Exploring Different Ways to Collect Kotlin Flow

Simple app to demonstrate Kotlin flow(), emit(), collectAsState(), collect(), viewModelScope.launch(), launchWhenStarted() and repeatOnLifecycle()

This is part of the asynchronous flow series:

• Part 1 — Exploring Android LiveData Usages and Behaviors
• Part 2 — Introduction to Kotlin Flows and Channels
• Part 3 — Exploring Different Ways to Collect Kotlin Flow
• Part 4 — Convert Flow to SharedFlow and StateFlow
• Part 5 — Flow, SharedFlow, StateFlow Class Diagram
• Part 6 — Kotlin Flow — Combine, Merge and Zip

Basic Kotlin Flow Usages

You first need to create a flow before you can collect it.

Create Flow<T> and Emit T Value

1. Create Flow<T> Using kotlinx.coroutines.flow.flow()

The first parameter of the flow() is the function literal with receiver. The receiver is the implementation of FlowCollector<T> interface, which you can call FlowCollector<T>.emit() to emit the T value.