Add a Polygon

To add a polygon on map, check out this code

import 'package:flutter/material.dart';
import 'package:maplibre_gl/mapbox_gl.dart';

class FillMap extends StatefulWidget{
  @override
  State<FillMap> createState() => _FillMapState();
}

class _FillMapState extends State<FillMap>{
  CameraPosition initialPosition= CameraPosition(target: LatLng(23.835677, 90.380325), zoom: 12);   //CameraPosition object for initial location in map
  MaplibreMapController? mController;

  static const styleId = 'osm-liberty' ;    //barikoi map style id
  static const apiKey=BARIKOI_API_KEY;   //barikoi API key, get it from https://developer.barikoi.com
  static const mapUrl= 'https://map.barikoi.com/styles/$styleId/style.json?key=$apiKey';
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: MaplibreMap(
        initialCameraPosition: initialPosition,   // set map initial location where map will show first
        onMapCreated: (MaplibreMapController mapController){  //called when map object is created
          mController= mapController;   // use the MaplibreMapController for map operations
        },
        styleString: mapUrl , // barikoi map style url
        onStyleLoadedCallback: (){
          //add polygon to map
          mController?.addFill(
              const FillOptions(
                geometry: [   //geometry of the polygon , in <List<List<LatLng>>> format
                  [
                    LatLng(23.85574361143307, 90.38354443076582),
                    LatLng(23.823632508626005,90.40521296373265),
                    LatLng(23.82639837105691,90.42285014172887),
                    LatLng(23.86204198543561,90.40050971626783)
                  ]
                ],
                fillColor: "#FF0000",
                fillOutlineColor: "#FFFFFF",
                fillOpacity: 0.5,
                draggable: true
              ),
          );
          //add Fill tap event listener
          mController?.onFillTapped.add(_OnFillTapped);
        }
      ),
    );
  }

  void _OnFillTapped(Fill argument) {
    // implement polygon fill tap event here
  }
}