Parsing XML with Android and Java -


i have parse xml https://i.imgur.com/guahb4t.jpg extract highlighted string under "detailpageurl" tag. did try have quite confused ideas. i'm working on android sdk

import android.os.asynctask;  import org.w3c.dom.document; import org.w3c.dom.element; import org.w3c.dom.nodelist; import org.xml.sax.saxexception;  import java.io.ioexception; import java.net.malformedurlexception; import java.net.url;  import javax.xml.parsers.documentbuilder; import javax.xml.parsers.documentbuilderfactory; import javax.xml.parsers.parserconfigurationexception;   public class reflinkfetcher extends asynctask<string, void, string> {  string reflink = null;  @override protected string doinbackground( string... url){     document doc = openxml(url[0]);     element rootelement = doc.getdocumentelement();     reflink = getstring("detailpageurl", rootelement);     return reflink; }   public string getreflink(){     return reflink; }  private document openxml(string url) {     document doc = null;     try {         documentbuilderfactory dbf = documentbuilderfactory.newinstance();         documentbuilder db = dbf.newdocumentbuilder();         doc = db.parse(new url(url).openstream());     } catch (saxexception e1) {         e1.printstacktrace();     } catch (parserconfigurationexception e1) {         e1.printstacktrace();     } catch (malformedurlexception e2) {         e2.printstacktrace();     } catch (ioexception e3) {         e3.printstacktrace();     }     return doc; }  private string getstring(string tagname, element element) {     nodelist list = element.getelementsbytagname("items");     if (list != null && list.getlength() > 0) {         nodelist sublist = list.item(0).getchildnodes(); //0=items         if (sublist != null && sublist.getlength() > 0) {             sublist = sublist.item(4).getchildnodes(); //4=item             if( sublist != null && sublist.getlength() >0 ) {                 sublist = sublist.item(2).getchildnodes(); //2=detailpageurl                 if( sublist != null && sublist.getlength() >0 ) {                     return sublist.item(0).getnodevalue(); // value??                 }              }         }     }     return null; }  }

the final return null being executed. think "getstring" method quite poor too. how can improve it?

check nice open source library, need nice xml parser.


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