在上篇博客里，介绍了如何读取assets目录下的txt文件。在这里，介绍如何读取xml文件。
xml文件内容如下：
<?xml version="1.0" encoding="UTF-8"?> <books> <book id="001"> <title>Harry Potter</title> <price>￥35.00</price> </book> <book id="002"> <title>Learning XML</title> <price>￥66.00</price> </book> <book id="003"> <title>Thinking in Java</title> <price>￥1.00</price> </book> <book id="004"> <title>Useful Android</title> <price>￥1.50</price> </book> </books>
根据xml文件，接下来定义一个Book类，有id, title, price三个属性。
然后使用一个子线程，通过AssetManager读取到数据流，再使用XmlPullParser解析xml文件。
完整示例代码如下：
package com.li.readassetfile;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 android.app.Activity;import android.content.res.AssetManager;import android.content.res.XmlResourceParser;import android.os.Bundle;import android.os.Handler;import android.util.Xml;import android.widget.TextView;public class ReadXmlActivity extends Activity {private TextView tvContent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_read_xml);tvContent = (TextView) findViewById(R.id.tvContent);new Handler().post(new Runnable() {@Overridepublic void run() {AssetManager manager = getResources().getAssets();List<Book> books = null; Book book = null;try {InputStream inputStream = manager.open("book.xml"); XmlPullParser parser = Xml.newPullParser(); parser.setInput(inputStream, "UTF-8"); StringBuilder sb = new StringBuilder();try {while(parser.getEventType() != XmlPullParser.END_DOCUMENT){if(parser.getEventType() == XmlPullParser.START_DOCUMENT){books = new ArrayList<ReadXmlActivity.Book>();}else if(parser.getEventType() == XmlPullParser.START_TAG){if("book".equals(parser.getName())){book = new Book();book.setId(parser.getAttributeValue(0));}if(book!=null){ if("title".equals(parser.getName())){//判断开始标签元素是否是name book.setTitle(parser.nextText()); }else if("price".equals(parser.getName())){//判断开始标签元素是否是price book.setPrice(parser.nextText()); } } }else if(parser.getEventType() == XmlPullParser.END_TAG){if("book".equals(parser.getName())){//判断结束标签元素是否是book books.add(book);//将book添加到books集合 book = null; } }parser.next();}if(books != null && books.size() > 0){for(int i = 0; i < books.size(); i ++){sb.append(books.get(i).getId() + "\b\b");sb.append(books.get(i).getTitle() + "\b\b");sb.append(books.get(i).getPrice() + "\b\b");sb.append("\n");}}inputStream.close();tvContent.setText(sb.toString());} catch (XmlPullParserException e) {e.printStackTrace();}} catch (IOException | XmlPullParserException e) {e.printStackTrace();}}});}private class Book{private String id;private String title;private String price;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}}}
使用完，要注意关闭数据流。为了防止ANR，所以这里使用子线程来读取xml文件。
