"AAPT: error: resource android:attr/dialogCornerRadius not found" when building Android assets

[c0state]

I'm getting the below error with the latest launch darkly react native SDK

To reproduce
From root of react native app, run cd android && ./gradlew assembleRelease

Expected behavior
I expect the android assets to build successfully

Logs

Execution failed for task ':launchdarkly-react-native-client-sdk: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
     /Users/sliu/.gradle/caches/transforms-2/files-2.1/b223af57039658e6101987f96510dfd5/appcompat-1.0.2/res/values-v28/values-v28.xml:5:5-8:13: AAPT: error: resource android:attr/dialogCornerRadius not found.
         
     /Users/sliu/.gradle/caches/transforms-2/files-2.1/b223af57039658e6101987f96510dfd5/appcompat-1.0.2/res/values-v28/values-v28.xml:9:5-12:13: AAPT: error: resource android:attr/dialogCornerRadius not found.
         
     /Users/sliu/.gradle/caches/transforms-2/files-2.1/d67585c7f2ea0d699d201615e94006d0/core-1.0.1/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontVariationSettings not found.
         
     /Users/sliu/.gradle/caches/transforms-2/files-2.1/d67585c7f2ea0d699d201615e94006d0/core-1.0.1/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/ttcIndex not found.

SDK version
"3.1.0"

Language version, developer tools

OS/platform
macOS Catalina 10.15.4

Additional context
Not super familiar with gradle/Android build system but there seems to be an inconsistency in the versions being specified here. Your build.gradle references compile SDK 27 in one place and then 28 in another:

buildscript {
    ext {
        buildToolsVersion = "28.0.2"
        minSdkVersion = 16
        compileSdkVersion = 28 // <---------- different version below
        targetSdkVersion = 27 // <---------- also why is target "27" here, shouldn't it also be 28?
        supportLibVersion = "28.0.0"
    }
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.2'
    }
}

apply plugin: 'com.android.library'

android {
    compileSdkVersion 27 // <---------- different version above

If I change locally all compile and target SDK versions to 28, it fixes the error in my case.

Also, https://stackoverflow.com/a/50496385/522415 seems related...
Also, anecdotally, most react libraries I've inspected reference Android SDK version 28

[gwhelanLD]

Hi @c0state,

Thanks for reporting this issue. I agree that those should be made to consistently reference SDK 28. Would you like to open a PR for that change?

Thanks,
@gwhelanLD

[bwoskow-ld]

This has been fixed in 3.1.1 -- thanks for the contribution!