The method of DOM parsing XML file of Android development _android

The examples in this article describe the way DOM parses XML files in Android. Share to everyone for your reference, specific as follows:

Write an XML file in a assets file

<?xml version= "1.0" encoding= "UTF-8"?> 
<persons> 
 <person id= "A" > 
  <name> liming </name> 
  <age>30</age> 
 </person> 
 <person id= "A" > 
  <name> Li Xiangmei </name> 
  <age>25</age> 
 </person> 
</persons>

Second, write a DOM parsing operation in the service

Package com.example.service; 
Import Java.io.InputStream; 
Import java.util.ArrayList; 
Import java.util.List; 
Import Javax.xml.parsers.DocumentBuilder; 
Import Javax.xml.parsers.DocumentBuilderFactory; 
Import org.w3c.dom.Document; 
Import org.w3c.dom.Element; 
Import Org.w3c.dom.Node; 
Import org.w3c.dom.NodeList; 
Import Com.example.domain.Person; public class Xmldomservice {public list<person> parsexml (InputStream is) {list<person> List = new Array 
  List<person> ();
  Create Dom factory object Documentbuilderfactory factory = Documentbuilderfactory.newinstance (); 
   try {//Documentbuilder object Documentbuilder Builder = Factory.newdocumentbuilder (); 
   Get Document Object documents = Builder.parse (IS); 
   Gets the root Element root = Document.getdocumentelement () of the Document object; 
   Gets all the person node objects in the persons root node nodelist personnodes = root.getelementsbytagname ("person"); Iterate through all the person nodes for (int i = 0; i < personnodes.getlength (); i++) {person PErson = new Person (); Gets the Node object Element Personnode = (Element) personnodes.item (i) corresponding to the index according to item (index);
    The specific person node//set id attribute value Person.setid (Integer.parseint (Personnode.getattribute ("id")); 
    Gets all the byte points below the node nodelist personchildnodes = Personnode.getchildnodes (); Iterate through the byte point for the person for (int index = 0; index < personchildnodes.getlength (); index++) {//Get child nodes node nod 
     E = Personchildnodes.item (index); Determines whether node nodes are element nodes if (node.getnodetype () = = Node.element_node) {//Convert nodes to element node elements = (Elem 
      ENT) node; 
         Determines whether the element node is a name element node if ("Name". Equals (Element.getnodename ()) {Person.setname () (Element.getfirstchild ()) 
      . Getnodevalue ()); else if ("Age". Equals (Element.getnodename ())) {//Determine if the Age node person.setage (new short Element.getfirstchild ().
      NodeValue ())); 
   Add the Person object to the collection list.add (person); 
  //Close the input stream is.close (); }catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); 
 } return list;

 } 
}

Third, show actions in activity

Package com.example.lession03_xml;
Import Java.io.InputStream;
Import java.util.List;
Import Javax.xml.parsers.SAXParser;
Import Javax.xml.parsers.SAXParserFactory;
Import Com.example.domain.Person;
Import Com.example.service.XMLContentHandler;
Import Com.example.service.XMLDomService;
Import Android.os.Bundle;
Import android.app.Activity;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import android.view.inputmethod.InputBinding;
Import Android.widget.Button;
Import Android.widget.Toast; public class Xmlactivityextends the activity {//Declares the component public Button btn_sax,btn_dom,btn_pull, public xmldomservice Xmldomserv
Ice
@Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);//Set the view displayed
Setcontentview (R.layout.activity_xml);
Xmldomservice=new Xmldomservice ();
Gets the component btn_sax= (Button) Findviewbyid (R.id.btn_sax) based on the ID;
Btn_dom= (Button) Findviewbyid (r.id.btn_dom);
Btn_pull= (Button) Findviewbyid (r.id.btn_pull); //Register Event Btn_sax.setonclicklistener for button (new Myonclicklistener ());
Btn_dom.setonclicklistener (New Myonclicklistener ());
Btn_pull.setonclicklistener (New Myonclicklistener ()); @Override public boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu, this adds the items to the action bar if it I
s present.
Getmenuinflater (). Inflate (R.menu.xml, menu);
return true; }//Anonymous class class Myonclicklistener implements onclicklistener{@Override public void OnClick (View v) {int id=v.getid (); Swit
CH (ID) {Case r.id.btn_sax:toast.maketext (xmlactivity.this, "Parse with sax", Toast.length_long). Show (); try{//sax resolved Factory objects
SAXParserFactory factory=saxparserfactory.newinstance ();
Get SAX parser SAXParser Saxparser=factory.newsaxparser ();
Create handler Object Xmlcontenthandler handlerservice=new Xmlcontenthandler ();
InputStream is=getassets (). Open ("Csdn.xml");
Direct parsing Saxparser.parse (is, handlerservice);
Gets Toast.maketext (xmlactivity.this, "----" +handlerservice, Toast.length_long) through the Handlerservice object. Show (); }catch (Exception e) {E. Printstacktrace ();
} break;
Case R.id.btn_dom:inputstream Is=null; try{//Gets the input stream object that reads the file Is=getassets (). Open ("Csdn.xml");//using DOM to parse list<person> Persons=xmldomservice.parsexml (is
);
Simple test//toast.maketext (Xmlactivity.this, "" +persons.get (0). GetName (), Toast.length_long). Show ();
Toast.maketext (Xmlactivity.this, "Parse with Dom" +persons.get (0). GetName (), Toast.length_long). Show ();
}catch (Exception e) {e.printstacktrace ();} break;
Case R.id.btn_pull:toast.maketext (xmlactivity.this, "Use pull resolution", Toast.length_long). Show ();
Break
Default:break;

 }
}
}
}

I hope this article will help you with your Android programming.