ExpanableListVIew一个奇妙的“手风琴”

ExpanableListView是android世界里的神话级别的组件，我个人是这样认为的，几乎在大部分的应用上都能看到它的影子。为了更好的让大家了解什么是ExpanableListView,本人小试牛刀自己写了一个ExpanableListView;话不多说上代码：

Campsite_expanable_list.java

import java.util.ArrayList;

import linkertimes.androidplatform.R;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.TextView;

public class Campsite_expanable_list extends Activity {
// 声明listView和adapter;
private ExpandableListView elv;
private CamAdapter_list adapter;

// 声明对象；
private Button nine_btn;
private Button list_btn;
private TextView camName_tv;

// 获取作品图片，获取参加的人数；
private ArrayList<Drawable> get_img_drawable_list;
private ArrayList<String> get_joinNum_list;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.setContentView(R.layout.cam_list);

// 调用方法进行初始化；
init();

// 获取Intent传过来的营地的信息；
Intent in = this.getIntent();
String camName_list = in.getStringExtra("camName");
camName_tv.setText(camName_list);

// 获取资源库控制类；
Resources res = this.getResources();

get_img_drawable_list.add(res.getDrawable(R.drawable.beauty));
get_img_drawable_list.add(res.getDrawable(R.drawable.beauty));
get_img_drawable_list.add(res.getDrawable(R.drawable.beauty));

get_joinNum_list.add(res.getString(R.string.joinNum));
get_joinNum_list.add(res.getString(R.string.joinNum));
get_joinNum_list.add(res.getString(R.string.joinNum));

// 初始化adapter;
adapter = new CamAdapter_list(this, get_img_drawable_list, get_joinNum_list);

// 对listView设置；
elv.setAdapter(adapter);
elv.setGroupIndicator(res.getDrawable(R.drawable.indicator));
elv.setIndicatorBounds(300, 320);
elv.setDivider(null);

// 展开listView的所有group分组；
expandAllGroups(elv,CamAdapter_list.ACTIVITYNUMS);

// 设置按钮的监听；
nine_btn.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Campsite_expanable_list.this.finish();
}
});
}

private void init() {
// 初始化listView;
elv = (ExpandableListView) this.findViewById(R.id.explv);

// 初始化ArrayList;
get_img_drawable_list = new ArrayList<Drawable>();
get_joinNum_list = new ArrayList<String>();

// 初始化按钮；
nine_btn = (Button) this.findViewById(R.id.ninego_button_list);
list_btn = (Button) this.findViewById(R.id.list_button_list);
list_btn.setBackgroundResource(R.drawable.list_pressed);
camName_tv = (TextView) this.findViewById(R.id.camName_list);
}

/**
* 用于展开所有的listView的group的方法；
* @param elv 被操作的对象实例；
* @param groupCount elv中所包含的group的个数；
*/
public static void expandAllGroups(ExpandableListView elv,int groupCount){
for(int i=0;i<groupCount;i++)
{
elv.expandGroup(i);
}
}
}

下面是xml布局文件部分：

cam.list.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<RelativeLayout
android:id="@+id/cam_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/pk_surface_bg" >

<Button
android:id="@+id/newPerson_enterButton_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dp"
android:layout_marginTop="5dp"
android:background="@drawable/enter_cam_selector" />

<TextView
android:id="@+id/camName_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
android:text="@string/fashion_campsite"
android:textColor="#960068"
android:textSize="20dp" />

<Button
android:id="@+id/ninego_button_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/newPerson_enterButton_list"
android:layout_marginLeft="30dp"
android:layout_toRightOf="@+id/camName_list"
android:background="@drawable/nine_ge" />

<Button
android:id="@+id/list_button_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/ninego_button"
android:layout_alignBottom="@+id/ninego_button_list"
android:layout_toRightOf="@+id/ninego_button_list"
android:background="@drawable/list" />

<ExpandableListView
android:id="@+id/explv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="53dp"
android:fadingEdge="none"
android:scrollbars="none"
>
</ExpandableListView>
</RelativeLayout>

</RelativeLayout>

适配器部分：

CamAdapter_list.java

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import linkertimes.androidplatform.R;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class CamAdapter_list extends BaseExpandableListAdapter {

public final static int ACTIVITYNUMS = 5;
ArrayList<Drawable> img;
ArrayList<String> info;
Context context;
ArrayList<String> groupList;
ArrayList<List<Map<String, Object>>> childList;
String[] title;

CamAdapter_list(Context context, ArrayList<Drawable> img,
ArrayList<String> info) {
this.img = img;
this.info = info;
this.context = context;

// 初始化ArrayList;
groupList = new ArrayList<String>();
childList = new ArrayList<List<Map<String, Object>>>();

// 初始化一个数组；
title = new String[] { "HOT", "New", "Voted", "Joined", "Friend's" };

// 为ArrayList添加数据;
for (int i = 0; i < ACTIVITYNUMS; i++) {
groupList.add(title[i]);
List<Map<String, Object>> children = new ArrayList<Map<String, Object>>();
for (int j = 0; j < img.size(); j++) {
Map<String, Object> map = new HashMap<String, Object>();
children.add(map);
map.put("img", img.get(j));
Log.e("img-->", img.get(j)+"");
map.put("info", info.get(j));
}

// 与父亲同一层；
childList.add(children);
}
}

@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childList.get(groupPosition).get(childPosition).get("img");
}

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

@Override
public View getChildView(int groupPosition, int childPosition, boolean arg2,
View convertView, ViewGroup arg4) {
// TODO Auto-generated method stub
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.adpter_child_layout, null);
}
TextView info = (TextView) convertView.findViewById(R.id.child_tv);
info.setText(childList.get(groupPosition).get(childPosition).get("info").toString());
ImageView img = (ImageView) convertView.findViewById(R.id.child_img);
img.setImageDrawable((Drawable) childList.get(groupPosition).get(childPosition).get("img"));
return convertView;
}

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

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

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

@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean arg1, View convertView,
ViewGroup arg3) {
// TODO Auto-generated method stub
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.adpter_group_layout, null);
}
TextView tv = (TextView) convertView.findViewById(R.id.group_tv);
tv.setText(groupList.get(groupPosition).toString());
return convertView;
}

@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}

@Override
public boolean isChildSelectable(int arg0, int arg1) {
// TODO Auto-generated method stub
return false;
}

}

以上就是本实例的主要源码，希望对大家的学习有所帮助暂时搁笔了。谢谢大家的支持，如果我写的还好希望大家给顶一下谢谢了！！！