android实现菜单三级树效果

Z时代
2024-01-10
分类：IT

本文实例为大家分享了android实现菜单三级树展示的具体代码，供大家参考，具体内容如下

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;
 }