After updating Android Studio to version 2.2 and the Gradle-plugin to 2.2.0, I get following error:
You may rewrite your task a bit and try like this:
task renameBuildTask() << {
file('build/outputs/apk/app-release.apk').renameTo("AppName-1.0.0-${project.ext.androidVersionCode}.apk")
dependsOn 'assembleRelease'
}
Also you can check this question to get better understanding.
EDIT
As @tangens said in a comment:
It works when I replace the call gradle assemble by e.g. gradle renameBuildTask. Thank you! The answer contains an error. Correct would be: task renameBuildTask() << { ... }