D8：无法在单个 dex 文件中容纳请求的类答案

【问题标题】：D8: Cannot fit requested classes in a single dex fileD8：无法在单个 dex 文件中容纳请求的类
【发布时间】：2020-09-25 03:12:03
【问题描述】：

我正在尝试添加以下依赖项：

  firebase_auth: ^0.14.0+5
  google_sign_in: ^4.0.7
  cloud_firestore: ^0.12.9+5
  fluttertoast: ^3.1.3
  image_picker: ^0.6.1+8
  shared_preferences: ^0.5.3+4
  firebase_storage: ^3.0.6
  cached_network_image: 2.0.0-rc.1
  firebase_messaging: 6.0.13
  flutter_local_notifications: 1.4.0
  photo_view: ^0.5.0

我发现了这个错误：

D8: Cannot fit requested classes in a single dex file (# methods: 85948 > 65536)
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:      
The number of method references in a .dex file cannot exceed 64K.       
Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html
        at com.android.builder.dexing.D8DexArchiveMerger.getExceptionToRethrow(D8DexArchiveMerger.java:131)
        at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:118)
        at com.android.build.gradle.internal.transforms.DexMergerTransformCallable.call(DexMergerTransformCallable.java:102)
        at com.android.build.gradle.internal.tasks.DexMergingTaskRunnable.run(DexMergingTask.kt:444)
        at com.android.build.gradle.internal.tasks.Workers$ActionFacade.run(Workers.kt:335)
        at org.gradle.workers.internal.AdapterWorkAction.execute(AdapterWorkAction.java:50)
        at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:47)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1$1.create(NoIsolationWorkerFactory.java:65)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1$1.create(NoIsolationWorkerFactory.java:61)
        at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:98)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.execute(NoIsolationWorkerFactory.java:61)
        at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
        at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
        at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:56)
        at org.gradle.workers.internal.DefaultWorkerExecutor$3.call(DefaultWorkerExecutor.java:215)
        at org.gradle.workers.internal.DefaultWorkerExecutor$3.call(DefaultWorkerExecutor.java:210)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:215)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
        at java.lang.Thread.run(Thread.java:748)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete
        at com.android.tools.r8.utils.t.a(:55)
        at com.android.tools.r8.D8.run(:11)
        at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:116)
        ... 34 more
Caused by: com.android.tools.r8.utils.AbortException: Error: null, Cannot fit requested classes in a single dex file (# methods: 85948 > 65536)
        at com.android.tools.r8.utils.Reporter.a(:21)
        at com.android.tools.r8.utils.Reporter.a(:7)
        at com.android.tools.r8.dex.VirtualFile.a(:33)
        at com.android.tools.r8.dex.VirtualFile$h.a(:5)
        at com.android.tools.r8.dex.ApplicationWriter.a(:13)
        at com.android.tools.r8.dex.ApplicationWriter.write(:35)        
        at com.android.tools.r8.D8.d(:44)
        at com.android.tools.r8.D8.b(:1)
        at com.android.tools.r8.utils.t.a(:23)
        ... 36 more


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeDexDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: 
     The number of method references in a .dex file cannot exceed 64K.
     Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 51s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                        53.6s
[!] The shrinker may have failed to optimize the Java bytecode.
    To disable the shrinker, pass the `--no-shrink` flag to this command.
    To learn more, see: https://developer.android.com/studio/build/shrink-code
Exception: Gradle task assembleDebug failed with exit code 1

这是我完整的pubspec.yaml

name: aradi_online_vtwo
description: A new Flutter project.
https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  provider: ^3.0.0
  intl: ^0.15.8
  flutter_speed_dial: ^1.2.1
  font_awesome_flutter: ^8.5.0
  smooth_star_rating: ^1.0.3
  firebase_auth: ^0.14.0+5
  google_sign_in: ^4.0.7
  cloud_firestore: ^0.12.9+5
  fluttertoast: ^3.1.3
  image_picker: ^0.6.1+8
  shared_preferences: ^0.5.3+4
  firebase_storage: ^3.0.6
  cached_network_image: 2.0.0-rc.1
  firebase_messaging: 6.0.13
  flutter_local_notifications: 1.4.0
  photo_view: ^0.5.0

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  assets:
    - assets/images/
    - assets/design_course/
    - assets/fitness_app/
    - assets/hotel/

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  fonts:
    - family: WorkSans
      fonts:
        - asset: assets/fonts/WorkSans-Regular.ttf
        - asset: assets/fonts/WorkSans-Medium.ttf
          weight: 500
        - asset: assets/fonts/WorkSans-SemiBold.ttf
          weight: 600
        - asset: assets/fonts/WorkSans-Bold.ttf
          weight: 700
    - family: Roboto
      fonts:
        - asset: assets/fonts/Roboto-Bold.ttf
        - asset: assets/fonts/Roboto-Regular.ttf
        - asset: assets/fonts/Roboto-Medium.ttf
          weight: 400
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

那么我该如何解决这个问题呢？

【问题讨论】：

标签： android flutter dart

【解决方案1】：

将 multiDex 添加到您的应用级 build.gradle 文件中。在 defaultConfig 下添加这一行

multiDexEnabled true

然后在依赖项中添加multidex并检查版本

implementation 'androidx.multidex:multidex: 2.0.1'

【讨论】：

我只尝试了“multiDexEnabled”，并且成功了。但我认为没有必要。只需设置“minSdkVersion 21”即可为您完成这项工作。
这可能是一个新的发展，但上面的答案允许您使用具有上述 65,536 种方法的引用库。可能是 android 生成问题。
好答案............

【解决方案2】：

所以基本上当您的应用及其引用的库超过 65,536 个方法时会发生此错误，构建错误仅表示您的应用已达到 Android 构建架构的限制，因此要修复此问题，请转到 android/app/build.gradle 目录并添加multiDexEnabled true 和 implementation 'com.android.support:multidex:2.0.1' 这样的方式

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        ........
        multiDexEnabled true
    }


dependencies {
    ...........
    implementation 'com.android.support:multidex:2.0.1'
}

当然还要重新启动您的 android-studio 或您正在使用的平台。

【讨论】：

【解决方案3】：

将 min sdk 升级到 21

我遇到了同样的问题，Multi dex 无法解决它我正在通过将 min sdk 升级到 21 来解决它

 defaultConfig {
    ...
    minSdkVersion 21
    targetSdkVersion 30
    multiDexEnabled
}



 dependencies {
     ...
    implementation 'androidx.multidex:multidex:2.0.1'
}

【讨论】：

您只需按照官方 Firebase 团队在 04:45 youtube.com/watch?v=EXp0gq9kGxI 的视频中的解释将 minSdkVersion 更新为 21。你不需要implementation 'androidx.multidex:multidex:2.0.1'
multiDexEnabled true 够了，改成minSdkVersion 21
通过简单地将 minSdkVersion 更改为 21 为我解决了问题。无需其他更改。