列表选择框spinner

MainActivity.java

package com.xwy.a;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Spinner;
import android.widget.Toast;
import android.os.Build;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.fragment_main);

		final Spinner spinner = (Spinner) findViewById(R.id.spinner1);
		/****************通过指定适配器的方式为选择列表框指定列表项********************/
//		方法一
//		String[] ctype=new String[]{"身份证","学生证","军人证"};
//		ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,ctype);
//		方法二
//		ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
//				this, R.array.ctype,android.R.layout.simple_dropdown_item_1line);	//创建一个适配器
//		
//		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // 为适配器设置列表框下拉时的选项样式
//		spinner.setAdapter(adapter); // 将适配器与选择列表框关联
		
		/***************************************************************************/		
		// 为选择列表框添加OnItemSelectedListener事件监听
		spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
			public void onItemSelected(AdapterView<?> parent, View arg1,
					int pos, long id) {
				String result = parent.getItemAtPosition(pos).toString(); // 获取选择项的值
				Log.i("Spinner示例", result);
			}

			public void onNothingSelected(AdapterView<?> arg0) {
			}
		});
		Button button = (Button) findViewById(R.id.button1);
		button.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				Toast.makeText(MainActivity.this,
						"您选择的证件类型是：" + spinner.getSelectedItem().toString(),
						Toast.LENGTH_SHORT).show();

			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	/**
	 * A placeholder fragment containing a simple view.
	 */
	public static class PlaceholderFragment extends Fragment {

		public PlaceholderFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main, container,
					false);
			return rootView;
		}
	}

}

fragment_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.xwy.a.MainActivity$PlaceholderFragment"
    android:orientation="vertical" >

    <TextView 
        android:id="@+id/textView1"
        android:text="请选择证件类型"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <Spinner 
        android:entries="@array/ctype"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:id="@+id/spinner1"/>
    <Button 
        android:text="提交"
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

arrays.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="ctype">
        <item>身份证</item>
        <item>学生证</item>
        <item>军人证</item>
        <item>工作证</item>
        <item>其他</item>
    </string-array>
</resources>