android - 如何在Android中使用Paging 3库显示空 View

当分页3加载空列表时，我想显示空 View 。
似乎可以使用以下代码。这是使用分页3库的正确方法吗？:

        adapter?.addLoadStateListener { loadState ->
            adapter?.apply {
                if (itemCount <= 0 && !loadState.source.refresh.endOfPaginationReached) {
                    Timber.d("==> to show empty view")
                    tvEmptyView.isGone = false
                } else {
                    Timber.d("==> to hide empty view")
                    tvEmptyView.isGone = true
                }
            }
        }

最佳答案

您可以直接插入适配器loadStateFlow，例如

    lifecycleScope.launchWhenCreated {
        @OptIn(ExperimentalCoroutinesApi::class)
        adapter.loadStateFlow.collectLatest { loadStates ->
            val refresher = loadStates.refresh
            val displayEmptyMessage =  (refresher is LoadState.NotLoading && refresher.endOfPaginationReached && adapter.itemCount == 0)
            layoutBinding.emptyStateMessage.isVisible = displayEmptyMessage
            layoutBinding.emptyStateImage.isVisible = displayEmptyMessage
            layoutBinding.swipeToRefresh.isRefreshing = refresher is LoadState.Loading
        }
    }