Android中ListView的使用步骤

1  <ListView
2         android:id="@+id/lv"
3         android:layout_width="fill_parent"     //注意宽度和高度必须为 fill_parent
4         android:layout_height="fill_parent" >
5 </ListView>

ListView lv = (ListView) findViewById(R.id.lv);

lv.setAdapter(new MyBaseAdapter());

 1 private class MyAdapter extends BaseAdapter{
 2 
 3         @Override
 4         public int getCount() {   //getCount-------用来指定到底有多少个条目
 5             return list.size();
 6         }
 7         
 8         @Override
 9         public View getView(int position, View convertView, ViewGroup parent) { //GetView------- 用来 显示 具体的条目的内容

10             System.out.println("..."+position);
11             TextView tv;
12             
13             StudentBean bean = list.get(position);
14             
15             //listview的优化
16             if(convertView!=null){
17                 tv = (TextView) convertView;
18             }else{
19                 tv = new TextView(MainActivity.this);
20             }
21             
22             tv.setText(bean+"");
23             
24             return tv;
25         }
26 
27         @Override
28         public Object getItem(int position) {
29             // TODO Auto-generated method stub
30             return null;
31         }
32 
33         @Override
34         public long getItemId(int position) {
35             // TODO Auto-generated method stub
36             return 0;
37         }
38         
39     }