flutter doctor -v

1、cmdline-tools component is missing

[✗] Android toolchain - develop for Android devices
    • Android SDK at /Users/huchu/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.

打开Android Studio设置， Appearance &Behavior-》System Settings -〉Android SDK -> SDK Tools下载 Android SDK Command-line Tools(latest)

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2、Android SDK file not found

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/huchu/Library/Android/sdk
    • Platform android-30, build-tools 29.0.3
    • ANDROID_HOME = /Users/huchu/Library/Android/sdk
    ✗ Android SDK file not found: /Users/huchu/Library/Android/sdk/platforms/android-30/android.jar.
    • Try re-installing or updating your Android SDK,
      visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions.

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再次执行flutter doctor没问题了

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