React Native Troubleshooting

npm run android 실행 후 바로 죽을 때

 

watchman watch-del-all && npm cache clean && cd android && ./gradlew clean && cd ..

---

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':tasks'.
> Could not create task ':react-native-shared-group-preferences:compileDebugJavaWithJavac'.
   > In order to compile Java 9+ source, please set compileSdkVersion to 30 or above

 

https://stackoverflow.com/questions/76644279/in-order-to-compile-java-9-source-please-set-compilesdkversion-to-30-or-above

 

subprojects { subproject ->
        afterEvaluate{
            if((subproject.plugins.hasPlugin('android') || subproject.plugins.hasPlugin('android-library'))) {
                android {
                    compileSdkVersion rootProject.ext.compileSdkVersion
                    buildToolsVersion rootProject.ext.buildToolsVersion
                }
            }
        }
    }

 

Uncaught Error : 'app name' has not been registered. This can happen if: ...

위와 같은 에러가 발생한다면 당황하지말고 Metro가 실행되고 있는 터미널을 찾아 종료한 후에 다시 npm run을 해보자