Could not find property 'outputFile' on com.android.build.gradle.internal.api.ApplicationVariantImpl

Solution 1:

try this

applicationVariants.all { variant ->
    variant.outputs.each { output ->
        def file = output.outputFile
        output.outputFile = new File(file.parent, file.name.replace(".apk", "-" + defaultConfig.versionName + ".apk"))
    }
}

Solution 2:

More comprehensively:

applicationVariants.all { variant ->
    variant.outputs.each  { output ->
        output.outputFile = new File(output.outputFile.parent, output.outputFile.name.replace(".apk", "-" + defaultConfig.versionName + ".apk"))
    }
}