android實現菜單三級樹效果

這篇文章主要爲大家詳細介紹了android實現菜單三級樹效果，具有一定的參考價值，感興趣的小夥伴們可以參考一下

本文實例爲大家分享了android實現菜單三級樹展示的具體代碼，供大家參考，具體內容如下

以下是部分代碼，完整代碼請在最下面點擊下載：

【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");
 // 一級菜單名數組
 parent = MenuCatName.split("/");
 // 二級菜單名數組
 child = MenuGroupName.split("/");
 // 三級菜單名數組
 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);
 // 去掉子菜單分割線
 superTreeView.setDivider(null);
 return superTreeView;
 }
 
 /**
 * 三層樹結構中的第二層是一個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);
 // 臨時變量取得TreeViewAdapter的TreeNode集合，可爲空
 List<TreeNode> tmp = treeViewAdapter.getTreeNode();
 final TreeNode treeNode = (TreeNode) getChild(groupPosition,
  childPosition);
 tmp.add(treeNode);
 treeViewAdapter.updateTreeNode(tmp);
 treeView.setAdapter(treeViewAdapter);
 
 // 取得選中的二級樹形菜單的父子節點,結果返回給外部回調函數
 treeView.setOnChildClickListener(this.stvClickEvent);
 
 /**
  * 第二級菜單展開時通過取得節點數來設置第三級菜單的大小
  */
 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);
  }
 });
 
 /**
  * 第二級菜單回收時設置爲標準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;
 }
 
 /**
 * 三級樹結構中的首層是TextView,用於作爲title
 */
 public View getGroupView(int groupPosition, boolean isExpanded,
  View convertView, ViewGroup parent) {
 TextView textView = TreeViewAdapter.getTextView(this.parentContext);
 textView.setText(getGroup(groupPosition).toString());
 // 設置首層menu標題背景
 textView.setBackgroundResource(R.drawable.menu_category);
 textView.setPadding(TreeViewAdapter.PaddingLeft * 2, 0, 0, 0);
 
 return textView;
 }

效果圖：

完整代碼下載地址

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持神馬文庫。