android - XmlPullParser - get data from tag with specific attributevalue -
i'm creating parser xml-file , works fine until add option retrieve link. have several tags of same name , want 1 specific tag specific attribute value.
... <artist> <name>venom</name> <mbid>5ddddef1-fd5a-4ca8-8e89-df4adff4239b</mbid> <url>venom</url> <image size="small">http://userserve-ak.last.fm/serve/34/35628151.png</image> <image size="medium">http://userserve-ak.last.fm/serve/64/35628151.png</image> <image size="large">http://userserve-ak.last.fm/serve/126/35628151.png</image> <image size="extralarge">http://userserve-ak.last.fm/serve/252/35628151.png</image> </artist> ... i'm fishing link in "extralarge".
my current code:
... private trackinfo readtrack(xmlpullparser parser) throws xmlpullparserexception, ioexception { parser.require(xmlpullparser.start_tag, ns, "track"); string artist = null; string artistpic = null; string artismbid = null; string song = null; string album = null; while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string name = parser.getname(); if (name.equals("artist")) { parser.require(xmlpullparser.start_tag, ns, "artist"); while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string artistname = parser.getname(); if (artistname.equals("name")) { artist = readartist(parser); } else if (artistname.equals("mbid")) { artismbid = readartistmbid(parser); } else if (artistname.equals("image")) { artistpic = readartistpic(parser); } else { skip(parser); } } } else if (name.equals("name")) { song = readsong(parser); } else if (name.equals("album")) { album = readalbum(parser); } else { skip(parser); } } return new trackinfo(artist, artistpic, artismbid, song, album); } ... private string readartistpic(xmlpullparser parser) throws xmlpullparserexception, ioexception { string artistpic = ""; parser.require(xmlpullparser.start_tag, ns, "image"); string tag = parser.getname(); string reltype = parser.getattributevalue(null, "size"); if (tag.equals("image")) { if (reltype.equals("extralarge")) { artistpic = readtext(parser); parser.nexttag(); } } parser.require(xmlpullparser.end_tag, ns, "image"); return artistpic; } ... private string readtext(xmlpullparser parser) throws xmlpullparserexception, ioexception { string result = ""; if (parser.next() == xmlpullparser.text) { result = parser.gettext(); parser.nexttag(); } return result; } ... the error:
e/currenttrackfragment logging﹕ xmlpullparserexception: org.xmlpull.v1.xmlpullparserexception: expected: end_tag {null}image (position:start_tag <image size='small'>@10:29 in java.io.inputstreamreader@52a3a014) anybody idea how handle this?
solution!
i started working example raghunandan gave me. in end simplified code , added 'check = true' suggested.
private trackinfo readtrack(xmlpullparser parser) throws xmlpullparserexception, ioexception { parser.require(xmlpullparser.start_tag, ns, "track"); boolean nowplaying = false; string artist = null; string artistpic = null; string artistmbid = null; string song = null; string songurl = null; string album = null; string albumpic = null; int playeduts = 0; while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string name = parser.getname(); if (name.equals("artist")) { parser.require(xmlpullparser.start_tag, ns, "artist"); while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string artistname = parser.getname(); if (artistname.equals("name")) { artist = readartist(parser); } else if (artistname.equals("mbid")) { artistmbid = readartistmbid(parser); } else if (artistname.equals("image")) { boolean check = false; string imagesize = parser.getattributevalue(null, "size"); if (imagesize.equals("extralarge")) { check = true; } if (check) { artistpic = readartistpic(parser); } else { parser.nexttext(); } } else { skip(parser); } } } else if (name.equals("name")) { song = readsong(parser); } else if (name.equals("url")) { songurl = readsongurl(parser); } else if (name.equals("album")) { album = readalbum(parser); } else if (name.equals("date")) { playeduts = integer.parseint(readuts(parser)); } else { skip(parser); } } return new trackinfo(nowplaying, artist, artistpic, artistmbid, song, songurl, album, albumpic, playeduts); } ... private string readartistpic(xmlpullparser parser) throws xmlpullparserexception, ioexception { parser.require(xmlpullparser.start_tag, ns, "image"); string artistpic = readtext(parser); parser.require(xmlpullparser.end_tag, ns, "image"); return artistpic; } ...
without full stacktrace hard point mistake. below works.
public class xmlpullparserhandler { private string text; public xmlpullparserhandler() { } public void parse(inputstream is) { // pas input stream xmlpullparserfactory factory = null; xmlpullparser parser = null; try { factory = xmlpullparserfactory.newinstance(); factory.setnamespaceaware(true); parser = factory.newpullparser(); parser.setinput(is, null); boolean check =false; //factory instantiates object int eventtype = parser.geteventtype(); while (eventtype != xmlpullparser.end_document) { string tagname = parser.getname(); switch (eventtype) { case xmlpullparser.start_tag: if (tagname.equalsignorecase("image")) { if(parser.getattributevalue(null, "size").equals("extralarge")) { check=true; } } break; case xmlpullparser.text: text = parser.gettext(); break; case xmlpullparser.end_tag: string val = null; if (tagname.equalsignorecase("name")) { val=text; log.i(""," name "+val); } else if (tagname.equalsignorecase("mbid")) { val=text; log.i(""," mbid "+val); } else if (tagname.equalsignorecase("url")) { val=text; log.i(""," url "+val); } else if (tagname.equalsignorecase("image")) { val=text; if(check == true) log.i(""," image "+val); } break; default: break; } eventtype = parser.next(); } } catch (xmlpullparserexception e) { e.printstacktrace(); } catch (ioexception e) { e.printstacktrace(); } return null; } } the log
04-24 04:39:06.906: i/(1539): name venom 04-24 04:39:06.906: i/(1539): mbid 5ddddef1-fd5a-4ca8-8e89-df4adff4239b 04-24 04:39:06.916: i/(1539): url venom 04-24 04:39:06.916: i/(1539): name http://userserve-ak.last.fm/serve/252/35628151.png alternative solution :
private trackinfo readtrack(xmlpullparser parser) throws xmlpullparserexception, ioexception { parser.require(xmlpullparser.start_tag, ns, "track"); boolean nowplaying = false; string artist = null; string artistpic = null; string artistmbid = null; string song = null; string songurl = null; string album = null; string albumpic = null; int playeduts = 0; while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string name = parser.getname(); if (name.equals("artist")) { parser.require(xmlpullparser.start_tag, ns, "artist"); while (parser.next() != xmlpullparser.end_tag) { if (parser.geteventtype() != xmlpullparser.start_tag) { continue; } string artistname = parser.getname(); if (artistname.equals("name")) { artist = readartist(parser); } else if (artistname.equals("mbid")) { artistmbid = readartistmbid(parser); } else if (artistname.equals("image")) { boolean check = false; string imagesize = parser.getattributevalue(null, "size"); if (imagesize.equals("extralarge")) { check = true; } if (check) { artistpic = readartistpic(parser); } else { parser.nexttext(); } } else { skip(parser); } } } else if (name.equals("name")) { song = readsong(parser); } else if (name.equals("url")) { songurl = readsongurl(parser); } else if (name.equals("album")) { album = readalbum(parser); } else if (name.equals("date")) { playeduts = integer.parseint(readuts(parser)); } else { skip(parser); } } return new trackinfo(nowplaying, artist, artistpic, artistmbid, song, songurl, album, albumpic, playeduts); } ... private string readartistpic(xmlpullparser parser) throws xmlpullparserexception, ioexception { parser.require(xmlpullparser.start_tag, ns, "image"); string artistpic = readtext(parser); parser.require(xmlpullparser.end_tag, ns, "image"); return artistpic; } ...
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