从 PagingSource 的 LoadResult.Error 中提取 Throwable
Extract Throwable from LoadResult.Error of PagingSource
我的 PagingSource 加载一些数据。文档建议像这样捕获异常,以便将来进行某些处理 LoadResult.Error。
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Item> {
return try {
...
throw SomeCatchableException()
...
} catch (e: SomeCatchableException) {
LoadResult.Error(e)
} catch (e: AnotherCatchableException) {
LoadResult.Error(e)
}
}
但是当我尝试这样处理时:
(adapter as PagingDataAdapter).loadStateFlow.collectLatest { loadState ->
when (loadState.refresh) {
is LoadState.Loading -> {
// *do something in UI*
}
is LoadState.Error -> {
// *here i wanna do something different actions, whichever exception type*
}
}
}
我想知道哪个扩展会被捕获,因为我在参数 LoadResult.Error(e)[=25 中传递了它 (Throwable) =].
如何知道loadState处理异常的类型?
在 LoadState.Error 的情况下,您可以从 loadState.refresh 捕获错误,您只是错过了从 loadState.refresh 到 LoadState.Error 的强制转换。或者试试这个方法:
when (val currentState = loadState.refresh) {
is LoadState.Loading -> {
...
}
is LoadState.Error -> {
val extractedException = currentState.error // SomeCatchableException
...
}
}
我的 PagingSource 加载一些数据。文档建议像这样捕获异常,以便将来进行某些处理 LoadResult.Error。
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Item> {
return try {
...
throw SomeCatchableException()
...
} catch (e: SomeCatchableException) {
LoadResult.Error(e)
} catch (e: AnotherCatchableException) {
LoadResult.Error(e)
}
}
但是当我尝试这样处理时:
(adapter as PagingDataAdapter).loadStateFlow.collectLatest { loadState ->
when (loadState.refresh) {
is LoadState.Loading -> {
// *do something in UI*
}
is LoadState.Error -> {
// *here i wanna do something different actions, whichever exception type*
}
}
}
我想知道哪个扩展会被捕获,因为我在参数 LoadResult.Error(e)[=25 中传递了它 (Throwable) =].
如何知道loadState处理异常的类型?
在 LoadState.Error 的情况下,您可以从 loadState.refresh 捕获错误,您只是错过了从 loadState.refresh 到 LoadState.Error 的强制转换。或者试试这个方法:
when (val currentState = loadState.refresh) {
is LoadState.Loading -> {
...
}
is LoadState.Error -> {
val extractedException = currentState.error // SomeCatchableException
...
}
}