codenameone - Can we code cn1 inside native interface? -


there location manager in cn1 works fine project. need update location value using jobscheduler every few minutes. have done jobscheduler using native interface , need gps code in 1 of method (onstartjob() method here). don't want code location manager(gps) again in native native android. hence used cn1 location provider directly in native interface , giving error. can mix cn1 in native interface smhow?

public class myjobservice extends jobservice {  @override     public boolean onstartjob(jobparameters jobparameters) {         checkgps();         toast.maketext(this,                 "live track running jobscheduler",                 toast.length_short).show();         return false;     }      @override     public boolean onstopjob(jobparameters jobparameters) {         toast.maketext(this,                 "live track running 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);         }     });     } }

error log:

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 invoke virtual method 'com.codename1.location.locationmanager com.codename1.impl.codenameoneimplementation.getlocationmanager()' on null object reference    @ android.app.job.jobservice$jobhandler.handlemessage(jobservice.java:130)    @ android.os.handler.dispatchmessage(handler.java:102)    @ android.os.looper.loop(looper.java:148)    @ android.app.activitythread.main(activitythread.java:7409)    @ java.lang.reflect.method.invoke(native method)    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1230)    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:1120) caused by: java.lang.nullpointerexception: attempt invoke virtual method 'com.codename1.location.locationmanager com.codename1.impl.codenameoneimplementation.getlocationmanager()' on null object reference    @ com.codename1.ui.display.getlocationmanager(display.java:3091)    @ com.codename1.location.locationmanager.getlocationmanager(locationmanager.java:70)    @ com.capitaleyenepal.nokia.myjobservice.checkgps(myjobservice.java:56)    @ com.capitaleyenepal.nokia.myjobservice.onstartjob(myjobservice.java:30)    @ android.app.job.jobservice$jobhandler.handlemessage(jobservice.java:126)    @ android.os.handler.dispatchmessage(handler.java:102)     @ android.os.looper.loop(looper.java:148)     @ android.app.activitythread.main(activitythread.java:7409)     @ java.lang.reflect.method.invoke(native method)     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1230)     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:1120) 

this happening because codename 1 isn't running. need make sure display class initialized using code such as:

if(display.isinitialized()) {     ... }

if it's not can try calling init , pass context object, advise against if possible there nuances. suggest looking @ androidimplementation.java file if choose follow path.


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