带地图的Kotlin（标记未显示）

Question

Hello I'm trying to implements Google Maps in kotlin, but in these code my getMapAsync is not getting called, the maps shows perfectly but the marker doesn't show up

    var mapFragment : SupportMapFragment?=null
    mapFragment= fragmentManager.findFragmentById(R.id.map) as SupportMapFragment?
    mapFragment?.getMapAsync { 
        val sydney = LatLng(22.30, 73.20)
        mMap!!.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney"))
        mMap!!.moveCamera(CameraUpdateFactory.newLatLng(sydney))


        Toast.makeText(activity,"dfgdg",Toast.LENGTH_LONG).show() }

Answer 1

1. You are using the wrong map instance.
2. Sydney lat lng are -33.8479731,150.6517908

 mapFragment?.getMapAsync { map -> // <- this is the map that you got async not mMap val sydney = LatLng(-33.8479731, 150.6517908) map.addMarker(... map.moveCamera(... }