[Unity] 빌드에러 해결) java.io.IOException: Can't read (생략) (Can't process class [android/car/Car$CarServiceLifecycleListener.class] (Unsupported version number [55.0] (maximum 54.0, Java 10)))

에러사유 : 구글 애드몹 관련

 

해결방법

1.빌드 옵션에서 Custom Base Gradle Template를 활성화 한다

2. 해당 경로로 들어가 baseProjectTemplate.gradle를 실행시킨다.

 

3. 아래를 참고하여 빠진 부분을 추가한다. (절대 전체 복붙 금지!  개발환경에 따라 버전이 다를 수 있음)
의존성 부분에 'com.guardsquare:proguard-gradle:7.1.0' <- 이부분이 아마 없을것이다.

allprojects {
    buildscript {
        repositories {**ARTIFACTORYREPOSITORY**
            google()
            jcenter()
        }

        dependencies {
            // If you are changing the Android Gradle Plugin version, make sure it is compatible with the Gradle version preinstalled with Unity
            // See which Gradle version is preinstalled with Unity here https://docs.unity3d.com/Manual/android-gradle-overview.html
            // See official Gradle and Android Gradle Plugin compatibility table here https://developer.android.com/studio/releases/gradle-plugin#updating-gradle
            // To specify a custom Gradle version in Unity, go do "Preferences > External Tools", uncheck "Gradle Installed with Unity (recommended)" and specify a path to a custom Gradle version
            classpath 'com.android.tools.build:gradle:4.0.1'
            classpath 'com.guardsquare:proguard-gradle:7.1.0'
            **BUILD_SCRIPT_DEPS**
        }
    }

    repositories {**ARTIFACTORYREPOSITORY**
        google()
        jcenter()
        flatDir {
            dirs "${project(':unityLibrary').projectDir}/libs"
        }
        maven { url "https://maven.google.com/"}
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

4. 수정후 다시 빌드