Error: execution completed for task ': app: transformClassesAndResourcesWithProguardForRelease

Question

I am trying to sign my release application and it is building correctly, but I want to enable Proguard . I get the following error.

 Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease 

my gradle file

  buildTypes { release { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } lintOptions { disable 'InvalidPackage' } packagingOptions { exclude 'META-INF/services/javax.annotation.processing.Processor' exclude 'META-INF/DEPENDENCIES.txt' exclude 'META-INF/LICENSE.txt' exclude 'META-INF/NOTICE.txt' exclude 'META-INF/NOTICE' exclude 'META-INF/LICENSE' exclude 'META-INF/DEPENDENCIES' exclude 'META-INF/notice.txt' exclude 'META-INF/license.txt' exclude 'META-INF/dependencies.txt' exclude 'META-INF/LGPL2.1' } } repositories { mavenCentral() jcenter() maven { url 'https://esri.bintray.com/arcgis' } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile 'junit:junit:4.12' compile project(':StickyListHeaders') compile files('libs/org.apache.commons.io.jar') compile files('libs/json-20140107.jar') compile project(':ParallaxEverywhere') compile files('libs/nineoldandroids-2.4.0.jar') compile files('libs/gson-2.5.jar') compile project(':FlowLayout') compile 'com.android.support:design:23.2.0' compile 'com.android.support:appcompat-v7:23.2.0' compile 'com.jakewharton:butterknife:7.0.1' compile 'com.android.support:support-v4:23.2.0' compile 'com.android.support:recyclerview-v7:23.2.0' compile 'com.android.support:cardview-v7:23.2.0' compile 'com.esri.arcgis.android:arcgis-android:10.2.7' compile 'jp.wasabeef:blurry:1.0.5' compile 'com.github.bumptech.glide:glide:3.6.1' compile 'com.makeramen:roundedimageview:2.2.1' compile 'com.daimajia.easing:library: 1.0.1@aar ' compile 'com.daimajia.androidanimations:library: 1.1.3@aar ' compile 'org.apache.commons:commons-lang3:3.1' compile 'com.lifeofcoding:cacheutilslibrary: 1.0.1@aar ' compile 'com.edmodo:rangebar:1.0.0' } 

and my ProGuard rule files

  -keep class butterknife.** { *; } -dontwarn butterknife.internal.** -keep class **$$ViewBinder { *; } -keepclasseswithmembernames class * { @butterknife.* <fields>; } -keepclasseswithmembernames class * { @butterknife.* <methods>; } 

and here is stacktrace

  Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46) at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35) at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64) at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53) at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185) at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66) at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110) at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37) at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23) at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43) at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30) at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:154) at org.gradle.internal.Factories$1.create(Factories.java:22) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52) at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151) at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32) at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:99) at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62) at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93) at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:82) at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94) at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28) at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78) at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:48) at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51) at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28) at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43) at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:170) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22) at org.gradle.launcher.Main.doAction(Main.java:33) at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45) at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54) at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35) at org.gradle.launcher.GradleMain.main(GradleMain.java:23) at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:30) at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:129) at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61) Caused by: java.lang.RuntimeException: java.io.IOException: Please correct the above warnings first. at com.android.builder.tasks.Job.awaitRethrowExceptions(Job.java:79) at com.android.build.gradle.internal.transforms.ProGuardTransform.transform(ProGuardTransform.java:209) at com.android.build.gradle.internal.pipeline.TransformTask$3.call(TransformTask.java:178) at com.android.build.gradle.internal.pipeline.TransformTask$3.call(TransformTask.java:174) at com.android.builder.profile.ThreadRecorder$1.record(ThreadRecorder.java:55) at com.android.builder.profile.ThreadRecorder$1.record(ThreadRecorder.java:47) at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:173) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:244) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:220) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:231) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:209) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61) ... 60 more Caused by: java.io.IOException: Please correct the above warnings first. at proguard.Initializer.execute(Initializer.java:473) at proguard.ProGuard.initialize(ProGuard.java:233) at proguard.ProGuard.execute(ProGuard.java:98) at com.android.build.gradle.internal.transforms.BaseProguardAction.runProguard(BaseProguardAction.java:52) at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:273) at com.android.build.gradle.internal.transforms.ProGuardTransform.access$000(ProGuardTransform.java:62) at com.android.build.gradle.internal.transforms.ProGuardTransform$1.run(ProGuardTransform.java:199) at com.android.builder.tasks.Job.runTask(Job.java:51) at com.android.build.gradle.tasks.SimpleWorkQueue$EmptyThreadContext.runTask(SimpleWorkQueue.java:41) at com.android.builder.tasks.WorkQueue.run(WorkQueue.java:223) BUILD FAILED 

and this Gdoc contains all the warnings I received https://docs.google.com/document/d/1YxbOfqaUyHJivYrs1hkHE4Tmmo4xAP8-aJkUJJB8e-k/edit?usp=sharing

thanks

Answer 1

Based on the warnings you get, I see that you have library dependencies that rely on parts of the Java Runtime ( rt.jar ) but are not part of the Android runtime ( android.jar ), so the warnings you get from ProGuard.

If your application still works with all these missing components, you can configure ProGuard so that it does not warn you about this, so in the proguard configuration file (for example, proguard-project.txt ) you can try to add the following data:

 -dontwarn javax.servlet.** -dontwarn org.joda.time.** -dontwarn org.w3c.dom.** 

This should help you eliminate any additional warnings that may remain in your assembly:

ProGuard Guide> Troubleshooting> Warning: Cannot Find Reference Class