使用ExpandableListView怎么实现一个二级列表
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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
package com.example.expandablelistview; import java.util.ArrayList; import java.util.List; import android.R.string; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.TextView; public class MainActivity extends Activity { private MainActivity.Madapder madapder; private ExpandableListView expandableListView; private ListallList; private List > list; @Override protected void onCreate(Bundle savedInstanceState) { 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=new Madapder(); expandableListView.setAdapter(madapder); } public void initData() { allList=new ArrayList
(); allList.add("列表①"); allList.add("列表②"); allList.add("列表③"); list=new ArrayList >(); List
list1=new ArrayList (); list1.add(new Person(" 虞姬")); list1.add(new Person(" 甄姬")); list1.add(new Person(" 阿狸")); list1.add(new Person(" 狐狸")); List list2=new ArrayList (); list2.add(new Person(" 李白")); list2.add(new Person(" 項羽")); list2.add(new Person(" 荊軻")); list2.add(new Person(" 曹操")); List list3=new ArrayList (); list3.add(new Person(" 公孙离")); list3.add(new Person(" 孙尚香")); list3.add(new Person(" 狄仁杰")); list3.add(new Person(" 蔡文姬")); list.add(list1); list.add(list2); list.add(list3); } class Madapder extends BaseExpandableListAdapter{ @Override public int getGroupCount() { // TODO Auto-generated method stub return allList.size(); } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return list.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return allList.get(groupPosition); } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return list.get(groupPosition).get(childPosition); } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; } @Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childPosition; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return true; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { GroupView groupView; if(convertView==null){ groupView=new GroupView(); //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)); return convertView; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { ViewHolder Holder; if(convertView==null){ Holder=new ViewHolder(); //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()); return convertView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } } class ViewHolder{ TextView text_name; } class GroupView{ TextView name; } }
Java_封装类
package com.example.expandablelistview; public class Person { String name; public Person() { // TODO Auto-generated constructor stub } public Person(String name) { super(); this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "Person [name=" + name + "]"; } }
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