Android GPS NullpointerException

我的應用程序出現問題。當我嘗試獲取GPS位置時，我的應用程序給我一個NullPointerException，我啓動了一個位置管理器和一個位置監聽器。上下文是MainAplication背景下，以前進口Android GPS NullpointerException

我的代碼：

mLocationManager=(LocationManager)MainActivity.context.getSystemService(Context.LOCATION_SERVICE); 
    //mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 15000, 0, loclistener); 

    if(mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)==true){ 

     //skt.MostrarToast(MainActivity.context, "GPS Habilitado..."); 
     Log.i("Manada3", "GPS habilitado"); 
     gpsEn=true; 
     MainActivity.looperStatus=true; 

    }else{ 
     //skt.MostrarToast(MainActivity.context, "GPS Deshabilitado..."); 
     //skt.MostrarToast(MainActivity.context, "Favor habilitar GPS..."); 
     Log.i("Manada3", "GPS Deshabilitado"); 
     Toast.makeText(getBaseContext(), "GPS DESHABILITADO",Toast.LENGTH_SHORT).show(); 
     gpsEn=false; 
     MainActivity.looperStatus=false; 
    } 

    if(gpsEn==true){ 

     //locLatitud=mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); 

     //Log.i("Manada3", "locLatitud:"+locLatitud); 
     //mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, loclistener); 

     loclistener=new LocationListener() { 

      @Override 
      public void onLocationChanged(Location location) { 
       Log.i("Manada3", "onLocationChanged 1"); 
       if(MainActivity.looperStatus==false){ 
        mLocationManager.removeUpdates(loclistener); 
        MainActivity.looperStatus=false; 
       } 
       // TODO Auto-generated method stub 
       Log.i("Manada3","GPSLoggerService.onLocationChanged()"); 
       locLatitud2 = location.getLatitude(); 
       locLongitud2 = location.getLongitude(); 
       st_latitud=String.valueOf(locLatitud2); 
       st_longitud=String.valueOf(locLongitud2); 
       Log.i("Manada3", "Coordenadas:"+st_latitud+" "+st_longitud); 

       //soquet.ans2.notify(); 
      } 
      @Override 
      public void onProviderDisabled(String arg0) { 
       // TODO Auto-generated method stub 
       Log.i("Manada3","Provider Disabled"); 
       stopSelf(); 
       //Looper.myLooper().quit(); 
       loclistener=null; 
      } 
      @Override 
      public void onProviderEnabled(String arg0) { 
       // TODO Auto-generated method stub 
       Log.i("Manada3","Provider Enabled"); 
      } 
      @Override 
      public void onStatusChanged(String arg0, int arg1, Bundle arg2) { 
       // TODO Auto-generated method stub 
       Log.i("Manada3","Status Changed"); 
      } 


     }; 


     if(mLocationManager==null){ 
      mLocationManager=(LocationManager)MainActivity.context.getSystemService(Context.LOCATION_SERVICE); 
     } 
     mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 15000, 0, loclistener,Looper.getMainLooper()); 

     locLatitud2 = locLatitud.getLatitude(); 
     locLongitud2 = locLatitud.getLongitude(); 
     Log.i("Manada3", "Coordenadas:"+locLatitud2+" "+locLongitud2); 

    }else{ 
     Log.i("Manada3","Error 300"); 
    } 

}

我logcat的信息：

07-28 13:05:26.678: E/AndroidRuntime(5138): FATAL EXCEPTION: main 
    07-28 13:05:26.678: E/AndroidRuntime(5138): java.lang.NullPointerException 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at com.example.manada4.PruebaService.startLoggingService(PruebaService.java:222) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at com.example.manada4.PruebaService.access$0(PruebaService.java:148) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at com.example.manada4.PruebaService$IncomingHandler.handleMessage(PruebaService.java:86) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at android.os.Handler.dispatchMessage(Handler.java:99) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at android.os.Looper.loop(Looper.java:137) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at android.app.ActivityThread.main(ActivityThread.java:4921) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at java.lang.reflect.Method.invokeNative(Native Method) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at java.lang.reflect.Method.invoke(Method.java:511) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
    07-28 13:05:26.678: E/AndroidRuntime(5138):  at dalvik.system.NativeStart.main(Native Method)

來源

2013-07-28 volivares

哪個是'PruebaService.java'中的第222行？ –

PruebaService.java是一個包裝GPS連接的服務。 – volivares

是的，可能是這樣，但它似乎在該文件的第222行中崩潰，因此看到這樣會有幫助。 –

你有沒有在清單文件添加權限？

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

來源

2013-07-28 19:27:52

我有權限。 – volivares

Android GPS NullpointerException

回答

相關問題