👀 Views: 1 💬 Answers: 1 📅 Created: 2025-08-21

android paging kotlin flow

I've been struggling with this for a few days now and could really use some help. I've searched everywhere and can't find a clear answer. Quick question that's been bugging me - I'm currently implementing pagination in my Android app using the Paging 3 library along with Kotlin Flows. However, I've been facing an issue where the UI does not update consistently when new data is being loaded. Sometimes, the RecyclerView does not reflect the new items until I manually scroll, or the loading indicators flicker unexpectedly. Here's a simplified version of my setup. I have a `ViewModel` that exposes a `Flow<PagingData<MyData>>` to the UI: ```kotlin class MyViewModel(private val repository: MyRepository) : ViewModel() { val pagedData: Flow<PagingData<MyData>> = repository.getPagedData() } ``` In my repository, I use a `Pager` to create the flow: ```kotlin class MyRepository(private val apiService: ApiService) { fun getPagedData(): Flow<PagingData<MyData>> { return Pager( config = PagingConfig(pageSize = 20), pagingSourceFactory = { MyPagingSource(apiService) } ).flow } } ``` And in my Fragment, I'm collecting the flow and submitting it to the adapter: ```kotlin class MyFragment : Fragment() { private val viewModel: MyViewModel by viewModels() private lateinit var adapter: MyAdapter override fun onViewCreated(view: View, savedInstanceState: Bundle?) { adapter = MyAdapter() binding.recyclerView.adapter = adapter lifecycleScope.launchWhenStarted { viewModel.pagedData.collectLatest { pagingData -> adapter.submitData(pagingData) } } } } ``` Despite following the documentation, the UI does not update smoothly when new data is loaded. I’ve tried adding `notifyDataSetChanged()` after `submitData()`, but it worsens the flickering. I suspect it might relate to how Paging 3 handles data updates, but I'm unsure how to approach this. Additionally, I'm using Android 14 and have noticed that the issue seems to be more pronounced on devices with lower performance specs. Any insights or suggestions on best practices for ensuring a smooth UI update experience with Paging 3 and Flow would be greatly appreciated! For context: I'm using Kotlin on Windows. For context: I'm using Kotlin on Windows 10. Am I missing something obvious?