Unexpected NullPointerException in Android 14 when using LiveData with ViewModel and Fragment
I've hit a wall trying to After trying multiple solutions online, I still can't figure this out. I'm working with a `NullPointerException` when trying to observe a `LiveData` object from my `ViewModel` in a `Fragment` on Android 14. The specific behavior occurs when I attempt to update the UI in the observer callback. Here’s a simplified version of my code: ```kotlin class MyViewModel : ViewModel() { private val _myData = MutableLiveData<String>() val myData: LiveData<String> get() = _myData fun fetchData() { // Simulating data fetch delay(1000) _myData.postValue("Hello, World!") } } class MyFragment : Fragment() { private lateinit var viewModel: MyViewModel override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { return inflater.inflate(R.layout.fragment_my, container, false) } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) viewModel = ViewModelProvider(this).get(MyViewModel::class.java) viewModel.myData.observe(viewLifecycleOwner, Observer { data -> // This throws NullPointerException textView.text = data }) viewModel.fetchData() } } ``` The behavior log shows a `NullPointerException` at the line where I try to set `textView.text = data`. I’ve confirmed that `textView` is initialized properly in the `onCreateView`, so I’m puzzled as to why it’s null at this point. I’ve also tried using `viewLifecycleOwner` to observe the `LiveData`, but the scenario continues. I’ve ensured that the `Fragment` is properly attached when the observer is triggered, and I’ve also checked that the `ViewModel` is not being recreated unnecessarily. Could this be a lifecycle-related scenario, or am I missing something in the way I’m observing the data? Any insights would be appreciated! For context: I'm using Kotlin on Linux. What am I doing wrong? For context: I'm using Kotlin on Ubuntu. What's the best practice here? This is for a REST API running on Debian.