Programming Tutorials

  There is rarely a frustration more acute in game development than a "Build Successful" notification followed immediately by a runtime crash. If you are integrating the Start.io (formerly StartApp) SDK into Unity, you have likely encountered the infamous  java.lang.NoClassDefFoundError  or cryptic Gradle build failures. These errors often appear during the final stages of the build process or, worse, strictly in Release builds while Debug builds run perfectly. This guide provides a definitive technical solution to resolve Start.io dependencies in Unity, specifically addressing Android Gradle conflicts and R8/ProGuard stripping issues. The Root Cause: Why  NoClassDefFoundError  Happens To fix the error permanently, you must understand the architecture failure. Unity runs on C# (Mono/IL2CPP), but Android plugins run on Java/Kotlin. When you call the Start.io SDK from C#, you are bridging two different runtime environments. The  NoClassDefFoundError  occ...