Execution failed for task ':flutter_twitter:verifyReleaseResources'

Question

I'm working on Flutter app. I can run app in the android device successfully but try to make build (.apk) file and got below issues.

FAILURE: Build failed with an exception.                                                                           

* What went wrong:                                                                                                 
Execution failed for task ':flutter_twitter:verifyReleaseResources'.                                               
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade                  
   > Android resource linking failed                                                                               
     /Users/ipatel/.gradle/caches/transforms-2/files-2.1/8f09fa5c6115de167b21b323f769edd9/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontVariationSettings not found.

     /Users/ipatel/.gradle/caches/transforms-2/files-2.1/8f09fa5c6115de167b21b323f769edd9/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/ttcIndex not found.


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BUILD FAILED in 5m 2s                                                                                              
Running Gradle task 'assembleRelease'...                                                                           
Running Gradle task 'assembleRelease'... Done                     303.8s (!)
The built failed likely due to AndroidX incompatibilities in a plugin. The tool is about to try using Jetfier to solve the incompatibility.
Building plugin firebase_messaging...
The plugin firebase_messaging could not be built due to the issue above.

Below are project's stuffs

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.xxxx.eeee"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}

> local.properties

sdk.dir=/Users/ipatel/Library/Android/sdk
flutter.sdk=/Users/ipatel/Documents/Amit/FlutterSetup/flutter
flutter.buildMode=release
flutter.versionName=1.0.0
flutter.ver

My app is compatible with AndroidX and also tried with many solution but can't able to fix my issue.

I checked
- https://github.com/roughike/flutter_twitter_login/issues/29
- A failure occurred while executing com.android.build.gradle.internal.tasks
- flutter Error "Android dependency 'androidx.core:core' has different version" using flutter_local_notifications and location packages

and others.

Flutter Doctor Result:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.12.13+hotfix.6, on Mac OS X 10.14.3 18D109, locale en-IN)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.41.1)
[✓] Connected device (4 available)

build.gradle

android {
    compileSdkVersion 28

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        applicationId "com.xxxx.aaaa"
        minSdkVersion 21
        targetSdkVersion 28
        multiDexEnabled true
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

gradle.properties

org.gradle.jvmargs=-Xmx1536M
android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true

~PS : Let me know if you want more details from my end.

Answer 1

The issue is some library is not compatible or not using androidx while others are. Thanks to google for transferring all support lib to androidx now many libraries having conflicts like this and I mostly go to debug around which lib has an issue like commenting and uncommenting the lib from pubspec.

Assuming the flutter_twitter plugin was the issue.

As we can check that, that twitter plugin not using AndroidX link so we need to change it our self.

(all these changes needs to be changed in twitter plugin, not flutter project)

I think you can change the gradle.properties to use androidx and also compile version to 28 gradle.properties:

android.useAndroidX=true
android.enableJetifier=true

add this two lines, change gradle classpath classpath 'com.android.tools.build:gradle:3.5.3' and compileSdkVersion 28 in flutter_twitter. I am able to generate release build using that plugin.

Ohh yah you can find your cached version of plugin at /Users/parth.dave/.pub-cache/hosted/pub.dartlang.org/flutter_twitter_login-1.1.0/ something like this where you can update it. or either open android folder in androidstudio and studio will show you two projects app and twitter where you can update this things.

also sometimes it's better to open android project in android studio and update all things from which you might get errors before running flutter projects.