SharedFlow

A hot flow that can emit multiple values and has no initial value. Supports replay and buffer.

Basic Usage

class MyViewModel : ViewModel() {
    private val _events = MutableSharedFlow<String>()
    val events: SharedFlow<String> = _events.asSharedFlow()

    fun sendEvent(event: String) {
        viewModelScope.launch {
            _events.emit(event)
        }
    }
}

SharedFlow with Replay

// Replay last 3 values to new collectors
private val _events = MutableSharedFlow<String>(replay = 3)

Collect SharedFlow in Composable

@Composable
fun MyScreen(viewModel: MyViewModel = viewModel()) {
    LaunchedEffect(Unit) {
        viewModel.events.collect { event ->
            // Handle one-time events (e.g., show snackbar, navigate)
            println("Event received: $event")
        }
    }
}

When to Use SharedFlow

• One-time events (navigation, snackbar, toast)
• Events that should not be replayed on configuration change
• Broadcasting to multiple collectors

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