📐 Material 3 Adaptive: Implementing Window Size Classes in Kotlin Compose

This content originally appeared on DEV Community and was authored by Marlon López

Hey everyone! 👋

I wanted to share a look at a crucial technique for modern Android development: implementing Window Size Classes to create truly adaptive layouts that align with the recent updates to Material 3 Adaptive Guidance.

The MobileWindowSize enum in this code snippet is the foundation. It categorizes the available screen space based on Google's defined WindowWidthSizeClass and WindowHeightSizeClass (Compact, Medium, Expanded).

🧐 Material 3 & Component Placement:

This code directly drives key design decisions based on the available screen space, like:

• Navigation: Deciding whether to use a bottom NavigationBar (Compact), a NavigationRail (Medium), or a permanent NavigationDrawer (Expanded).

• Content Layout: Reorganizing content (e.g., using a master-detail pattern) to maximize screen utility on tablets and desktops.

By mapping screen dimensions to profiles like MOBILE_PORTRAIT or DESKTOP, we ensure our app components are always displayed according to Material 3's best practices for large screens.

📚 Resources & Official Documentation

For the full guide on implementation and understanding the key breakpoints used in M3 Adaptive, these are the best resources:

1. Official Google Guide: Check out the complete guide on implementing this strategy: Use window size classes | Adaptive layouts in Compose | Android Developers

2. Practical Course: To see another code implementation of Window Size Classes using Material 3 Adaptive, check out this Compose crash course from Philipp Lackner: The Full Jetpack Compose Responsive UI Crash Course (The topic starts at [31:21]).

Implementing this logic is non-negotiable for delivering a high-quality, multi-form factor user experience!

This content originally appeared on DEV Community and was authored by Marlon López

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Marlon López | Sciencx (2025-11-12T02:59:14+00:00) 📐 Material 3 Adaptive: Implementing Window Size Classes in Kotlin Compose. Retrieved from https://www.scien.cx/2025/11/12/%f0%9f%93%90-material-3-adaptive-implementing-window-size-classes-in-kotlin-compose/

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" » 📐 Material 3 Adaptive: Implementing Window Size Classes in Kotlin Compose." Marlon López | Sciencx - Wednesday November 12, 2025, https://www.scien.cx/2025/11/12/%f0%9f%93%90-material-3-adaptive-implementing-window-size-classes-in-kotlin-compose/

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" » 📐 Material 3 Adaptive: Implementing Window Size Classes in Kotlin Compose." Marlon López | Sciencx [Online]. Available: https://www.scien.cx/2025/11/12/%f0%9f%93%90-material-3-adaptive-implementing-window-size-classes-in-kotlin-compose/. [Accessed: ]

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» 📐 Material 3 Adaptive: Implementing Window Size Classes in Kotlin Compose | Marlon López | Sciencx | https://www.scien.cx/2025/11/12/%f0%9f%93%90-material-3-adaptive-implementing-window-size-classes-in-kotlin-compose/ |

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