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 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 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;

}

效果图：

完整代码下载地址

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。