我开发了一个使用 swagger 生成的 Java 客户端的应用程序。客户端在名为“api”的项目中，而应用程序在名为“app”的项目中。

当我通过 Build/Make Project 构建应用程序时，一切正常。此外，当我尝试在模拟或物理设备上运行该应用时 Run/Run 'app'。使用调试器运行也可以。即使当我通过 Buid/Generate Signed Bundle/APK 构建项目并选择调试选项时，它也能正常工作。

现在。当我尝试创建已签名的发布版本时，构建失败。以下消息显示:

Caused by: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: [...]\app\build\intermediates\transforms\dexBuilder\release\54, [...]\app\build\intermediates\transforms\externalLibsDexMerger\release\0, [...]\app\build\intermediates\transforms\dexBuilder\release\52.jar, [...]\app\build\intermediates\transforms\dexBuilder\release\53.jar

Caused by: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: [...]\app\build\intermediates\transforms\dexBuilder\release\54, [...]\app\build\intermediates\transforms\externalLibsDexMerger\release\0, [...]\app\build\intermediates\transforms\dexBuilder\release\52.jar, [...]\app\build\intermediates\transforms\dexBuilder\release\53.jar

Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete

Caused by: com.android.tools.r8.utils.AbortException: Error: Program type already present: io.swagger.client.ApiCallback

我对使用 Android Studio 和 Gradle 进行开发还很陌生。我在 Stack Overflow 上尝试了一些解决方案，这些解决方案已经建议添加一些库，但到目前为止，它们都没有解决我的问题。

对我来说，最后一条错误消息指向 io.swagger.client.ApiCallback 特别值得怀疑。

它与“api”和“app”的 settings.gradle 具有相同内容这一事实有什么关系吗？两者看起来像这样: rootProject.name = "swagger-java-client"。这是文件中唯一的一行，但据我所知，“app”的 settings.gradle 已经包含了该内容。我不记得更改过它，所以它显示“swagger-java-client”对我来说很奇怪。这正常吗？

更新1

评论中提到 ProGuard 可能是一个问题。这是我唯一能找到的引用它的事件。在我的“app”项目的 build.gradle 中，有这一部分:

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

然而，删除它并没有改变任何东西。

更新2

当搜索“io.swagger”时，AS 只找到这个:

当搜索“io.swagger.client.ApiCallback”时，AS 只找到这个:

更新3

按照建议，我尝试添加

android {
    defaultConfig {
        multiDexEnabled true
    }
}

并添加 android.enableD8 = false 但这也无济于事。

这是我的 build.gradle-Files(第一个导致问题的文件，没有我迄今为止尝试过的建议更正。)

build.gradle(模块:api)(由 Swagger 生成):

apply plugin: 'idea'
apply plugin: 'eclipse'

group = 'io.swagger'
version = '1.0.0'

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
    }
}

repositories {
    jcenter()
}


if(hasProperty('target') && target == 'android') {

    apply plugin: 'com.android.library'
    apply plugin: 'com.github.dcendents.android-maven'

    android {
        compileSdkVersion 25
        buildToolsVersion '25.0.2'
        defaultConfig {
            minSdkVersion 14
            targetSdkVersion 25
        }
        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_7
            targetCompatibility JavaVersion.VERSION_1_7
        }

        // Rename the aar correctly
        libraryVariants.all { variant ->
            variant.outputs.each { output ->
                def outputFile = output.outputFile
                if (outputFile != null && outputFile.name.endsWith('.aar')) {
                    def fileName = "${project.name}-${variant.baseName}-${version}.aar"
                    output.outputFile = new File(outputFile.parent, fileName)
                }
            }
        }

        dependencies {
            provided 'javax.annotation:jsr250-api:1.0'
        }
    }

    afterEvaluate {
        android.libraryVariants.all { variant ->
            def task = project.tasks.create "jar${variant.name.capitalize()}", Jar
            task.description = "Create jar artifact for ${variant.name}"
            task.dependsOn variant.javaCompile
            task.from variant.javaCompile.destinationDir
            task.destinationDir = project.file("${project.buildDir}/outputs/jar")
            task.archiveName = "${project.name}-${variant.baseName}-${version}.jar"
            artifacts.add('archives', task);
        }
    }

    task sourcesJar(type: Jar) {
        from android.sourceSets.main.java.srcDirs
        classifier = 'sources'
    }

    artifacts {
        archives sourcesJar
    }

} else {

    apply plugin: 'java'
    apply plugin: 'maven'

    sourceCompatibility = JavaVersion.VERSION_1_7
    targetCompatibility = JavaVersion.VERSION_1_7

    install {
        repositories.mavenInstaller {
            pom.artifactId = 'swagger-java-client'
        }
    }

    task execute(type:JavaExec) {
       main = System.getProperty('mainClass')
       classpath = sourceSets.main.runtimeClasspath
    }
}

dependencies {
    compile 'io.swagger:swagger-annotations:1.5.21'
    compile 'com.squareup.okhttp:okhttp:2.7.5'
    compile 'com.squareup.okhttp:logging-interceptor:2.7.5'
    compile 'com.google.code.gson:gson:2.8.2'
    compile 'org.threeten:threetenbp:1.3.5'
    testCompile 'junit:junit:4.12'
}

build.gradle(模块:应用程序):

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

repositories {
    maven { url 'https://maven.fabric.io/public' }
}

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "projectName"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "0.1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:design: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'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation fileTree(dir: '../api/build/libs', include: ['*.jar'])
    implementation 'com.google.code.gson:gson:2.8.2'
    implementation 'com.squareup.okhttp:okhttp:2.7.5'
    api project(path: ':api')
    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.8'
    implementation 'org.jetbrains:annotations-java5:15.0'
}

最佳答案

Here有一些解决方法:

• Can you please make sure you have multiDexEnabled set to true as shown below in your gradle settings:

  android {
      defaultConfig {
          multiDexEnabled true
      }
  }
  

• 在 grade.properties 中尝试 android.enableD8 = false

关于android - DexArchiveMergerException 仅在发布时出现，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54080193/