The transition from KAPT (Kotlin Annotation Processing Tool) to KSP (Kotlin Symbol Processing) is no longer optional. With Google formally deprecating KAPT and KSP offering up to 2x faster build speeds, the migration is inevitable. However, the path is rarely smooth. The most common hurdle during refactoring is a successful Gradle sync followed immediately by build failures. Errors like Unresolved reference , missing generated classes (e.g., DaggerHiltApplication_HiltComponents ), or Room databases failing to verify schemas are rampant. This guide provides a rigorous technical solution to these migration failures, focusing on the root causes within the build toolchain and the specific configuration changes required for Room and Hilt. The Root Cause: Why KAPT Logic Breaks in KSP To fix the errors, you must understand why they happen. KAPT and KSP operate at different stages of the compilation pipeline. 1. The Java Stub Barrier KAPT works by generating Java stubs from y...
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