Adding Polylines to a Google Map

AddPolylinesToMap.java

  private void addPolylinesToMap(final DirectionsResult result){
      new Handler(Looper.getMainLooper()).post(new Runnable() {
          @Override
          public void run() {
              Log.d(TAG, "run: result routes: " + result.routes.length);

              for(DirectionsRoute route: result.routes){
                  Log.d(TAG, "run: leg: " + route.legs[0].toString());
                  List<com.google.maps.model.LatLng> decodedPath = PolylineEncoding.decode(route.overviewPolyline.getEncodedPath());

                  List<LatLng> newDecodedPath = new ArrayList<>();

                  // This loops through all the LatLng coordinates of ONE polyline.
                  for(com.google.maps.model.LatLng latLng: decodedPath){

//                        Log.d(TAG, "run: latlng: " + latLng.toString());

                      newDecodedPath.add(new LatLng(
                              latLng.lat,
                              latLng.lng
                      ));
                  }
                  Polyline polyline = mGoogleMap.addPolyline(new PolylineOptions().addAll(newDecodedPath));
                  polyline.setColor(ContextCompat.getColor(getActivity(), R.color.darkGrey));
                  polyline.setClickable(true);

              }
          }
      });
  }