学步园

• 一、使用数组作为数据源

1. 在layout布局文件：声明一个TextView控件和一个Spinner控件，代码如下

     <Spinner android:id="@+id/Spinner01"   
              android:layout_width="fill_parent"  
              android:layout_height="wrap_content"></Spinner>  

2. 在Activity文件加入以下代码

   import android.app.Activity;  
   import android.os.Bundle;  
   import android.view.View;  
   import android.widget.AdapterView;  
   import android.widget.AdapterView.OnItemSelectedListener;  
   import android.widget.ArrayAdapter;  
   import android.widget.Spinner;  
   import android.widget.TextView;  
     
   public class SpinnerActivity extends Activity {  
         
       private static final String[] m={"A型","B型","O型","AB型","其他"};  
       private TextView view ;  
       private Spinner spinner;  
       private ArrayAdapter<String> adapter;  
       @Override  
       protected void onCreate(Bundle savedInstanceState) {  
           // TODO Auto-generated method stub  
           super.onCreate(savedInstanceState);  
           setContentView(R.layout.spinner);  
             
           view = (TextView) findViewById(R.id.spinnerText);  
           spinner = (Spinner) findViewById(R.id.Spinner01);  
           //将可选内容与ArrayAdapter连接起来  
           adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);  
             
           //设置下拉列表的风格  
           adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
             
           //将adapter 添加到spinner中  
           spinner.setAdapter(adapter);  
             
           //添加事件Spinner事件监听    
           spinner.setOnItemSelectedListener(new SpinnerSelectedListener());  
             
           //设置默认值  
           spinner.setVisibility(View.VISIBLE);  
             
       }  
         
       //使用数组形式操作  
       class SpinnerSelectedListener implements OnItemSelectedListener{  
     
           public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,  
                   long arg3) {  
               view.setText("你的血型是："+m[arg2]);  
           }  
     
           public void onNothingSelected(AdapterView<?> arg0) {  
           }  
       }  
   }  

• 二、使用XML作为数据源 
  
  1. 在values文件夹下新建一个arryas.xml文件：代码如下

     <?xml version="1.0" encoding="utf-8"?>  
     <resources>  
         <string-array name="plantes">  
             <item>NOKIA</item>  
             <item>MOTO</item>  
             <item>HTC</item>  
             <item>LG</item>  
             <item>其他</item>  
         </string-array>  
     </resources>  

  2. 　在Activity文件加入以下代码

     import android.app.Activity;  
     import android.os.Bundle;  
     import android.view.View;  
     import android.widget.AdapterView;  
     import android.widget.AdapterView.OnItemSelectedListener;  
     import android.widget.ArrayAdapter;  
     import android.widget.Spinner;  
     import android.widget.TextView;  
       
     public class SpinnerActivity extends Activity {  
           
         private TextView view2;  
         private Spinner spinner2;  
         private ArrayAdapter adapter2;  
       
         @Override  
         protected void onCreate(Bundle savedInstanceState) {  
             // TODO Auto-generated method stub  
             super.onCreate(savedInstanceState);  
             setContentView(R.layout.spinner);  
       
             spinner2 = (Spinner) findViewById(R.id.spinner02);  
             view2 = (TextView) findViewById(R.id.spinnerText02);  
       
             //将可选内容与ArrayAdapter连接起来  
             adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item);  
       
             //设置下拉列表的风格   
      adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
       
             //将adapter2 添加到spinner中  
             spinner2.setAdapter(adapter2);  
       
             //添加事件Spinner事件监听    
             spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());  
       
             //设置默认值  
             spinner2.setVisibility(View.VISIBLE);  
               
         }  
           
         //使用XML形式操作  
         class SpinnerXMLSelectedListener implements OnItemSelectedListener{  
             public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,  
                     long arg3) {  
                 view2.setText("你使用什么样的手机："+adapter2.getItem(arg2));  
             }  
       
             public void onNothingSelected(AdapterView<?> arg0) {  
                   
             }  
               
         }  
     }