Android Compose - 官方SwipeRefreshLayout（下拉刷新）

class MyViewModel : ViewModel() {
    private val _isRefreshing = MutableStateFlow(false)

    val isRefreshing: StateFlow<Boolean>
        get() = _isRefreshing.asStateFlow()

    fun refresh() {
        viewModelScope.launch {
            // 延迟2秒
            _isRefreshing.emit(true)
            delay(2000)
            _isRefreshing.emit(false)
        }
    }
}

@Composable
fun SwipeRefreshSample() {
    val viewModel: MyViewModel = viewModel()
    val isRefreshing by viewModel.isRefreshing.collectAsState()

    SwipeRefresh(
        state = rememberSwipeRefreshState(isRefreshing),
        onRefresh = { viewModel.refresh() },
    ) {
        LazyColumn {
            items(30) { index ->
                // item列表
            }
        }
    }
}