ArcGIS地图ServiceFeatureTable.QueryFeatureFields.LOAD_ALL无法正常运行

Question

我已在我的应用程序中实现了ArcGIS Runtime 100 Map SDK，但遇到了问题。

我一直试图在使用ServiceFeatureTable选择的功能中加载所有属性，但似乎无法正常工作。大多数情况下，它会将属性值返回为null。下面是代码，

    Geometry geometry = GeometryEngine.simplify(selectionGraphic.getGeometry());
    QueryParameters query = new QueryParameters();
    query.setGeometry(geometry);
    query.setOutSpatialReference(SpatialReferences.getWgs84());

    ListenableFuture<FeatureQueryResult> selectFuture = serviceFeatureTable.queryFeaturesAsync(query, ServiceFeatureTable.QueryFeatureFields.LOAD_ALL);

    selectFuture.addDoneListener(() -> {
        try {
            FeatureQueryResult features = selectFuture.get();
            selectableLayer.selectFeatures(features);

            selectFeatures(features);
        }
        catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
    });

有人可以帮我提供任何解决方案吗？