Spinner控件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical"
  >
  <TextView android:id="@+id/spinnerText"
  			android:layout_width="fill_parent" 
  			android:layout_height="wrap_content"></TextView>
  <Spinner android:id="@+id/Spinner01" 
           android:layout_width="fill_parent"
           android:layout_height="wrap_content"></Spinner>
</LinearLayout>

package com.example.spinner;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
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 MainActivity extends Activity {

    	private static final String[] m={"A型","B型","O型","AB型","其餘"};
    	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.activity_main);
    		
    		view = (TextView) findViewById(R.id.spinnerText);
    		spinner = (Spinner) findViewById(R.id.Spinner01);
    		//將可選內容與ArrayAdapter鏈接起來
    		adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);
    		
    		//設置下拉列表的風格
    		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    		
    		//將adapter 添加到spinner中
    		spinner.setAdapter(adapter);
    		
    		//添加事件Spinner事件監聽  
    		spinner.setOnItemSelectedListener(new SpinnerSelectedListener());
    		
    		//設置默認值
    		spinner.setVisibility(View.VISIBLE);
    		
    	}
    	
    	//使用數組形式操做
    	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) {
    		}
    	}

}