Doctor summary (to see all details, run flutter doctor -v):

[√] Flutter (Channel stable, v1.12.13+hotfix.8, on Microsoft Windows [Version 10.0.18363.720], locale zh-CN)

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)

? ? X Android license status unknown.

? ? ? Try re-installing or updating your Android SDK Manager.

? ? ? See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed

? ? ? instructions.

[√] Android Studio (version 3.6)

[!] VS Code (version 1.43.2)

? ? X Flutter extension not installed; install from

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

[!] Connected device

? ? ! No devices available