Android学习笔记之控件Spinner

1.mian.xml布局文件

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6
 7     <TextView
 8         android:id="@+id/textView1"
 9         android:layout_width="match_parent"
10         android:layout_height="wrap_content"
11         android:text="你输入的是阿森纳"
12         android:textSize="20sp"/>
13
14     <Spinner
15         android:id="@+id/spinner1"
16         android:layout_marginTop="10dp"
17         android:layout_width="match_parent"
18         android:layout_height="wrap_content"/>
19
20
21 </LinearLayout>

2.item.xml样式布局文件

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="horizontal" >
 6
 7     <ImageView
 8         android:id="@+id/imageView1"
 9         android:layout_width="60dp"
10         android:layout_height="60dp"
11         android:src="@drawable/a"/>
12
13     <TextView
14         android:id="@+id/textView2"
15         android:layout_width="match_parent"
16         android:layout_height="60dp"
17         android:text="阿森纳"
18         android:textSize="20sp"
19         android:gravity="center"/>
20
21
22 </LinearLayout>

3.java代码

 1 public class MainActivity extends Activity  {
 2
 3     private TextView tv1;
 4     private Spinner s1;
 5     private List<Map<String,Object>> dataList;
 6     private SimpleAdapter sa;
 7     private int[] pic = {R.drawable.a,R.drawable.l,R.drawable.m,R.drawable.q};
 8     private String[] name = {"阿森纳","利物浦","曼联","切尔西"};
 9
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.main);
14
15         tv1 = (TextView) findViewById(R.id.textView1);
16         s1 = (Spinner) findViewById(R.id.spinner1);
17
18         dataList = new ArrayList<Map<String,Object>>();
19
20         //新建适配器
21         sa = new SimpleAdapter(this, getData(), R.layout.item, new String[]{"pic","name"}, new int[]{R.id.imageView1,R.id.textView2});
22
23         //设置一个下拉的样式表
24         sa.setDropDownViewResource(R.layout.item);
25         s1.setAdapter(sa);
26
27         //s1设置监听器
28         s1.setOnItemSelectedListener(new OnItemSelectedListener() {
29
30             @Override
31             public void onItemSelected(AdapterView<?> parent, View view,
32                     int position, long id) {
33                 // TODO Auto-generated method stub
34                 String team = sa.getItem(position).toString();
35                 tv1.setText("你输入的是"+team);
36             }
37
38             @Override
39             public void onNothingSelected(AdapterView<?> parent) {
40                 // TODO Auto-generated method stub
41
42             }
43         });
44     }
45     //设置数据源
46     private List<Map<String,Object>> getData(){
47         for(int i = 0;i<pic.length;i++){
48             Map<String, Object> map = new HashMap<String, Object>();
49             map.put("pic",pic[i]);
50             map.put("name", name[i]);
51             dataList.add(map);
52         }
53         return dataList;
54     }
55
56 }