Inconsistent JVM Target Compatibility: Support for Java 17

[zinon-software]

Hello,

I am facing an issue while building my project that uses flutter_callkit_incoming, as my project requires Java 17 compatibility. The error is as follows:

Execution failed for task ':flutter_callkit_incoming:compileDebugKotlin'.

Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (1.8) and 'compileDebugKotlin' (17).

Steps to Reproduce:
Set the sourceCompatibility and targetCompatibility in my project to JavaVersion.VERSION_17.
Add flutter_callkit_incoming as a dependency.
Try to build the project.
Expected Behavior:
The library should support Java 17 for compatibility with modern Android projects.

Actual Behavior:
The build fails due to JVM compatibility mismatch.

Proposed Solution:
Update the build.gradle of the library to support Java 17:

android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_17
targetCompatibility JavaVersion.VERSION_17
}

  kotlinOptions {
      jvmTarget = "17"
  }

}

Additional Info:
Flutter version: Flutter (Channel stable, 3.27.0, on Microsoft Windows [Version 10.0.22621.4317], locale en-US)
flutter_callkit_incoming version: flutter_callkit_incoming: ^2.0.4+2
Kotlin version: (1.9.10)
Android Gradle Plugin version: (distributionUrl=https://services.gradle.org/distributions/gradle-8.9-all.zip)
I appreciate your help in resolving this issue or providing a workaround for compatibility with Java 17.

Thank you!

[RazvanTamazlicariu]

i have the same problem

[0x1af2aec8f957]

Temporary solution:

// @work/android/build.gradle

allprojects {
    ...
    subprojects {
        afterEvaluate { project ->
            if (project.plugins.hasPlugin("kotlin-android")) {
                project.tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
                    kotlinOptions {
                        jvmTarget = JavaVersion.VERSION_17
                        ...
                    }
                    ...
                }
                ...
            }

            if (project.plugins.hasPlugin("com.android.application") || project.plugins.hasPlugin("com.android.library")) {
                project.android {
                    ...
                    compileOptions {
                        sourceCompatibility = JavaVersion.VERSION_17
                        targetCompatibility = JavaVersion.VERSION_17
                        ...
                    }
                }
                ...
            }
            ...
        }
        ...
    }
}
...

[Prince2347X]

Temporary solution:

// @work/android/build.gradle

allprojects {
    ...
    subprojects {
        afterEvaluate { project ->
            if (project.plugins.hasPlugin("kotlin-android")) {
                project.tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
                    kotlinOptions {
                        jvmTarget = JavaVersion.VERSION_17
                        ...
                    }
                    ...
                }
                ...
            }

            if (project.plugins.hasPlugin("com.android.application") || project.plugins.hasPlugin("com.android.library")) {
                project.android {
                    ...
                    compileOptions {
                        sourceCompatibility = JavaVersion.VERSION_17
                        targetCompatibility = JavaVersion.VERSION_17
                        ...
                    }
                }
                ...
            }
            ...
        }
        ...
    }
}
...

Thanks :)