Flutter1.22.x似乎对Android Studio 4.1支持不太友好，无论怎么尝试总是提示Flutter plugin not installed，将as降级到4.0.x版本即可。
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 1.22.3, on Mac OS X 10.15.7 19H2, locale zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 11.7)
[!] Android Studio (version 4.1)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Community Edition (version 2020.1.2)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.50.1)
[✓] Connected device (1 available)
