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Animate marker to new location whenever driver location (lat lng) changes on the server

here I am getting the driver's location from server. I need to pass the driver lat lnt to the loop and animate the marker accordingly. I tried to pass it directly to the startpostion and endpostion. But the marker flickers continuesly.

when I pass the driver's lat lng directly to the startposition and endposition the marker moves to the new location but it comes back if it does not get new lat lat from the server and also flickers continuously.


private void GetDriverloc(HashMap<String, String> map) {
   Call<DriverLocationResToCus> call = apiInterface.GetDriverLoc(map);
   System.out.println("enter the currency alert api" + call.request().url());
   call.enqueue(new Callback<DriverLocationResToCus>() {
       @Override
       public void onResponse(Call<DriverLocationResToCus> call, Response<DriverLocationResToCus> response) {


           if (response.isSuccessful()) {

               assert response.body() != null;
               DriverStartLat = response.body().getDriverCurrentLatStart();
               DriverStartLng = response.body().getDriverCurrentLngStart();
               DriverEndLat = response.body().getDriverCurrentLatEnd();
               DriverEndLng = response.body().getDriverCurrentLngEnd();

Utilities.printV("DriverStartLat", DriverStartLat);

               ValueAnimator polylineAnimator = ValueAnimator.ofInt(0, 100);
               polylineAnimator.setDuration(2000);
               polylineAnimator.setInterpolator(new LinearInterpolator());
               polylineAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                   @Override
                   public void onAnimationUpdate(ValueAnimator valueAnimator) {
                       List<LatLng> points = greyPolyLine.getPoints();
                       int percentValue = (int) valueAnimator.getAnimatedValue();
                       int size = points.size();
                       int newPoints = (int) (size * (percentValue / 100.0f));
                       List<LatLng> p = points.subList(0, newPoints);
                       blackPolyline.setPoints(p);
                   }
               });
               polylineAnimator.start();



                   mHandler = new Handler();
                   index = -1;
                   next = 1;
                   mHandler.postDelayed(new Runnable() {
                       @Override
                       public void run() {

                       if (index < points.size() - 1) {
                           index++;
                           next = index + 1;
                       }
                       if (index < points.size() - 1) {
                           startPosition = points.get(index);
                           endPosition = points.get(next);
                       }

ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1);
                           valueAnimator.setDuration(3000);
                           valueAnimator.setInterpolator(new LinearInterpolator());
                           valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                               @Override
                               public void onAnimationUpdate(ValueAnimator valueAnimator) {
                                   v = valueAnimator.getAnimatedFraction();
                                   lng = v * endPosition.longitude + (1 - v)
                                           * startPosition.longitude;
                                   lat = v * endPosition.latitude + (1 - v)
                                           * startPosition.latitude;

                                   LatLng newPos = new LatLng(lat, lng);
                                   marker.setPosition(newPos);
                                   marker.setAnchor(0.5f, 0.5f);
                                   marker.setRotation(getBearing(startPosition, newPos));
                       mMap.moveCamera(CameraUpdateFactory
                               .newCameraPosition
                                       (new CameraPosition.Builder()
                                               .target(newPos)
                                               .zoom(15.5f)
                                               .build()));
                               }
                           });
                           valueAnimator.start();
                           mHandler.postDelayed(this, 3000);
                       }
                   }, 3000);

               Utilities.printV("DriverLocationResToCus", "DriverLocationResToCus SUCCESS");


           } else {

               Utilities.printV("DriverLocationResToCus", "DriverLocationResToCus FAILURE");

}
       }

       @Override
       public void onFailure(Call<DriverLocationResToCus> call, Throwable t) {

       }
   });

}


stackoverflow

Can anyone help me with this?
 
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Welcome to the Ranch

Don't know any Android myself, but thank you for informing us of the double posting; please also inform them on SO. You would find it easier to get more attention if you give your thread a more informative title and give us more explanation of the problem.
 
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