https://www.compilemymind.com/tags/kotlin/ Recent content in Kotlin on Compile My Mind Hugo en Sun, 26 Jul 2026 18:20:00 +0200 https://www.compilemymind.com/posts/android-app-architecture-ui-domain-data-layers/ Sun, 19 Jul 2026 23:35:17 +0300 https://www.compilemymind.com/posts/android-app-architecture-ui-domain-data-layers/ <p>An Android architecture is useful when it answers three ordinary questions without a team meeting:</p> <ol> <li><strong>Where does this state come from?</strong></li> <li><strong>Who is allowed to change it?</strong></li> <li><strong>How can I test the behavior without starting an emulator?</strong></li> </ol> <p>The practical answer is usually a UI layer backed by a data layer, with a domain layer only where reusable or complex business rules justify it. The point is not to collect <code>Repository</code>, <code>UseCase</code>, and <code>ViewModel</code> classes. The point is to make state ownership and dependency direction obvious.</p>