ExpandableListView 的简单用法

来源：互联网发布：windows制作mac启动盘编辑：程序博客网时间：2024/04/28 03:57

直接附代码：

package com.example.expandablelistviewtest;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.Toast;
import android.widget.ExpandableListView.OnChildClickListener;

public class MainActivity extends Activity {

   private ExpandableListView myExpListview;
   private List<String> Kinds_grouplist;// 商品类父类
   private List<List<String>> Kinds_childlist;// 商品类子类

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       initData_Kindlist(null, null);
       myExpListview = (ExpandableListView) findViewById(R.id.myExpListview);
       myExpListview.setAdapter(new KindofGoodsAdapter(this, Kinds_grouplist,
               Kinds_childlist));
       myExpListview.setOnChildClickListener(new OnChildClickListener() {
           public boolean onChildClick(ExpandableListView parent, View v,
                   int groupPosition, int childPosition, long id) {
               String gpName = Kinds_grouplist.get(groupPosition);
               String clName = Kinds_childlist.get(groupPosition).get(
                       childPosition);
               Toast.makeText(MainActivity.this, gpName + " " + clName,
                       Toast.LENGTH_SHORT).show();
               return true;
           }
       });
   }

   /**
   * 初始化商品类
   */
   private void initData_Kindlist(List<String> grouplist,
           List<List<String>> childlist) {
       Kinds_grouplist = new ArrayList<String>();
       Kinds_childlist = new ArrayList<List<String>>();
       List list = new ArrayList<String>();
       for (int i = 0; i < 5; i++) {
           list.add("商品子类" + i);
       }
       addInfo("商品分类1", list);
       addInfo("商品分类2", list);
       addInfo("商品分类3", list);
   }

   /**
   * 添加一个商品类
   * @param g
   * @param c
   */
   private void addInfo(String group, List<String> child) {
       Kinds_grouplist.add(group);
       Kinds_childlist.add(child);
   }
}

package com.example.expandablelistviewtest;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

public class KindofGoodsAdapter extends BaseExpandableListAdapter{

   private Context context;
   private List<String> group;
   private List<List<String>> child;


   public KindofGoodsAdapter(Context context, List<String> group,
           List<List<String>> child) {
       super();
       this.context = context;
       this.group = group;
       this.child = child;
   }

   @Override
   public int getGroupCount() {
       // TODO Auto-generated method stub
       return group.size();
   }

   @Override
   public int getChildrenCount(int groupPosition) {
       // TODO Auto-generated method stub
       return child.size();
   }

   @Override
   public Object getGroup(int groupPosition) {
       // TODO Auto-generated method stub
       return group.get(groupPosition);
   }

   @Override
   public Object getChild(int groupPosition, int childPosition) {
       // TODO Auto-generated method stub
       return child.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 false;
   }

   @Override
   public View getGroupView(int groupPosition, boolean isExpanded,
           View convertView, ViewGroup parent) {
       if(convertView == null){
           convertView = LayoutInflater.from(context).inflate
                   (R.layout.list_item, null);
           TextView Tv_kindName = (TextView) convertView.findViewById(R.id.textView);
           Tv_kindName.setText(group.get(groupPosition));
       }else {
           TextView Tv_kindName = (TextView) convertView.findViewById(R.id.textView);
           Tv_kindName.setText(group.get(groupPosition));
       }
       return convertView;
   }

   @Override
   public View getChildView(int groupPosition, int childPosition,
           boolean isLastChild, View convertView, ViewGroup parent) {
       if(convertView == null){
           convertView = LayoutInflater.from(context).inflate
                   (R.layout.list_item, null);
           TextView Tv_kindName = (TextView) convertView.findViewById(R.id.textView);
           Tv_kindName.setText(child.get(groupPosition).get(childPosition));
       }else {
           TextView Tv_kindName = (TextView) convertView.findViewById(R.id.textView);
           Tv_kindName.setText(child.get(groupPosition).get(childPosition));
       }
       return convertView;
   }

   @Override
   public boolean isChildSelectable(int groupPosition, int childPosition) {
       // TODO Auto-generated method stub
       return true;
   }

}

activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <ExpandableListView
        android:id="@+id/myExpListview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

</RelativeLayout>

list_item.xml

child_list_item.xml

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