读取与解析XML数据
language.xml数据一定要在assets文件中
<?xml version="1.0" encoding="utf-8"?>
<Languages>
<lan id="1">
<name>Java</name>
<ide>eclipse</ide>
</lan>
<lan id="2">
<name>swift</name>
<ide>xcode</ide>
</lan>
<lan id="3">
<name>C#</name>
<ide>visual Studio</ide>
</lan>
</Languages>
MainActivity.java
<span style="font-size:14px;">package com.example.xmltest;
import java.io.IOException;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView text;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text=(TextView) findViewById(R.id.tv);
try {
DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder build=builderFactory.newDocumentBuilder();
/*Document document=build.parse(getAssets().open("language.xml"));//这部分注释的代码是读取assets文件里的xml数据
Element element=document.getDocumentElement(); //获取根元素
NodeList list= element.getElementsByTagName("lan");//获取跟结点
for(int i=0;i<list.getLength();i++){
Element lan= (Element) list.item(i); //获取xml中第一条数据
text.append(lan.getAttribute("id")+"\n");
text.append(lan.getElementsByTagName("name").item(0).getTextContent()+"\n");
text.append(lan.getElementsByTagName("ide").item(0).getTextContent()+"\n");
}*/
//下面这部分创建xmL数据
Document newxml=build.newDocument();
Element languages=newxml.createElement("Languages");
languages.setAttribute("cat","it"); //创建跟结点
Element lan1=newxml.createElement("lan");
lan1.setAttribute("id","1");
Element name1=newxml.createElement("name");
name1.setTextContent("Java");
Element ide1=newxml.createElement("ide");
ide1.setTextContent("Eclipse");
lan1.appendChild(name1);
lan1.appendChild(ide1);
languages.appendChild(lan1);
Element lan2=newxml.createElement("lan");
lan2.setAttribute("id","2");
Element name2=newxml.createElement("name");
name2.setTextContent("Swift");
Element ide2=newxml.createElement("ide");
ide2.setTextContent("C#");
lan2.appendChild(name2);
lan2.appendChild(ide2);
languages.appendChild(lan2);
newxml.appendChild(languages);
TransformerFactory transformerFactory=TransformerFactory.newInstance();
Transformer transformer=transformerFactory.newTransformer();
transformer.setOutputProperty("encoding","utf-8");
StringWriter sw=new StringWriter();//创建一个输出流
transformer.transform(new DOMSource(newxml),new StreamResult(sw));
text.setText(sw.toString());//编写完xml后，输出太页面上
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main,menu);
return true;
}
}
</span>
activity_main.xml<span style="font-size:14px;"><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" >
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="140dp"
android:textSize="20dp" />
</RelativeLayout></span>
