I am trying to export apk and I want to enable Proguard but it throwing below error. I read so many answers and tried but didn't worked. Getting below error:
Warning:Exception while processing task java.io.IOException: java.lang.NullPointerException Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease StackTrace:
:app:transformClassesAndResourcesWithProguardForRelease ProGuard, version 5.2.1 Warning: Exception while processing task java.io.IOException: java.lang.NullPointerException :app:transformClassesAndResourcesWithProguardForRelease FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. > Job failed, see logs for details * Try: Run with --info or --debug option to get more log output. * 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:66) 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:153) at org.gradle.internal.Factories$1.create(Factories.java:22) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53) at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:150) at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32) at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98) at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63) at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92) at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83) at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99) 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:48) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30) at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81) at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46) 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$RunnableActionAdapter.execute(Actions.java:173) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:239) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:212) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35) at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:205) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169) 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:55) at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:36) 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: Job failed, see logs for details at com.android.build.gradle.internal.transforms.ProGuardTransform.transform(ProGuardTransform.java:196) at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:178) at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:174) at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156) at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:173) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:245) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:232) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210) 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: java.lang.NullPointerException at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:283) at com.android.build.gradle.internal.transforms.ProGuardTransform.access$000(ProGuardTransform.java:63) at com.android.build.gradle.internal.transforms.ProGuardTransform$1.run(ProGuardTransform.java:173) at com.android.builder.tasks.Job.runTask(Job.java:49) at com.android.build.gradle.tasks.SimpleWorkQueue$EmptyThreadContext.runTask(SimpleWorkQueue.java:41) at com.android.builder.tasks.WorkQueue.run(WorkQueue.java:223) Caused by: java.lang.NullPointerException at proguard.util.FixedStringMatcher.matches(FixedStringMatcher.java:52) at proguard.util.OrMatcher.matches(OrMatcher.java:46) at proguard.classfile.util.WarningPrinter.accepts(WarningPrinter.java:89) at proguard.classfile.util.WarningPrinter.print(WarningPrinter.java:77) at proguard.KeepClassMemberChecker.checkClassSpecifications(KeepClassMemberChecker.java:76) at proguard.ConfigurationChecker.check(ConfigurationChecker.java:136) at proguard.ProGuard.execute(ProGuard.java:73) at com.android.build.gradle.internal.transforms.BaseProguardAction.runProguard(BaseProguardAction.java:54) at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:254) ... 5 more Gradle file:
buildscript { repositories { maven { url 'https://maven.fabric.io/public' } } dependencies { classpath 'io.fabric.tools:gradle:1.+' } } apply plugin: 'com.android.application' apply plugin: 'io.fabric' repositories { maven { url 'https://maven.fabric.io/public' } } android { compileSdkVersion 25 buildToolsVersion "25" defaultConfig { applicationId "package_name" minSdkVersion 14 targetSdkVersion 25 versionCode 22 versionName "2.3.1" multiDexEnabled true } buildTypes { release { minifyEnabled true shrinkResources true debuggable false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' buildConfigField "String", "BASE_URL", "\"http://release.com/\"" } debug { testCoverageEnabled false minifyEnabled false shrinkResources false debuggable true versionNameSuffix '-dev' applicationIdSuffix '.dev' proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' buildConfigField "String", "BASE_URL", "\"http://test.com/\"" jackOptions { enabled false } } } productFlavors { } dexOptions { javaMaxHeapSize "2048M" jumboMode true } sourceSets { main { assets.srcDirs = ['src/main/assets', 'src/stage'] } stage { res.srcDirs = ['src/stage/res', 'src/main/res/mipmap', 'src/stage/res/mipmap', 'src/stage/res/values'] } release { java.srcDirs = ['src/release/java', 'src/release/java/'] } debug { res.srcDirs = ['src/debug/res', 'src/debug/res/drawable'] } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:25.1.0' compile "com.android.support:support-v4:25.0.0" compile 'com.android.support:design:25.0.0' compile 'com.android.support:multidex:1.0.1' compile 'com.android.volley:volley:1.0.0' compile 'com.squareup.picasso:picasso:2.5.2' compile 'com.google.android.gms:play-services-analytics:10.0.0' compile 'com.google.android.gms:play-services-gcm:10.0.0' compile 'com.github.freshdesk:hotline-android:1.1.+' compile 'com.appsflyer:af-android-sdk:4+@aar' compile('cn.trinea.android.view.autoscrollviewpager:android-auto-scroll-view-pager:1.1.2') { exclude module: 'support-v4' } compile('com.crashlytics.sdk.android:crashlytics:2.6.5@aar') { transitive = true; } compile 'com.pusher:pusher-java-client:1.4.0' } Proguard File:
