Android中ExpandableListView控件基本使用

本文采用一个Demo来展示Android中ExpandableListView控件的使用，如如何在组/子ListView中绑定数据源。直接上代码如下：

程序结构图：

layout目录下的 main.xml 文件源码如下：

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<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!--我们会自己定义listview的显示方式（在另外一个布局文件里边）不用默认的方式
如果自定义listview的显示方式这里这个android:id="@id/android:list"必须这样写-->
<!--android:drawSelectOnTop="false"此属性用来设置listview上的背景颜色会不会
挡住（覆盖）内容,如果这是为false就表示不会覆盖掉-->
<ExpandableListView
android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawSelectorOnTop="false"/>
</LinearLayout>

包 com.andyidea.demo中ContactsActivity.java源码如下：

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packagecom.andyidea.demo;
importjava.util.ArrayList;
importjava.util.List;
importandroid.app.ExpandableListActivity;
importandroid.os.Bundle;
importandroid.view.Gravity;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.view.Window;
importandroid.widget.AbsListView;
importandroid.widget.BaseExpandableListAdapter;
importandroid.widget.TextView;
publicclassContactsActivityextendsExpandableListActivity{
List<String>group;//组列表
List<List<String>>child;//子列表
ContactsInfoAdapteradapter;//数据适配器
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);//设置为无标题
setContentView(R.layout.main);
getExpandableListView().setBackgroundResource(R.drawable.default_bg);
initializeData();
getExpandableListView().setAdapter(newContactsInfoAdapter());
getExpandableListView().setCacheColorHint(0);//设置拖动列表的时候防止出现黑色背景
}
/**
*初始化组、子列表数据
*/
privatevoidinitializeData(){
group=newArrayList<String>();
child=newArrayList<List<String>>();
addInfo("Andy",newString[]{"male","138123***","GuangZhou"});
addInfo("Fairy",newString[]{"female","138123***","GuangZhou"});
addInfo("Jerry",newString[]{"male","138123***","ShenZhen"});
addInfo("Tom",newString[]{"female","138123***","ShangHai"});
addInfo("Bill",newString[]{"male","138231***","ZhanJiang"});
}
/**
*模拟给组、子列表添加数据
*@paramg-group
*@paramc-child
*/
privatevoidaddInfo(Stringg,String[]c){
group.add(g);
List<String>childitem=newArrayList<String>();
for(inti=0;i<c.length;i++){
childitem.add(c[i]);
}
child.add(childitem);
}
classContactsInfoAdapterextendsBaseExpandableListAdapter{
//-----------------Child----------------//
@Override
publicObjectgetChild(intgroupPosition,intchildPosition){
returnchild.get(groupPosition).get(childPosition);
}
@Override
publiclonggetChildId(intgroupPosition,intchildPosition){
returnchildPosition;
}
@Override
publicintgetChildrenCount(intgroupPosition){
returnchild.get(groupPosition).size();
}
@Override
publicViewgetChildView(intgroupPosition,intchildPosition,
booleanisLastChild,ViewconvertView,ViewGroupparent){
Stringstring=child.get(groupPosition).get(childPosition);
returngetGenericView(string);
}
//----------------Group----------------//
@Override
publicObjectgetGroup(intgroupPosition){
returngroup.get(groupPosition);
}
@Override
publiclonggetGroupId(intgroupPosition){
returngroupPosition;
}
@Override
publicintgetGroupCount(){
returngroup.size();
}
@Override
publicViewgetGroupView(intgroupPosition,booleanisExpanded,
ViewconvertView,ViewGroupparent){
Stringstring=group.get(groupPosition);
returngetGenericView(string);
}
//创建组/子视图
publicTextViewgetGenericView(Strings){
//LayoutparametersfortheExpandableListView
AbsListView.LayoutParamslp=newAbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,40);
TextViewtext=newTextView(ContactsActivity.this);
text.setLayoutParams(lp);
//Centerthetextvertically
text.setGravity(Gravity.CENTER_VERTICAL|Gravity.LEFT);
//Setthetextstartingposition
text.setPadding(36,0,0,0);
text.setText(s);
returntext;
}
@Override
publicbooleanhasStableIds(){
//TODOAuto-generatedmethodstub
returnfalse;
}
@Override
publicbooleanisChildSelectable(intgroupPosition,intchildPosition){
//TODOAuto-generatedmethodstub
returntrue;
}
}
}

最后，程序运行后截图如下：

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