Fragment not retaining ViewModel state during configuration changes in Android Studio
I'm writing unit tests and I'm testing a new approach and I'm working on an Android application using Android Studio 2023.1.1 and I've implemented a ViewModel for my Fragment, but I'm facing an issue where the ViewModel state is not retained during configuration changes like screen rotation. I believe I'm following the best practices for ViewModel usage, but the data seems to reset every time I rotate the screen. Here’s a snippet of my Fragment where I initialize the ViewModel: ```kotlin 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?) { viewModel = ViewModelProvider(this).get(MyViewModel::class.java) viewModel.someLiveData.observe(viewLifecycleOwner, Observer { data -> // Update UI with data }) } } ``` In my ViewModel, I have a LiveData property: ```kotlin class MyViewModel : ViewModel() { private val _someLiveData = MutableLiveData<String>() val someLiveData: LiveData<String> get() = _someLiveData init { _someLiveData.value = "Initial Data" } } ``` After rotating the screen, `someLiveData` resets to `null` instead of retaining the "Initial Data" value. I've also tried using `setRetainInstance(true)` in the Fragment, but it seems to have no effect. I've verified that my Fragment is not being recreated unnecessarily by logging its lifecycle methods, and it appears to be getting re-initialized. I'm using Jetpack components, and there are no issues with the dependencies in `build.gradle`: ```groovy dependencies { implementation 'androidx.fragment:fragment-ktx:1.5.0' implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1' } ``` Is there something I'm missing in terms of retaining the ViewModel state, or should I be handling configuration changes differently? Any help would be greatly appreciated! I recently upgraded to Kotlin 3.9. This is happening in both development and production on Ubuntu 22.04. I appreciate any insights!