Android中ExpandableListView的使用

1. //ExpandableListView的Adapter   
2. public  class  ExpandableAdapter extends  BaseExpandableListAdapter  
3. {  
4.     Activity activity;  
5.       
6.     public  ExpandableAdapter(Activity a)  
7.     {  
8.         activity = a;  
9.     }  
10.     public  Object getChild(int  groupPosition, int  childPosition)  
11.     {  
12.         return  childArray.get(groupPosition).get(childPosition);  
13.     }  
14.     public  long  getChildId(int  groupPosition, int  childPosition)  
15.     {  
16.         return  childPosition;  
17.     }  
18.     public  int  getChildrenCount(int  groupPosition)  
19.     {  
20.         return  childArray.get(groupPosition).size();  
21.     }  
22.     public  View getChildView(int  groupPosition, int  childPosition,  
23.             boolean  isLastChild, View convertView, ViewGroup parent)  
24.     {  
25.         String string = childArray.get(groupPosition).get(childPosition);  
26.         return  getGenericView(string);  
27.     }  
28.     // group method stub   
29.     public  Object getGroup(int  groupPosition)  
30.     {  
31.         return  groupArray.get(groupPosition);  
32.     }  
33.     public  int  getGroupCount()  
34.     {  
35.         return  groupArray.size();  
36.     }  
37.     public  long  getGroupId(int  groupPosition)  
38.     {  
39.         return  groupPosition;  
40.     }  
41.     public  View getGroupView(int  groupPosition, boolean  isExpanded,  
42.             View convertView, ViewGroup parent)  
43.     {  
44.         String string = groupArray.get(groupPosition);  
45.         return  getGenericView(string);  
46.     }  
47.     // View stub to create Group/Children 's View   
48.     public  TextView getGenericView(String string)  
49.     {  
50.         // Layout parameters for the ExpandableListView   
51.         AbsListView.LayoutParams layoutParams = new  AbsListView.LayoutParams(  
52.                 ViewGroup.LayoutParams.FILL_PARENT, 64 );  
53.         TextView text = new  TextView(activity);  
54.         text.setLayoutParams(layoutParams);  
55.         // Center the text vertically   
56.         text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);  
57.         // Set the text starting position   
58.         text.setPadding(36 , 0 , 0 , 0 );  
59.         text.setText(string);  
60.         return  text;  
61.     }  
62.     public  boolean  hasStableIds()  
63.     {  
64.         return  false ;  
65.     }  
66.     public  boolean  isChildSelectable(int  groupPosition, int  childPosition)  
67.     {  
68.         return  true ;  
69.     }  
70. }