Android Gradle 3.0.0-alpha2 plugin, Cannot set the value of read-only property 'outputFile'

Question

i was using this code

applicationVariants.all { variant -> 
    variant.outputs.each { output ->
        def SEP = "_"
        def flavor = variant.productFlavors[0].name
        def buildType = 
        variant.variantData.variantConfiguration.buildType.name
        def version = variant.versionName
        def date = new Date()
        def formattedDate = date.format('ddMMyy_HHmm')
        def newApkName = PROJECT_NAME + SEP + flavor + SEP + buildType + SEP + version + SEP + formattedDate + ".apk"
        def file = new File(newApkName)
        output.outputFile = file
    }
}

to change the name of apk file when i build new apk, but since i use the Android Studio 3.0 Canary 2 this error appear:
Cannot set the value of read-only property 'outputFile'....

heres the Bad news explained, https://developer.android.com/studio/preview/features/new-android-plugin-migration.html#variant_api, apparently a new api is planned to resolve this. Scroll to the bottom of that links page. — Hector, May 30 '17 at 07:50

Paweł Nadolski · Accepted Answer · 2017-07-10T09:17:25.767

207

As Android plugin 3.0 migration guide suggests:

Use all() instead of each()
Use outputFileName instead of output.outputFile if you change only file name (that is your case)

Example from the guide:

// If you use each() to iterate through the variant objects,
// you need to start using all(). That's because each() iterates
// through only the objects that already exist during configuration time—
// but those object don't exist at configuration time with the new model.
// However, all() adapts to the new model by picking up object as they are
// added during execution.
android.applicationVariants.all { variant ->
    variant.outputs.all {
        outputFileName = "${variant.name}-${variant.versionName}.apk"
    }
}

edited Jul 10 '17 at 09:17

answered May 30 '17 at 14:43

Paweł Nadolski

8,296
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I need to change the output file path, not just name. – Amrut Bidri Dec 22 '17 at 05:54
@AmrutBidri, I think it would be best to ask a new question (if it is not already answered somewhere on SO). This question was only for changing file name. – Paweł Nadolski Dec 22 '17 at 15:19
Yes it works, my bad, it was issue with my own plugin which checks gradle version. – sandrstar Mar 28 '18 at 06:40

score 7 · Answer 2 · answered Aug 15 '17 at 09:14

7

See below:

applicationVariants.all { variant ->
    variant.outputs.all { output ->
        def newApkName = applicationId + "-" + variant.versionName + "(" + variant.versionCode + ")" + ".apk";
        outputFileName = new File("${project.projectDir}/../outputs/apks/" + variant.name, newApkName);
    }
}

answered Aug 15 '17 at 09:14

Golan Shay

1,250
18
15

1

this works, but you can't change the output directory – just_user Sep 13 '17 at 07:05
I need to change the output file path, not just name. – Amrut Bidri Dec 22 '17 at 05:54
getting error : Absolute path are not supported when setting an output file name – ozmank Jun 14 '18 at 07:29

score 4 · Answer 3 · answered Jun 16 '17 at 09:10

4

Below code is working for me on android studio canary 3.0.0-alpha3

android.applicationVariants.all {
    variant.outputs.all {
        def newApkName
        newApkName = "APPLICATION_NAME-" + defaultConfig.versionName + "-" + defaultConfig.versionCode".apk"
        outputFileName = newApkName;
    }
}

This change the apk file name

answered Jun 16 '17 at 09:10

Manmeet Singh Batra

467
2
5

Could not get unknown property 'variant' for object of type com.android.build.gradle.internal.api.ApplicationVariantImpl. – ozmank Jun 14 '18 at 07:28

score 2 · Answer 4 · answered Jan 18 '18 at 16:59

This is the complete example of this question.

Only you have to paste in your gradle 3.0+ after productFlavours

    android.applicationVariants.all { variant ->
    variant.outputs.all {

        def SEP = "_"
        def flavor = variant.productFlavors[0].name
        def buildType = variant.variantData.variantConfiguration.buildType.name
        def version = variant.versionName
        def versionCode = variant.versionCode
        def date = new Date();
        def formattedDate = date.format('ddMMyy_HHmm')

        outputFileName = "${flavor}${SEP}${buildType}${SEP}${version}${SEP}${versionCode}${SEP}${formattedDate}.apk"
    }
    }

have you paste it in your gradle 3.0+ and after productFlavours?? you can put the especific error? — Pabel, May 30 '18 at 12:56

Better · Answer 5 · 2017-12-22T08:39:28.937

0

I founded gradle 3.0 is no longer work. source link

However, more complicated tasks that involve accessing outputFile objects no longer work. That's because variant-specific tasks are no longer created during the configuration stage. This results in the plugin not knowing all of its outputs up front, but it also means faster configuration times.

then I used command gradlew to compile project.and cpthe output apk to my specified path

In Execute shell, i putted below command.

./gradlew clean assembleDebug
cp $WORKSPACE/app/build/outputs/apk/debug/*.apk $WORKSPACE/JenkinsApk

edited Dec 22 '17 at 08:39

answered Oct 31 '17 at 07:48

Better

165
1
13

can u share the example how you did it? – Amrut Bidri Dec 22 '17 at 05:53

score 0 · Answer 6 · answered Jun 19 '18 at 14:31

I had the same problem. Error "Cannot set the value of read-only property 'outputFile'....""

So what I did is changing the version of the Android Plugin Repository to 2.3.3 in the Project Structure window. It works now and the error desappearded.

Project Structure

Later, do Clean and Rebuild for the project and that's it

Hope this would be helpful for you.

score 0 · Answer 7 · answered Dec 13 '18 at 00:37

This is a year and half since the question was asked but maybe this will help someone (like me) who discovers this post first. I believe the answer to change the file name and directory was answered here.

applicationVariants.all { variant ->
        variant.outputs.all { output ->
            def relativeRootDir = output.packageApplication.outputDirectory.toPath()
                     .relativize(rootDir.toPath()).toFile()
            output.outputFileName = new File( "$relativeRootDir/release", newOutputName)
        }
    }

score -1 · Answer 8 · answered Oct 31 '17 at 11:04

-1

After update to Android Studio 3.0.0 and use the new gradle, now, the output of apks will be distributed in directories by flavors name and build types.

answered Oct 31 '17 at 11:04

Mohamd Ali

2,146
4
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Android Gradle 3.0.0-alpha2 plugin, Cannot set the value of read-only property 'outputFile'

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