MapFragment.kt

package com.example.androidfinalproject

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.LatLngBounds
import com.google.android.gms.maps.model.MarkerOptions






class MapFragment : Fragment(), OnMapReadyCallback {

    private lateinit var mMap: GoogleMap


    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_map, container, false)
        var mapFragment : SupportMapFragment?=null
        mapFragment = requireFragmentManager().findFragmentById(R.id.maps) as SupportMapFragment?
        mapFragment?.getMapAsync(this)



        return view

    }

    override fun onMapReady(gMap: GoogleMap) {
        mMap = gMap

        // Add a marker in Sydney and move the camera
        val sydney = LatLng(-34.0, 151.0)
        mMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney"))
        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney))

    }

}