[Android] Error inflating class androidx.fragment.app.FragmentContainerView

Google Map을 띄우려고 FragmentContainerView 를 쓰던 중 발견한 버그이다.

//MainActivity.kt

class MainActivity : AppCompatActivity(), OnMapReadyCallback {
    private lateinit var binding:ActivityMainBinding
    private lateinit var map: GoogleMap
  
    override fun onCreate(savedInstanceState: Bundle?) {
        binding = ActivityMainBinding.inflate(layoutInflater)
        super.onCreate(savedInstanceState)
        setContentView(binding.root)

        val mapFragment = supportFragmentManager.findFragmentById(binding.mapView) as SupportMapFragment
        mapFragment.getMapAsync(this)

    }

    override fun onMapReady(googleMap: GoogleMap) {
        map = googleMap
        val marker = LatLng(37.295881, 126.975931)
        map.addMarker(MarkerOptions().position(marker).title("MAP"))
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(marker, 10F))
    }

...
    
}

//activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.5" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline2">

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/mapView"
            android:name="com.google.android.gms.maps.SupportMapFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            />
    </LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

에러 내용:

Caused by: android.view.InflateException: Binary XML file line #69 in packageName:layout/activity_main: 
  Binary XML file line #69 in packageName:layout/activity_main: 
  Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: android.view.InflateException: Binary XML file line #69 in packageName:layout/activity_main: 
  Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: java.lang.NullPointerException: 
  Attempt to invoke virtual method 'android.content.Context androidx.fragment.app.FragmentHostCallback.getContext()' on a null object reference
  at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:483)

inflate 에러라고 하여 FragmentContainerView 사용에 문제가 있나 싶었지만, 원인은 Viewbinding에 있었다.

//MainActivity.kt

class MainActivity : AppCompatActivity(), OnMapReadyCallback {
    private lateinit var map: GoogleMap
  
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

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

    }

    override fun onMapReady(googleMap: GoogleMap) {
        map = googleMap
        val marker = LatLng(37.295881, 126.975931)
        map.addMarker(MarkerOptions().position(marker).title("MAP"))
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(marker, 10F))
    }

...
    
}

viewbinding을 제거하면 에러가 해결된다.