Android Simple XML parsing

Create a Assets folder in Android project first App/src/main/assets

Add a file named Data.xml here and edit the file to include the following XML format:

<?XML version= "1.0" encoding= "Utf-8"?><Apps>    <app>        <ID>1</ID>        <name>Google Maps</name>        <version>1.0</version>    </app>    <app>        <ID>2</ID>        <name>Chrome</name>        <version>2.1</version>    </app>    <app>        <ID>3</ID>        <name>Google Play</name>        <version>2.3</version>    </app></Apps>

============== get the content in XML ================

@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Try {            //gets the input stream of the XML fileInputStream FIS = getresources (). Getassets (). Open ("Data.xml"); InputStreamReader ISR=NewInputStreamReader (FIS, "UTF-8"); StringBuffer StringBuffer=NewStringBuffer (); intMark =-1;  while(Mark = Isr.read ())! =-1) {stringbuffer.append (Char) mark); } String Data=stringbuffer.tostring (); //to pass the entire file content as a string//parsexmlwithpull (data); //parsexmlwithsax (data);        } Catch(IOException e) {e.printstacktrace (); }    }

==============pull parsing mode =================

Get Parse tool Xmlpullparser:
Xmlpullparserfactory factory = Xmlpullparserfactory.newinstance ();
Xmlpullparser Xmlpullparser = Factory.newpullparser ();

Incoming XML character stream:
Xmlpullparser.setinput (new StringReader (XmlData));

Processing according to the node characteristics:
Switch (Xmlpullparser.geteventtype ())

    Private voidparsexmlwithpull (String xmlData) {Try{xmlpullparserfactory Factory=xmlpullparserfactory.newinstance (); Xmlpullparser Xmlpullparser=Factory.newpullparser (); Xmlpullparser.setinput (NewStringReader (xmlData)); intEventType =Xmlpullparser.geteventtype (); String ID= ""; String name= ""; String version= "";  while(EventType! =xmlpullparser.end_document) {String NodeName=Xmlpullparser.getname (); Switch(eventtype) {//start parsing a node                     CaseXmlpullparser.start_tag: {if("id". Equals (NodeName)) {ID=Xmlpullparser.nexttext (); } Else if("Name". Equals (NodeName)) {Name=Xmlpullparser.nexttext (); } Else if("Version". Equals (NodeName)) {Version=Xmlpullparser.nexttext (); }                    }                     Break; //finish parsing a node                     CaseXmlpullparser.end_tag: {if("App". Equals (NodeName)) {LOG.D ("Woider", "ID is" +ID); LOG.D ("Woider", "name is" +name); LOG.D ("Woider", "version is" +version); }                    }                     Break; } EventType=Xmlpullparser.next (); }        } Catch(Exception e) {e.printstacktrace (); }    }

Parsexmlwithpull

==============sax parsing mode =================

Using sax parsing typically requires creating a class that inherits DefaultHandler and overrides the five methods of the parent class

Startdocument (): Called when XML parsing is started

Startelement (): Called when parsing a node is started

Characters (): Gets the contents of the node when called

EndElement (): Called when parsing a node is complete

Enddocument (): Called when the entire XML parsing is complete

 Public classContentHandlerextendsDefaultHandler {PrivateString NodeName; PrivateStringBuilder ID; PrivateStringBuilder name; PrivateStringBuilder version; @Override Public voidStartdocument ()throwssaxexception {ID=NewStringBuilder (); Name=NewStringBuilder (); Version=NewStringBuilder (); } @Override Public voidstartelement (String uri, String localname, String qName, Attributes Attributes)throwssaxexception {//remember the current node nameNodeName =LocalName; } @Override Public voidCharacters (Char[] ch,intStartintLengththrowssaxexception {//to format normalizationString str =NewString (CH, start, length). Trim (); //add content based on the current node name        if("id". Equals (NodeName))        {id.append (str); } Else if("Name". Equals (NodeName))        {name.append (str); } Else if("Version". Equals (NodeName))        {version.append (str); }} @Override Public voidEndElement (String uri, String localname, String qName)throwssaxexception {if("App". Equals (LocalName)) {LOG.D ("Woider", "ID is" +ID); LOG.D ("Woider", "name is" +name); LOG.D ("Woider", "version is" +version); //empty StringBuilderId.setlength (0); Name.setlength (0); Version.setlength (0); }} @Override Public voidEnddocument ()throwssaxexception {}}

ContentHandler

Get Parse tool XmlReader:
SAXParserFactory factory = Saxparserfactory.newinstance ();
XMLReader XMLReader = Factory.newsaxparser (). Getxmlreader ();

Incoming rule to parse tool:
ContentHandler handler = new ContentHandler ();
Xmlreader.setcontenthandler (handler);

To begin the parse execution:
Xmlreader.parse (New InputSource (new StringReader (XmlData)));

    Private voidParsexmlwithsax (String xmlData) {Try{SAXParserFactory Factory=saxparserfactory.newinstance (); XMLReader XMLReader=Factory.newsaxparser (). Getxmlreader (); ContentHandler Handler=NewContentHandler (); //to set an instance of ContentHandler to XmlReaderXmlreader.setcontenthandler (handler); //Start Execution parsingXmlreader.parse (NewInputSource (NewStringReader (xmlData)); } Catch(Exception e) {e.printstacktrace (); }    }

Parsexmlwithsax

Method Two (directly for InputStream parsing)

Get Parse tool SAXParser:
SAXParserFactory factory = Saxparserfactory.newinstance ();
SAXParser parser = Factory.newsaxparser ();

Get rules and input streams:
Handler = new Parserhandler ();
InputStream InputStream = Getresources (). Getassets (). Open ("Data.xml");

Simultaneous incoming start parsing:
Parser.parse (InputStream, handler);

Finally print the LogCat in the log, data.xml resolution is completed

In addition to pull parsing and SAX parsing, there is also a DOM parsing that is important.

There are also XML parsing tools, such as JDOM and dom4j, that simplify the parsing process and improve the efficiency of parsing.

Android Simple XML parsing