In android, if I launch a coroutine from my fragment to collect a flow. Should I be calling this with

launch

,

launchWhenStarted

or

launchWhenResumed

. Assuming I’m calling this in the fragment’s

onViewCreated

viewLifecycleOwner.lifecycleScope.launchWhenResumed { }

It all depends on what you do in the final

collect

block. I'd say that all three are roughly equivalent in your case. You can also use

flow.onEach { ... }.launchIn(viewLifecycleOwner.lifecycleScope)

Thanks

it’s more kotlin-y i guess ..there’s no diff

In fact,

flow.launchIn(scope)

does exactly the same thing as

scope.launch { flow.collect() }

. You may prefer the former because it could be called in the same operator chain:

flowOf(0, 1, 2, 3)
    .filter { it % 2 == 0 }
    .map { it * it }
    .launchIn(scope)

VS

val flow = flowOf(0, 1, 2, 3)
    .filter { it % 2 == 0 }
    .map { it * it }
scope.launch { flow.collect() }