ExpandableListView笔记.doc

ExpandableListView笔记 ExpandableListVivew是ListView的子类，它在普通ListView的基础上进行了扩展，它把应用中的列表项分为几组，每组里又可包含多个列表项。ExpandableListVivew的用法与普通ListView的用法非常相似，只是ExpandableListVivew显示的列表项应该由ExpandableAdapter提供。 ExpandableListVivew的代码实现： 在XML文件： 先建一个ExpandableListView XML文件 LinearLayout xmlns:android=/apk/res/android android:orientation=vertical android:layout_width=fill_parent android:layout_height=fill_parent android:background=@drawable/main_bg ExpandableListView android:id=@+id/main_expandableListView android:layout_width=fill_parent android:layout_height=fill_parent / /LinearLayout 再建一个ExpandableAdapter元素的XML文件 LinearLayout xmlns:android=/apk/res/android android:orientation=horizontal android:layout_width=fill_parent android:layout_height=fill_parent TextView android:id=@+id/main_activity_account_layout_textview android:layout_width=fill_parent android:layout_height=wrap_content android:gravity=center android:textColor=#000000 android:textSize=8pt/ /LinearLayout 在java文件中： private ExpandableListView expandListView; private ExpandableListAdapter adapter; private ExpandableListContextMenuInfo info; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); /**实例化ExpandableListView 对象*/ expandListView=(ExpandableListView)findViewById(R.id.main_expandableListView); /**一个baseExpandableListAdapter适配器*/ adapter=new BaseExpandableListAdapter() { @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } @Override public boolean hasStableIds() { return true; } @Override/**获得groupView*/ public View getGroupView(final int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) { LayoutInflater inflater=LayoutInflater.from(context); View view=inflater.inflate(R.layout.main_activity_category_layout,null); return view; }