👀 Views: 43 💬 Answers: 1 📅 Created: 2025-06-15

android jetpack-compose viewmodel kotlin

I'm having trouble with I'm experimenting with I tried several approaches but none seem to work... I'm currently facing an issue where my UI isn't updating correctly after navigating between screens in an Android app. I'm using Jetpack Compose alongside the ViewModel architecture component, and I'm relying on LiveData for state management. After I navigate to a new screen, the observable data doesn't seem to trigger a recomposition in the UI as expected. Here's a simplified version of my setup: In my ViewModel, I have: ```kotlin class MyViewModel : ViewModel() { private val _data = MutableLiveData<String>() val data: LiveData<String> = _data fun updateData(newData: String) { _data.value = newData } } ``` In my Composable function, I'm collecting this LiveData: ```kotlin @Composable fun MyScreen(viewModel: MyViewModel) { val data by viewModel.data.observeAsState("Initial data") Text(text = data) } ``` I also have a button that updates the data and navigates to a different Composable: ```kotlin @Composable fun UpdateAndNavigate(viewModel: MyViewModel, navController: NavController) { Button(onClick = { viewModel.updateData("New data") navController.navigate("nextScreen") }) { Text(text = "Update and Navigate") } } ``` However, after the button is pressed and the navigation happens, the Text in `MyScreen` still shows "Initial data" instead of reflecting the updated value. I tried using `LaunchedEffect` to trigger the update directly after navigation, but that didn't change the behavior. The logs show that the update method is being called, but the UI isn't reflecting the new state. I verified that the LiveData is properly observed, and I've ensured that the Composable function is recomposed. I also checked the navigation graph and there are no issues there. Is there something I'm missing in the state flow or navigation handling that would prevent the UI from updating properly? Any help would be appreciated! Has anyone else encountered this? I'm working on a microservice that needs to handle this. How would you solve this? I'm coming from a different tech stack and learning Kotlin. Am I approaching this the right way?