tried to access method com.google.common.io.Files.fileTreeTraverser() from class com.android.utils.FileUtils

Question

I am getting below error after merge support library in androidx.

Caused by: java.lang.IllegalAccessError: tried to access method com.google.common.io.Files.fileTreeTraverser()Lcom/google/common/collect/TreeTraverser; from class com.android.utils.FileUtils
    at com.android.utils.FileUtils.getAllFiles(FileUtils.java:394)
    at com.android.build.gradle.internal.transforms.StripDebugSymbolTransform.transform(StripDebugSymbolTransform.java:188)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
    at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:50)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:131)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:120)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:99)
    ... 31 more

This problem is occurred after androidx merge. looks like that the problem seems to be in accessing the method Files.fileTreeTraverser() from class FileUtils.

Any ideas why its coming and how to fix it, please?

Answer 1

I resolved issue by updating

• gradle build tool version

  classpath 'com.android.tools.build:gradle:3.4.2'

• gradle wrapper properties file

  distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip

• Kotlin version to 1.3.10 or higher

  classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.10"