오류가 뜨는데 해결을 못 하겠어요.

[√] Flutter (Channel stable, v1.12.13+hotfix.9, on Microsoft Windows [Version 10.0.17134.1425], locale ko-KR)

[X] Android toolchain - develop for Android devices

    X Unable to locate Android SDK.

      Install Android Studio from: https://developer.android.com/studio/index.html

      On first launch it will assist you in installing the Android SDK components.

      (or visit https://flutter.dev/setup/#android-setup for detailed instructions).

      If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.

      You may also want to add it to your PATH environment variable.

[√] Android Studio (version 3.6)

[!] VS Code (version 1.44.2)

    X Flutter extension not installed; install from

      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[!] Connected device

    ! No devices available