Calling refresh() method twice, stops the pagination. #223
Description
I'm able to populate the list and pagination is working as expected. But when I call adapter.refresh() method twice by using pull to refresh, the pagination stops working.
Please refer the below video to get the better idea about the prolem.
https://www.dropbox.com/s/0k2g9mlktv5gee6/22-05-22-10-26-37.mp4?dl=0
VideoPagingSource.kt
class VideoPagingSource(
private val apiInterface: ApiInterface,
private val schoolId: String,
private val ordering: String?,
private val courseId: String?,
private val moduleId: String?,
private val searchText: String?
) : PagingSource<Int, Video>() {
override fun getRefreshKey(state: PagingState<Int, Video>): Int? = null
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Video> {
val pageNumber = params.key
return try {
val response = apiInterface.getVideos(schoolId, ordering, courseId, moduleId, searchText, pageNumber)
val pagedResponse = response?.body()
var nextPageNumber: Int? = null
if (pagedResponse?.links?.next != null) {
val uri = Uri.parse(pagedResponse.links.next)
val nextPageQuery = uri.getQueryParameter("page")
nextPageNumber = nextPageQuery?.toInt()
}
LoadResult.Page(
data = response?.body()?.objects.orEmpty(),
prevKey = null,
nextKey = nextPageNumber
)
} catch (e: Exception) {
LoadResult.Error(e)
}
}
}
PreClassViewModel.kt
class PreClassViewModel @Inject constructor(private val repository: PreClassRepository) :
ViewModel() {
private val queryParamLiveData = MutableLiveData<QueryParams>()
val videosLiveData = queryParamLiveData.switchMap {
repository.getVideos(
schoolId = it.extraArgs[0],
ordering = it.extraArgs[1],
courseId = it.courseId,
moduleId = it.chapterId,
searchText = it.searchText
).cachedIn(viewModelScope)
}
fun setQueryParam(queryParams: QueryParams){
queryParamLiveData.value = queryParams
}
}
VideosFragment.kt
class VideosFragment : BaseFragment<FragmentVideosBinding>(FragmentVideosBinding::inflate),
VideosPagingAdapter.VideoClickListener {
private val viewModel by viewModels<PreClassViewModel>()
private var chapter: ModulesItem? = null
private var courseId: String? = null
private var adapter: VideosPagingAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
chapter = Gson().fromJson(arguments?.getString(BUNDLE_CHAPTER), ModulesItem::class.java)
courseId = arguments?.getString(BUNDLE_COURSE_ID)
viewModel.setQueryParam(
QueryParams(
courseId = courseId,
chapterId = chapter?.id.toString(),
searchText = null,
me?.academicProfile?.school?.id?.toString()!!,
"sequence",
)
)
}
override fun initView() {
getMainActivity().showBothNavigation()
getMainActivity().showBackButton()
adapter = VideosPagingAdapter(chapter?.imageUrl, this)
binding.videoRV.adapter = adapter!!.withLoadStateFooter(footer = DefaultFooterAdapter())
lifecycleScope.launch {
adapter?.loadStateFlow?.collectLatest {
binding.progressBar.isVisible = it.refresh is LoadState.Loading
if (binding.swipeContainer.isRefreshing){
binding.swipeContainer.isRefreshing = it.refresh is LoadState.Loading
}
}
}
}
override fun initListener() {
binding.swipeContainer.setOnRefreshListener {
adapter?.refresh()
}
}
override fun addObserver() {
viewModel.videosLiveData.observe(viewLifecycleOwner) {
adapter?.submitData(viewLifecycleOwner.lifecycle, it)
}
}
override var setSelection: String
get() = Constants.FEATURE_LEARN
set(value) {}
override fun onVideoClick(video: Video) {
}
}