Hello! I have MutableStateFlow (with string data a...

# flow

[Sanendak]

Hello!
I have MutableStateFlow (with string data as state) in PhoneStateListener class. I want to collect this flow in another class, where listener provides in constructor (repository). But this works only first time.

[Sanendak]

private val _state = MutableStateFlow("initial")
val state: StateFlow<String> = _state

How i change state:

_state.value = "ringing"

How collected:

fun getCallLog() = flow<String> {
    listenerService.state.collect {
        Log.d("CALL STATE", it)
        emit(it)
    }
}

When I collect in the same place where I create StateFlow all works fine.

[baxter]

So you should make your state flow immutable in your ListenerService as such: val state: StateFlow<String> = _state.asStateFlow()

Then, instead of wrapping the state flow, you can just pass it back directly when you call getCallLog(). Each time you collect the flow, it'll emit the latest item as well as all subsequent ones.

[baxter]

If you want to keep your debug log, you can do:

fun getCallLog(): Flow<String> = listenerService.state.onEach { Log.d("CALL STATE", it) }

[Sanendak]

Thanks! It work!