f4365a.png][]

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

[5414116e31ac8b155f28b7ebe6f4365a.png]: /images/20221014/671c2a0ad6d94df2b0d0e7284c7ad531.png

android expandablelistview横向,完美实现ExpandableListView二级分栏效果

发表评论取消回复

还没有评论，来说两句吧...

相关阅读

相关 Android ExpandableListView开发简介

相关 ExpandableListView 二级菜单的使用方式

相关 android expandablelistview横向,完美实现ExpandableListView二级分栏效果

相关 android中ExpandableListView的使用

相关 ExpandableListView 学习

相关 Android之ExpandableListView

相关 Android之实现QQ好友分组(ExpandableListView)

相关 ExpandableListView的使用

相关 ExpandableListView分组列表

相关 Android之ExpandableListView局部更新