How to reset/clear Android PaginData object and it's adapter?

Question

I'm using a PagingData inside a ViwModel with a Flow object. It's working correctly, but my problems is that, a certain point I need to reset/clear it to request new data.

I've tried different methods the objects has, but I haven't been able to do it. So, how can I achieve it?

Int he ViewModel

lateinit var items: Flow<PagingData<MyItem>>
    private set

private fun initItemsFlow() {
     items = repository.getItemsData().map { pagingData ->
        pagingData.map { it }
    }.cachedIn(viewModelScope)
}

This is the repository function:

fun getItemsData(): Flow<PagingData<MyItem>> = Pager(
    PagingConfig(pageSize = 10, enablePlaceholders = false, prefetchDistance = 5)
) {
    ItemsPagingSource()
}.flow

And finally, this is how I listen to it in the view

lifecycleScope.launchWhenStarted {
    viewModel
        .items
        .collect {
            iAdapter.submitData(it)
        }
}

Thanks!

Answer 1

I don't know if it's the best solution, but I ended up creating a new PagingData flow when I need to "clear/reset" the list. I have opted for this solution since I didn't find any method to reset the request to the data source.

So, in the fragment:

fun onResetList() {
    viewModel.onResetList()
    lifecycleScope.launch { 
        viewModel
            .items
            .collect {
                itemsAdapter.submitData(it)
            }
    }
}

And, in the ViewModel I just recreate the flow object:

fun onResetList() {
items = repository.getItemsData().map { pagingData ->
        pagingData.map { it }
    }.cachedIn(viewModelScope)
}