336x280(권장), 300x250(권장), 250x250, 200x200 크기의 광고 코드만 넣을 수 있습니다.
Failed to resolve: com.google.firebase:firebase-core:9.0.0 error

  • Click Tools > Android > SDK Manager
  • Click into the SDK Tools tab
  • Select and install Google Play Services (rev 30) and Google Repository (rev 26). See the image below.
  • Sync and Build your project.


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