osmbonuspack 中的 FolderOverlay 如何从 JSON 获取样式？

Question

我在我的项目中使用osmbonuspack。传入的 GeoJson 具有字段 "style":

{"type":"FeatureCollection",
"features":
    [{"type":"Feature",
      "geometry":{
          "coordinates":[[.......]],
          "type":"Polygon"},
      "properties":{"id":1433861787198,
      "monitoring_in":false,
      "emergency_message_in":false,
      "monitoring_out":false,
      "emergency_message_out":false,
      "send_notification":false,
      "style":{"stroke":true,
           "color":"#0033ff",
           "weight":5.0,
           "opacity":0.5,
           "fill":true,
           "fillOpacity":0.2,
           "clickable":true}}}

但是当我把它放在地图上时所有数字都是黑色的（没有样式或默认样式）

        KmlDocument kmlDocument = new KmlDocument();

        kmlDocument.parseGeoJSON(str);

        FolderOverlay kmlOverlay = (FolderOverlay) kmlDocument.mKmlRoot.buildOverlay(mMapView, null, null, kmlDocument);

        mMapView.getOverlays().add(kmlOverlay);

        mMapView.invalidate();

Answer 1

我找到了解决方案。现在只针对多边形，我在文件中没有其他对象。

private void showGeoJsonObjects(String str){

    KmlDocument kmlDocument = new KmlDocument();

    kmlDocument.parseGeoJSON(str);

    //Add styler
    KmlFeature.Styler styler = new MyKmlStyler();

    FolderOverlay kmlOverlay = (FolderOverlay) kmlDocument.mKmlRoot.buildOverlay(mMapView, null, styler, kmlDocument);

    mMapView.getOverlays().add(kmlOverlay);

    mMapView.invalidate();
}


class MyKmlStyler implements KmlFeature.Styler {
    @Override
    public void onFeature(Overlay overlay, KmlFeature kmlFeature) {

    }

    @Override
    public void onPoint(Marker marker, KmlPlacemark kmlPlacemark, KmlPoint kmlPoint) {

    }

    @Override
    public void onLineString(Polyline polyline, KmlPlacemark kmlPlacemark, KmlLineString kmlLineString) {

    }

    @Override
    public void onPolygon(Polygon polygon, KmlPlacemark kmlPlacemark, KmlPolygon kmlPolygon) {
        try {
            String styleString = kmlPlacemark.getExtendedData("style");
            JSONObject o = new JSONObject(styleString);
            if(o.getBoolean("stroke")) {
                String colorHash = "#"+Integer.toHexString((int)(o.getDouble("opacity")*255))+o.getString("color").replace("#","");
                polygon.setStrokeColor(Color.parseColor(colorHash));
                polygon.setStrokeWidth((float) o.getDouble("weight"));
            }
            if(o.getBoolean("fill")){
                String colorHash = "#"+Integer.toHexString((int)(o.getDouble("fillOpacity")*255))+o.getString("color").replace("#","");
                polygon.setFillColor(Color.parseColor(colorHash));
            }
        }catch (Exception e){}

    }
}

osmbonuspack 中的 FolderOverlay 如何从 JSON 获取样式？

How say FolderOverlay in osmbonuspack to take style from JSON?

android

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