public static PolygonOptions combineIntoOneGeometry(List<PolygonOptions> polygonOptionses )
{
    PolygonOptions polygonOptions = new PolygonOptions();
    GeometryFactory factory = new GeometryFactory();

    List<Geometry> geometryList = new ArrayList<>();
    for( int i = 0; i < polygonOptionses.size(); i++)
    {
        List<LatLng> latLngList = polygonOptionses.get(i).getPoints();
        Coordinate[] coords  = new Coordinate[latLngList.size()];
        for( int j = 0; j < latLngList.size();j++)
        {
            coords[j] = new Coordinate(latLngList.get(j).latitude, latLngList.get(j).longitude);

        }
        coords[coords.length - 1] = coords[0];
        LinearRing ring = factory.createLinearRing( coords );
        LinearRing holes[] = null; // use LinearRing[] to represent holes
        com.vividsolutions.jts.geom.Polygon polygon = factory.createPolygon(ring, holes );

        geometryList.add(polygon);
    }

    Geometry polygonMain = geometryList.get(0);
    for(int i = 1; i < geometryList.size(); i++)
    {
        Geometry geoAux = polygonMain.union(geometryList.get(i));
        polygonMain = geoAux;
    }

    Coordinate[] coordinates = polygonMain.getCoordinates();
    List<LatLng> points = new ArrayList<>();
    for( int i = 0; i < coordinates.length; i++ )
    {
        points.add(i, new LatLng(coordinates[i].x, coordinates[i].y));
    }
    polygonOptions.addAll(points);

    return polygonOptions;
}