Keep Your ViewModels Clean: A Guide to Event-Driven Architecture in Android

Hey guys I have come up with another Article on keeping your ViewModels clean and easy and the ViewModel Architecture I am showing is best for Compose.

Prerequisites

1. Knowledge of basic Architecture
2. Knowledge of basic Flows

Let's begin by understanding the terms you will see here for managing ViewModels.

The Core Concepts: Actions, Events, and States

Breaking down the user interactions into actions, events, and states is crucial for keeping your ViewModel clean and maintainable.

1. Actions: These represent user inputs or UI interactions. Actions define what the user wants to do, such as changing a text field, clicking a button, or toggling a switch. By encapsulating all possible user interactions in a sealed class or enum, you centralize the logic for handling these actions.
2. Events: Events are outputs from the ViewModel to the UI. They represent one-time effects, like showing a toast, navigating to another screen, or displaying an error message. Using a Channel or SharedFlow for events ensures that the UI receives these events without needing to observe them continuously.