android - 使用 Kotlin : ClassNotFoundException 创建 AAR

Question

我使用 Kotlin 编写了 Android 库。我正在生成 AAR 文件。但是当我将此 AAR 添加到另一个 Java 项目时，应用程序在启动时崩溃:

Process: ru.bartwell.app, PID: 10412
    java.lang.NoClassDefFoundError: Failed resolution of: Lkotlin/jvm/internal/Intrinsics;
        at ru.bartwell.mylib.MyLibClass.<init>(MyLibClass.kt)
        at ru.bartwell.app.MainActivity.onCreate(MainActivity.java:15)
        at android.app.Activity.performCreate(Activity.java:6251)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "kotlin.jvm.internal.Intrinsics" on path: DexPathList[[zip file "/data/app/ru.bartwell.app-1/base.apk"],nativeLibraryDirectories=[/data/app/ru.bartwell.app-1/lib/arm, /vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        at ru.bartwell.mylib.MyLibClass.<init>(MyLibClass.kt) 
        at ru.bartwell.app.MainActivity.onCreate(MainActivity.java:15) 
        at android.app.Activity.performCreate(Activity.java:6251) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
        at android.app.ActivityThread.-wrap11(ActivityThread.java) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:148) 
        at android.app.ActivityThread.main(ActivityThread.java:5417) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
        Suppressed: java.lang.ClassNotFoundException: kotlin.jvm.internal.Intrinsics
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                ... 15 more
     Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

这是我的 Gradle 文件:

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'

android {
    compileSdkVersion 27

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:27.1.0'
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}
repositories {
    mavenCentral()
}

如何解决？

更新:当我将 implementation "org.jetbrains.kotlin:kotlin-stdlib:1.2.31" 添加到应用程序 gradle 文件时，它可以正常工作而不会崩溃。但我不希望我图书馆的用户每次都需要添加它。

Answer 1

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

应该是

api "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"