👀 Views: 15 💬 Answers: 1 📅 Created: 2025-07-27

android livedata viewmodel fragment kotlin

I'm not sure how to approach Quick question that's been bugging me - Hey everyone, I'm running into an issue that's driving me crazy... I'm working with an scenario where my LiveData doesn't seem to update my custom view bindings in Android 14. I have a ViewModel that exposes a LiveData object, which I observe in my fragment. The question occurs when I update the LiveData; the associated views don't reflect the changes. I've tried using both the `Observer` and `LifecycleOwner` methods to bind the data. Here’s a snippet of my ViewModel and Fragment code: ```kotlin class MyViewModel : ViewModel() { private val _data = MutableLiveData<String>() val data: LiveData<String> get() = _data fun updateData(newValue: String) { _data.value = newValue } } ``` ```kotlin class MyFragment : Fragment() { private lateinit var viewModel: MyViewModel override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { val view = inflater.inflate(R.layout.fragment_my, container, false) viewModel = ViewModelProvider(this).get(MyViewModel::class.java) viewModel.data.observe(viewLifecycleOwner, Observer { newData -> // Binding the data to a TextView view.findViewById<TextView>(R.id.myTextView).text = newData }) return view } } ``` The `updateData` method is called, but when I check the UI, the `TextView` does not reflect the new data. I've also logged the values coming from LiveData, and they appear to be correct when I call `updateData()`, but the view shows an unexpected null value instead. I've tried these steps: - Ensured the `TextView` is initialized after the view is created. - Used `viewLifecycleOwner` for observation to avoid memory leaks. - Added log statements to confirm that the observer is triggered. However, the TextView remains on its default state (initial value) and does not update. I'm not seeing any exceptions in Logcat, which makes it harder to debug. Has anyone else run into this scenario? Any suggestions on what might be causing this or how to resolve it? I'd really appreciate any guidance on this. Any pointers in the right direction? For context: I'm using Kotlin on Linux. Am I missing something obvious?