我在构建已签名的apk时遇到错误。我做了很多事情，但没有任何帮助......我将发布错误的消息。也许是我的错？
Information:Gradle tasks [:app:assembleRelease]
:app:preBuild UP-TO-DATE
:app:preReleaseBuild UP-TO-DATE
:app:checkReleaseManifest
:app:preDebugBuild UP-TO-DATE
:app:prepareComAndroidSupportAnimatedVectorDrawable2340Library UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72340Library UP-TO-DATE
:app:prepareComAndroidSupportDesign2340Library UP-TO-DATE
:app:prepareComAndroidSupportMediarouterV72300Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72340Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42340Library UP-TO-DATE
:app:prepareComAndroidSupportSupportVectorDrawable2340Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServices902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAds902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAdsLite902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAnalytics902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAnalyticsImpl902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppindexing902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppinvite902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAuth902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAuthBase902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBase902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBasement902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesCast902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesDrive902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesFitness902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGames902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGcm902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesIdentity902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesIid902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesLocation902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesMaps902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesNearby902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPanorama902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPlus902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesSafetynet902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesTagmanager902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesTagmanagerApi902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesTasks902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesVision902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWallet902Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWearable902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseAnalytics902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseAnalyticsImpl902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseAuth902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseAuthCommon902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseAuthModule902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseCommon902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseConfig902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseCrash902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseDatabase902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseDatabaseConnection902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseIid902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseMessaging902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseStorage902Library UP-TO-DATE
:app:prepareComGoogleFirebaseFirebaseStorageCommon902Library UP-TO-DATE
:app:prepareReleaseDependencies
:app:compileReleaseAidl
:app:compileReleaseRenderscript
:app:generateReleaseBuildConfig
:app:mergeReleaseShaders
:app:compileReleaseShaders
:app:generateReleaseAssets
:app:mergeReleaseAssets
:app:generateReleaseResValues
:app:generateReleaseResources
:app:mergeReleaseResources
:app:processReleaseManifest
:app:processReleaseResources
:app:generateReleaseSources
:app:incrementalReleaseJavaCompilationSafeguard
:app:compileReleaseJavaWithJavac
:app:compileReleaseJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
:app:compileReleaseNdk UP-TO-DATE
:app:compileReleaseSources
:app:lintVitalRelease
:app:prePackageMarkerForRelease
:app:transformClassesWithDexForRelease
To run dex in process, the Gradle daemon needs a larger heap.
It currently has approximately 910 MB.
For faster builds, increase the maximum heap size for the Gradle daemon to more than 2048 MB.
To do this set org.gradle.jvmargs=-Xmx2048M in the project gradle.properties.
For more information see https://docs.gradle.org/current/userguide/build_environment.html
Error: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
:app:transformClassesWithDexForRelease FAILED
Error:Execution failed for task ':app:transformClassesWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java'' finished with non-zero exit value 2
Information:BUILD FAILED
Information:Total time: 2 mins 41.454 secs
Information:2 errors
Information:0 warnings
Information:See complete output in console
这些是错误
错误1：
Error: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
错误2：
Error:Execution failed for task ':app:transformClassesWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java'' finished with non-zero exit value 2
我希望有人能帮助我解决这个可怕的错误
答案 0 :(得分：1)
错误1明确说明原因是什么。这是解决方案
查看应用的直接和传递依赖关系 - 确保您在应用中包含的任何大型库依赖关系的使用方式超过了添加到应用程序的代码量。一个常见的反模式是包含一个非常大的库，因为一些实用方法是有用的。减少应用程序代码依赖性通常可以帮助您避免dex参考限制。
使用ProGuard删除未使用的代码 - 为应用程序配置ProGuard设置以运行ProGuard，并确保为发布版本启用了收缩功能。启用收缩可确保您不会使用APK发送未使用的代码。
同样在build.gradle中添加此
defaultConfig {
// Other settings here
multiDexEnabled true
}