Google map issue for multicolor polyline

We are drawing polyline according to different zone colors (Different colors assigned to the different zone where the person is in) and the below issue, we are facing constantly. Is anyone know the solution?

Getting issue on line no 8: polyline.setPoints(points) where points contain array of lat/lng. eg:lat/lng: (34.282619,-119.149895) AlexMamo

 PolylineOptions options = new PolylineOptions();
            Polyline polyline = null;
            for (int i = 1; i < coloredPointArrayLit.size(); i++) {
                if (coloredPointArrayLit.get(i).color == coloredPointArrayLit.get(i - 1).color) {
                    if (polyline != null) {
                        List<LatLng> points = polyline.getPoints();
                        points.add(coloredPointArrayLit.get(i).coordinates);
                        polyline.setPoints(points);
                    } else {
                        options.add(coloredPointArrayLit.get(i - 1).coordinates);
                        options.add(coloredPointArrayLit.get(i).coordinates);
                        options.color(coloredPointArrayLit.get(i).color);
                        options.jointType(JointType.ROUND);
                        options.endCap(roundCap);
                        options.startCap(roundCap);
                        // Add the polyline to the map colored polyline
                        polyline = this.googleMap.addPolyline(options
                                .width(DensityTool.adjustToDensity(context, 7)));
                    }
                } else {
                    options = new PolylineOptions();
                    options.add(coloredPointArrayLit.get(i - 1).coordinates);
                    options.add(coloredPointArrayLit.get(i).coordinates);
                    polyline = null;
                }
            }

Any help will be appreciated.