Mastering State Management in Kotlin Multiplatform (KMP) and Compose Multiplatform (CMP)

In this codelab, you'll explore practical state management techniques in Kotlin Multiplatform (KMP) and Compose Multiplatform (CMP). You'll begin by mastering fundamental concepts of UI state, recomposition, and reactive UI updates. Learn to effectively use Compose’s built-in state APIs (remember, mutableStateOf) and understand how to manage complex states across composable lifecycles using a shared ViewModel pattern. You’ll apply best practices like state hoisting to create reusable, testable composables. You'll also leverage advanced tools such as StateFlow, MutableStateFlow, and derivedStateOf to optimize performance and recomposition. Additionally, you'll integrate structured concurrency with Kotlin coroutines and safely manage lifecycle-aware state and side effects. Finally, you'll build efficient, responsive scrollable UIs with lazy composables, bringing all these concepts together in practical, hands-on examples.

Codelab Objectives

In this codelab, you’ll explore:

  • Learn fundamentals of State management in KMP and CMP Apps
  • Learn how Compose handles state, recomposition, and state-driven UI updates
  • Manage UI state with remember and mutable state APIs
  • Share UI state across composable lifecycles using a shared ViewModel pattern
  • Apply state hoisting to promote reusable composables
  • Use StateFlow and MutableStateFlow to manage UI state
  • Optimize UI using derivedStateOf to recompute state only when necessary
  • Use Compose side-effect APIs to manage lifecycle-aware state and asynchronous tasks
  • Integrate structured concurrency using Kotlin coroutines
  • Build efficient scrollable UIs using LazyColumn and LazyRow

Codelab Content

Meet the instructor

Mohit Soni

Content Author & Course Instructor

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