NullPointerException lorsque j'essaie de lire une ressource

Question

J'ai un projet Gluon Mobile JavafX.

J'essaie de lire une ressource de mon apk et je reçois une erreur seulement dans Android.

private void leerConfiguracion() { logger.log(Level.INFO, "ConfiguradorGeneralService:leerConfiguracion: BEGIN ... "); 

    try 
    { 

     File fileLugares = new File(ConfiguradorGeneralService.class.getResource("/com/registrodevisitas/json/configuracion.json").getFile()); 


     logger.log(Level.INFO, "ConfiguradorGeneralService:leerConfiguracion: Leyendo configuración: " + fileLugares.getAbsolutePath()); 

     // create a FileClient to the specified File 

     FileClient fileClient = FileClient.create(fileLugares); 

     // create a JSON converter that converts the nodes from a JSON array into language objects 

     InputStreamIterableInputConverter<ConfiguradorGeneral> converter = new JsonIterableInputConverter<>(ConfiguradorGeneral.class); 

     // retrieve a list from a ListDataReader created from the FileClient 

     configuracion = DataProvider.retrieveList(fileClient.createListDataReader(converter)); 


    } 
    catch(Exception e) 
    { 
     logger.log(Level.SEVERE, e.getMessage(), e); 
    } 

    logger.log(Level.INFO, "ConfiguradorGeneralService:leerConfiguracion: END "); 


} 

L'erreur sur Android est:

I/figuradorGeneralService(11481): ConfiguradorGeneralService:leerConfiguracion: BEGIN ... 
E/figuradorGeneralService(11481): null 
E/figuradorGeneralService(11481): java.lang.NullPointerException 
E/figuradorGeneralService(11481):  at com.registrodevisitas.services.ConfiguradorGeneralService.leerConfiguracion(ConfiguradorGeneralService.java:50) 
E/figuradorGeneralService(11481):  at com.registrodevisitas.services.ConfiguradorGeneralService.<init>(ConfiguradorGeneralService.java:34) 
E/figuradorGeneralService(11481):  at java.lang.Class.newInstanceImpl(Native Method) 
E/figuradorGeneralService(11481):  at java.lang.Class.newInstance(Class.java:1208) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.lambda$getDefaultInstanceSupplier$8(Injector.java:233) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.access$lambda$3(Injector.java) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector$$Lambda$4.apply(Unknown Source) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.instantiateModelOrService(Injector.java:116) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.injectMembers(Injector.java:151) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.injectMembers(Injector.java:136) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.injectAndInitialize(Injector.java:129) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.registerExistingAndInject(Injector.java:107) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.injection.Injector.instantiatePresenter(Injector.java:60) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView.lambda$loadSynchronously$2(FXMLView.java:89) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView.access$lambda$1(FXMLView.java) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView$$Lambda$2.call(Unknown Source) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:929) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441) 
E/figuradorGeneralService(11481):  at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView.loadSynchronously(FXMLView.java:91) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView.initializeFXMLLoader(FXMLView.java:100) 
E/figuradorGeneralService(11481):  at com.airhacks.afterburner.views.FXMLView.getView(FXMLView.java:112) 
E/figuradorGeneralService(11481):  at com.registrodevisitas.RegistroDeVisitas.lambda$init$0(RegistroDeVisitas.java:55) 
E/figuradorGeneralService(11481):  at com.registrodevisitas.RegistroDeVisitas.access$lambda$0(RegistroDeVisitas.java) 
E/figuradorGeneralService(11481):  at com.registrodevisitas.RegistroDeVisitas$$Lambda$1.get(Unknown Source) 
E/figuradorGeneralService(11481):  at com.gluonhq.impl.charm.a.d.a.a(SourceFile:32) 
E/figuradorGeneralService(11481):  at com.gluonhq.charm.glisten.application.MobileApplication.a(SourceFile:620) 
E/figuradorGeneralService(11481):  at com.gluonhq.charm.glisten.application.MobileApplication.switchView(SourceFile:391) 
E/figuradorGeneralService(11481):  at com.gluonhq.charm.glisten.application.MobileApplication.switchView(SourceFile:368) 
E/figuradorGeneralService(11481):  at com.gluonhq.charm.glisten.application.MobileApplication.start(SourceFile:218) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$144(LauncherImpl.java:863) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.LauncherImpl.access$lambda$8(LauncherImpl.java) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.LauncherImpl$$Lambda$9.run(Unknown Source) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$157(PlatformImpl.java:326) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.access$lambda$6(PlatformImpl.java) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl$$Lambda$7.run(Unknown Source) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.lambda$null$155(PlatformImpl.java:295) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.access$lambda$18(PlatformImpl.java) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl$$Lambda$19.run(Unknown Source) 
E/figuradorGeneralService(11481):  at java.security.AccessController.doPrivileged(AccessController.java:52) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.lambda$runLater$156(PlatformImpl.java:294) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl.access$lambda$5(PlatformImpl.java) 
E/figuradorGeneralService(11481):  at com.sun.javafx.application.PlatformImpl$$Lambda$6.run(Unknown Source) 
E/figuradorGeneralService(11481):  at com.sun.glass.ui.monocle.RunnableProcessor.runLoop(RunnableProcessor.java:92) 
E/figuradorGeneralService(11481):  at com.sun.glass.ui.monocle.RunnableProcessor.run(RunnableProcessor.java:51) 
E/figuradorGeneralService(11481):  at java.lang.Thread.run(Thread.java:8 
I/figuradorGeneralService(11481): ConfiguradorGeneralService:leerConfiguracion: END 

Ce fichier est sur la ressource/COM ....

Cette méthode fonctionne parfaitement sur les fenêtres.

Toute aide serait bien. Je vous remercie.

Answer 1

Sur Android (et iOS), vous ne pouvez pas accéder directement aux ressources classpath en tant que fichier, comme vous pouvez le faire sur le bureau. Au lieu de cela, vous devez accéder aux ressources en utilisant InputStream. Cela fonctionne sur toutes les plateformes supportées (android, iOS et desktop).

Essayez d'accéder à votre ressource avec le code suivant:

BasicInputDataSource source = new BasicInputDataSource(ConfiguradorGeneralService.class.getResourceAsStream("/com/registrodevisitas/json/configuracion.json")); 

InputStreamIterableInputConverter<ConfiguradorGeneral> converter = new JsonIterableInputConverter<>(ConfiguradorGeneral.class); 

configuracion = DataProvider.retrieveList(new InputStreamListDataReader<>(source, converter));