如何保存地图并使用ArcGIS Run-time for Android重新加载

如何解决如何保存地图并使用ArcGIS Run-time for Android重新加载

我将学习适用于android的Arcgis运行时SDK，并且可以通过示例文档成功显示地图，但是当我将形状文件导入地图时，我不知道如何保存该地图并加载它再次。

        ShapefileFeatureTable shapefileFeatureTable = new ShapefileFeatureTable(uri);

        shapefileFeatureTable.loadAsync();
        shapefileFeatureTable.addDoneLoadingListener(() -> {
            if (shapefileFeatureTable.getLoadStatus() == LoadStatus.LOADED) {

                // create a feature layer to display the shapefile
                FeatureLayer shapefileFeatureLayer = new FeatureLayer(shapefileFeatureTable);



                // add the feature layer to the map
                mMapView.getMap().getoperationalLayers().add(shapefileFeatureLayer);

                // zoom the map to the extent of the shapefile
                mMapView.setViewpointAsync(new Viewpoint(shapefileFeatureLayer.getFullExtent()));

            } else {
                String error = "Shapefile feature table Failed to load: " + shapefileFeatureTable.getLoadError().toString();
                Toast.makeText(SketcherActivity.this,error,Toast.LENGTH_LONG).show();
                //Log.e(TAG,error);
            }
        });

但是我没有找到任何保存ShapefileFeatureTable的帮助，有人可以给我一些帮助吗？