Pouvons-nous coder cn1 dans une interface native?

Question

Il y a un gestionnaire de localisation dans cn1 qui fonctionne très bien pour mon projet. Mais j'ai besoin de mettre à jour la valeur de l'emplacement en utilisant jobscheduler toutes les quelques minutes. J'ai fait jobScheduler en utilisant une interface native et j'ai besoin de code gps dans l'une de ses méthodes (méthode onStartJob() ici). Donc, je ne veux pas coder le gestionnaire de localisation (gps) à nouveau dans natif android natif. Par conséquent, j'ai utilisé le fournisseur de localisation cn1 directement dans l'interface native et il donne une erreur. Puis-je mélanger cn1 dans l'interface native de smhow?

public class MyJobService extends JobService { 

@Override 
    public boolean onStartJob(JobParameters jobParameters) { 
     if (Display.isInitialized()) {//updated 
      checkGPS(); 
     } 
     Toast.makeText(this, 
       "Live track running with jobScheduler", 
       Toast.LENGTH_SHORT).show(); 
     return false; 
    } 

    @Override 
    public boolean onStopJob(JobParameters jobParameters) { 
     Toast.makeText(this, 
       "Live track running with jobScheduler stops", 
       Toast.LENGTH_SHORT).show(); 
     return false; 
    } 

    //using cn1 location manager... 
    public void checkGPS() { 
    LocationManager.getLocationManager().setLocationListener(new LocationListener() { 

     @Override 
     public void locationUpdated(Location location) { 
      loc = location; 
      latitude = location.getLatitude(); 
      longitude = location.getLongitude(); 
      System.out.println("locationUpdated latitudeeee " + latitude); 
      System.out.println("locationUpdated longitudeeee " + longitude); 
     } 

     @Override 
     public void providerStateChanged(int newState) { 
      System.out.println("newState " + newState); 
     } 
    }); 
    } 
} 

journal d'erreur:

09-11 10:48:14.980 15455-15455/? E/JobService: Error while executing job: 1 
09-11 10:48:14.990 15455-15455/? E/AndroidRuntime: FATAL EXCEPTION: main 
Process: com.capitaleyenepal.nokia, PID: 15455 
java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'com.codename1.location.LocationManager com.codename1.impl.CodenameOneImplementation.getLocationManager()' on a null object reference 
    at android.app.job.JobService$JobHandler.handleMessage(JobService.java:130) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:7409) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.codename1.location.LocationManager com.codename1.impl.CodenameOneImplementation.getLocationManager()' on a null object reference 
    at com.codename1.ui.Display.getLocationManager(Display.java:3091) 
    at com.codename1.location.LocationManager.getLocationManager(LocationManager.java:70) 
    at com.capitaleyenepal.nokia.MyJobService.checkGPS(MyJobService.java:56) 
    at com.capitaleyenepal.nokia.MyJobService.onStartJob(MyJobService.java:30) 
    at android.app.job.JobService$JobHandler.handleMessage(JobService.java:126) 
    at android.os.Handler.dispatchMessage(Handler.java:102)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:7409)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)  

Update1: Si je supprime la méthode checkGPS() qui a des codes CN1 pour l'emplacement, le JobScheduler fonctionne très bien.

@Override 
public boolean onStartJob(JobParameters jobParameters) { 
    if (Display.isInitialized()) { 
     checkGPS(); 
    } 
    return false; 
} 

