java - I am trying to parse an XML file, but I am having some trouble fixing the errors I am receiving -
i have been trying figure out how figure out how can solve errors receiving while trying parse xml file.
this mainactivity.java file:
package com.example.android; import java.io.ioexception; import java.io.stringreader; import java.io.unsupportedencodingexception; import javax.xml.parsers.documentbuilder; import javax.xml.parsers.documentbuilderfactory; import javax.xml.parsers.parserconfigurationexception; import org.apache.http.httpentity; import org.apache.http.httpresponse; import org.apache.http.client.clientprotocolexception; import org.apache.http.client.methods.httppost; import org.apache.http.impl.client.defaulthttpclient; import org.apache.http.util.entityutils; import org.w3c.dom.document; import org.w3c.dom.node; import org.w3c.dom.nodelist; import org.xml.sax.inputsource; import org.xml.sax.saxexception; import org.xmlpull.v1.xmlpullparser; import android.r.string; import android.app.activity; import android.os.bundle; import android.renderscript.element; import android.util.log; import android.view.menu; import android.view.window; import android.view.animation.animation; import android.view.animation.animationutils; import android.widget.imageview; import android.widget.textview; public class mainactivity extends activity { string playerid, playerpd, playertype, xml; defaulthttpclient httpclient; httppost httppost; httpresponse httpresponse; httpentity httpentity; document doc; documentbuilderfactory dbf; documentbuilder db; inputsource inputsource; nodelist n, nl; node child; xmlpullparser parser; static final string url = ".xml url witheld"; static final string players = "players"; //parent node static final string player_pd = "playerpd"; static final string player_type = "playertype"; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); //remove title bar this.requestwindowfeature(window.feature_no_title); } } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.main, menu); return true; } public string getxmlfromurl(string url){ xml = null; try{ //defaulthttpclient httpclient = new defaulthttpclient(); httppost = new httppost (url); httpresponse = httpclient.execute(httppost); httpentity = httpresponse.getentity(); xml = entityutils.tostring(httpentity); } catch (unsupportedencodingexception e) { e.printstacktrace(); } catch (clientprotocolexception e) { e.printstacktrace(); } catch (ioexception e){ e.printstacktrace(); } //return xml return xml; } public document getdomelement(string xml){ doc = null; dbf = documentbuilderfactory.newinstance(); try{ db = dbf.newdocumentbuilder(); inputsource = new inputsource(); inputsource.setcharacterstream(new stringreader (xml)); doc = db.parse(inputsource); } catch (parserconfigurationexception e) { log.e("error: ",e.getmessage()); return null; } catch (saxexception e) { log.e("error: ",e.getmessage()); return null; } catch (ioexception e) { log.e("error: ",e.getmessage()); return null; } //return dom return doc; } public string getvalue(element item, string str){ n = ((document) item).getelementsbytagname(str); return this.getelementvalue(n.item(0)); } private final string getelementvalue(node elem){ // todo auto-generated method stub if(elem.haschildnodes()){ for(child = elem.getfirstchild(); child != null; child = child.getnextsibling()){ if(child.getnodetype() == node.text_node){ return child.getnodevalue(); } } } return null; } public void parsexml(){ xml = parser.getxmlfromurl(url); //getting xml on line, line 149, receive error says"the method getxmlfromurl(string) undefined type xmlpullparser"
doc = parser.getdomelement(xml); //getting dom element and, on line, line 150, receive error says, "the method getdomelement(string) undefined type xmlpullparser"
nl = doc.getelementsbytagname(players); (int = 0; < nl.getlength(); i++){ playerpd = parser.getvalue(e, player_pd); //playerpd child value also, on line , 1 follows it, lines 155 & 156, receive error says, "e cannot resolved variable"
playertype = parser.getvalue(e, player_type); //player type child value } } } if helps, layout of xml file trying parse this:
-<players> -<player id=""> <playertype></playertype> </player> </players> any appreciated, , in advance.
remove parser.
public void parsexml(){ xml = getxmlfromurl(url); //getting xml or can create class xmlparser , add getxmlfromurl function inside new class
similarly other functions
doc = getdomelement(xml); //getting dom element your lines 155 & 156 not in full source code i'm not sure context.
so you've mentioned original tutorial. tutorial means need create new file xmlparser.java containing new class called xmlparser
public class xmlparser { } then add functions class
public class xmlparser { public string getxmlfromurl(string url) { string xml = null; try { // defaulthttpclient defaulthttpclient httpclient = new defaulthttpclient(); httppost httppost = new httppost(url); httpresponse httpresponse = httpclient.execute(httppost); httpentity httpentity = httpresponse.getentity(); xml = entityutils.tostring(httpentity); } catch (unsupportedencodingexception e) { e.printstacktrace(); } catch (clientprotocolexception e) { e.printstacktrace(); } catch (ioexception e) { e.printstacktrace(); } // return xml return xml; } } so on , forth, adding other functions class. can use class mainactivity class.
as e cannot resolved variable, there's missing line in web page.
nodelist nl = doc.getelementsbytagname(key_item); // looping through item nodes <item> (int = 0; < nl.getlength(); i++) { element e = (element)nl.item(i); // >>> missing line in sample <<< string name = parser.getvalue(e, key_name); // name child value string cost = parser.getvalue(e, key_cost); // cost child value string description = parser.getvalue(e, key_desc); // description child value }
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