android build_error ai_generated true

java.lang.UnsupportedClassVersionError: com/example/MyClass has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java runtime only recognizes class file versions up to 55.0

ID: android/kotlin-unsupported-class-version

Also available as: JSON · Markdown · 中文
92%Fix Rate
86%Confidence
1Evidence
2024-01-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Android Gradle Plugin 7.4.0 active — — —
AGP 8.0.0 active — — —
AGP 8.1.0 active — — —
AGP 8.2.0 active — — —
Kotlin 1.8.0 active — — —
Kotlin 1.9.0 active — — —
Kotlin 2.0.0 active — — —
Java 11 active — — —
Java 17 active — — —
Java 21 active — — —

Root Cause

A dependency or project module is compiled with a higher Java bytecode version than the compileSdk or JVM target supports, causing a version mismatch at runtime or build time.

generic

中文

依赖项或项目模块使用比 compileSdk 或 JVM 目标支持的更高的 Java 字节码版本编译，导致运行时或构建时版本不匹配。

Official Documentation

https://developer.android.com/studio/build/gradle-tips#configure-jdk

Workarounds

  1. 90% success Set the Java bytecode version in build.gradle (Module: app): android { compileOptions { sourceCompatibility JavaVersion.VERSION_11 targetCompatibility JavaVersion.VERSION_11 } kotlinOptions { jvmTarget = "11" } } Ensure the JDK used by Gradle is at least JDK 17 for class file version 61.0. Check with java -version in terminal. 
    Set the Java bytecode version in build.gradle (Module: app): android { compileOptions { sourceCompatibility JavaVersion.VERSION_11 targetCompatibility JavaVersion.VERSION_11 } kotlinOptions { jvmTarget = "11" } } Ensure the JDK used by Gradle is at least JDK 17 for class file version 61.0. Check with java -version in terminal.
  2. 92% success If a dependency is compiled with Java 17 bytecode, update the Gradle JDK in Android Studio: File > Settings > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK > select JDK 17 or higher. Then rebuild. 
    If a dependency is compiled with Java 17 bytecode, update the Gradle JDK in Android Studio: File > Settings > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK > select JDK 17 or higher. Then rebuild.
  3. 85% success Exclude the offending dependency and use a compatible version. For example, if a library requires bytecode 61.0, find an older version that targets 55.0: implementation('com.example:library:1.0.0') { exclude group: 'com.example' } Then add implementation 'com.example:library:0.9.0'. 
    Exclude the offending dependency and use a compatible version. For example, if a library requires bytecode 61.0, find an older version that targets 55.0: implementation('com.example:library:1.0.0') { exclude group: 'com.example' } Then add implementation 'com.example:library:0.9.0'.

中文步骤

  1. Set the Java bytecode version in build.gradle (Module: app): android { compileOptions { sourceCompatibility JavaVersion.VERSION_11 targetCompatibility JavaVersion.VERSION_11 } kotlinOptions { jvmTarget = "11" } } Ensure the JDK used by Gradle is at least JDK 17 for class file version 61.0. Check with java -version in terminal.
  2. If a dependency is compiled with Java 17 bytecode, update the Gradle JDK in Android Studio: File > Settings > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK > select JDK 17 or higher. Then rebuild.
  3. Exclude the offending dependency and use a compatible version. For example, if a library requires bytecode 61.0, find an older version that targets 55.0: implementation('com.example:library:1.0.0') { exclude group: 'com.example' } Then add implementation 'com.example:library:0.9.0'.

Dead Ends

Common approaches that don't work:

  1. Set compileSdk to a higher value like 34 to force the build to accept newer bytecode 95% fail

    compileSdk controls API level, not bytecode version; it does not affect class file version compatibility.

  2. Add multiDexEnabled true to build.gradle 99% fail

    MultiDex handles method count limits, not bytecode version issues.

  3. Downgrade the Kotlin version to 1.6.0 to use older bytecode 80% fail

    This may break newer Kotlin features and does not fix the dependency that is already compiled with a higher version.