ExpandableListView实现简单二级列表

2023-09-05 12:43:04 73

本文实例为大家分享了ExpandableListView实现简单二级列表的具体代码，供大家参考，具体内容如下

xml创建一个 ExpandableListView

ExpandableListView的一级列表布局

ExpandableListView的二级列表布局

Java代码

packagecom.example.expandablelistview;

importjava.util.ArrayList;
importjava.util.List;

importandroid.R.string;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.Menu;
importandroid.view.MenuItem;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseExpandableListAdapter;
importandroid.widget.ExpandableListView;
importandroid.widget.TextView;

publicclassMainActivityextendsActivity{
privateMainActivity.Madapdermadapder;
privateExpandableListViewexpandableListView;
privateListallList;
privateList>list;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取控件
expandableListView=(ExpandableListView)findViewById(R.id.expandableListView);
//初始化数据
initData();
//自定义适配器
madapder=newMadapder();
expandableListView.setAdapter(madapder);
}
publicvoidinitData(){
allList=newArrayList();
allList.add("列表①");
allList.add("列表②");
allList.add("列表③");
list=newArrayList>();
Listlist1=newArrayList();
list1.add(newPerson("虞姬"));
list1.add(newPerson("甄姬"));
list1.add(newPerson("阿狸"));
list1.add(newPerson("狐狸"));
Listlist2=newArrayList();
list2.add(newPerson("李白"));
list2.add(newPerson("項羽"));
list2.add(newPerson("荊軻"));
list2.add(newPerson("曹操"));
Listlist3=newArrayList();
list3.add(newPerson("公孙离"));
list3.add(newPerson("孙尚香"));
list3.add(newPerson("狄仁杰"));
list3.add(newPerson("蔡文姬"));
list.add(list1);
list.add(list2);
list.add(list3);
}
classMadapderextendsBaseExpandableListAdapter{

@Override
publicintgetGroupCount(){
//TODOAuto-generatedmethodstub
returnallList.size();
}

@Override
publicintgetChildrenCount(intgroupPosition){
//TODOAuto-generatedmethodstub
returnlist.get(groupPosition).size();
}

@Override
publicObjectgetGroup(intgroupPosition){
//TODOAuto-generatedmethodstub
returnallList.get(groupPosition);
}

@Override
publicObjectgetChild(intgroupPosition,intchildPosition){
//TODOAuto-generatedmethodstub
returnlist.get(groupPosition).get(childPosition);
}

@Override
publiclonggetGroupId(intgroupPosition){
//TODOAuto-generatedmethodstub
returngroupPosition;
}

@Override
publiclonggetChildId(intgroupPosition,intchildPosition){
//TODOAuto-generatedmethodstub
returnchildPosition;
}

@Override
publicbooleanhasStableIds(){
//TODOAuto-generatedmethodstub
returntrue;
}

@Override
publicViewgetGroupView(intgroupPosition,booleanisExpanded,
ViewconvertView,ViewGroupparent){
GroupViewgroupView;
if(convertView==null){
groupView=newGroupView();
//获取一级列表的布局
convertView=View.inflate(MainActivity.this,R.layout.item_1,null);
//复用控件
groupView.name=(TextView)convertView.findViewById(R.id.one_name);
//绑定
convertView.setTag(groupView);
}else{
groupView=(GroupView)convertView.getTag();
}
//给控件设置值
groupView.name.setText(allList.get(groupPosition));
returnconvertView;
}
@Override
publicViewgetChildView(intgroupPosition,intchildPosition,
booleanisLastChild,ViewconvertView,ViewGroupparent){
ViewHolderHolder;
if(convertView==null){
Holder=newViewHolder();
//获取二级列表的布局
convertView=View.inflate(MainActivity.this,R.layout.item_2,null);
//复用控件
Holder.text_name=(TextView)convertView.findViewById(R.id.tow_name);
//绑定
convertView.setTag(Holder);
}else{
Holder=(ViewHolder)convertView.getTag();
}
//给控件设置值
Holder.text_name.setText(list.get(groupPosition).get(childPosition).getName());
returnconvertView;
}

@Override
publicbooleanisChildSelectable(intgroupPosition,intchildPosition){
//TODOAuto-generatedmethodstub
returntrue;
}
}
classViewHolder{
TextViewtext_name;
}
classGroupView{
TextViewname;
}
}

Java_封装类

packagecom.example.expandablelistview;

publicclassPerson{
Stringname;
publicPerson(){
//TODOAuto-generatedconstructorstub
}
publicPerson(Stringname){
super();
this.name=name;
}
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
@Override
publicStringtoString(){
return"Person[name="+name+"]";
}

}

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毛票票。

ExpandableListView实现简单二级列表

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