Android解析XML文件到Spinner中

       解析XML文件一般使用XmlPullParserFactory方式进行解析：

 （1）需要解析的XML建立一个raw文件夹放入其中

 解析的代码如person.xml：

<?xml version = "1.0" encoding = "UTF-8"?>
<persons>
	<person id = "23">
		<name>张老师</name>
		<age>21</age>
	</person>
	<person id = "20">
		<name>李老师</name>
		<age>25</age>
	</person>
</persons>

（2）需要建立一个和属性相同的实体类person.java

public class Person {

	private String id;
	private String name;
	private int age;
	
	public Person() {
		// TODO Auto-generated constructor stub
	}

	public Person(String id, String name, int age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
	
	
	

}

（3）写一个XmlPullParserFactory的解析工具ParseTool.java：

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;


import android.content.Context;
import android.content.res.Resources;

import com.qianfeng.android1524_spinner3.R;
import com.qianfeng.android1524_spinner3.entity.Person;

public class ParseTool {
	
	private Context context;
	
	public ParseTool(Context context)
	{
		this.context = context;
	}

	public  List<Person> parse() throws XmlPullParserException, IOException
	{
		List<Person> list = null;
		Person person = null;
		
		XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
		XmlPullParser parser = factory.newPullParser();
		
		//获取被解析的xml文件的读取流
		Resources res = context.getResources();
		InputStream inputStream = res.openRawResource(R.raw.person);
		
		parser.setInput(inputStream,"utf-8");
		
		int event  = parser.getEventType();
		while(event!=XmlPullParser.END_DOCUMENT)
		{
			switch(event)
			{
			case XmlPullParser.START_DOCUMENT:
				list = new ArrayList<Person>();
				break;
			case XmlPullParser.START_TAG:
				String tagName = parser.getName();
				if("person".equals(tagName))
				{
					person = new Person();
					int count = parser.getAttributeCount();
					for(int i=0;i<count;i++)
					{
						String attrName = parser.getAttributeName(i);
						String attrValue = parser.getAttributeValue(i);
						if("id".equals(attrName))
							person.setId(attrValue);
					}
				}
				else if("name".equals(tagName))
					person.setName(parser.nextText());
				else if("age".equals(tagName))
					person.setAge(Integer.parseInt(parser.nextText()));
				break;
			case XmlPullParser.END_TAG:
				if("person".equals(parser.getName()))
				{
					list.add(person);
				}
				break;
			}
			event = parser.next();
		}
		return list;
	}

}

（4）在Activity_main.xml中添加spinner组件：

<RelativeLayout 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=".MainActivity" >

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

</RelativeLayout>

（5）最后在MainActivity中得到解析data并且使用ArrayAdapter进行适配：

package com.qianfeng.android1524_spinner3;

import java.io.IOException;
import java.util.List;

import org.xmlpull.v1.XmlPullParserException;

import com.qianfeng.android1524_spinner3.entity.Person;
import com.qianfeng.android1524_spinner3.tool.ParseTool;

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.Toast;
import android.app.Activity;

public class MainActivity extends Activity {

	private Spinner spinner;
	private List<Person> list;

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

		spinner = (Spinner) findViewById(R.id.spinner);

		ParseTool tool = new ParseTool(this);

		try {
			list = tool.parse();
		} catch (XmlPullParserException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		//适配器是调用集合中每个对象的toString()方法，把toString()方法的返回值作为数据项来显示
		ArrayAdapter<Person> adapter = new ArrayAdapter<Person>(this,
				android.R.layout.simple_list_item_1, list);
		
		spinner.setAdapter(adapter);
		
		spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

			@Override
			public void onItemSelected(AdapterView<?> parent, View view,
					int position, long id) {
				
				Person ren = list.get(position);
				Toast.makeText(MainActivity.this, ren.getName(), Toast.LENGTH_SHORT).show();
			}

			@Override
			public void onNothingSelected(AdapterView<?> parent) {
				
				
			}
		});

	}

}

   最后启动模拟器运行后就可以看到效果了！