I exported Unity (2020.3) project to Android project and then imported it into Android Studio, but following error occurred when building using gradle.
Execution failed for task ':unityLibrary:unity-android-resources:compileDebugJavaWithJavac'.
Failed to calculate the value of task ':unityLibrary:unity-android-resources:compileDebugJavaWithJavac' property 'options.generatedSourceOutputDirectory'.
Querying the mapped value of map(java.io.File property(org.gradle.api.file.Directory, fixed(class org.gradle.api.internal.file.DefaultFilePropertyFactory$FixedDirectory, /home/gbstack/Unity/Projects/ads-test/android-export/unityLibrary/unity-android-resources/build/generated/ap_generated_sources/debug/out)) org.gradle.api.internal.file.DefaultFilePropertyFactory$ToFileTransformer@481ca56c) before task ':unityLibrary:unity-android-resources:compileDebugJavaWithJavac' has completed is not supported
The exception detail is following:
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org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':unityLibrary:unity-android-resources:compileDebugJavaWithJavac'. at org.gradle.api.internal.tasks.properties.DefaultTaskProperties.resolve(DefaultTaskProperties.java:82) at org.gradle.execution.plan.LocalTaskNode.resolveMutations(LocalTaskNode.java:200) ... Caused by: org.gradle.api.InvalidUserCodeException: Querying the mapped value of map(java.io.File property(org.gradle.api.file.Directory, fixed(class org.gradle.api.internal.file.DefaultFilePropertyFactory$FixedDirectory, /home/gbstack/Unity/Projects/ads-test/android-export/unityLibrary/unity-android-resources/build/generated/ap_generated_sources/debug/out)) org.gradle.api.internal.file.DefaultFilePropertyFactory$ToFileTransformer@481ca56c) before task ':unityLibrary:unity-android-resources:compileDebugJavaWithJavac' has completed is not supported at org.gradle.api.internal.provider.TransformBackedProvider.lambda$beforeRead$0(TransformBackedProvider.java:84) at org.gradle.api.internal.provider.ValueSupplier$TaskProducer.visitContentProducerTasks(ValueSupplier.java:136) at org.gradle.api.internal.provider.TransformBackedProvider.beforeRead(TransformBackedProvider.java:81) at org.gradle.api.internal.provider.TransformBackedProvider.calculateOwnValue(TransformBackedProvider.java:63) at org.gradle.api.internal.provider.AbstractMinimalProvider.calculateValue(AbstractMinimalProvider.java:103) ... |
Since it's saying that some operation is not supported, so it may be a compatibility problem because of gradle version.
Solution
Changing gradle from 7.1 to version to 6.x will fix this problem. I tried both gradle 6.1 and 6.9, and both works