getDetectedActivity is only getting called once.

[aalap03]

This is my code to post location to server with two filters

1. if my device is not still and
2. if it has accuracy less than 40

With delay parameter in detectedActivity Observable as 0 and my LocationRequest Interval is also 5 secs.I expect logs in zip method frequently (and not in the onNext or onError as my device is still) but I only see log with test zip once. If I have understood it wrong please correct me or please let me know where I have made mistake in my code below.

   long INTERVAL = 1000*5;
   locationRequest = LocationRequest
            .create()
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setInterval(INTERVAL)
            .setFastestInterval(INTERVAL);

   Observable<Location> updatedLocation = provider.getUpdatedLocation(locationRequest);
   Observable<ActivityRecognitionResult> detectedActivity = provider.getDetectedActivity(0);

    compositeDisposable.add(
            Observable.zip(updatedLocation, detectedActivity, (location, result) -> {
                isDeviceMoving = result.getMostProbableActivity().getType() != DetectedActivity.STILL;
                Log.d(TAG, "test: zip moving ? " + isDeviceMoving);
                return location;
            })
                    .filter(location -> isDeviceMoving)
                    .filter(location -> location.getAccuracy() <= 40)
                    .subscribe(location -> Log.d(TAG, "test: " + location)
                            , throwable -> Log.d(TAG, "test: er " + throwable.getLocalizedMessage())));