[에러] 갑자기 멀티덱스를 활성화라고 에러가 뜬다면?

 

상황

google_map_flutter 와 Geolocator 플러그인을 사용해서 유저의 위치 서비스 권한을 요청하려던 개발을 진행을 하다가 앱 시작이 잘 되었던 프로젝트가 갑자기 ERROR:D8 이라는 에러를 출력한다면?

 

에러내용

ERROR:D8: Cannot fit requested classes in a single dex file (# methods: 70980 > 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:151)
at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:138)
at com.android.build.gradle.internal.tasks.DexMergingWorkAction.merge(DexMergingTask.kt:859)
at com.android.build.gradle.internal.tasks.DexMergingWorkAction.run(DexMergingTask.kt:805)
at com.android.build.gradle.internal.profile.ProfileAwareWorkAction.execute(ProfileAwareWorkAction.kt:74)
at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:66)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:62)
at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:62)
at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:59)
at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$2(DefaultWorkerExecutor.java:205)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:187)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.access$700(DefaultConditionalExecutionQueue.java:120)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner$1.run(DefaultConditionalExecutionQueue.java:162)
at org.gradle.internal.Factories$1.create(Factories.java:31)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:270)
at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:119)
at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:124)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:157)
at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:126)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, position: null
at Version.fakeStackEntry(Version_3.1.66.java:0)
at com.android.tools.r8.internal.pO0.a(SourceFile:68)
at com.android.tools.r8.internal.pO0.a(SourceFile:28)
at com.android.tools.r8.internal.pO0.a(SourceFile:27)
at com.android.tools.r8.internal.pO0.b(SourceFile:3)
at com.android.tools.r8.D8.run(D8.java:11)
at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:136)
... 38 more
Caused by: com.android.tools.r8.internal.b: Cannot fit requested classes in a single dex file (# methods: 70980 > 65536)
at com.android.tools.r8.internal.jl1.a(SourceFile:14)
at com.android.tools.r8.internal.jl1.a(SourceFile:22)
at com.android.tools.r8.dex.T.a(SourceFile:58)
at com.android.tools.r8.dex.O.a(SourceFile:7)
at com.android.tools.r8.dex.e.a(SourceFile:14)
at com.android.tools.r8.dex.e.c(SourceFile:36)
at com.android.tools.r8.D8.d(D8.java:187)
at com.android.tools.r8.D8.b(D8.java:1)
at com.android.tools.r8.internal.pO0.a(SourceFile:24)
... 41 more


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeExtDexDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.DexMergingTaskDelegate
   > There was a failure while executing work items
      > A failure occurred while executing com.android.build.gradle.internal.tasks.DexMergingWorkAction
         > 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 4s
[!] App requires Multidex support
    Multidex support is required for your android app to build since the number of methods has exceeded 64k. See https://docs.flutter.dev/deployment/android#enabling-multidex-support for more information. You may pass the --no-multidex flag to skip Flutter's multidex support to use a manual solution.

    Flutter tool can add multidex support. The following file will be added by flutter:

        android/app/src/main/java/io/flutter/app/FlutterMultiDexApplication.java

cannot prompt without a terminal ui
Exception: Gradle task assembleDebug failed with exit code 1

 

해결방법

 

1) minSdkVersion 을 변경하고, multiDex는 활성화 해줘라!

defaultConfing {
	...
    minSdkVersion 21
    ...
    multiDexEnabled true    
}

2) multidex 라이브러리를 종속성에 추가해준다.

dependencies {
	implementation 'com.android.support:multidex:1.0.3'
}

3) 디버그 모드에 대해 최소 SDK 21 로 변경하고 릴리즈를 위해  기존 버전을 남겨둔다. 그렇다면, 빌드 시간이 증가하지 않고 잘 작동한다.

buildTypes {
	release {
    	...
        debug {defaultConfig.minSdkVersion 21}
    }
}

원인) 

안드로이드는 파일 한개당 int 크기 만큼의 함수, 프레임워크,라이브러리를 가질수 있는데, Int의 크기를 초과를 하게 되면 반드시 멀티덱스가 필요하다고 하다. SDK 21 이상이라면, 멀티덱스를 활성화시켜주면 된다, SDK 21 미만이라면 멀티덱스 라이브러리를 종속성에 추가해줘야한다. 

 

참고)

 

[Solved] Flutter Firestore causing D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536)