📅  最后修改于: 2020-10-10 01:14:23             🧑  作者: Mango
Android提供了使用SAX,DOM等解析器解析xml文件的功能。 SAX解析器不能用于创建XML文件,而只能用于解析xml文件。
它比DOM消耗更少的内存。
从面板上拖动一个textview。现在,activity_main.xml文件将如下所示:
在项目的资产目录内创建一个名为file.xml的xml文件。
Sachin Kumar
50000
Rahul Kumar
60000
John Mike
70000
现在,编写代码以使用sax解析器解析xml。
package com.javatpoint.saxxmlparsing;
import java.io.InputStream;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView tv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv=(TextView)findViewById(R.id.textView1);
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler() {
boolean name = false;
boolean salary = false;
public void startElement(String uri, String localName,String qName,
Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase("name"))
{
name = true;
}
if (qName.equalsIgnoreCase("salary"))
{
salary = true;
}
}//end of startElement method
public void endElement(String uri, String localName,
String qName) throws SAXException {
}
public void characters(char ch[], int start, int length) throws SAXException {
if (name) {
tv.setText(tv.getText()+"\n\n Name : " + new String(ch, start, length));
name = false;
}
if (salary) {
tv.setText(tv.getText()+"\n Salary : " + new String(ch, start, length));
salary = false;
}
}//end of characters
method
};//end of DefaultHandler object
InputStream is = getAssets().open("file.xml");
saxParser.parse(is, handler);
} catch (Exception e) {e.printStackTrace();}
}
}