Unexpected NullPointerException when using ViewModel in Fragment with SavedStateHandle in Android 14
Quick question that's been bugging me - After trying multiple solutions online, I still can't figure this out..... I'm trying to implement I'm working with a `NullPointerException` when trying to access data from `SavedStateHandle` in my Fragment's `ViewModel`. The app crashes when I attempt to retrieve a value stored in the `SavedStateHandle` right after the Fragment is created. Here's a simplified version of my setup: ```kotlin class MyViewModel(private val state: SavedStateHandle) : ViewModel() { fun getValue(): String? { return state.get<String>("myKey") } fun setValue(value: String) { state.set("myKey", value) } } ``` In my Fragment, I'm using the following code to instantiate the ViewModel: ```kotlin class MyFragment : Fragment() { private val viewModel: MyViewModel by viewModels() override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { val view = inflater.inflate(R.layout.fragment_my, container, false) // Attempt to get the value immediately val value = viewModel.getValue() // This line throws NullPointerException return view } } ``` The scenario seems to stem from the fact that there are times when `myKey` hasn't been initialized yet in the `SavedStateHandle`. I've tried ensuring that `setValue` is called before accessing it, but this doesn't seem to fix the scenario. I've also checked that the `SavedStateHandle` is properly passed to the `ViewModel`. What could be causing this `NullPointerException`, and how can I safely access values from `SavedStateHandle` in my Fragment? I've tried adding null checks and logging but still need to figure out when the value becomes `null`. Any insights or best practices for working with `SavedStateHandle` in Fragments would be greatly appreciated. Thanks! For context: I'm using Kotlin on Windows 10. Am I missing something obvious? Has anyone else encountered this? I'm developing on Windows 10 with Kotlin. For context: I'm using Kotlin on Windows 10.