Как установить Flutter на ubuntu 20.04?

На самом деле я почти закончил установку. Единственная проблема - когда я запускаю flutter doctor , я получаю этот отчет об ошибке:

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.17.5, on Linux, locale en_US.UTF-8)
[!] Android toolchain - develop for Android devices (Android SDK version 27.0.1)
    ✗ Flutter requires Android SDK 28 and the Android BuildTools 28.0.3
      To update using sdkmanager, run:
        "/usr/lib/android-sdk/tools/bin/sdkmanager" "platforms;android-28"
        "build-tools;28.0.3"
      or visit https://flutter.dev/docs/get-started/install/linux#android-setup
      for detailed instructions.
    ✗ Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit visit
      https://flutter.dev/docs/get-started/install/linux#android-setup for
      detailed instructions.
[✓] Android Studio (version 4.0)
[!] Connected device
    ! No devices available

! Doctor found issues in 2 categories.

Как я уже сказал, я при работе на Ubuntu 20.04 установлена ​​студия Andrroid: Настройки SDK