android 下拉选择框Spinner

建立Spinner的适配器

[java] view plain copy

1. public class SpinnerAdapter extends BaseAdapter{  
2.   
3.     private Context mContext;  
4.     private Map<String, String> ports;  
5.     private List<String> keys = new ArrayList<String>();  
6.     public SpinnerAdapter(Context _mContext,Map<String, String> _ports)  
7.     {  
8.         mContext = _mContext;  
9.         ports = _ports;       
10.         for (String str : _ports.keySet()) {// 遍历set去出里面的的Key  
11.             keys.add(str);  
12.         }  
13.     }  
14.       
15.     @Override  
16.     public int getCount() {  
17.         // TODO Auto-generated method stub  
18.         return keys.size();  
19.     }  
20.   
21.     @Override  
22.     public Object getItem(int position) { //一般是得到key,id用于后台交互  
23.         // TODO Auto-generated method stub  
24.         return keys.get(position);  
25.     }  
26.   
27.     @Override  
28.     public long getItemId(int position) {  
29.         // TODO Auto-generated method stub  
30.         return position;  
31.     }  
32.   
33.     @Override  
34.     public View getView(int position, View convertView, ViewGroup parent) {  
35.                   
36.         LayoutInflater _LayoutInflater=LayoutInflater.from(mContext);  
37.         convertView=_LayoutInflater.inflate(R.layout.tran_spinner_item, null);  
38.         if(convertView!=null)  
39.         {  
40.             TextView _TextView1=(TextView)convertView.findViewById(R.id.ports_name);  
41.             TextView _TextView2=(TextView)convertView.findViewById(R.id.ports_id);  
42.             _TextView1.setText(ports.get(keys.get(position)));  
43.             _TextView2.setText(keys.get(position));  
44.         }  
45.         return convertView;  
46.     }     
47.       
48.     /** 
49.      * 根据值, 设置spinner默认选中: 
50.      * @param spinner 
51.      * @param value 
52.      */  
53.     public static void setSpinnerItemSelectedByValue(Spinner spinner,String value){  
54.         SpinnerAdapter apsAdapter= (SpinnerAdapter) spinner.getAdapter(); //得到SpinnerAdapter对象  
55.         int k= apsAdapter.getCount();  
56.         for(int i=0;i<k;i++){  
57.             if(value.equals(apsAdapter.getItemValue(i))){  
58.                 spinner.setSelection(i,true);// 默认选中项  
59.                 break;  
60.             }  
61.         }  
62.     }   
63.       
64.     public String getItemValue(int position)  
65.     {  
66.         return ports.get(keys.get(position));  
67.     }  
68. }  

tran_spinner_item  layout

[java] view plain copy

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/ports_name"  
9.             android:layout_width="wrap_content"  
10.             android:layout_height="match_parent"  
11.             android:textSize="20sp" />  
12.     <TextView  
13.             android:id="@+id/ports_id"  
14.             android:layout_width="wrap_content"  
15.             android:layout_height="match_parent"  
16.             android:visibility="gone"/>  
17. </LinearLayout>  

生成spinner

[java] view plain copy

1. private void createSpinner(Activity _mActivity,TableRow tr,TableItemNameValueShrink tt)  
2.     {  
3.         TableRow.LayoutParams trlpfe = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,  
4.                 TableRow.LayoutParams.WRAP_CONTENT);  
5.         trlpfe.setMargins(0, 9, 0, 0);  
6.         Spinner sp = new Spinner(_mActivity);  
7.         sp.setLayoutParams(trlpfe);  
8.                   
9.         SpinnerAdapter _MyAdapter=new SpinnerAdapter(_mActivity, portsmap);  
10.         //绑定Adapter  
11.         sp.setAdapter(_MyAdapter);  
12.         SpinnerAdapter.setSpinnerItemSelectedByValue(sp,tt.value.toString());  
13.         tr.addView(sp);   
14.     }  

http://www.open-open.com/lib/view/open1330651497624.html

http://blog.csdn.net/ailiandeziwei/article/details/9164219

http://www.oschina.net/question/54100_33274  

选中默认值

[java] view plain copy

1. public static void setSpinnerItemSelectedByValue(Spinner spinner,String value){  
2.         SpinnerAdapter apsAdapter= (SpinnerAdapter) spinner.getAdapter(); //得到SpinnerAdapter对象  
3.         int k= apsAdapter.getCount();  
4.         for(int i=0;i<k;i++){  
5.             if(value.equals(apsAdapter.getItemValue(i))){  
6.                 spinner.setSelection(i,true);// 默认选中项  
7.                 break;  
8.             }  
9.         }  
10.     }   
11.       
12.     public String getItemValue(int position)  
13.     {  
14.         return ports.get(keys.get(position));  
15.     }  

http://www.cnblogs.com/over140/archive/2010/09/25/1834469.html

http://bbs.csdn.net/topics/390597226