Kotlin无法编译库 [英] Kotlin fails to compile a library

问题描述

我创建了一个此库，用于通过电子邮件报告异常.它可以与Android Java项目一起很好地工作，但不能与Android Kotlin一起工作.当我为库(compile 'com.theah64.bugmailer:bugmailer:1.1.9')添加编译脚本并尝试构建APK时，出现以下错误.

There's this library I created to report exceptions via email. It works well with the Android Java project but fails with Android Kotlin. When I add the compile script for the libary (compile 'com.theah64.bugmailer:bugmailer:1.1.9') and tries to build the APK, am getting below error.

Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
> com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

这是我应用程序的build.gradle文件

This is my app's build.gradle file

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.theapache64.calculator"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            multiDexEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    dexOptions {
        preDexLibraries = false
        javaMaxHeapSize "4g"
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.0.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:design:27.0.2'
    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'
    compile 'com.theah64.bugmailer:bugmailer:1.2.0'
}

我在Google上搜索了很多，并尝试了multiDexEnabled解决方案.但这是行不通的.

I've googled a lot and tried the multiDexEnabled solution. but it doesn't work.

推荐答案

您遇到的问题是由相互依赖的依赖项引起的，其中两个依赖项定义了相同的类.如果您尝试使用

The problem you are having is caused by conflicting dependencies, 2 of your dependencies are defining the same classes. If you try to compile with

./gradlew --stacktrace app:assembleDebug

您会看到此错误

Caused by: com.android.dex.DexException: Multiple dex files define Lorg/intellij/lang/annotations/MagicConstant;

现在，您可以使用来分析所有依赖关系树

Now, you can analyze all the dependency trees with

./gradlew app:dependencies

并查看这些内容(在此处简化):

And see these (simplified here):

+--- com.theah64.bugmailer:bugmailer:1.2.0
|    +--- org.jetbrains:annotations-java5:15.0

和

 +--- org.jetbrains.kotlin:kotlin-stdlib:1.2.30
 |    \--- org.jetbrains:annotations:13.0

因此，Kotlin std lib和bugmailer都使用org.jetbrains批注，但是它们来自2个不同的模块.这会导致问题，因为同一类(在这种情况下为MagicConstant)被定义了两次，我认为重复的条目会更多.

So, both Kotlin std lib and bugmailer are using org.jetbrains annotation, but from 2 different modules. This causes a problem because the same class (MagicConstant in that case) is being defined twice, I think that the duplicate entries would be even more.

解决方案是排除两个传递依赖项之一，例如

The solution would be to exclude one of the 2 transitive dependencies, for instance

compile('com.theah64.bugmailer:bugmailer:1.2.0') {
    exclude group: 'org.jetbrains', module: 'annotations-java5'
}

您将能够编译该应用程序，但是请记住，该解决方案基于以下假设:bugmailer可以在org.jetbrains:annotations:13.0而不是org.jetbrains:annotations-java5:15.0上正常使用

You will be able to compile the app, but, keep in mind that this solution is based on the assumption that bugmailer will work just fine with org.jetbrains:annotations:13.0 instead of org.jetbrains:annotations-java5:15.0

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