Simple use of XML format data in Android

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 PackageCom.wangzhu.demo;Importjava.io.IOException;ImportJava.io.StringWriter;ImportJavax.xml.parsers.DocumentBuilder;Importjavax.xml.parsers.DocumentBuilderFactory;Importjavax.xml.parsers.ParserConfigurationException;ImportJavax.xml.transform.OutputKeys;ImportJavax.xml.transform.Transformer;Importjavax.xml.transform.TransformerConfigurationException;Importjavax.xml.transform.TransformerException;Importjavax.xml.transform.TransformerFactory;ImportJavax.xml.transform.dom.DOMSource;ImportJavax.xml.transform.stream.StreamResult;Importorg.w3c.dom.Document;Importorg.w3c.dom.Element;Importorg.w3c.dom.NodeList;Importorg.xml.sax.SAXException;ImportAndroid.content.Context;/*** XML, Extensible Markup Language (extensible Markup Language),<br/> * A subset of the standard generic markup language, a markup language for marking electronic files to make them structured. <br/> * It can be used to tag data, define data types, and is a source language that allows users to define their own markup language. <br/> * It is ideal for world Wide Web transport, providing a unified approach to describing and exchanging institutional data independent of the application or vendor. <br/> * Features:<br/> * XML is a markup language, much like html<br/> * XML is designed to transmit data rather than display data <br/> * XML tags are not predefined, You need to define your own tags <br/> * XML is designed to be self-descriptive <br/> * XML is the recommended standard for the:<br/> <br/> * * Compared to HTML * XML is not an alternative to HTML. <br/> * XML and HTML designed for different purposes:<br/> * XML is designed to transmit and store data with the focus on the content of the data. <br/> * HTML is designed to display data with the focus on the appearance of the data. <br/> * HTML is designed to display information, while XML is designed to transmit information. <br/> * * XML Syntax rules:<br/> * in XML, it is illegal to omit the close tag, and all elements must have a close tag. <br/> * XML tag is case sensitive <br/> * XML must be properly nested <br/> * XML document must have root element <br/> * XML attribute value must be quoted <br/> * The XML hollow lattice is retained <br/> * * Use the Android platform's own API to load the XML data and parse all the data according to the structure of the XML <br/> * * Using the Android platform's own API to create XML-compliant data, and output the XML data. <br/> * *@authorWangzhu * @date November 15, 2014 PM 11:38:10*/ Public classXmlutils {Privatecontext Context;  PublicXmlutils (Context context) { This. Context =context; }    /*** Read XML file*/     Public voidReadXML () {StringBuilder Accum=NewStringBuilder (); Try{documentbuilderfactory builderfactory=documentbuilderfactory. newinstance (); Documentbuilder Builder=Builderfactory.newdocumentbuilder (); Document Document=Builder.parse (Context.getassets (). Open ("Languages.xml")); //Get languages TagsElement element =document.getdocumentelement (); Accum.append ("cat="). Append (Element.getattribute ("Cat")). Append (","); NodeList List= Element.getelementsbytagname ("LAN");  for(inti = 0; I < list.getlength (); i++) {                //get each LAN labelElement LAN =(Element) List.item (i); Accum.append ("Id="). Append (Lan.getattribute ("id")). Append (","); Accum.append ("Ide="). Append (Lan.getelementsbytagname ("IDE"). Item (0). Gettextcontent ()). Append (","); Accum.append ("Name="). Append (Lan.getelementsbytagname ("Name"). Item (0). Gettextcontent ()). Append (";"); } System.err.println ("READXML:" +Accum); } Catch(parserconfigurationexception e) {e.printstacktrace (); } Catch(saxexception e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }    }    /*** Create an XML file*/     Public voidCreatexml () {Try{documentbuilderfactory builderfactory=documentbuilderfactory. newinstance (); Documentbuilder Builder=Builderfactory.newdocumentbuilder (); //Create a Document objectDocument document =builder.newdocument (); //creating a root elementElement languages = document.createelement ("Languages"); Languages.setattribute ("Cat", "it"); //create the first child element using a Document objectElement lan1 = document.createelement ("LAN"); Lan1.setattribute ("id", "1"); Element name1= Document.createelement ("name"); Name1.settextcontent ("Java"); //Adding child elementsLan1.appendchild (name1); Element Ide1= Document.createelement ("IDE"); Ide1.settextcontent ("Eclipse"); //Adding child elementsLan1.appendchild (IDE1); //adding to the root elementLanguages.appendchild (LAN1); //create the first child element using a Document objectElement lan2 = document.createelement ("LAN"); Lan2.setattribute ("id", "2"); Element name2= Document.createelement ("name"); Name2.settextcontent ("Swift"); //Adding child elementsLan2.appendchild (name2); Element Ide2= Document.createelement ("IDE"); Ide2.settextcontent ("Xcode"); //Adding child elementsLan2.appendchild (IDE2); //adding to the root elementLanguages.appendchild (lan2); //create the first child element using a Document objectElement lan3 = document.createelement ("LAN"); Lan3.setattribute ("id", "3"); Element Name3= Document.createelement ("name"); Name3.settextcontent ("C #"); //Adding child elementsLan3.appendchild (Name3); Element Ide3= Document.createelement ("IDE"); Ide3.settextcontent ("Visual Studio"); //Adding child elementsLan3.appendchild (IDE3); //adding to the root elementLanguages.appendchild (LAN3); //adding languages as a root element to a documentDocument.appendchild (languages); //ConversionsTransformerfactory transformerfactory =transformerfactory. newinstance (); Transformer Transformer=Transformerfactory.newtransformer (); Transformer.setoutputproperty (outputkeys.encoding,"Utf-8"); StringWriter SW=NewStringWriter (); Transformer. Transform (NewDomsource (document),NewStreamresult (SW)); System.err.println ("Createxml:" +sw.tostring ()); } Catch(parserconfigurationexception e) {e.printstacktrace (); } Catch(transformerconfigurationexception e) {e.printstacktrace (); } Catch(transformerexception e) {e.printstacktrace (); }    }}

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Simple use of XML format data in Android