如何用invoke传递高阶挂起函数中的参数

Question

我想用参数从其他类调用高阶挂起函数，但我不知道如何调用。

class CharactersListViewModel : ViewModel() {
private val dataSourceFactory =
PageKeyDataSourceFactory(
scope = viewModelScope,
request = suspend {createRequest(0)
}
)
private suspend inline fun createRequest(offset : Int): MutableList<CharacterItem> {
val repository = Injection.provideMarvelRepository()
val response = repository.getCharacters(
offset = offset,
limit = PAGE_MAX_ELEMENTS
)
return CharacterItemMapper().map(response).toMutableList()
}

其他类别

class PageKeyDataSourceFactory<Value>(
private val scope: CoroutineScope,
private var request: suspend () -> MutableList<Value>
) : DataSource.Factory<Int, Value>() {
private var dataSource: PageKeyDataSource<Value>? = null
override fun create(): DataSource<Int, Value> {
dataSource = PageKeyDataSource(request = request, scope)
sourceLiveData.postValue(dataSource)
return dataSource as PageKeyDataSource<Value>
}

这里的类我调用函数

loadAfter函数中有一个params，我想用来调用request.invoke((

class PageKeyDataSource<Value>(
private val request: suspend() -> MutableList<Value>,
private val scope: CoroutineScope,
) : PageKeyedDataSource<Int, Value>() {
override fun loadAfter(params: LoadParams<Int>, callback: LoadCallback<Int, Value>) {
scope.launch(
CoroutineExceptionHandler { _, _ ->
retry = {
loadAfter(params, callback)
}
networkState.postValue(NetworkState.Error(true))
}
) {
val data = request.invoke()
callback.onResult(data, params.key + PAGE_MAX_ELEMENTS)
networkState.postValue(NetworkState.Success(true, data.isEmpty()))
}
}
}

Answer 1

class PageKeyDataSource<Value>(private val request: suspend (yourParams:YourType) -> MutableList<Value>) {
...
// some code
val list:MutableList<Value> = request.invoke(yourParams)
}