Android learning Experience (1)--pull parser

The Android kernel uses the pull parser so you don't have to import the jar package, the pull parser is simple, easy to use, close to hand-written XML files

Parse the XML file as Xmlpull.xml

　　

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <Students>3     <StudentID= "1">4         <name>Zhang mm</name>5         <Gender>Woman</Gender>6         < Age>18</ Age>7     </Student>8     <StudentID= "2">9         <name>Wang Gg</name>Ten         <Gender>Man</Gender> One         < Age>20</ Age> A     </Student> - </Students>

Entity class Student.java

1 Public class Student {2 private Integer ID;3 private String name;4 private String gender;5 private Integer age;6 Public Integer getId () {7 return ID;8     }9 Public void SetId (Integer id) {Ten this.id = ID; One     } A Public String GetName () { - return name; -     } the Public void SetName (String name) { - this.name = name; -     } - Public String Getgender () { + return gender; -     } + Public void Setgender (String gender) { A This.gender = gender; at     } - Public Integer Getage () { - return age; -     } - Public void Setage (Integer age) { - this.age = age; in     } -      to}

　

Parsing XML Read-write method Xmlservice.java

1 Package Com.bwl.service;2 3 import Java.io.InputStream;4 import java.util.ArrayList;5 import java.util.List;6 7 import Org.xmlpull.v1.XmlPullParser;8 import Org.xmlpull.v1.XmlSerializer;9 Ten import com.bwl.pojo.student; One  A import android.util.Xml; -  - Public class Xmlservice { the  -Public List<Student>Read (InputStream xml) throws Exception { -List<Student>list = null; - student student = null; + Xmlpullparser xmlpull = Xml.newpullparser (); - xmlpull.setinput (XML, "UTF-8");//Set parse value ("Path", "encoding") + int flag = Xmlpull.geteventtype ();//The event type that gets the data currently pointing to A Do { at switch (flag) { - Case xmlpullparser.start_document://XML document starting node start document - //Collection instantiation -List = new ArrayList<Student>(); - Break ; - Case xmlpullparser.start_tag://XML document start node parsing in if ((Xmlpull.getname ()). Equals ("Student")) {//and node contents are compared - int id = new Integer (xmlpull.getattributevalue (0));//Gets the first property value of a node to student = new Student (); + Student.setid (ID); -                 } the if ((Xmlpull.getname ()). Equals ("name")) { * String Name=xmlpull.nexttext ();//Gets the next text node of the node $ student.setname (name);Panax Notoginseng                 } - if ((Xmlpull.getname ()). Equals ("gender")) { the String Gender=xmlpull.nexttext (); + Student.setgender (gender); A                 } the if ((Xmlpull.getname ()). Equals ("Age")) { + int age=new Integer (Xmlpull.nexttext ()); - Student.setage (age); $                 } $ Break ; - Case xmlpullparser.end_tag://XML end node End document - if (Xmlpull.getname (). Equals ("Student")) {//node end judgment the List.add (student);//student added to the list collection - student = null;//student is emptyWuyi                 } the Break ; -             } Wu flag = Xmlpull.next ();//refers to the next node - } while (flag! = xmlpullparser.end_document); Execution to end document node documentation ends About xml.close (); $ return list; -     } -  -public void Write (List<Student>list) throws Exception { A XmlSerializer XmlSerializer = Xml.newserializer (); + if (list! = null) { the xmlserializer.startdocument ("UTF-8", true);//Add STATRT docunment event - Xmlserializer.starttag ("", "students");//Add nodes, parameters (namespaces, node names) if you don't use namespaces, you can use "" instead $ For (student student:list) { the Xmlserializer.setproperty ("", "student"); the Xmlserializer.attribute ("", "id", Student.getid (). toString ());//define Student Node Hu attribute parameter: (namespace, property name, property value) the Xmlserializer.setproperty ("", "name"); the Xmlserializer.text (Student.getname ()); - Xmlserializer.endtag ("", "student");//node end tag in Xmlserializer.setproperty ("", "gender"); the Xmlserializer.text (Student.getgender ()); the Xmlserializer.endtag ("", "gender"); About Xmlserializer.setproperty ("", "Age"); the Xmlserializer.text (Student.getage (). toString ()); the Xmlserializer.endtag ("", "Age"); the Xmlserializer.endtag ("", "student"); +             } - xmlserializer.enddocument ();//Add End document event the Bayi         } the     } the  -}

　　

Android learning Experience (1)--pull parser