Skip to main content

Posts

Showing posts with the label Kotlin

Solved: 'The project is using an incompatible version of the Android Gradle plugin'

  You just upgraded Android Studio or the Flutter SDK. You open your project, expecting new features, but instead, the build fails immediately. The console spews a cryptic error message resembling this: "The project is using an incompatible version (AGP 8.2.1) of the Android Gradle plugin. Latest supported version is X.Y.Z. Minimum supported Gradle version is 8.2." This is the "Dependency Hell" of the Android ecosystem. It stops development dead in its tracks. Here is why it happens and the exact configuration required to fix it. The Root Cause: The AGP-Gradle-JDK Triad To fix this permanently, you must understand that the Android build system relies on three distinct components that must be version-aligned. If one is out of sync, the build fails. Gradle Wrapper:  The build tool itself (the engine). Android Gradle Plugin (AGP):  The logic that teaches Gradle how to build  Android  apps. Java Development Kit (JDK):  The environment running Gradle. The error ...

Solving Android Gradle Plugin 9.0 & Java 17 Compatibility in Flutter 2025

  You have just upgraded your Flutter SDK or dependencies, attempted a build, and hit a wall of red text. The logs are screaming about   Incompatible Gradle version , asking you to specify a   namespace , or throwing   Unsupported class file major version 61   (or 65). In the transition to 2025, the Android ecosystem has aggressively deprecated legacy build configurations. Android Gradle Plugin (AGP) 9.0 and the enforcement of Java 17+ (and increasingly Java 21) are no longer optional warnings—they are breaking changes. This post dissects why your build is failing and provides the exact code changes required to modernize your Flutter project’s Android layer. The Root Cause: Bytecode and Separation of Concerns Two primary architectural shifts are causing these failures: The Manifest/Gradle Split (AGP 8.0 -> 9.0):  Historically, the  AndroidManifest.xml  handled both the application ID (for the Play Store) and the package name (for R.java class g...