然后再MainActivity中只需改一个地方：
readBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
InputStream is = getAssets().open("books.xml");
// parser = new SaxBookParser();
parser = new DomBookParser();
books = parser.parse(is);
for (Book book : books) {
Log.i(TAG, book.toString());
}
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
);
执行结果是一样的。
使用PULL解析器：
PullBookParser.java代码如下：
package com.scott.xml.parser;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;
import android.util.Xml;
import com.scott.xml.model.Book;
public class PullBookParser implements BookParser {
@Override
public List<Book> parse(InputStream is) throws Exception {
List<Book> books = null;
Book book = null;
// XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
// XmlPullParser parser = factory.newPullParser();
XmlPullParser parser = Xml.newPullParser(); //由android.util.Xml创建一个XmlPullParser实例
parser.setInput(is, "UTF-8"); //设置输入流 并指明编码方式
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
switch (eventType) {
case XmlPullParser.START_DOCUMENT:
books = new ArrayList<Book>();
break;
case XmlPullParser.START_TAG:
if (parser.getName().equals("book")) {
book = new Book();
} else if (parser.getName().equals("id")) {
eventType = parser.next();
book.setId(Integer.parseInt(parser.getText()));
} else if (parser.getName().equals("name")) {
eventType = parser.next();
book.setName(parser.getText());
} else if (parser.getName().equals("price")) {
eventType = parser.next();
book.setPrice(Float.parseFloat(parser.getText()));
}
break;
case XmlPullParser.END_TAG:
if (parser.getName().equals("book")) {
books.add(book);
book = null;
}
break;
}
eventType = parser.next();
}
return books;
}
@Override
public String serialize(List<Book> books) throws Exception {
// XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
// XmlSerializer serializer = factory.newSerializer();
XmlSerializer serializer = Xml.newSerializer(); //由android.util.Xml创建一个XmlSerializer实例
StringWriter writer = new StringWriter();
serializer.setOutput(writer); //设置输出方向为writer
serializer.startDocument("UTF-8", true);
serializer.startTag("", "books");
for (Book book : books) {
serializer.startTag("", "book");
serializer.attribute("", "id", book.getId() + "");
serializer.startTag("", "name");
serializer.text(book.getName());
serializer.endTag("", "name");
serializer.startTag("", "price");
serializer.text(book.getPrice() + "");
serializer.endTag("", "price");
serializer.endTag("", "book");
}
serializer.endTag("", "books");
serializer.endDocument();
return writer.toString();
}
}
