Having problems getting the Googe Map Fragment call the onMapReady

Issue

So the issue that I'm having is that i'm not sure how to access the map to set the initial location. The Fragment is always coming back NULL so it seems not to call the getMapReady function. I'm just not sure how to correctly reference the map widget in the layout so it will call the setUp for the map correctly.

THE LAYOUT

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.user.thisweekintown.CalendarFragment">



    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/mySwipe"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/bus_list_recycle"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scrollbars="horizontal" />
    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <fragment
        android:id="@+id/businessslocation"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginBottom="15dp"

        android:background="@color/cardview_light_background"/>
</FrameLayout>

The CODE

class BusListFragment : Fragment(),OnMapReadyCallback {
    lateinit var mMap: GoogleMap
    var mapView: SupportMapFragment? = null
    var totaladd:String? = null
.........

AND THEN

 override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {

        val view : View = inflater.inflate(R.layout.fragment_bus_list,container,false)
        var social_recycle: RecyclerView = view.findViewById(R.id.bus_list_recycle)

        Log.d("should be calling", "onMapReady")

        swipey = view.findViewById(R.id.mySwipe)
        swipey.setColorSchemeColors(Color.RED, Color.BLUE, Color.GREEN, Color.CYAN);

        swipey.setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener { setupRecycle(true) })
        calFrPrefs = context?.getSharedPreferences("main_prefs",0)

        (activity as MainActivity).getSupportActionBar()?.setTitle(calFrPrefs!!.getString("current_town_name","No Town")+ " Businesses")
        setupRecycle(false)
        return view

    }

AND THEN

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        mapView = childFragmentManager.findFragmentById(R.id.businessslocation) as? SupportMapFragment
        Log.d("isMapView", mapView.toString())

        mapView?.getMapAsync(this)

    }

It should call the following

override fun onMapReady(googleMap: GoogleMap){
        mMap = googleMap
        Log.d("onMapready", "MapReady")
        val cphbusiness = LatLng(42.187, 71.3065)
        mMap.addMarker(MarkerOptions().position(cphbusiness).title("Her"))
        mMap.moveCamera(CameraUpdateFactory.zoomTo(16.0F))
        mMap.moveCamera(CameraUpdateFactory.newLatLng(cphbusiness))

        val geocoder = Geocoder(context)
        if (geocoder is Geocoder) {
            var list: List<Address> = geocoder.getFromLocationName(totaladd, 1)
            if(list.size >0) {
                var mAddress: Address = list.get(0)
                Log.d("latitiude", mAddress.latitude.toString())
                Log.d("latitiude", mAddress.longitude.toString())
                var address1 = LatLng(mAddress.latitude, mAddress.longitude)
                changeMap(address1)
            }else
            {
                Toast.makeText(context, "Unable to find Valid Location...Centering on Random place", Toast.LENGTH_LONG).show()
                changeMap(cphbusiness)
            }
        } else {

        }

    }


    fun changeMap(myLL: LatLng) {
        mMap.moveCamera(CameraUpdateFactory.newLatLng(myLL))
        mMap.addMarker(MarkerOptions().position(myLL))

    }

Solution

Finally I resolve this issue by changing fragments name from android:name="com.google.android.gms.maps.MapFragment" to android:name="com.google.android.gms.maps.SupportMapFragment"

Answered By - Marat Zangiev