launch fragment with fragment factory

MainActivity.kt

class MainActivity: FragmentInjectActivity() {
    @Inject lateinit var fragmentFactory: FragmentFactory

    override fun onCreate(savedInstanceState: Bundle?) {
        supportFragmentManager.fragmentFactory = fragmentFactory
        super.onCreate(savedInstanceState)
        // launch fragment and add to fragmen container view
        supportFragmentManager.beginTransaction()
            .add<DummyFragment>(R.id.fragmentContainer)
            .commit()
    }
}