Hi, any ideas which flow constructs could produce the following behaviour: - keeps its latest value ...

# android-architecture

[Smorg]

Hi, any ideas which flow constructs could produce the following behaviour:
• keeps its latest value (as StateFlow behaves), but once that value is consumed, it no longer has any value (until it receives another and the cycle continues).

[divid3d]

Maybe SharedFlow is what you might looking for.

[Smorg]

yes, I have read about SharedFlow , but it doesn’t satisfy this requirement AFAICT
• with a replay value of 1, it is always going to keep and re-emit that 1 value if a new subscriber subscribes, but it is required for it not to keep that value if it receives it while there is a subscriber.
• with a replay value of 0, it is never going to keep any value, but it is required for it to keep 1 value when there are no subscribers.

[solidogen]

you want a plain Channel

[solidogen]

it suspends until a value is received

[solidogen]

https://elizarov.medium.com/shared-flows-broadcast-channels-899b675e805c

[solidogen]

(not BroadcastChannel)

[solidogen]

just keep in mind that you can’t have multiple subscribers this way

[Smorg]

Thanks @solidogen. I’ll take a look, maybe that’s just what I need.

[mario]

Do you want this for to do a navigation? I have a problem with this, my viewmodel has a sealed class with destinies of navigations, for example navigateToMain , navigateToLanding and this is a problem because when i press back button the behavior is go back an go foward again ( the stateflow is readed again)