리액트 네이티브 앱을 만들려고 안드로이드 스튜디오까지 설치하고 자바 설치하고 npm run android 또는 ./gradlew clean 를 동작시킬 때 아래와 같은 오류가 발생했었다.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'naminsik'.
> Could not determine the dependencies of null.
   > Could not resolve all task dependencies for configuration ':classpath'.
      > Could not find com.android.tools.build:gradle:.
        Required by:
            project :
      > Could not resolve com.facebook.react:react-native-gradle-plugin.
        Required by:
            project :
         > No matching variant of project :gradle-plugin was found. The consumer was configured to find a library for use during runtime, compatible with Java 8, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '8.0.1' but:
             - Variant 'apiElements' capability com.facebook.react:react-native-gradle-plugin:unspecified declares a library, packaged as a jar, and its dependencies declared externally:
                 - Incompatible because this component declares a component for use during compile-time, compatible with Java 11 and the consumer needed a component for use during runtime, compatible with Java 8
                 - Other compatible attribute:
                     - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')
             - Variant 'mainSourceElements' capability com.facebook.react:react-native-gradle-plugin:unspecified declares a component, and its dependencies declared externally:
                 - Incompatible because this component declares a component of category 'verification' and the consumer needed a library
                 - Other compatible attributes:
                     - Doesn't say anything about its target Java version (required compatibility with Java 8)
                     - Doesn't say anything about its elements (required them packaged as a jar)
                     - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')
                     - Doesn't say anything about its usage (required runtime)
             - Variant 'runtimeElements' capability com.facebook.react:react-native-gradle-plugin:unspecified declares a library for use during runtime, packaged as a jar, and its dependencies declared externally:
                 - Incompatible because this component declares a component, compatible with Java 11 and the consumer needed a component, compatible with Java 8
                 - Other compatible attribute:
                     - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')
             - Variant 'testResultsElementsForTest' capability com.facebook.react:react-native-gradle-plugin:unspecified:
                 - Incompatible because this component declares a component of category 'verification' and the consumer needed a library
                 - Other compatible attributes:
                     - Doesn't say anything about how its dependencies are found (required its dependencies declared externally)
                     - Doesn't say anything about its target Java version (required compatibility with Java 8)
                     - Doesn't say anything about its elements (required them packaged as a jar)
                     - Doesn't say anything about org.gradle.plugin.api-version (required '8.0.1')
                     - Doesn't say anything about its usage (required runtime)

* Try:
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BUILD FAILED in 2s

위 내용 중에 중요한 내용은 바로 이 부분이다.

Incompatible because this component declares a component for use during compile-time, compatible with Java 11 and the consumer needed a component for use during runtime, compatible with Java 8

이건 설치된 JAVA 버전은 8이고 필요한 JAVA 버전은 11이란 것이다.

초반에 설치할 때 brew install --cask adoptopenjdk8 를 통해 설치해서 java 8이 설치되었다.

해결 방법

JAVA 버전을 11 버전으로 설치한다.

brew install --cask adoptopenjdk/openjdk/adoptopenjdk11