ExpandableListView实现二层和三层列表源码

public class SuperTreeViewAdapter extends BaseExpandableListAdapter {static public class SuperTreeNode {Object parent;//二级树形菜单的结构体List<TreeViewAdapter.TreeNode> childs = new ArrayList<TreeViewAdapter.TreeNode>();}private List<SuperTreeNode> superTreeNodes = new ArrayList<SuperTreeNode>();private Context parentContext;private OnChildClickListener stvClickEvent;//外部回调函数public SuperTreeViewAdapter(Context view,OnChildClickListener stvClickEvent) {parentContext = view;this.stvClickEvent=stvClickEvent;}public List<SuperTreeNode> GetTreeNode() {return superTreeNodes;}public void UpdateTreeNode(List<SuperTreeNode> node) {superTreeNodes = node;}public void RemoveAll(){superTreeNodes.clear();}public Object getChild(int groupPosition, int childPosition) {return superTreeNodes.get(groupPosition).childs.get(childPosition);}public int getChildrenCount(int groupPosition) {return superTreeNodes.get(groupPosition).childs.size();}public ExpandableListView getExpandableListView() {AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, TreeViewAdapter.ItemHeight);ExpandableListView superTreeView = new ExpandableListView(parentContext);superTreeView.setLayoutParams(lp);return superTreeView;}/*** 三层树结构中的第二层是一个ExpandableListView*/    public View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {// 是 final ExpandableListView treeView = getExpandableListView();final TreeViewAdapter treeViewAdapter = new TreeViewAdapter(this.parentContext,0);List<TreeNode> tmp = treeViewAdapter.getTreeNode();//临时变量取得TreeViewAdapter的TreeNode集合，可为空final TreeNode treeNode=(TreeNode) getChild(groupPosition, childPosition);tmp.add(treeNode);treeViewAdapter.updateTreeNode(tmp);treeView.setAdapter(treeViewAdapter);//关键点：取得选中的二级树形菜单的父子节点,结果返回给外部回调函数treeView.setOnChildClickListener(this.stvClickEvent);/*** 关键点：第二级菜单展开时通过取得节点数来设置第三级菜单的大小*/treeView.setOnGroupExpandListener(new OnGroupExpandListener() {@Overridepublic void onGroupExpand(int groupPosition) {AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,(treeNode.childs.size()+1)*TreeViewAdapter.ItemHeight + 10);treeView.setLayoutParams(lp);}});/*** 第二级菜单回收时设置为标准Item大小*/treeView.setOnGroupCollapseListener(new OnGroupCollapseListener() {@Overridepublic void onGroupCollapse(int groupPosition) {AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,TreeViewAdapter.ItemHeight);treeView.setLayoutParams(lp);}});treeView.setPadding(TreeViewAdapter.PaddingLeft*2, 0, 0, 0);return treeView;}/*** 三级树结构中的首层是TextView,用于作为title*/public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {TextView textView = TreeViewAdapter.getTextView(this.parentContext);textView.setText(getGroup(groupPosition).toString());textView.setPadding(TreeViewAdapter.PaddingLeft*2, 0, 0, 0);return textView;}public long getChildId(int groupPosition, int childPosition) {return childPosition;}public Object getGroup(int groupPosition) {return superTreeNodes.get(groupPosition).parent;}public int getGroupCount() {return superTreeNodes.size();}public long getGroupId(int groupPosition) {return groupPosition;}public boolean isChildSelectable(int groupPosition, int childPosition) {return true;}public boolean hasStableIds() {return true;}
}

List<SuperTreeViewAdapter.SuperTreeNode> superNodeTree = superAdapter.GetTreeNode（）；for （int i = 0； i < parent.length； i++） {SuperTreeViewAdapter.SuperTreeNode superNode = new SuperTreeViewAdapter.SuperTreeNode（）；superNode.parent = parent[i]；for （int j = 0； j < child_grandchild.length； j++） {TreeViewAdapter.TreeNode node = new TreeViewAdapter.TreeNode（）；node.parent = child_grandchild[j][0][0]；for （int k = 0； k < child_grandchild[j][1].length； k++） {node.childs.add（child_grandchild[j][1][k]）；}superNode.childs.add（node）；}superNodeTree.add（superNode）；}        superAdapter.UpdateTreeNode（superNodeTree）；expandableListView.setAdapter（superAdapter）；

<LinearLayoutandroid:id="@+id/linearLayout1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_gravity="center"android:gravity="center" ><Buttonandroid:id="@+id/button1"android:layout_width="100dip"android:layout_height="wrap_content"android:text="二层结构" /><Buttonandroid:id="@+id/button2"android:layout_width="100dip"android:layout_height="wrap_content"android:text="三层结构" /></LinearLayout><ExpandableListViewandroid:id="@+id/expandablelistview"android:layout_width="fill_parent"android:layout_height="fill_parent"></ExpandableListView>