Question

我有一个应用程序，我使用retrolambda所以在build.gradle中我有

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

除非我添加对Kotlin的支持，否则一切都很好。添加Kotlin插件我收到以下错误：

错误：将字节码转换为dex时出错：原因：Dex无法解析版本52字节的代码。这是由使用Java 8或更高版本编译的库依赖项引起的。如果你正在使用＆＃39; java＆＃39;库子模块中的gradle插件添加 targetCompatibility =＆＃39; 1.7＆＃39; sourceCompatibility =＆＃39; 1.7＆＃39; 到该子模块的build.gradle文件。

我发现了许多与此类似的问题和答案，但不适用于我的案例。

这是我的build.gradle：

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
        mavenCentral()
    }
    dependencies {
        classpath 'me.tatarka:gradle-retrolambda:3.3.1'
        classpath 'io.fabric.tools:gradle:1.+'
    }
}

repositories {
    // Required because retrolambda is on maven central
    mavenCentral()
    maven { url 'https://maven.fabric.io/public' }
    maven { url 'https://maven.google.com' }
}

apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
apply plugin: 'realm-android'
apply plugin: 'com.neenbedankt.android-apt'
apply plugin: 'kotlin-android'

plugins {
    id "me.tatarka.retrolambda" version "3.3.1"
}

android {
    compileSdkVersion 25
    buildToolsVersion '25.0.2'
    compileOptions.incremental = false

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        multiDexEnabled true
        applicationId "mypackage"
        minSdkVersion 17
        targetSdkVersion 25
        versionCode 1
        versionName "0.1"
        vectorDrawables.useSupportLibrary = true
        jackOptions {
            enabled false
        }
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        dexOptions {
            preDexLibraries = false
            javaMaxHeapSize "4g"
        }
    }

    compileOptions {
        incremental true
    }


    buildTypes {
        release {
            debuggable false
            minifyEnabled true
            zipAlignEnabled true
            renderscriptDebuggable false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
        debug {
            debuggable true
            signingConfig signingConfigs.debug
            minifyEnabled false
            versionNameSuffix "_dev"
        }

    }
}

def supportVersion = '25.3.1'

dependencies {
    def daggerVer = 2.8
    apt "com.google.dagger:dagger-compiler:$daggerVer"
    compile "com.google.dagger:dagger:$daggerVer"
    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile 'com.android.support:multidex:1.0.1'

    compile "com.android.support:appcompat-v7:$supportVersion"
    compile "com.android.support:design:$supportVersion"
    compile "com.android.support:cardview-v7:$supportVersion"
    compile "com.android.support:recyclerview-v7:$supportVersion"
    compile "com.android.support:gridlayout-v7:$supportVersion"
    compile "com.android.support:support-annotations:$supportVersion"
    compile "com.android.support:preference-v7:$supportVersion"
    compile "com.android.support:support-v4:$supportVersion"
    compile "com.android.support:support-vector-drawable:$supportVersion"
    compile "com.android.support:palette-v7:$supportVersion"

    def firebase = '10.2.0'
    compile "com.google.firebase:firebase-crash:$firebase"
    compile "com.google.firebase:firebase-auth:$firebase"
    compile 'com.firebaseui:firebase-ui-auth:1.2.0'

    def rxbinding = '2.0.0'
    compile "com.jakewharton.rxbinding2:rxbinding:$rxbinding"
    compile "com.jakewharton.rxbinding2:rxbinding-support-v4:$rxbinding"
    compile "com.jakewharton.rxbinding2:rxbinding-appcompat-v7:$rxbinding"
    compile "com.jakewharton.rxbinding2:rxbinding-design:$rxbinding"
    compile "com.jakewharton.rxbinding2:rxbinding-recyclerview-v7:$rxbinding"
    compile "com.jakewharton.rxbinding2:rxbinding-leanback-v17:$rxbinding"

    compile 'joda-time:joda-time:2.5'
    compile 'com.ryanharter.auto.value:auto-value-parcel-adapter:0.2.5'
    compile 'com.jakewharton.timber:timber:4.3.1'
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile 'com.github.clans:fab:1.6.4'

    compile 'me.relex:circleindicator:1.2.2@aar'
    compile 'com.github.paolorotolo:appintro:4.1.0'

