Unable to check whether coordinates lies on road

Question

I am trying to add a Check in my app to follow predefined route map.I am using isLocationOnPath method but its showing me Toast of "Please follow route" even when I am following the route.

Below I have my code:

    private void StartCheckingForQuestionInRadius() {

        if (visitedPoints == null) {
            visitedPoints = new ArrayList<LatLng>();
        }


        try {
            final Runnable r = new Runnable() {
                public void run() {
                    if (handelrCheck) {
                        if (visitedPoints.size() != allQuestions.size() && QuestionOnTheRoute() < mCircle.getRadius() && !isDone() && Integer.parseInt(allQuestions.get(questionNumber).getSequence())==sequenceFlag) {
                            visitedPoints.add(new LatLng(Double.parseDouble(allQuestions.get(questionNumber).getLat()), Double.parseDouble(allQuestions.get(questionNumber).getLng())));
                            showPopup(); // show question pop up when it is inside user radius
                            //add viisited check point to menu
                            VisitedcheckPoint++;
                            sequenceFlag++;
                            heading5.add("" + VisitedcheckPoint);
                            for (int i = 0; i < heading5.size(); i++) {
                                if (heading5.size() > 1) {
                                    heading5.remove(0);
                                }
                            }
                        }

                        else if (checkCompleteSurvey()<mCircle.getRadius()) { // when user complete survey
                            handelrCheck = false;
                            handlerForQuestions = null;
                            showAllAnswers(); // show all ansers to user when user complete survey

                        }
                        if (!PolyUtil.isLocationOnPath(new LatLng(AppPreferences.getLatitude(mCurrentActivity),AppPreferences.getLongitude(mCurrentActivity)),routePoints,true,50)){
                            Toast.makeText(mCurrentActivity, "Please follow the route", Toast.LENGTH_SHORT).show();
                        }

//                        else if (visitedPoints.size() == databaseHandler.getQuestionOnRoute().size()) { // when user complete survey
//                            handelrCheck = false;
//                            handlerForQuestions = null;
//                            showAllAnswers(); // show all ansers to user when user complete survey
//
//                        }
                    }

                    if (handlerForQuestions != null)
                        handlerForQuestions.postDelayed(this, pooltime);
                }

            };

            handlerForQuestions.postDelayed(r, pooltime);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

I am calling this method in the Event as below:

 @Subscribe
    public void onEvent(String action) {
        if (action.equalsIgnoreCase(PreferencesKeys.LOCATION_UPDATED)) {
            firstTime = true;
            firstTime = true;
            myLocation = new LatLng(AppPreferences.getLatitude(mCurrentActivity), AppPreferences.getLongitude(mCurrentActivity));
            if (mCircle != null) {
                mCircle.remove();
            }
            drawMarkerWithCircle(myLocation);
            if (firstTime) {
                //       animateCameraTo(AppPreferences.getLatitude(mCurrentActivity), AppPreferences.getLongitude(mCurrentActivity));
            }
            if (handelrCheck && handlerForQuestions == null) {
                handlerForQuestions = new Handler();
                StartCheckingForQuestionInRadius();
            }
        }
    }