我在运行应用程序时遇到问题。我的颤振详细信息是：
颤振版本：1.12.13+hotfilx.9
Doctor summary (to see all details, run flutter doctor -v):
[?] Flutter (Channel stable, v1.12.13+hotfix.9, on Microsoft Windows [Version 10.0.17763.1098], locale en-IN)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.0-rc2)
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 1.44.2)
[?] Connected device (1 available)
! Doctor found issues in 1 category.
在 Visual …