Java AnnotationProcessor can not generate code with gradle 5.1.1

Question

I write an annotation processor following this blog, the code has no problem, but it just can not generate the file, then I found out is the Gradle version.

my Gradle setting :

root -> build.gradle:

dependencies {
    classpath 'com.android.tools.build:gradle:3.4.2'
}

gradle/wrapper/gradle-wrapper.properties:

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

So, when I downgrade the Gradle version to 4.6, everything is fine.

my changed Gradle setting:

root -> build.gradle:

dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'
}

gradle/wrapper/gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

I looked up the doc about Gradle 5.x, got nothing. Is there some changed behavior can cause this problem?

What should I do when I want to use Gradle 5.x?

Dante · Accepted Answer · 2019-07-18 15:40:26Z

3

I had this same problem on upgrade of Android Studio (3.3 -> 3.4) (This upgrades gradle from 4.10.1 -> 5.1.1). Not 4.6 exactly but I noticed no breaking change from 4.6 -> 4.10 so I assume the following will work. I'm using kapt, and an annotation processor I built as a java module. Everything worked fine before the update.

My solution was:
- Upgrade com.google.auto.service:auto-service to 1.0-rc6
- Add annotationProcessor "com.google.auto.service:auto-service:1.0-rc6" to the annotation processor's build.gradle file.

Found my answer via these:
- https://github.com/gradle/gradle/issues/7941
- https://github.com/ishaigor/annotation-processor-sample/commit/d7645914b9f53a5f350c7098973f3554c48e75d8

Hope this helps.

answered Jul 18, 2019 at 15:40

Dante

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1 Comment

a5right Over a year ago

thanks. implementation 'com.google.auto.service:auto-service:1.0-rc5' add this line to processor's gradle file : annotationProcessor 'com.google.auto.service:auto-service:1.0-rc5' it works!!!

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