导航组件不会从阻止屏幕的通知中导航

Question

我正在接收来自Firebase的通知，如果在前台或后台收到通知，它可以正确导航。但是，如果我从阻止屏幕上点击通知，则它不起作用。我认为问题出在找不到navController。但是不知道该怎么办

 class MainActivity : AppCompatActivity() {
   override fun onCreate(savedInstanceState: Bundle?) {
    setTheme(R.style.MainTheme)
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main2)
    mainviewModel.navigateToMainFragmentEvent.observe(this, EventObserver {
      Log.d("A","notification")`
            Navigation.findNavController(this, R.id.nav_host_fragment)
                .navigate(R.id.action_global_mainFragment)
    })
  }
}

SplashFragment是homeFragment

class SplashFragment : Fragment(R.layout.activity_splash) {
val splashViewModel: SplashViewModel by sharedViewModel()
  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
      getStringExtra(NOTIFICATION_TYPE)?.let {
        splashViewModel.notificationRecived(it)
      }
  }
}

当我调试此代码时：

  Navigation.findNavController(this, R.id.nav_host_fragment)

IllegalStateException：ID未引用此活动内的视图