arcgis大概如下:
GraphicsLayer graphicsLayer = new GraphicsLayer();
mapView.addLayer(graphicsLayer);
Point loc= new Point(120.8664698600769,36.14800174970085); //获取的定位
SpatialReference sr4326 = SpatialReference.create(SpatialReference.WKID_WGS84);
Point p = (Point)GeometryEngine.project(loc, sr4326, mapView.getSpatialReference()); //转为地图坐标