flutter doctorでAndroid license status unknownになった場合の対処法

flutter doctorした時にこのようなエラーが出るケースがある

❯ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.2, on macOS 11.6 20G165 darwin-arm, locale ja-JP)
[!] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[✓] Android Studio (version 2020.3)
[✓] IntelliJ IDEA Ultimate Edition (version 2021.2.2)
[✓] IntelliJ IDEA Ultimate Edition (version 2021.2.2)
[✓] VS Code (version 1.60.2)
[✓] Connected device (3 available)

! Doctor found issues in 1 category.

flutter doctor --android-licensesを実行してみる

❯ flutter doctor --android-licenses

ERROR: JAVA_HOME is set to an invalid directory: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.

javaを入れてJAVA_HOMEを有効にする

ここで指定するjavaのバージョンは恐らくAndroid SDKのversionと関係しているのかと予想。
/android/app/build.gradleに記載があるので対応するjavaのバージョンが何かを調べてみても良さそうです。

$ brew tap homebrew/cask-versions
$ brew install adoptopenjdk8 --cask
$ echo JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home >> ~/.zshrc