ExpandListView--二级列表事例
<span style="font-size:24px;">
活动界面
public class MainActivity extends Activity {
private ExpandableListView el;
// 一级列表的列表
private List<String> grouplist;
// 二级标题的列表
private List<List<String>> itemlist;
public void getdata() {
grouplist = new ArrayList<String>();
grouplist.add("我的好友");
grouplist.add("我的家人");
grouplist.add("我的设备");
grouplist.add("同学");
grouplist.add("八维同事");
grouplist.add("八维市场部");
List<String> item = new ArrayList<String>();
item.add("好友1");
item.add("好友2");
List<String> item1 = new ArrayList<String>();
item1.add("家人1");
item1.add("家人2");
List<String> item2 = new ArrayList<String>();
item2.add("设备1");
item2.add("设备2");
List<String> item3 = new ArrayList<String>();
item3.add("同学1");
item3.add("同学2");
List<String> item4 = new ArrayList<String>();
item4.add("同事1");
item4.add("同事2");
List<String> item5 = new ArrayList<String>();
item5.add("晋中市场部");
item5.add("晋南市场部");
itemlist = new ArrayList<List<String>>();
itemlist.add(item);
itemlist.add(item1);
itemlist.add(item2);
itemlist.add(item3);
itemlist.add(item4);
itemlist.add(item5);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getdata();
el = (ExpandableListView) findViewById(R.id.el);
el.setAdapter(new Myad());
// 一级标题的点击事件
el.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
Toast.makeText(MainActivity.this, "第" + groupPosition + "组被点击",
0).show();
return false;
}
});
// 二级标题的点击事件
el.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(MainActivity.this,
itemlist.get(groupPosition).get(childPosition), 0)
.show();
return false;
}
});
}
class Myad implements ExpandableListAdapter {
@Override
public void registerDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
@Override
public int getGroupCount() {
// 返回一级标题的个数
return grouplist.size();
}
@Override
public int getChildrenCount(int groupPosition) {
// 返回一级标题对应的二级标题的个数
return itemlist.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return null;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return 0;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
// 得到一级标题的view
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
View view = View.inflate(MainActivity.this, R.layout.group_layout,
null);
TextView tv_group = (TextView) view.findViewById(R.id.tv_group);
tv_group.setText(grouplist.get(groupPosition));
return view;
}
// 得到二级标题的view
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
View vv = View
.inflate(MainActivity.this, R.layout.group_item, null);
TextView tv_item = (TextView) vv.findViewById(R.id.tv_item);
tv_item.setText(itemlist.get(groupPosition).get(childPosition));
return vv;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean areAllItemsEnabled() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
@Override
public void onGroupExpanded(int groupPosition) {
// TODO Auto-generated method stub
}
@Override
public void onGroupCollapsed(int groupPosition) {
// TODO Auto-generated method stub
}
@Override
public long getCombinedChildId(long groupId, long childId) {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getCombinedGroupId(long groupId) {
// TODO Auto-generated method stub
return 0;
}
}
}</span>
主函数布局
<span style="font-size:24px;"><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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<include
android:id="@+id/include1"
android:layout_width="wrap_content"
android:layout_height="20dp"
layout="@layout/xiaoyun" />
<ExpandableListView
android:id="@+id/el"
android:layout_width="match_parent"
android:layout_height="400dp"
android:layout_marginTop="50dp" >
</ExpandableListView>
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/include1"
android:layout_alignTop="@+id/include1"
android:layout_marginTop="22dp"
android:text="好友分组" />
</RelativeLayout>
</span><pre name="code" class="java"><span style="font-size:24px;">一级列表布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="4/17" />
<TextView
android:id="@+id/tv_group"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="45dp"
android:text="textview" />
</RelativeLayout>
</span>
二级列表布局<span style="font-size:24px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/tv_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/imageView1"
android:text="TextView"
/>
</RelativeLayout></span>