为什么使用ArcGIS Runtime SDK for Android 对ShapeFile文件添加要素时报错？

mshapefileFeatureTable =new ShapefileFeatureTable(mShpPath); 

mFeatureLayer =new FeatureLayer(mshapefileFeatureTable); 

mFeatureLayer.setRenderer(renderer); mMapView.addLayer(mFeatureLayer);

//mGraphic是传进来的参数

mFeatureLayer.getFeatureTable().addFeature(mGraphic);//此位置报错





提示java.lang.UnsupportedOperationException: Shapefile editing is not supported

请问这是为什么呢？？

看了下 ArcGIS for Android 中的API，ShapeFileFeatureTable是不是对addfeature和deleteFeature不支持呀？？请牛人解答下