2020-06-30 12:52:54.237973-0700 Runner[580:228465] Metal API Validation Enabled
2020-06-30 12:52:54.382810-0700 Runner[580:228698] flutter: Observatory listening on http://127.0.0.1:50735/u2EjnBszARk=/
2020-06-30 12:52:54.676675-0700 Runner[580:228686] fopen failed for data file: errno = 2 (No such file or directory)
2020-06-30 12:52:54.676742-0700 Runner[580:228686] Errors found! Invalidating cache...
2020-06-30 12:52:54.764319-0700 Runner[580:228686] fopen failed for data file: errno = 2 (No such file or directory)
2020-06-30 12:52:54.764380-0700 Runner[580:228686] Errors found! Invalidating cache...

$ flutter doctor -v
[✓] Flutter (Channel master, 1.20.0-2.0.pre, on macOS 10.16 20A4299v, locale en-US)
    • Flutter version 1.20.0-2.0.pre at /Users/surry/Projects/flutter
    • Framework revision 747fe345f1 (12 days ago), 2020-06-18 08:28:03 -0700
    • Engine revision 965fbbed17
    • Dart version 2.9.0 (build 2.9.0-14.0.dev 2b917f5b6a)

[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, set ANDROID_SDK_ROOT to that location.
      You may also want to add it to your PATH environment variable.


[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode-11.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.3

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).

[✓] Connected device (2 available)
    • iPad  • 00008027-001925360106802E • ios        • iOS 14.0
    • macOS • macOS                     • darwin-x64 • macOS 10.16 20A4299v

! Doctor found issues in 2 categories.