Android

Question

我也尝试使用Polygon进行自定义TileProvider。但是，我不知道我是否采取了正确的方式。事实上，我使用getTileUrl得到了我的Polygon：

TileProvider tileProvider = new UrlTileProvider(256, 256) {

    @Override
    public synchronized URL getTileUrl(int x, int y, int zoom) {

        int reversedY = (1 << zoom) - y - 1;

        tt = true;

        x_tile=x;
        y_tile=reversedY;
        z_tile=zoom;


        Observable<Algorithm> algorithmObs = Observable.from(algorithm);
        Observable<List<Tuple<org.geojson.Polygon, Integer>>> geometriesObs = Observable
                .from(algorithm)
                .concatMap(algo -> algorithmService.getLatestVectorizedData(algorithm.getParcelle().getIndex(), algorithm.getIndex()))
                .map(VectorizedDataDto::getIndex)
                .concatMap(id -> algorithmService.getTiledVectorizedGeometries(algorithm.getIdAnalysedData(), 4,zoom,x,reversedY))
                .map(VectorizedGeometriesDto::geometriesWithColor);

        Observable
                .zip(algorithmObs, geometriesObs, Tuple::new)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(this::onSuccessGetVectorizedGeometrie);


        return null;
    }

    private void onSuccessGetVectorizedGeometrie(Tuple<Algorithm, List<Tuple<org.geojson.Polygon, Integer>>> tuple) {
        Algorithm algorithm = tuple.x;
        List<Tuple<org.geojson.Polygon, Integer>> geometriesWithColor = tuple.y;

        //algorithm.setParcelle(currentParcelle);

        algorithm.setPolygonsWithColor(geometriesWithColor);

        algorithm.setX_tile(x_tile);
        algorithm.setY_tile(y_tile);
        algorithm.setZ_tile(z_tile);
        algorithm.setPolygon(geometriesWithColor.toString());
        algorithm.save();


        showTiledPolygon();
    }

    public void showTiledPolygon(){

        for (Tuple<org.geojson.Polygon, Integer> algorithmPolygonWithColor : algorithm.getPolygonsWithColor()) {
            polygon = googleMap
                    .addPolygon(new PolygonOptions()
                                    .addAll(PolygonHelper.getBorder(algorithmPolygonWithColor.x))
                                    .fillColor(algorithmPolygonWithColor.y)
                                    .strokeColor(0xff000000)
                                    .strokeWidth(3)
                            //.strokeColor(algorithmPolygonWithColor.y)
                            //.strokeWidth(0)
                    );

            algorithmPolygons.add(polygon);

        }

        mapProgress.setVisibility(View.INVISIBLE);


    }

};

它有效，但我不喜欢我的方法，因为没有缓存，所以我必须删除所有多边形并在每次缩放事件时调用它们。

对于具有多边形的自定义切片提供程序，是否有更好的方法？

非常感谢！