title: Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease
body: <p>I'm trying to sign my app for release and it builds correctly, but i want to enable <code>Proguard</code> I'm getting the following error </p>
  
  <pre><code>Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease
  </code></pre>
  
  <p>my gradle file</p>
  
  <pre><code>    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'
  
  }
  </code></pre>
  
  <p>and my ProGuard rules files </p>
  
  <pre><code>    -keep class butterknife.** { *; }
  -dontwarn butterknife.internal.**
  -keep class **$$ViewBinder { *; }
  
  -keepclasseswithmembernames class * {
      @butterknife.* &lt;fields&gt;;
  }
  
  -keepclasseswithmembernames class * {
      @butterknife.* &lt;methods&gt;;
  }
  </code></pre>
  
  <p>and here is the stacktrace </p>
  
  <pre><code> 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
  </code></pre>
  
  <p>and this Gdoc contain all the warning that i got 
  <a href="https://docs.google.com/document/d/1YxbOfqaUyHJivYrs1hkHE4Tmmo4xAP8-aJkUJJB8e-k/edit?usp=sharing" rel="noreferrer">https://docs.google.com/document/d/1YxbOfqaUyHJivYrs1hkHE4Tmmo4xAP8-aJkUJJB8e-k/edit?usp=sharing</a></p>
  
  <p>Thanks</p>