学步园

以下是部分代码，完整代码请在最下面点击下载：

【MainActivity】

public void treeOnClick() {
		// TODO Auto-generated method stub
		superAdapter.RemoveAll();
		superAdapter.notifyDataSetChanged();
		String MenuCatName = getDate("MenuCatName");
		String MenuGroupName = getDate("MenuGroupName");
		String MenuItemName = getDate("MenuItemName");
		// 一级菜单名数组
		parent = MenuCatName.split("/");
		// 二级菜单名数组
		child = MenuGroupName.split("/");
		// 三级菜单名数组
		grandchild = MenuItemName.split("/");

		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);

	}

【SuperTreeViewAdapter】

public ExpandableListView getExpandableListView() {
		AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
				ViewGroup.LayoutParams.FILL_PARENT, TreeViewAdapter.ItemHeight);
		ExpandableListView superTreeView = new ExpandableListView(parentContext);
		superTreeView.setLayoutParams(lp);
		// 去掉子菜单分割线
		superTreeView.setDivider(null);
		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);
		// 临时变量取得TreeViewAdapter的TreeNode集合，可为空
		List<TreeNode> tmp = treeViewAdapter.getTreeNode();
		final TreeNode treeNode = (TreeNode) getChild(groupPosition,
				childPosition);
		tmp.add(treeNode);
		treeViewAdapter.updateTreeNode(tmp);
		treeView.setAdapter(treeViewAdapter);

		// 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);

		/**
		 * 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() {
			@Override
			public void onGroupExpand(int groupPosition) {

				AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
						ViewGroup.LayoutParams.FILL_PARENT, (treeNode.childs
								.size() + 1) * TreeViewAdapter.ItemHeight + 0);
				treeView.setLayoutParams(lp);
			}
		});

		/**
		 * 第二级菜单回收时设置为标准Item大小
		 */
		treeView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
			@Override
			public 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());
		// 设置首层menu标题背景
		textView.setBackgroundResource(R.drawable.menu_category);
		textView.setPadding(TreeViewAdapter.PaddingLeft * 2, 0, 0, 0);

		return textView;
	}

完整代码下载地址