ListView框架的集成

第一步:

 1 public abstract class DefaultAdapter<T> extends BaseAdapter
 2 {
 3
 4     protected List<T> list;
 5
 6     public DefaultAdapter(List<T> list)
 7     {
 8
 9         this.list = list;
10     }
11
12     @Override
13     public int getCount()
14     {
15         // TODO Auto-generated method stub
16         return list.size();
17     }
18
19     @Override
20     public Object getItem(int position)
21     {
22         // TODO Auto-generated method stub
23         return list.get(position);
24     }
25
26     @Override
27     public long getItemId(int position)
28     {
29         // TODO Auto-generated method stub
30         return position;
31     }
32
33     public abstract BaseHolder<T> getHolder();
34
35     @Override
36     public View getView(int position, View convertView, ViewGroup parent)
37     {
38         // TODO Auto-generated method stub
39 //        View view = null;
40         BaseHolder<T> holder = null;
41
42         if (convertView == null)
43         {
44
45 //            view = View.inflate(MyApplication.getContext(), R.layout.item_city, null);
46             holder = getHolder();
47
48 //            holder.tv1 = (TextView) view.findViewById(R.id.tv1);
49 //            holder.tv2 = (TextView) view.findViewById(R.id.tv2);
50
51 //            view.setTag(holder);
52
53             convertView = holder.getView();
54
55         }
56
57
58         holder = (BaseHolder<T>) convertView.getTag();
59         holder.initData(list, position);
60 //        City city = list.get(position);
61 //        holder.tv1.setText(city.getName());
62 //        holder.tv2.setText(city.getPerson());
63
64         return convertView;
65     }
66
67 }

第二步:

 1 public abstract class BaseHolder<T>
 2 {
 3
 4     protected View view = null;
 5
 6     public BaseHolder()
 7     {
 8
 9         initView();
10     }
11
12     public View getView()
13     {
14         return view;
15     }
16
17
18     public abstract void initData(List<T> list, int position);
19
20     public abstract void initView();
21 }

第三步:

 1 public class StudentAdapter extends DefaultAdapter
 2 {
 3     public StudentAdapter(List list)
 4     {
 5         super(list);
 6     }
 7
 8     @Override
 9     public BaseHolder getHolder()
10     {
11         return new ViewHolder();
12     }
13
14     private class ViewHolder extends BaseHolder
15     {
16         private TextView tvName, tvAge;
17
18         @Override
19         public void initData(List list, int position)
20         {
21              Student student= (Student) list.get(position);
22             tvName.setText(student.getName());
23             tvAge.setText(String.valueOf(student.getAge()));
24
25         }
26
27         @Override
28         public void initView()
29         {
30             view = View.inflate(MyApplication.getAppContext(), R.layout.item_student_listview, null);
31             tvName = (TextView) view.findViewById(R.id.tv_student_listview_name);
32             tvAge= (TextView) view.findViewById(R.id.tv_student_listview_age);
33             view.setTag(this);
34         }
35     }
36 }