Failed building release version: not AndroidX compatible

[Ahmadre]

I recognized, that I can't build my app with image_gallery for release version in android.

That was because compileSDKVersion 27 is no longer compatible.

here's my solution:

group 'adhoc.successive.com.fluttergallaryplugin'
version '1.0-SNAPSHOT'

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0'
    }
}

rootProject.allprojects {
    repositories {
        google()
        jcenter()
    }
}

apply plugin: 'com.android.library'

android {
    compileSdkVersion 28

    defaultConfig {
        minSdkVersion 21
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    lintOptions {
        disable 'InvalidPackage'
    }
}
dependencies {
    implementation 'androidx.appcompat:appcompat:1.1.0-rc01'
    implementation 'com.karumi:dexter:5.0.0'
    implementation 'androidx.annotation:annotation:1.1.0'

}

[msndvlpr]

I have the same issue and above solution didn't work form me, when I run gradlew clean build command in terminal following error is shown:

• What went wrong:
  Execution failed for task ':image_gallery:verifyReleaseResources'.

A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
1 exception was raised by workers:
com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
C:\Users\user.gradle\caches\transforms-2\files-2.1\fc2452449aadc16e6abc0a2f67f6a505\appcompat-1.0.0\res\values-v28\values-v28.xml:5:5-8:13: AAPT: error: resource android:att
r/dialogCornerRadius not found.

 C:\Users\user\.gradle\caches\transforms-2\files-2.1\fc2452449aadc16e6abc0a2f67f6a505\appcompat-1.0.0\res\values-v28\values-v28.xml:9:5-12:13: AAPT: error: resource android:at

tr/dialogCornerRadius not found.

 C:\Users\user\.gradle\caches\transforms-2\files-2.1\99c750684a6dd408a1ed0af3e9116cef\core-1.1.0\res\values\values.xml:142:5-173:25: AAPT: error: resource android:attr/fontVar

iationSettings not found.

 C:\Users\user\.gradle\caches\transforms-2\files-2.1\99c750684a6dd408a1ed0af3e9116cef\core-1.1.0\res\values\values.xml:142:5-173:25: AAPT: error: resource android:attr/ttcInde

x not found.