Android Unity Gradle构建失败。dex异常：多个dex文件定义

我想制作一个Unity应用程序，显示Admob的横幅广告。接下来，我添加了Admob Unity插件。但是，在建筑上发生以下错误

这是控制台：

CommandInvokationFailure: Gradle build failed. 
/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java -classpath "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/gradle-launcher-4.0.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx2048m" "assembleRelease"

stderr[
/Users/yuukimatsushima/work/unity/BreakPlates2/Temp/gradleOut/src/main/AndroidManifest.xml:25:13-35 Error:
 Attribute meta-data#android.support.VERSION@value value=(26.1.0) from [:com.android.support.customtabs-26.1.0:] AndroidManifest.xml:25:13-35
 is also present at [:support-compat-26.0.2:] AndroidManifest.xml:28:13-35 value=(26.0.2).
 Suggestion: add 'tools:replace="android:value"' to <meta-data> element at AndroidManifest.xml:23:9-25:38 to override.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':processReleaseManifest'.
> Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(26.1.0) from [:com.android.support.customtabs-26.1.0:] AndroidManifest.xml:25:13-35
   is also present at [:support-compat-26.0.2:] AndroidManifest.xml:28:13-35 value=(26.0.2).
   Suggestion: add 'tools:replace="android:value"' to <meta-data> element at AndroidManifest.xml:23:9-25:38 to override.
...

CommandInvokationFailure: Gradle build failed. 
/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java -classpath "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/gradle-launcher-4.2.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx2048m" "assembleRelease"

stderr[

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':transformDexWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/google/android/gms/common/api/zzd;
...

请告诉我如何解决此错误。 提前谢谢

注:

---

Unity版本：2018.2.6f1个人版

检查Android studio中的外部库，并将build.gradle设置添加到此代码中

实现文件树（包括：['*.jar']，目录：“libs”，排除：['classes.jar']）
compileOnly文件（'libs/classes.jar'）

---

（classes.jar是文件名包括com/google/android/gms/common/api/zzd）

最后我自己解决了这个错误。在我的例子中，以下解决方案奏效了

统一>文件>生成设置>导出

在Android项目中，删除libs中的所有.jar和.aar，除了 unity-classes.jar和NcmbGcmPlugins.arr

编辑build.gradle

跑

这是build.gradle（应用程序级）

---

从unity论坛找到了适合我的解决方案。将构建系统从渐变更改为内部

参考文献

来自sRn " 嘿 我希望这是Unity的错误，并在某个时候得到解决，因为我在将我的项目更新到2018.2.1f1 Unity版本后开始出现这个错误。 要解决这个问题，您可以尝试启用Multidex，但在启用之后，我又遇到了另一个问题，因此我不再麻烦，而是返回到2018.1.x，这对我来说很好。 另外，您可以将构建系统从Gradle更改为Internal（在文件->构建设置->构建系统中），这对我来说也很有效，但我想留在Gradle以获得更多的控制权，因此回到2018.1版更有意义。

---

“

我通过以下方法解决了错误： 服务->广告->高级->取消选中：启用内置广告扩展

---

学分：

谢谢您的回答。你是说“unity classes.jar”吗？我将“classes.jar”替换为“unity classes.jar”，并将我的build.gradle添加到您的代码中，但出现了与我上面提到的相同的错误。构建设置中的导出选项在哪里

CommandInvokationFailure: Gradle build failed. 
/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java -classpath "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/gradle-launcher-4.2.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx2048m" "assembleRelease"

stderr[

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':transformDexWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/google/android/gms/common/api/zzd;
...

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN

buildscript {
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
    }
}

allprojects {
    repositories {
        flatDir {
            dirs 'libs'
        }
        // EDIT: added following 3 lines.
        maven {
            url "https://maven.google.com"
        }
    }
}

apply plugin: 'com.android.application'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation(name: 'NcmbGcmPlugin', ext:'aar')
//    implementation(name: 'android.arch.lifecycle.runtime-1.0.0', ext:'aar')  // EDIT: removed
//    implementation(name: 'com.android.support.customtabs-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-compat-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-core-ui-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-core-utils-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-fragment-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-media-compat-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.android.support.support-v4-26.1.0', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-ads-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-ads-base-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-ads-identifier-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-ads-lite-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-basement-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'com.google.android.gms.play-services-gass-15.0.1', ext:'aar') // EDIT: removed
//    implementation(name: 'play-services-base-11.0.0', ext:'aar') // EDIT: removed
//    implementation(name: 'play-services-basement-11.0.0', ext:'aar') // EDIT: removed
//    implementation(name: 'play-services-gcm-11.0.0', ext:'aar') // EDIT: removed
//    implementation(name: 'play-services-iid-11.0.0', ext:'aar') // EDIT: removed
//    implementation(name: 'play-services-tasks-11.0.0', ext:'aar') // EDIT: removed
//    implementation(name: 'support-compat-26.0.2', ext:'aar') // EDIT: removed
//    implementation(name: 'support-core-utils-26.0.2', ext:'aar') // EDIT: removed
//    implementation(name: 'support-v4-26.0.2', ext:'aar') // EDIT: removed

    implementation 'com.android.support:support-v4:26.1.0' // EDIT: added
    implementation 'com.google.android.gms:play-services-ads:15.0.1' // EDIT: added

    implementation project(':GoogleMobileAdsPlugin')
    implementation project(':unity-android-resources')

}

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.0'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 28
        applicationId 'blue.macho.breakplates2'
        ndk {
            abiFilters 'armeabi-v7a', 'x86'
        }
        versionCode 1
        versionName '1.0'
    }
    // ...
}