Programming Tutorials

  If you recently updated your Android project dependencies to   Google Play Billing Library v7.0.0+ , your build likely failed with an unresolved reference error regarding   ProrationMode . The error typically looks like this:  Unresolved reference: ProrationMode  or  Cannot resolve method setReplaceProrationMode . Google has enforced a mandatory migration deadline for August 2025. This update isn't just a syntax change; it represents a fundamental shift in how the Play Store handles subscription lifecycle management. The  ProrationMode  enum and its associated setters have been removed entirely in favor of  ReplacementMode . This guide provides the technical root cause, the direct mapping for migration, and a production-ready Kotlin implementation. Root Cause Analysis: Why ProrationMode Was Removed To understand the fix, you must understand the architectural change in the underlying API. In Billing Library v4 and earlier, subscriptions were...