Android开发：BaseExpandableListAdapter的使用

项目需要展示一个通讯簿，通讯簿中的手机号码是分组的，要求勾选组时，自动勾选组下的手机号码，实现效果如下：

<!--StartFragment--> 下面是实现步骤。

1、新建类PhoneListItem，用于表示分组中的每一个手机号码。

package com.ydtf.android;

public class PhoneListItem {

public String phone , name ;

public boolean checked ;

public PhoneListItem(String _name,String _phone, boolean _checked){

name =_name;

phone =_phone;

checked =_checked;

}

}

3、新建类PhoneGroup，用于表示一个分组。

import java.util.List;

public class PhoneGroup {

public String title ;

private boolean checked ;

public List<PhoneListItem> children ;

public PhoneGroup(String title, boolean checked,List<PhoneListItem> children){

this . title =title;

setChecked(checked);

this . children =children;

}

public boolean getChecked(){

return checked ;

}

public void setChecked ( boolean b){

checked =b;

if ( children != null && children .size()>0){ //若children不为空，循环设置children的checked

for (PhoneListItem each : children ){

each. checked = checked ;

}

}

}

}

4、新建Activity布局文件phone_browser.xml，用于定义通讯簿的展现页面。

< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"

android:layout_width = "fill_parent" android:layout_height = "fill_parent"

android:orientation = "vertical" >

< ExpandableListView android:id = "@+id/phonelist"

android:layout_width = "fill_parent" android:layout_height = "0dip"

android:layout_weight = "1" />

</ LinearLayout >

5、新建类QxtPhoneSelect，用于呈现通讯簿的Activity页面。

package com.ydtf.android;

import java.util.ArrayList;

import java.util.List;

import com.ydtf.android.PhoneGroupAdapter.ExpandableListHolder;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.ExpandableListView;

public class QxtSelectPhone extends Activity implements

ExpandableListView.OnGroupClickListener,ExpandableListView.OnChildClickListener{

private List<PhoneGroup> groups ;

private PhoneGroupAdapter exlist_adapter = null ;

private ExpandableListView exlist ;

public void onCreate(Bundle savedInstanceState) {

super .onCreate(savedInstanceState);

//加载layout

setContentView(R.layout. phone_browser );

//取得 listview

exlist = (ExpandableListView) findViewById(R.id. phonelist );

//调用 init 方法，这个方法主要是,初始化一些数据

init();

//构建 expandablelistview 的适配器

exlist_adapter = new PhoneGroupAdapter( this , groups );

exlist .setOnChildClickListener( this );

exlist .setAdapter( exlist_adapter ); //绑定视图－适配器

}

private void init() {

groups = new ArrayList<PhoneGroup>();

//构建List用作group1的子项

List<PhoneListItem> group1_children = new ArrayList<PhoneListItem>();

//往List中添加内容

PhoneListItem item = new PhoneListItem( "和文明" , "1308763994" , false );

group1_children.add(item);

item = new PhoneListItem( "黄文明" , "1308763994" , false );

group1_children.add(item);

item = new PhoneListItem( "王文明" , "1308763994" , false );

group1_children.add(item);

//拼装成PhoneGroup

PhoneGroup phonegroup1= new PhoneGroup( "group1" , false ,group1_children);

//------把前面的代码复制一遍，再添加一个组group2

//构建List用作group2的子项

List<PhoneListItem> group2_children = new ArrayList<PhoneListItem>();

//往List中添加内容

item = new PhoneListItem( "张文明" , "1589065423" , false );

group2_children.add(item);

item = new PhoneListItem( "李文明" , "1589065423" , false );

group2_children.add(item);

item = new PhoneListItem( "赵文明" , "1589065423" , false );

group2_children.add(item);

//拼装成PhoneGroup

PhoneGroup phonegroup2= new PhoneGroup( "group2" , false ,group2_children);

//添加进groups数组

groups .add(phonegroup1);

groups .add(phonegroup2);

}

//当分组行背点击时，让分组呈现“选中／取消选中”状态。

@Override

public boolean onChildClick(ExpandableListView parent, View v,

int groupPosition, int childPosition, long id) {

PhoneGroupAdapter.ExpandableListHolder holder=(ExpandableListHolder) v.getTag();

holder. chkChecked .setChecked(!holder. chkChecked .isChecked());

groups .get(groupPosition). children .get( childPosition ). checked =

! groups .get(groupPosition). children .get(childPosition). checked ;

return false ;

}

@Override

public boolean onGroupClick(ExpandableListView parent, View v,

int groupPosition, long id) {

// groups.get(groupPosition).setChecked(!groups.get(groupPosition).getChecked());

// exlist_adapter.notifyDataSetChanged();

//

return false ;

}

}

Android开发：BaseExpandableListAdapter的使用