    //architecture
    compile "android.arch.lifecycle:runtime:1.0.0-alpha1"
    compile "android.arch.lifecycle:extensions:1.0.0-alpha1"
    annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"

    def retrofit2 = '2.2.0'
    def okhttp3 = '3.4.1'
    compile "com.squareup.retrofit2:retrofit:$retrofit2"
    compile "com.squareup.retrofit2:adapter-rxjava2:$retrofit2"
    compile "com.squareup.retrofit2:converter-gson:$retrofit2"
    compile "com.squareup.retrofit2:converter-scalars:$retrofit2"
    compile "com.squareup.okhttp3:okhttp:$okhttp3"
    compile "com.squareup.okhttp3:okhttp-urlconnection:$okhttp3"
    compile "com.squareup.okhttp3:logging-interceptor:$okhttp3"
    compile 'com.github.franmontiel:PersistentCookieJar:v1.0.1'

    compile 'com.github.MFlisar:RxBus2:0.1'

    def butter_knife = '8.4.0'
    apt "com.jakewharton:butterknife-compiler:$butter_knife"
    compile "com.jakewharton:butterknife:$butter_knife"

    def leak_canary = '1.4'
    debugCompile "com.squareup.leakcanary:leakcanary-android:$leak_canary"
    releaseCompile "com.squareup.leakcanary:leakcanary-android-no-op:$leak_canary"
    testCompile "com.squareup.leakcanary:leakcanary-android-no-op:$leak_canary"

    apt 'com.gabrielittner.auto.value:auto-value-with:1.0.0'
    apt 'com.google.auto.value:auto-value:1.2'
    apt 'com.ryanharter.auto.value:auto-value-parcel:0.2.5'
    apt 'com.ryanharter.auto.value:auto-value-gson:0.3.2-rc1'
    provided 'javax.annotation:jsr250-api:1.0'
    provided 'com.google.auto.value:auto-value:1.2'

    compile 'com.braintreepayments.api:drop-in:3.0.6'

    //other dependencies for testing
    def hamcrestVersion = '1.3'
    testCompile "org.hamcrest:hamcrest-core:$hamcrestVersion"
    testCompile "org.hamcrest:hamcrest-library:$hamcrestVersion"
    testCompile "org.hamcrest:hamcrest-integration:$hamcrestVersion"
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

    testCompile 'org.mockito:mockito-core:1.10.19'
    testCompile 'junit:junit:4.12'
    compile('com.crashlytics.sdk.android:crashlytics:2.6.8@aar') {
        transitive = true;
    }
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'org.jetbrains:annotations:15.0'
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    compile "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
}

apply plugin: 'com.google.gms.google-services'

android.packagingOptions {
    exclude 'LICENSE.txt'
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/rxjava.properties'

}

configurations.all {
    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
        def requested = details.requested
        if (requested.group == 'com.android.support') {
            if (!requested.name.startsWith("multidex")) {
                details.useVersion "$supportVersion"
            }
        }
    }
}

没有成功，我尝试了这个

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    sourceCompatibility = JavaVersion.VERSION_1_6
    targetCompatibility = JavaVersion.VERSION_1_6

    kotlinOptions {
        jvmTarget = '1.6'
        apiVersion = '1.1'
        languageVersion = '1.1'
    }
}

以及

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'
    }
}

更新对于使用1.8 for kotlin的最后一个版本，我现在得到一个不同的错误：

错误：任务＆＃39;：app：compileDebugKotlin＆＃39;执行失败。编译错误。有关更多详细信息，请参阅日志

我现在正在调查

这是我的顶级build.gradle

buildscript {
    ext.kotlin_version = '1.1.2-4'
    repositories {
        jcenter()
    }

    dependencies {
        classpath('com.android.tools.build:gradle:2.3.0') {
            force = true
        }
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle file
        classpath 'com.google.gms:google-services:3.0.0'
        classpath "io.realm:realm-gradle-plugin:2.1.1"
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url 'https://maven.fabric.io/public' }
        maven { url "https://jitpack.io" }
    }
}

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

Answer 1

Retrolambda不处理Kotlin字节码，你应该将Kotlin编译器设置为专门针对1.6字节码。这不会破坏当前版本的Kotlin中的任何内容，因为它可以生成相同功能的旧字节码。

compileKotlin {
    kotlinOptions.jvmTarget = "1.6"
}

Kotlin Gradle Plugin attributes

中记录了这一点

对于测试，还要添加：

compileTestKotlin {
    kotlinOptions.jvmTarget = "1.6"
}

java8和Kotlin出错

1 个答案: