导航抽屉中未调用Kotlin onMapReady

Question

我在导航抽屉中有一个google map视图，但是尽管我正在呼叫onMapReady，但并未呼叫getMapAsync。

创建时

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_side_menu)
    val toolbar: Toolbar = findViewById(R.id.toolbar)
    setSupportActionBar(toolbar)

    val mapFragment = supportFragmentManager.findFragmentById(R.id.map) as? SupportMapFragment
    mapFragment?.getMapAsync(this)

    val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
    val navView: NavigationView = findViewById(R.id.nav_view)
    val navController = findNavController(R.id.nav_host_fragment)
    // Passing each menu ID as a set of Ids because each
    // menu should be considered as top level destinations.
    appBarConfiguration = AppBarConfiguration(
        setOf(
            R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow,
            R.id.nav_tools, R.id.nav_share, R.id.nav_send
        ), drawerLayout
    )
    setupActionBarWithNavController(navController, appBarConfiguration)
    navView.setupWithNavController(navController)

    fusedLocationClient = LocationServices.getFusedLocationProviderClient(this)

    checkIfUserIsAuthenicated()
}

片段

<?xml version="1.0" encoding="utf-8"?>
<fragment  xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SideMenuActivity">


</fragment>