Using pull to generate and parse XML files

There are many ways to parse XML, which can be parsed with dom,sax, but the most commonly used on Android is pull parsing, and here's a simple example

<?xmlversion= "1.0" encoding= "UTF-8"?><persons>  <person id= "Up" >  <name>allen</ name>  <age>36</age>  </person>  <person id= >  <name>james< /name>  <age>25</age>  </person></persons>

JavaBean class

public class Person {private Integer id;private String name;private short age;public Integer getId () {return ID;} public void SetId (Integer id) {this.id = ID;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;} public short getage () {return age;} public void Setage {this.age = age;}}

Generating an XML file

public static String WriteXML (list<person> persons, writer writer) {XmlSerializer    Serializer = Xml.newserializer ();        try {serializer.setoutput (writer);        Serializer.startdocument ("UTF-8", true);        The first parameter is a namespace, and if you do not use a namespace, you can set it to null Serializer.starttag ("", "persons");            for (person person:persons) {Serializer.starttag ("", "person");            Serializer.attribute ("", "id", Person.getid (). toString ());            Serializer.starttag ("", "name");            Serializer.text (Person.getname ());            Serializer.endtag ("", "name");            Serializer.starttag ("", "Age");            Serializer.text (Person.getage (). toString ());            Serializer.endtag ("", "Age");        Serializer.endtag ("", "person");        } serializer.endtag ("", "persons");        Serializer.enddocument ();    return writer.tostring ();    } catch (Exception e) {e.printstacktrace (); } return null;} 
 

Parsing XML files

public static list<person> ReadXML (InputStream instream) {xmlpullparser parser = Xml.newpullparser (); try { Parser.setinput (instream, "UTF-8"); int eventtype = Parser.geteventtype (); person Currentperson = null; list<person> persons = Null;while (EventType! = xmlpullparser.end_document) {switch (eventtype) {case xmlpullparser.start_document://Document Start event, data initialization can be processed persons = new arraylist<person> (); break;case xmlpullparser.start_tag://Start element Event String name = Parser.getname (); if (Name.equalsignorecase ("person")) {Currentperson = New person (); Currentperson.setid (New Integer (Parser.getattributevalue (NULL, "id"));} else if (Currentperson! = null) {if (Name.equalsignorecase ("name")) {Currentperson.setname (Parser.nexttext ());// If it is followed by a text node, it returns its value} else if (Name.equalsignorecase ("Age")) {Currentperson.setage (New short (Parser.nexttext ()));}} Break;case xmlpullparser.end_tag://End Element Event if (Parser.getname (). Equalsignorecase ("person") && Currentperson! = null) {Persons.add (Currentperson); currentperson = null;} break;} EventType = Parser.next ();} Instream.close (); return persons;} catch (Exception e) {e.printstacktrace ();} return null;}

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Using pull to generate and parse XML files