ExpandableListView 的简单用法

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

<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=".MainActivity" >

<TextView

android:id="@+id/textView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:text="父条目"/>

</RelativeLayout>

child_list_item.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=".MainActivity" >

<TextView

android:id="@+id/textView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="20dp"

android:text="子条目"/>

</RelativeLayout>