I have the following code, but I don't think the pagination is implemented.
dao
interface IArticleDao {
@Query(
"""
SELECT * FROM t_article ORDER BY :order DESC
"""
)
fun pagingSource(order: String): PagingSource<Int, Article>
}
Repository
class ArticleRepository @Inject constructor(
private val articleDao: IArticleDao
) {
fun list(order: String) = articleDao.pagingSource(order)
}
ViewModel
@HiltViewModel
class ArticleViewModel @Inject constructor(private val articleRepository: ArticleRepository) : ViewModel() {
fun list(order: String) = Pager(PagingConfig(pageSize = 20)){
articleRepository.list(order)
}.flow.cachedIn(viewModelScope)
}
Screen
val articleViewModel = hiltViewModel<ArticleViewModel>()
val lazyArticleItem = articleViewModel.list("id").collectAsLazyPagingItems()
ArticlePage(lazyArticleItem)
ArticlePage
LazyColumn{
items(...)
when(val state = lazyArticleItem.loadState.append){
is LoadState.Error -> {
println("error")
}
is LoadState.Loading -> {
println("${lazyArticleItem.itemCount}, ${lazyArticleItem.itemSnapshotList}")
}
else -> {}
}
}
lazyArticleItem.itemCount printed the number 668, so I don't think the pagination is working properly, but the data displayed on the UI interface is fine, it's just not paginated by 20 items per page.
