Question

我正在使用adding the marker to the map style as a new layer

的推荐方式添加标记

    List<Feature> symbolLayerIconFeatureList .....

    @Override
    public void onMapReady(@NonNull final MapboxMap mapboxMap) {

        symbolLayerIconFeatureList = new ArrayList<>();
        symbolLayerIconFeatureList.add(Feature.fromGeometry(
                Point.fromLngLat(-57.225365, -33.213144)));
        symbolLayerIconFeatureList.add(Feature.fromGeometry(
                Point.fromLngLat(-54.14164, -33.981818)));
        symbolLayerIconFeatureList.add(Feature.fromGeometry(
                Point.fromLngLat(-56.990533, -30.583266)));

        mapboxMap.setStyle(new Style.Builder().fromUri("mapbox://styles/mapbox/cjf4m44iw0uza2spb3q0a7s41")

        // Add the SymbolLayer icon image to the map style
                .withImage(ICON_ID, BitmapFactory.decodeResource(
                        MainActivity.this.getResources(), R.drawable.red_marker))

        // Adding a GeoJson source for the SymbolLayer icons.
                .withSource(new GeoJsonSource(SOURCE_ID,
                        FeatureCollection.fromFeatures(symbolLayerIconFeatureList)))

        // Adding the actual SymbolLayer to the map style. An offset is added that the bottom of the red
        // marker icon gets fixed to the coordinate, rather than the middle of the icon being fixed to
        // the coordinate point. This is offset is not always needed and is dependent on the image
        // that you use for the SymbolLayer icon.
                .withLayer(new SymbolLayer(LAYER_ID, SOURCE_ID)
                        .withProperties(PropertyFactory.iconImage(ICON_ID),
                                iconAllowOverlap(true),
                                iconOffset(new Float[]{0f, -9f}))
                ), new Style.OnStyleLoaded() {
            @Override
            public void onStyleLoaded(@NonNull Style style) {

        // Map is set up and the style has loaded. Now you can add additional data or make other map adjustments.


            }
        });
    }

我想在运行时随意添加或删除其中一个标记，我们假设这是在api调用之后进行的。我已经尝试过了：

 markerCoordinates.remove(Feature.fromGeometry(
                        Point.fromLngLat(-57.225365, -33.213144)));
 mapView.invalidate();

但是它不起作用。其他选项建议我删除该层，但没有用。有什么建议吗？

Answer 1

只需几个步骤即可完成

：

使用GeoJsonSource source = mapboxMap.getSourceAs(SOURCE_ID);
通过添加或删除所需的任何功能来更新功能列表symbolLayerIconFeatureList。
为您的source提供新功能列表source.setGeoJson(FeatureCollection.fromFeatures(symbolLayerIconFeatureList));

你很好。

Answer 2

您可以通过sourceId删除标记。例如：-mapStyle.removeSource(sourceId)

如何使用MAPBOX android SDK添加/删除标记

2 个答案: