kotlin-flows

Kotlin StateFlow is for representing and emitting current UI state to a single subscriber, while SharedFlow is for broadcasting events to multiple collectors. Choosing between them depends on whether you need state retention or event distribution in your asynchronous data streams.

Lifecycle-safe Flow collection in Android ensures streams are only collected when the UI is active. This prevents memory leaks and crashes by scoping coroutine collection to valid lifecycle states, stopping emissions when the screen is not visible.

Testing Kotlin Flows with Turbine allows you to validate asynchronous data stream emissions, operator chains, and error handling. It provides a virtual time controller to assert emission sequences and verify reactive programming logic without actual delays.

Callback bridging converts callback-based APIs into Kotlin Flows by using suspendCancellableCoroutine or callbackFlow. This allows you to wrap existing asynchronous network sources and emit real-time data updates through standard Flow operators.

Kotlin Coroutines Flows are fully compatible with Kotlin Multiplatform (KMP) projects for state management. They provide KMP-specific patterns for asynchronous data streams that work across multiple platforms while maintaining consistent reactive programming behavior.

Migrating from Kotlin Channels to Flows is recommended when you need state management and continuous data streams rather than single element passing. Flows offer better operator chains and lifecycle-safe collection compared to raw Channel synchronization.