FATAL EXCEPTION: main
                                                                                      Process: :my_service, PID: 28490
                                                                                      java.lang.RuntimeException: Unable to instantiate service .serviciosUbicacion.servicioUbicacion: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
                                                                                          at android.app.ActivityThread.handleCreateService(ActivityThread.java:2962)
                                                                                          at android.app.ActivityThread.access$1800(ActivityThread.java:178)
                                                                                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1553)
                                                                                          at android.os.Handler.dispatchMessage(Handler.java:111)
                                                                                          at android.os.Looper.loop(Looper.java:194)
                                                                                          at android.app.ActivityThread.main(ActivityThread.java:5631)
                                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                                          at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
                                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)
                                                                                       Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
                                                                                          at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:106)
                                                                                          at serviciosUbicacion.servicioUbicacion$LocationListener.<init>(servicioUbicacion.java:50)

public class Preferencias {



public static final String  idUsuario="00";

public final SharedPreferences misPreferencias;
public boolean estaLogueado = false;

private static Preferencias INSTANCIA;


public static Preferencias get(Context context) {
    if (INSTANCIA == null) {
        INSTANCIA = new Preferencias(context);
    }
    return INSTANCIA;
}
public    Preferencias(Context context) {
    misPreferencias = context.getApplicationContext().getSharedPreferences(empleado, Context.MODE_PRIVATE);
    estaLogueado = !TextUtils.isEmpty(misPreferencias.getString(NIT, null));
}

private class LocationListener implements android.location.LocationListener{
    Location mLastLocation;
    String ubicacion="";
    Preferencias preff = new Preferencias(getApplicationContext());
    int id_usuario = preff.misPreferencias.getInt(idUsuario,0);
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