Android关于自定义ExpandableListView样式

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="@id/android:list"
android:layout_width="match_parent"
android:layout_height="match_parent"
style="@style/myExpandableListView"
android:drawSelectorOnTop="false"
/>
<TextView
android:id="@id/android:empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="no data"
/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/groupTo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="40px"
android:paddingTop="3px"
android:paddingBottom="3px"
android:textSize="26sp"
android:text="No data"
/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/childTo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="50px"
android:paddingTop="5px"
android:paddingBottom="5px"
android:textSize="20sp"
android:text="No data"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/ic_picture" ></item>
</selector>

package org.wwj.view;

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

import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.widget.SimpleExpandableListAdapter;

public class MainActivity extends ExpandableListActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

//定义一个List，该List对象为一级条目提供数据
List<Map<String, String>> groups = new ArrayList<Map<String,String>>();
Map<String, String> group1 = new HashMap<String, String>();
group1.put("group", "第一组");
Map<String, String> group2 = new HashMap<String, String>();
group2.put("group", "第二组");
groups.add(group1);
groups.add(group2);

//定义一个List，该List对象为第一个一级条目提供二级条目的数据
List<Map<String, String>> child1 = new ArrayList<Map<String,String>>();
Map<String, String> child1data1 = new HashMap<String, String>();
child1data1.put("child", "第一条");
child1.add(child1data1);
Map<String, String> child1data2 = new HashMap<String, String>();
child1data2.put("child", "第二条");
child1.add(child1data2);

//定义一个List，该List对象为第二个一级条目提供二级条目的数据
List<Map<String, String>> child2 = new ArrayList<Map<String,String>>();
Map<String, String> child2data1 = new HashMap<String, String>();
child2data1.put("child", "第三条");
child2.add(child2data1);
Map<String, String> child2data2 = new HashMap<String, String>();
child2data2.put("child", "第四条");
child2.add(child2data2);

//定义一个List，该List对象存储所有的二级条目的数据
List<List<Map<String, String>>> childs = new ArrayList<List<Map<String,String>>>();
childs.add(child1);
childs.add(child2);

//生成一个SimpleExpandableListAdapter对象
//1.context
//2.一级条目的数据
//3.用来设置一级条目样式的布局文件
//4.指定一级条目数据的key
//5.指定一级条目数据显示控件的id
//6.指定二级条目的数据
//7.用来设置二级条目样式的布局文件
//8.指定二级条目数据的key
//9.指定二级条目数据显示控件的id
SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(this
, groups
, R.layout.group
, new String[]{"group"}
, new int[] {R.id.groupTo}
, childs
, R.layout.child
, new String[]{"child"}
, new int[] {R.id.childTo}
);
//将SimpleExpandableListAdapter对象设置给当前的ExpandableListActivity
setListAdapter(adapter);

}
}