如何将流<PagingData<Data>>声明为变量

Question

我正在尝试使用 peging 3 库获取 API 数据。我正在关注本教程。但是，该 API 会被多次调用。我认为这是因为 compose 中的这段代码：

 val documentList = dashboardViewModel.getBreakingNews().collectAsLazyPagingItems()

这是视图模型的代码

fun getBreakingNews(

    ): Flow<PagingData<Data>> = getNews().cachedIn(viewModelScope)



    fun getNews() = Pager(
        config = PagingConfig(
            pageSize = 10,
        ),
        pagingSourceFactory = {
            DocPagingSource(arkeliyaApiService)
        }
    ).flow

我想声明

Flow<PagingData<Data>>

就像我对其他 API 所做的那样

例如

 private val _listofReqDoc = MutableStateFlow<List<Data>>(listOf())
    val listofReqDoc = _listofReqDoc.asStateFlow()

Answer 1

就这么简单

val breakingNews = Pager(
    config = PagingConfig(
        pageSize = 10,
    ),
    pagingSourceFactory = {
        DocPagingSource(arkeliyaApiService)
    }
).flow.cachedIn(viewModelScope)

val documentList = dashboardViewModel.breakingNews.collectAsLazyPagingItems()