Spinner的用法实现

界面上只有一个textview和一个spinner，实现下拉列表框。

spinner.xml：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 
 
    <TextView 
        android:id="@+id/textView" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginLeft="15dip" 
        android:layout_marginRight="15dip" 
        android:textSize="25dip" 
        /> 
 
    <Spinner 
        android:id="@+id/spinner" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" /> 
 
</LinearLayout> 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dip"
        android:layout_marginRight="15dip"
        android:textSize="25dip"
        />

    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

SpinnerTest.java：

package com.example.wenandroid; 
 
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 SpinnerTest extends Activity { 
private static final String m[]={"A型","B型","O型","AB型","其他"}; 
private TextView textview; 
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); 
        textview=(TextView)findViewById(R.id.textView); 
        spinner=(Spinner)findViewById(R.id.spinner); 
        adapter=new ArrayAdapter<String>(this, android.R.layout.易做图_spinner_item, m); 
        adapter.setDropDownViewResource(android.R.layout.易做图_spinner_dropdown_item); 
        spinner.setAdapter(adapter); 
        spinner.setOnItemSelectedListener(new OnItemSelectedListener() 
        { 
 
            @Override 
            public void onItemSelected(AdapterView<?> arg0, View arg1, 
                    int arg2, long arg3) { 
                // TODO Auto-generated method stub  
                textview.setText("您的血型是："+m[arg2]); 
            } 
 
            @Override 
            public void onNothingSelected(AdapterView<?> arg0) { 
                // TODO Auto-generated method stub  
                 
            } 
             
        }); 
         
    } 
 
} 

package com.example.wenandroid;

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 SpinnerTest extends Activity {
private static final String m[]={"A型","B型","O型","AB型","其他"};
private TextView textview;
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);
  textview=(TextView)findViewById(R.id.textView);
  spinner=(Spinner)findViewById(R.id.spinner);
  adapter=new ArrayAdapter<String>(this, android.R.layout.易做图_spinner_item, m);
  adapter.setDropDownViewResource(android.R.layout.易做图_spinner_dropdown_item);
  spinner.setAdapter(adapter);
  spinner.setOnItemSelectedListener(new OnItemSelectedListener()
  {

   @Override
   public void onItemSelected(AdapterView<?> arg0, View arg1,
     int arg2, long arg3) {
    // TODO Auto-generated method stub
    textview.setText("您的血型是："+m[arg2]);
   }

   @Override
   public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub
    
   }
   
  });
  
 }

}

运行结果如下：

补充：软件开发 , Java ,