kotlin.jvm.KotlinReflectionNotSupportedError: Kotlin reflection implementation is not found at runtime. Make sure you have kotlin-reflect.jar

Question

When I compile I got the above error. My gradle file as below : -

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 23
    buildToolsVersion "24.0.0 rc2"

    defaultConfig {
        applicationId "package.name"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 6
        versionName "2.0"
    }

    buildTypes {
        debug {
            minifyEnabled false
            signingConfig signingConfigs.debug
        }
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
    }
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile "com.android.support:appcompat-v7:$support_version"
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile "org.jetbrains.anko:anko-sdk15:$anko_version"
    compile "org.jetbrains.anko:anko-support-v4:$anko_version"
    compile "com.android.support:recyclerview-v7:$support_version"
}

buildscript {
    ext.kotlin_version = '1.0.1-2'
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
    }
}
repositories {
    mavenCentral()
}

And my project gradle as below

buildscript {
    ext.support_version = '23.2.1'
    ext.kotlin_version = '1.0.1'
    ext.anko_version = '0.8.3'
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0-alpha3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Did I miss adding anything?

David · Accepted Answer · 2018-09-18 14:25:18Z

187

From the error, I assume:

implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"

in your dependencies in addition to the standard library.

edited Sep 18, 2018 at 14:25

David

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answered Apr 6, 2016 at 2:20

AndroidEx

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7 Comments

Elye Over a year ago

Thanks! Found we need

compile "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version" testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version"

as per in kotlinlang.org/docs/reference/using-gradle.html

Don Hatch Over a year ago

Perhaps not obvious: (1) must be double quotes, not single, otherwise $kotlin_version won't expand, (2) according to kotlinlang.org/docs/reference/… , the :$kotlin_version can be omitted if it's >= 1.1.2. But that seems to be broken for me (my $kotlin_version is 1.2.10 currently); the error message shows that it constructs a bogus url such as https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-reflect//kotlin-reflect-.jar. So, I am still using the recipe in this answer.

kip2 Over a year ago

Worth mentioning that implementation is now the favored directive over compile: implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"

Maiko Trindade Over a year ago

is there any proguard rule for this dependency?

David Gomes Over a year ago

I still get the error.. Even using the shadow jar plugin (and indeed I confirmed that kotlin-reflect is in the .jar

|

Pawan Soni · Accepted Answer · 2020-01-08 11:03:41Z

8

I resolved this by adding this in build.gradle

implementation "org.jetbrains.kotlin:kotlin-reflect:1.3.61"

answered Jan 8, 2020 at 11:03

Pawan Soni

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Comments

Arade · Accepted Answer · 2018-09-29 16:51:45Z

1

For me the issue was not having the same versions of kotlin I'm my modules and lib so I had to force them to use the same version

configurations.all {
    resolutionStrategy {
        eachDependency { DependencyResolveDetails details ->
            if (details.requested.group == 'org.jetbrains.kotlin') {
                details.useVersion versions.kotlin
            }
        }
    }}

answered Sep 29, 2018 at 16:51

Arade

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