public final class PoseDetector

VisionCameraView<Pose> view =
        new VisionCameraView<Pose>(new PoseDetector());
view.setListener(new VisionPipelineListener<Pose>() {
    private boolean wasUp;

    public void result(Pose pose, VisionImage source) {
        Pose.Landmark wrist = pose.getLandmark(PoseLandmarks.RIGHT_WRIST);
        Pose.Landmark shoulder =
                pose.getLandmark(PoseLandmarks.RIGHT_SHOULDER);
        if (wrist == null || shoulder == null
                || wrist.getConfidence() < 0.6f) {
            return;
        }
        // Y grows downwards, so the wrist being "above" the shoulder is a
        // smaller Y.
        boolean up = wrist.getPosition().getY()
                < shoulder.getPosition().getY();
        if (up && !wasUp) {
            reps++;
            repLabel.setText(String.valueOf(reps));
        }
        wasUp = up;
    }

    public void error(Throwable error) {
        Log.e(error);
    }
});