转载自http://www.cnblogs.com/nuliniaoboke/archive/2012/11/13/2767957.html
二层列表是直接用androidAPI中的ExpandableListView即可实现，三层列表其实是对二层列表的一个嵌套，实现起来会相对繁琐。
部分代码：
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() {
@Override
public 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() {
@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());
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;
}
}
SuperTreeViewAdapter.javaSuperTreeViewAdapter.java
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）； ExpandableListViewActivity.java
ExpandableListViewActivity.java
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center" > <Button
android:id="@+id/button1"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:text="二层结构" /> <Button
android:id="@+id/button2"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:text="三层结构" />
</LinearLayout> <ExpandableListView
android:id="@+id/expandablelistview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
</ExpandableListView> main.xml
main.xml
效果图 ：
二层列表
三层列表