Add polygon

Check out this code to add polygon to the map from polygon points

import android.graphics.Color
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.mapbox.mapboxsdk.Mapbox
import com.mapbox.mapboxsdk.annotations.PolygonOptions
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory
import com.mapbox.mapboxsdk.geometry.LatLng
import com.mapbox.mapboxsdk.geometry.LatLngBounds
import com.mapbox.mapboxsdk.maps.MapView
import com.mapbox.mapboxsdk.maps.MapboxMap

class PolygonMapActivity : AppCompatActivity() {
    private lateinit   var map: MapboxMap
    private lateinit var mapView: MapView
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        Mapbox.getInstance(this)
        setContentView(R.layout.activity_add_map)


        //map style name for style link
        val styleId = "osm-liberty"

        // get the api key from barikoi developer panel https://developer.barikoi.com
        val apiKey = getString(R.string.barikoi_api_key)

        // Build the style URL
        val styleUrl = "https://map.barikoi.com/styles/$styleId/style.json?key=$apiKey"

        //points list for the polygon
        val polygonpoints: ArrayList<LatLng> = ArrayList()
        polygonpoints.add(LatLng(23.85574361143307, 90.38354443076582))
        polygonpoints.add(LatLng(23.823632508626005,90.40521296373265,))
        polygonpoints.add(LatLng(23.82639837105691,90.42285014172887))
        polygonpoints.add(LatLng(23.86204198543561,90.40050971626783))

        // Create map view
        mapView= findViewById(R.id.mapView)
        mapView.onCreate(savedInstanceState)
        mapView.getMapAsync { map ->
            this.map =map

            // Set the style after mapView was loaded
            map.setStyle(styleUrl){ style->
                //after style loaded, then add polygon to map
                val polygon = map.addPolygon(PolygonOptions()
                    .addAll(polygonpoints)  //add all points for the polygon
                    .fillColor(Color.parseColor("#ccebb9")) // you can add fill color and stroke of the polygon from hex string
                    .strokeColor(Color.parseColor("#080808"))
                    .alpha(0.3F) // add transparency to the polygon fill color by setting alpha value from 0.0 to 1.0
                )

                //focus map on the polygon
                map.moveCamera( CameraUpdateFactory.newLatLngBounds( LatLngBounds.fromLatLngs(polygon.points), 50))

            }


        }
    }

    override fun onStart() {
        super.onStart()
        mapView.onStart()
    }

    override fun onResume() {
        super.onResume()
        mapView.onResume()
    }

    override fun onPause() {
        super.onPause()
        mapView.onPause()
    }

    override fun onStop() {
        super.onStop()
        mapView.onStop()
    }

    override fun onLowMemory() {
        super.onLowMemory()
        mapView.onLowMemory()
    }

    override fun onDestroy() {
        super.onDestroy()
        mapView.onDestroy()
    }


}