Android Tutorial #5: Multi-Module Architecture — Scalable App Structure
Your single-module app compiles in 45 seconds. You add more features. More screens. More dependencies. Now it takes 3 minutes. Every small change triggers a full rebuild. Worse, any file can import any other file. Your UI layer imports database classes directly. A junior developer bypasses the repository and calls the DAO from a Composable. There are no boundaries. Multi-module architecture fixes both problems. Faster builds (Gradle only recompiles changed modules) and enforced boundaries (modules can only access what they depend on). ...