Sax Parser android Example

XML parsing in android

Here is the simplest way to parse XML and displaying into list view accordingly.You just have to care about how many tag you want  from your XML. Accordingly create a XML and base adapter.Now work is finish.

If you want to use this common XML file in  more than one ListView with different design then only create switch case.

AndroidChennaiActivity.java

public class AndroidChennaiActivity extends Activity 
{
private CommonClassFunction ccF;
ParsingXml sm=new ParsingXml();
 private ArrayList<String> tagName=new ArrayList<String>();
private ListView list;private ProgressDialog pd;
 @Override
 public void onCreate(Bundle savedInstanceState
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  list=(ListView) findViewById(R.id.list);

  tagName.add("vSmallImageDetail");
  tagName.add("vDescriptionDetail");
  tagName.add("vDurationDetail");
  tagName.add("dAddedDateDetail");
  pd=ProgressDialog.show(this,"Please wait","Loading...");
  pd.setCancelable(false);
  
  String url="www.demo.com";
  ccF=sm.new CommonClassFunction(this,tagName,list,pd,url);
  ccF.start();
 }
}

Common class that will perform everything in background thread and will display data in ListView

ParsingXml.java

public class ParsingXml extends DefaultHandler
{
 private int length;
 private boolean Error=false,flag=false;
 private ListView listview;
 private ProgressDialog pd;


 private ArrayList<String> [] store; 
 private ArrayList<String> tagName=new ArrayList<String>();
 private Activity act;
public ParsingXml(ArrayList<String> tag,int len)
 {
length=len;store=new ArrayList[length];
tagName=tag;
for(int i=0;i<length;i++)
  {
store[i]=new ArrayList<String>();
}
}

@Override
public void characters(char[] ch, int start, int lengthh)throws SAXException 
 {
super.characters(ch, start, lengthh);
String str=new String(ch,start,lengthh);
str=str.trim();
if(flag)
  {
for(int i=0;i<length;i++)
   {
if(tagName.get(i).equalsIgnoreCase(local))
    {
store[i].add(str);
}
}
}
}
 String local="";
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException 
 {
super.endElement(uri, localName, qName);
for(int i=0;i<length;i++)
  {
if(tagName.get(i).equalsIgnoreCase(localName))
   {
flag=false;
}
}
}

@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException 
 {
  super.startElement(uri, localName, qName, attributes);
for(int i=0;i<length;i++)
  {
if(tagName.get(i).equalsIgnoreCase(localName))
   {
flag=true;local=localName;
}
}
}

 private String str;
public class CommonClassFunction extends Thread
 {
  public CommonClassFunction(Activity actt,ArrayList<String> tag,ListView list,
  ProgressDialog pdD,String url)
  {
act=actt;tagName=tag;listview=list;pd=pdD;str=url;
}
@Override
public void run() 
  {
try
   {
  length=tagName.size();
act.runOnUiThread(all);
}
catch(Exception e)
   {
e.getMessage();
}
}
}

private Runnable all=new Runnable() 
 {
public void run() 
  {
try
   {
SAXParserFactory sFactory=SAXParserFactory.newInstance();
SAXParser sParser=sFactory.newSAXParser();
XMLReader xmlReader=sParser.getXMLReader();
px=new ParsingXml(tagName,length);
xmlReader.setContentHandler(px);
URL url=new URL(str);
url.openConnection();
xmlReader.parse(new InputSource(url.openStream()));
}
  catch(Exception e)
  {
e.getMessage();Error=true;
}
handler.sendEmptyMessage(0);
}
};

ParsingXml px;
private Handler handler=new Handler()
{
@Override
public void handleMessage(Message msg) 
  {
super.handleMessage(msg);
try
   {
if(length==0)
    {
Error=true;
}
    else if(Error)
    {
length=0;
}
if(Error)
    {
length=0;
}
switch(length)
    {
case 1:
break;
case 2:
break;
case 3:
break;
case 4:
      DealsAdapter da=new DealsAdapter(act, px.store[0],px.store[1],px.store[2],px.store[3]);
   listview.setAdapter(da);
break;
case 5:
break;
case 0: 
     ShowDialogBox("Error has occurred unknown reason");
}
pd.dismiss();
}
  catch(Exception e)
  {
e.getMessage();
}
 }
};

private void ShowDialogBox(String msg)
{
Builder builder=new AlertDialog.Builder(act);
builder.setTitle("Alerting");
builder.setMessage(msg);
builder.setPositiveButton("Ok",new DialogInterface.OnClickListener() 
  {
public void onClick(DialogInterface dialog, int which) 
   {
dialog.dismiss();
}
});
builder.show();
}
}