Erreur lors du débogage (application se bloque) méthode

10-18 11:33:36.608 2580-2726/? E/ActivityManager: ANR in com.capitaleyenepal.nokia 
PID: 15661 
Reason: executing service com.capitaleyenepal.nokia/.MyJobService 
Load: 0.0/0.0/0.0 
CPU usage from 97817ms to 0ms ago: 
5.6% 2580/system_server: 3.6% user + 2% kernel/faults: 8228 minor 44 major 
3.2% 1102/mmcqd/0: 0% user + 3.2% kernel 
2.1% 3681/com.samsung.android.providers.context: 1.2% user + 0.8% kernel/faults: 2529 minor 397 major 
0.9% 1262/mc_fastcall: 0% user + 0.9% kernel 
0.5% 22199/com.sec.spp.push:RemoteDlcProcess: 0.3% user + 0.2% kernel/faults: 1906 minor 1027 major 
0.9% 3136/com.android.systemui: 0.7% user + 0.1% kernel/faults: 11113 minor 7 major 
0.7% 24072/adbd: 0.2% user + 0.5% kernel/faults: 1053 minor 
0.5% 16674/logcat: 0.2% user + 0.3% kernel/faults: 17 minor 
0.3% 7253/com.android.bluetooth: 0.2% user + 0.1% kernel/faults: 1791 minor 
0.3% 4423/com.google.android.gms.persistent: 0.2% user + 0% kernel/faults: 1875 minor 
0.3% 2241/jbd2/dm-0-8: 0% user + 0.3% kernel 
0.2% 2115/servicemanager: 0.1% user + 0.1% kernel 
0.2% 7549/com.samsung.android.sm.provider: 0.1% user + 0% kernel/faults: 768 minor 
0.1% 2117/surfaceflinger: 0% user + 0.1% kernel/faults: 127 minor 
0.1% 2268/argosd: 0.1% user + 0% kernel 
0.1% 3114/com.android.phone: 0.1% user + 0% kernel/faults: 333 minor 
0% 2284/fingerprintd: 0% user + 0% kernel/faults: 1234 minor 
0.1% 15594/kworker/0:3: 0% user + 0.1% kernel 
0.1% 15661/com.capitaleyenepal.nokia: 0.1% user + 0% kernel/faults: 2 minor 
0.1% 16390/com.google.android.gms: 0.1% user + 0% kernel/faults: 3539 minor 2 major 
0.1% 15207/kworker/1:1: 0% user + 0.1% kernel 
0.1% 16358/com.google.android.gms.persistent: 0% user + 0% kernel/faults: 1797 minor 
0% 2277/sdp_cryptod: 0% user + 0% kernel/faults: 74 minor 
0.1% 3403/android.process.acore: 0% user + 0% kernel/faults: 182 minor 
0.1% 12561/cfinteractive0: 0% user + 0.1% kernel 
0.1% 7/rcu_preempt: 0% user + 0.1% kernel 
0.1% 7424/com.samsung.android.sm: 0% user + 0% kernel/faults: 541 minor 
0% 15160/kworker/2:1: 0% user + 0% kernel 
0% 7618/com.opera.max.oem: 0% user + 0% kernel/faults: 43 minor 
0% 16656/kworker/3:0: 0% user + 0% kernel 
0% 2114/lmkd: 0% user + 0% kernel 
0% 9858/com.sec.spp.push: 0% user + 0% kernel/faults: 15 minor 
0% 1453/dhd_dpc: 0% user + 0% kernel 
0% 10/migration/0: 0% user + 0% kernel 
0% 13/migration/1: 0% user + 0% kernel 
0% 23/migration/3: 0% user + 0% kernel 
0% 2086/kworker/0:1H: 0% user + 0% kernel 
0% 13720/com.facebook.katana: 0% user + 0% kernel/faults: 426 minor 1 major 
0% 16211/com.samsung.cmh:CMH: 0% user + 0% kernel/faults: 38 minor 
0% 25159/com.google.android.gms: 0% user + 0% kernel/faults: 2183 minor 
0% 18/migration/2: 0% user + 0% kernel 
0% 28/migration/4: 0% user + 0% kernel 
0% 616/ion_noncontig_h: 0% user + 0% kernel 
0% 686/kswapd0: 0% user + 0% kernel 
0% 2113/healthd: 0% user + 0% kernel 
0% 12378/wpa_supplicant: 0% user + 0% kernel/faults: 1 minor 
0% 16576/com.sec.android.daemonapp: 0% user + 0% kernel/faults: 254 minor 
0% 17723/com.sec.android.inputmethod: 0% user + 0% kernel/faults: 2743 minor 
0% 1//init: 0% user + 0% kernel/faults: 46 minor 
0% 30/kworker/4:0: 0% user + 0% kernel 
0% 33/migration/5: 0% user + 0% kernel 
0% 38/migration/6: 0% user + 0% kernel 
0% 1475/ueventd: 0% user + 0% kernel 
0% 2122/tee_scheduler: 0% user + 0% kernel 
0% 2252/edmaudit: 0% user + 0% kernel 
0% 2257/rild: 0% user + 0% kernel/faults: 35 minor 
0% 2323/rild: 0% user + 0% kernel/faults: 53 minor 
0% 16370/com.google.process.gapps: 0% user + 0% kernel/faults: 31 minor 
0% 8/rcu_sched: 0% user + 0% kernel 
0% 14/ksoftirqd/1: 0% user + 0% kernel 
0% 43/migration/7: 0% user + 0% kernel 
0% 870/hwrng: 0% user + 0% kernel 
0% 1451/dhd_watchdog_th: 0% user + 0% kernel 
0% 2087/kworker/2:1H: 0% user + 0% kernel 
0% 2116/mcDriverDaemon: 0% user + 0% kernel/faults: 656 minor 
0% 2254/netd: 0% user + 0% kernel/faults: 17 minor 
0% 2278/diagexe: 0% user + 0% kernel 
0% 2913/tlc_s 

checkGps()

public void checkGPS() { 

    LocationManager.getLocationManager().setLocationListener(new LocationListener() { 

    @Override 
    public void locationUpdated(Location location) { 
     loc = location; 
     latitude = location.getLatitude(); 
     longitude = location.getLongitude(); 
     System.out.println("locationUpdated latitudeeee " + latitude); 
     System.out.println("locationUpdated longitudeeee " + longitude); 
    } 

    @Override 
    public void providerStateChanged(int newState) { 
     System.out.println("newState " + newState); 
    } 
}); 
} 

Answer 1

Cela se produit parce que Codename One ne fonctionne pas. Vous devez vous assurer que la classe Display est initialisé en utilisant un code tel que:

if(Display.isInitialized()) { 
    ... 
} 

Si ce n'est pas, vous pouvez essayer d'appeler init et passer votre objet de contexte, je le déconseille si possible car il y a quelques nuances. Je suggère de regarder le fichier AndroidImplementation.java si vous choisissez de suivre ce chemin.