在android里用ExpandableListView实现二层和三层列表

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.java

SuperTreeViewAdapter.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