Hello! When I try to implement kotlin-written aar ...

# android

[Aleksey Kornienko]

Hello! When I try to implement kotlin-written aar library in java only project I get an error “Error: Program type already present: com.mylibrary.internal.event.EventKeys$Alive$Companion”
So, this means that I can’t use kotlin jars/aars in non-kotlin projects?

[nestserau]

It is possible.

[nestserau]

I guess the issue is with how you declare dependencies.

[Aleksey Kornienko]

thanks, I try to find an error in this way 🙂

[Aleksey Kornienko]

just I don’t use nothing special, only add a local repo

allprojects {
    repositories {
        flatDir {
            dirs 'libs'
        }
    }
}

and app my aar as dependency

dependencies {
    implementation(name:'mylibrary-release', ext:'aar')
}

[nestserau]

Can you show you build.gradle in its entirety?

[nestserau]

I personally use Archiva (a Maven repo), works like a charm. You can run it locally too, it’s a couple of lines in the Terminal to set everything up. Then you’re not bound to the error-prone flat dir stuff.

[Aleksey Kornienko]

yes, of course. It’s a new empty java project just with my kotlin library

MyApplication.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        

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

allprojects {
    repositories {
        google()
        jcenter()
        flatDir {
            dirs 'libs'
        }
    }
}

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

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.unownedself.myapplication"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), '<http://proguard-rules.pro|proguard-rules.pro>'
        }
    }
}

dependencies {
    implementation(name:'mylibrary-release', ext:'aar')

    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:support-vector-drawable:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

[Aleksey Kornienko]

thanks, I will try Archiva soon

[Aleksey Kornienko]

or I can use bintray

[nestserau]

I cannot spot an error in your Gradle script right off the bat.

[Aleksey Kornienko]

I try to create jar file, and put it in project 🙂 It’s crash with classnotfound

java.lang.NoClassDefFoundError: Failed resolution of: Lkotlin/jvm/internal/Intrinsics;

[Aleksey Kornienko]

So, nevetheless, I think I need a kotlin-stdlib dependency 🙂

[nestserau]

Okay, let us know the solution once you’re there.