Android Studio throws build error in Kotlin project which calls static method in java interface

Question

I have a Kotlin project in Android Studio. I am calling a static method in Java interface from the Kotlin code. The build fails with the error,

Calls to static m         


        

Answer 1

I am able to resolve this by adding below block as my build.gradle is not in dsl. To set the target JVM version for the Kotlin compiler, use the following block:

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

Answer 2

Proper way to set Kotlin compile options in android gradle. Make these changes to your app level Build.gradle

Change

implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"

to

implementation "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"

Then write this task

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8

    kotlinOptions {
        jvmTarget = '1.8'
        apiVersion = '1.1'
        languageVersion = '1.1'
    }
}

just below(not necessarily)

repositories {
    mavenCentral()
}

For details, refer here

Answer 3

The compileOptions section in build.gradle affects the Java compiler, not the Kotlin compiler. To set the target JVM version for the Kotlin compiler, use the following block:

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

See the documentation for more information.

Answer 4

I had the same problem because I had a folder for the integration tests different than the unit test folder. So the build.gradle needs more configuration:

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
} 
//added this
compileIntegrationTestKotlin {
  kotlinOptions.jvmTarget = "1.8"
}