Cannot set the value of read-only property 'outputFile' for ApkVariantOutputImpl_Decorated

Question

I was using the following code in my gradle script to rename the apks generated with AndroidStudio:

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

So it was generating apks with names like: 345-app-release.apk, where 345 is the versionCode.

But after updating to AndroidStudio 3.0 it returns the following error:

Cannot set the value of read-only property 'outputFile' for ApkVariantOutputImpl_Decorated{apkData=Main{type=MAIN, fullName=debug, filters=[]}} of type com.android.build.gradle.internal.api.ApkVariantOutputImpl.

How can I achieve a similar renaming with the new build tools.

score 120 · Accepted Answer · answered Oct 26 '17 at 13:35

120

Use output.outputFileName instead of output.outputFile

answered Oct 26 '17 at 13:35

AndrzejSc

1,316
1
8
4

2

It was created error afterwards, I needed to solve it like here: https://stackoverflow.com/a/46959050/2061089 – oli Nov 30 '17 at 13:10
try this https://stackoverflow.com/questions/46949311/cannot-set-the-value-of-read-only-property-outputfile-for-apkvariantoutputimpl/50464200#50464200 – GS Nayma May 22 '18 at 09:30
1

This causes an error: **ERROR: No such property: parent for class: java.lang.String** – IgorGanapolsky Aug 09 '19 at 12:58

Zumry Mohamed · Answer 2 · 2019-10-18T09:37:00.977

31

2019 - Simple Solution for Gradle 3.0+** and 3.1.0

To change the name of the APK in Android

 android { //add inside the android {}
   ......
   applicationVariants.all { variant ->
       variant.outputs.all {
           def flavor = variant.name
           def versionName = variant.versionName
           outputFileName = "prefix_${flavor}_${versionName}.apk"
       }
   }
}

prefix_release_1.0.1.apk

edited Oct 18 '19 at 09:37

answered Nov 28 '17 at 04:05

Zumry Mohamed

9,318
5
46
51

17

Absolute path are not supported when setting an output file name getting this error – Napolean Apr 06 '18 at 12:08
@Keselme I lower down the gradle tools version in top level build.gradle file. – Napolean Apr 16 '18 at 08:22
this answer might help you https://stackoverflow.com/questions/46949311/cannot-set-the-value-of-read-only-property-outputfile-for-apkvariantoutputimpl/50464200#50464200 – GS Nayma May 22 '18 at 09:29
Could not get unknown property 'applicationVariants' for object of type com.android.build.gradle.LibraryExtension. – MeLean Aug 15 '18 at 10:04
@MeLine try now. – Zumry Mohamed Oct 18 '19 at 09:37
This is the only thing that worked! Upvoted – Jones G Feb 15 '21 at 09:46

score 17 · Answer 3 · answered Jun 27 '18 at 11:32

Try this code :

buildTypes {

       applicationVariants.all { variant ->
            variant.outputs.each { output ->
                def name = "myapp_v${variant.versionName}(${variant.versionCode}).apk"
                output.outputFileName = name
            }
        }

    }

score 9 · Answer 4 · answered May 22 '18 at 09:27

9

In or After gradle 3.1.0

try below code

    applicationVariants.all { variant ->
        variant.outputs.all { output ->
            outputFileName = new File(
                    "release_build", // here you can change the name
                    output.outputFile.name)
        }
}

answered May 22 '18 at 09:27

GS Nayma

1,745
19
24

I got this error Could not set unknown property 'outputFileName' for object of type com.android.build.gradle.internal.api.ApplicationVariantImpl. – Yogesh Rathi Nov 19 '18 at 11:55

score 1 · Answer 5 · answered May 28 '18 at 05:45

1

In my case I resolved it by just refusing to update to Gradle 4.4 (in my case).So when Studio asks (when you open your project for the first time) you to update Gradle to support instant run,etc just simply refuse and you should be fine.

answered May 28 '18 at 05:45

Surbhit Rao

625
6
14

score 1 · Answer 6 · answered Oct 15 '18 at 17:52

What worked for me was to 1. change each to "all" 2. change output.outputFile to "outputFileName" 3. Run $./gradlew clean build in terminal

For example, if your artifacts.gradle settings were this:

android.applicationVariants.all { variant ->

variant.outputs.each { output ->
    def finalVersionCode = 10000 + versionCode
    output.versionCodeOverride = finalVersionCode
    output.outputFile = new File(
         output.outputFile.parent,       output.outputFile.name.replace(".apk","-${finalVersion}.apk"))
}

}

Then you would want to change it to this:

android.applicationVariants.all { variant ->

variant.outputs.all { output ->
    def finalVersionCode = 10000 + versionCode
    output.versionCodeOverride = finalVersionCode
    outputFileName = new File(
         output.outputFile.parent,
         outputFileName.replace(".apk", "-${finalVersionCode}.apk"))
}

}

score 0 · Answer 7 · answered May 17 '18 at 18:17

0

change your code into:-

    applicationVariants.all { variant ->
    variant.outputs.each { output ->
        output.outputFile = new File(output.outputFile.parent, "${variant.applicationId}-${variant.versionName}.apk")
    }
}

answered May 17 '18 at 18:17

Chetan

1

Cannot set the value of read-only property 'outputFile' for ApkVariantOutputImpl_Decorated

7 Answers7

2019 - Simple Solution for Gradle 3.0+** and 3.1.0

Linked