# Add project specific ProGuard rules here. # By default, the flags in this file are appended to flags specified # in F:\android studio\android-sdk/tools/proguard/proguard-android.txt # You can edit the include path and order by changing the proguardFiles # directive in build.gradle. # # For more details, see # http://developer.android.com/guide/developing/tools/proguard.html # Add any project specific keep options here: # If your project uses WebView with JS, uncomment the following # and specify the fully qualified class name to the JavaScript interface # class: #-keepclassmembers class fqcn.of.javascript.interface.for.webview { # public *; #} # Add project specific ProGuard rules here. # By default, the flags in this file are appended to flags specified # in /Applications/Android Studio.app/sdk/tools/proguard/proguard-android.txt # You can edit the include path and order by changing the ProGuard # include property in project.properties. # # For more details, see # http://developer.android.com/guide/developing/tools/proguard.html # Add any project specific keep options here: # If your project uses WebView with JS, uncomment the following # and specify the fully qualified class name to the JavaScript interface # class: #-keepclassmembers class fqcn.of.javascript.interface.for.webview { # public *; #} # Obfuscation parameters: #-dontobfuscate -useuniqueclassmembernames -keepattributes SourceFile,LineNumberTable -allowaccessmodification # Ignore warnings: #-dontwarn org.mockito.** -dontwarn org.junit.** -keepclasseswithmembers class * { @junit.** *; } #-dontwarn com.robotium.** #-dontwarn org.joda.convert.** # Ignore warnings: We are not using DOM model -dontwarn com.fasterxml.jackson.databind.ext.DOMSerializer # Ignore warnings: https://github.com/square/okhttp/wiki/FAQs -dontwarn com.squareup.okhttp.internal.huc.** # Ignore warnings: https://github.com/square/okio/issues/60 -dontwarn okio.** # Ignore warnings: https://github.com/square/retrofit/issues/435 -dontwarn com.google.appengine.api.urlfetch.** # Keep the pojos used by GSON or Jackson -keep class com.futurice.project.models.pojo.** { *; } # Keep GSON stuff -keep class sun.misc.Unsafe { *; } -keep class com.google.gson.** { *; } # Keep Jackson stuff -keep class org.codehaus.** { *; } -keep class com.fasterxml.jackson.annotation.** { *; } # Keep these for GSON and Jackson -keepattributes Signature -keepattributes *Annotation* -keepattributes EnclosingMethod # Keep Retrofit -keep class retrofit.** { *; } -keepclasseswithmembers class * { @retrofit.** *; } -keepclassmembers class * { @retrofit.** *; } # Keep Picasso -keep class com.squareup.picasso.** { *; } -keepclasseswithmembers class * { @com.squareup.picasso.** *; } -keepclassmembers class * { @com.squareup.picasso.** *; } -keepclassmembers class * { @com.squareup.picasso.Utils.** *; } -keepattributes SourceFile,LineNumberTable -keep class com.parse.*{ *; } -dontwarn com.parse.** -dontwarn com.squareup.picasso.** -dontwarn com.demach.konotor.service.** -keepclasseswithmembernames class * { } -keep class javax.naming.** { *; } -keepclasseswithmembers class * { @javax.naming.** *; } -dontwarn javax.naming.** -keep class junit.** { *; } -keepclasseswithmembers class * { @junit.** *; } -dontwarn junit.** -keep public class * extends java.lang.Exception -keep public class * extends android.support.v7.app.ActionBarActivity -keep public class * extends android.app.Application -keep public class * extends android.app.Service -keep public class * extends android.content.BroadcastReceiver -keep public class * extends android.content.ContentProvider -keep public class * extends android.app.backup.BackupAgent -keep public class * extends android.preference.Preference -keep public class * extends android.support.v4.app.Fragment -keep public class * extends android.support.v4.app.DialogFragment -keep public class * extends android.app.Fragment -keep public class com.android.vending.licensing.ILicensingService # For native methods, see http://proguard.sourceforge.net/manual/examples.html#native -keepclasseswithmembernames class * { native ; } -keep public class * extends android.view.View { public (android.content.Context); public (android.content.Context, android.util.AttributeSet); public (android.content.Context, android.util.AttributeSet, int); public void set*(...); } -keepclasseswithmembers class * { public (android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public (android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } # For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; } -keepclassmembers class **.R$* { public static ; } -keep class android.support.v4.app.** { *; } -keep interface android.support.v4.app.** { *; } -keep class com.actionbarsherlock.** { *; } -keep interface com.actionbarsherlock.** { *; } # The support library contains references to newer platform versions. # Don't warn about those in case this app is linking against an older # platform version. We know about them, and they are safe. -dontwarn android.support.** -dontwarn com.google.ads.** -dontwarn com.google.android.gms.ads.** -keep class com.google.android.gms.ads.** { *; } -dontwarn com.demach.** -dontwarn com.freshdesk.hotline.** -keep class com.demach.** { *; } -keep class com.freshdesk.hotline.** { *; } #-keep class com.google.gson.demach.** { # *; #} # Application classes that will be serialized/deserialized over Gson -keep class cn.trinea.android.** { *; } -keepclassmembers class cn.trinea.android.** { *; } -dontwarn cn.trinea.android.** -keep class com.crashlytics.** { *; } -dontwarn com.crashlytics.** # For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } #volley -keep class org.apache.commons.logging.** -keep class com.android.volley.** { *; } -dontwarn com.android.volley.** #GAID -keep class * extends java.util.ListResourceBundle { protected Object[][] getContents(); } -keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable { public static final *** NULL; } -keepnames @com.google.android.gms.common.annotation.KeepName class * -keepclassmembernames class * { @com.google.android.gms.common.annotation.KeepName *; } -keepnames class * implements android.os.Parcelable { public static final ** CREATOR; } #pusher -keep class com.pusher.client.** { *; } -keepclassmembers class com.pusher.client.** { *; } -dontwarn com.pusher.client.** -keep class pusher.java.client.** { *; } -keepclassmembers class pusher.java.client.** { *; } -dontwarn pusher.java.client.** -dontwarn org.slf4j.** #GAID -keep public class com.google.** { *; } -dontwarn com.google.** -dontwarn com.appsflyer.AFKeystoreWrapper -dontwarn uk.co.chrisjenx.calligraphy.CalligraphyConfig -dontwarn uk.co.chrisjenx.calligraphy.CalligraphyUtils -dontwarn uk.co.chrisjenx.calligraphy.CalligraphyConfig -dontwarn uk.co.chrisjenx.calligraphy.CalligraphyUtils If anyone has any solution please share here.