java - Querying DBpedia with androjena -


i have problem when testing androjena api. in system have ask dbpedia dataset sending query.

this class:

import com.hp.hpl.jena.query.query; import com.hp.hpl.jena.query.queryexecution; import com.hp.hpl.jena.query.queryexecutionfactory; import com.hp.hpl.jena.query.queryfactory; import com.hp.hpl.jena.query.resultset; import com.hp.hpl.jena.query.resultsetfactory; import com.hp.hpl.jena.query.syntax; import com.hp.hpl.jena.rdf.model.rdfnode; import android.os.asynctask; public class querydbpedia extends asynctask <string, void, list<string>>{ //@override protected list<string> doinbackground(string... keyword) {     list<string> list=null;     string sparqlquery=                 "prefix rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n" +                 "prefix dbpedia-owl:<http://dbpedia.org/ontology/>\n" +                 "prefix rdfs:   <http://www.w3.org/2000/01/rdf-schema#> \n" +                 "prefix foaf: <http://xmlns.com/foaf/0.1/> \n"+                  "select distinct ?nom ?resource ?url {\n" +                 "?resource rdfs:label ?nom.\n" +                     "?resource foaf:isprimarytopicof ?url.\n" +                     "filter langmatches( lang(?nom), \"en\" ).\n" +                     "?nom <bif:contains> \"apple\".\n"+                     "} limit 10" ; system.out.println(sparqlquery); string service=  "http://dbpedia.org/sparql"; query qur=queryfactory.create(sparqlquery); queryexecution exec =queryexecutionfactory.sparqlservice(service,qur );  try{     resultset results = resultsetfactory.copyresults( exec.execselect() );      while ( results.hasnext() ) {          rdfnode s= results.next().get( "resource" );          list.add(s.tostring());          system.out.print(s.tostring());         }     }  catch (exception  e) {          e.printstacktrace();     }     finally{exec.close();}      return list; }}}

i using api, androjena_o5.jar, arqoid_0.5.jar, icu4j-3.4.5.jar, iri-0.8.jar, lucenoid_3.0.2, sl4j-android-1.6.1-rc1.jar

but when i'am executing code, got error:

fatal exception: asynctask #1 java.lang.runtimeexception: error occured while executing doinbackground() @ android.os.asynctask$3.done(asynctask.java:299) @ java.util.concurrent.futuretask$sync.innersetexception(futuretask.java:273) @ java.util.concurrent.futuretask.setexception(futuretask.java:124) @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:307) @ java.util.concurrent.futuretask.run(futuretask.java:137) @ android.os.asynctask$serialexecutor$1.run(asynctask.java:230) @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1076) @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:569) @ java.lang.thread.run(thread.java:856) caused by: java.lang.noclassdeffounderror:com.hp.hpl.jena.query.queryfactory @ com.example.testtvprg.querydbpedia.doinbackground(querydbpedia.java:73) @ com.example.testtvprg.querydbpedia.doinbackground(querydbpedia.java:1) @ android.os.asynctask$2.call(asynctask.java:287) @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:305)

it seems tha problem of api, can me please

finally find solution, problem after update of sdk or adt. followed solution cited here


Comments

Post a Comment

Popular posts from this blog

searchKeyword not working in AngularJS filter -

i writing app using angularjs on front end. want search through table word/field; 1 search box everything. according article here: http://hello-angularjs.appspot.com/searchtable can use filter: searchkeyword this. this code, , not working expected. <label>search: <input ng-model="searchkeyword"></label> <table ng-repeat="post in posts | orderby: sort | filter: searchkeyword"> <tr> <td> {{index(post)}} </td> <td> {{post.title}} </td> <td> {{post.author}} </td> <td> {{post.content}} </td> <td> {{post.date | date: "d/m/yyyy"}} </td> </tr> </table> what should do? thank you try this: controller $scope.posts = [ {title:'title one', author:'author one', content: 'content one'}, {title:'title two', author:'author two', content: 'cont...
Read more

sequelize.js - Sequelize: sort by enum cases -

i have model ( article ) field (the name type ) of type enum('source', 'translated') , return 1 article ordered type field. source articles should returned before translated articles. like: article.findone(order: [ { type: [ 'source', 'translated' ] } ]); unfortunately there appears no built-in solution sorting enums. instead have sort by case , couldn't find documentation on how sequelize. what conventional approach here? sorting case hard in sequelize, sort field (the second answer in linked post) should possible: order: sequelize.fn('field', sequelize.col('type'), 'source', 'translated') it's supported mysql far know though
Read more

user interface - how to replace an ongoing process of image capture from another process call over the same ImageLabel in python's GUI TKinter -

i trying use following code create interactive gui changes color-space(hsv, rbg, grayscale etc) on event of button click. display opencv video in tkinter using multiprocessing being new python having problems multiprocessing , attempts on making gui change it's color space on button clicks hangs entire system. on it's implementation highly appreciated. thankyou. below code: import cv2 pil import image,imagetk import tkinter tk import numpy np multiprocessing import process , queue def quit_it(root,process): root.destroy() process.terminate() def black_andwhite(root,process): process.terminate p=process(target=capture_image, args=(5,queue, )) p.start() root.after(0, func=lambda: update_all(root, image_label, queue)) def update_image(image_label, queue): frame = queue.get() = image.fromarray(frame) b = imagetk.photoimage(image=a) image_label.configure(image=b) image_label._image_cache = b root.update() def update_all(root...
Read more