How To Get Data Using Sax Parsing In Android
Can any body show how to get the data from xml document using SAX parsing for below XML example. xyz
Solution 1:
There are lots of SAX Tutorial and answers available. Here is one of the good answers on StackOverflow that explains a clean chit how SAX Parser works!!!
Solution 2:
public class JaappApplication extends Application {
public static final int FAIL = 0;
public static final int SUCCESS = 1;
//XML parsers
public static final int QUESTIONS = 0;
//PUTEXTRAS
public static final String SUBJECTID = "subjectid";
public static String subtypeid;
public static String subtypeoption;
}
public static ArrayList<QuestionsDto> getQuestionsDtos(String quesid)
{
ArrayList<QuestionsDto> arr = new ArrayList<QuestionsDto>();
String url1 = url + "getquestions.php?subjectid=" + quesid;
XMLParser xmlParser = new XMLParser(JaappApplication.QUESTIONS);
int x = xmlParser.parseXml(url1, JaappApplication.QUESTIONS);
arr = xmlParser.getQuestions();
return arr;
}
package com.jaapp.xmlparsing;
import java.io.InputStream;
import java.net.URI;
import java.net.UnknownHostException;
import java.util.ArrayList;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import com.jaapp.application.JaappApplication;
import com.jaapp.dto.QuestionsDto;
import android.util.Log;
public class XMLParser {
protected static final String TAG = XMLParser.class.getCanonicalName();
private static QuestionsReader questionHandler;
public XMLParser(int initHandler) {
if (initHandler == JaappApplication.QUESTIONS) {
questionHandler = new QuestionsReader();
}
}
public int parseXml(String parseString, int type) {
try {
/* Create a URL we want to load some xml-data from. */
URI lUri = new URI(parseString);
// Prepares the request.
HttpClient lHttpClient = new DefaultHttpClient();
HttpGet lHttpGet = new HttpGet();
lHttpGet.setURI(lUri);
// Sends the request and read the response
HttpResponse lHttpResponse = lHttpClient.execute(lHttpGet);
InputStream lInputStream = lHttpResponse.getEntity().getContent();
int status = lHttpResponse.getStatusLine().getStatusCode();
/* Get a SAXParser from the SAXPArserFactory. */
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
SAXParser sp = spf.newSAXParser();
/* Get the XMLReader of the SAXParser we created. */
XMLReader xr = sp.getXMLReader();
if(type == JaappApplication.QUESTIONS) {
xr.setContentHandler(questionHandler);
}
/* Create a new ContentHandler and apply it to the XML-Reader */
/* Parse the xml-data from our URL. */
if (!((status >= 200) && (status < 300))) {
}
else
{
InputSource is = new InputSource(lInputStream);
is.setEncoding("ISO-8859-1");
xr.parse(is);
}
/* Parsing has finished. */
return JaappApplication.SUCCESS;
}
catch(UnknownHostException e)
{
Log.e(TAG, e.toString());
return JaappApplication.FAIL;
}
catch (Exception e) {
/* Display any Error to the GUI:. */
Log.e(TAG, e.toString());
return JaappApplication.FAIL;
}
}
public int parseXml(InputStream is, int type) {
try {
/* Get a SAXParser from the SAXPArserFactory. */
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
SAXParser sp = spf.newSAXParser();
/* Get the XMLReader of the SAXParser we created. */
XMLReader xr = sp.getXMLReader();
if(type == JaappApplication.QUESTIONS) {
xr.setContentHandler(questionHandler);
// } else if(type == NRTApplication.BOTTOMAD) {
// xr.setContentHandler(myBottomAdHandler);
}
/* Create a new ContentHandler and apply it to the XML-Reader */
/* Parse the xml-data from our URL. */
InputSource is1 = new InputSource(is);
is1.setEncoding("ISO-8859-1");
xr.parse(is1);
/* Parsing has finished. */
return JaappApplication.SUCCESS;
}
catch(UnknownHostException e)
{
Log.e(TAG, e.toString());
return JaappApplication.FAIL;
}
catch (Exception e) {
/* Display any Error to the GUI:. */
Log.e(TAG, "Exception XML parser: " + e.toString());
return JaappApplication.FAIL;
}
}
public ArrayList<QuestionsDto> getQuestions() {
return questionHandler.getQuestions();
}
}
package com.jaapp.xmlparsing;
import java.util.ArrayList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import android.util.Log;
import com.jaapp.dto.QuestionsDto;
public class QuestionsReader extends DefaultHandler {
private static final String TAG = QuestionsReader.class.getCanonicalName();
private String tempVal;
private ArrayList<QuestionsDto> completeQuestionsList;
private QuestionsDto tempQues;
public QuestionsReader() {
completeQuestionsList = new ArrayList<QuestionsDto>();
}
@Override
public void startDocument() throws SAXException {
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if (localName.equalsIgnoreCase("question")) {
tempQues = new QuestionsDto();
}
tempVal = "";
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
tempVal += new String(ch, start, length);
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (localName.equalsIgnoreCase("question")) {
completeQuestionsList.add(tempQues);
} else if(localName.equalsIgnoreCase("id")) {
tempQues.setQid(tempVal);
} else if(localName.equalsIgnoreCase("level")) {
tempQues.setQlevel(Integer.parseInt(tempVal));
} else if(localName.equalsIgnoreCase("description")) {
tempQues.setQquestion(tempVal);
}
}
public ArrayList<QuestionsDto> getQuestions() {
return completeQuestionsList;
}
}
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