作者:平凡小几 | 来源:互联网 | 2023-05-19 03:48
这篇文章给大家介绍Android开发中解析xml的方法有哪些,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
第一步:新建一个Android工程,命名为XmlDemo
第二步:修改main.xml布局文件,代码如下:
<&#63;xmlversion="1.0"encoding="utf-8"&#63;>
第三步:修改主核心程序XmlDemo.Java,代码如下:
package com.tutor.xml;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlSerializer;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class XmlDemo extendsActivity implementsOnClickListener {
privatestatic final String BOOKS_PATH = "/sdcard/books.xml";
privateButton mButton1, mButton2, mButton3;
privateTextView mTextView;
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupViews();
}
// 初始化工作
privatevoid setupViews() {
mTextView = (TextView) findViewById(R.id.result);
mButton1 = (Button) findViewById(R.id.btn1);
mButton2 = (Button) findViewById(R.id.btn2);
mButton3 = (Button) findViewById(R.id.btn3);
mButton1.setOnClickListener(this);
mButton2.setOnClickListener(this);
mButton3.setOnClickListener(this);
}
// 创建xml文件
privatevoid createXmlFile() {
File linceseFile =new File(BOOKS_PATH);
try{
linceseFile.createNewFile();
}catch (IOException e) {
Log.e("IOException","exception in createNewFile() method");
}
FileOutputStream fileos =null;
try{
fileos =new FileOutputStream(linceseFile);
}catch (FileNotFoundException e) {
Log.e("FileNotFoundException","can&#39;t create FileOutputStream");
}
XmlSerializer serializer = Xml.newSerializer();
try{
serializer.setOutput(fileos,"UTF-8");
serializer.startDocument(null,true);
serializer.startTag(null,"books");
for(int i = 0; i <3; i++) {
serializer.startTag(null,"book");
serializer.startTag(null,"bookname");
serializer.text("Android教程"+ i);
serializer.endTag(null,"bookname");
serializer.startTag(null,"bookauthor");
serializer.text("Frankie"+ i);
serializer.endTag(null,"bookauthor");
serializer.endTag(null,"book");
}
serializer.endTag(null,"books");
serializer.endDocument();
serializer.flush();
fileos.close();
}catch (Exception e) {
Log.e("Exception","error occurred while creating xml file");
}
Toast.makeText(getApplicationContext(),"创建xml文件成功!",
Toast.LENGTH_SHORT).show();
}
// dom解析xml文件
privatevoid domParseXML() {
File file =new File(BOOKS_PATH);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db =null;
try{
db = dbf.newDocumentBuilder();
}catch (ParserConfigurationException e) {
e.printStackTrace();
}
Document doc =null;
try{
doc = db.parse(file);
}catch (SAXException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
Element root = doc.getDocumentElement();
NodeList books = root.getElementsByTagName("book");
String res ="本结果是通过dom解析:" +"/n";
for(int i = 0; i
第四步:由于我们在Sd卡上新建了文件,需要增加权限,如下代码(第13行):
<&#63;xmlversion="1.0"encoding="utf-8"&#63;>
第五步:运行上述工程,查看效果:
启动首界面:
点击创建XML文件按钮,生成books.xml文件
books.xml内容如下:
<&#63;xmlversion=&#39;1.0&#39;encoding=&#39;UTF-8&#39;standalOne=&#39;yes&#39;&#63;>
Android教程0
Frankie0
Android教程1
Frankie1
Android教程2
Frankie2
点击DOM解析XML按钮:
点击XmlPullParse解析XML按钮:
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