No valid Android SDK platforms

Question

When I write flutter doctor command in cmd I get this error.

No valid Android SDK platforms found in G:\SdkManager\platforms. Candidates were:
- android-21
- android-27
- android-28
- android-8.0.0

flutter doctor

env

path

flutter sdk

platforms

plugins

Answer 1

It appears as though this message shows up when you don't have any build-tools packages installed. At the time of writing, to install the minimum required versions, you can fix this issue with:

sdkmanager "platform-tools" "platforms;android-30" "build-tools;30.0.3"

Answer 2

I've set up my Android SDK manually on Windows 10 with the command line and I was able to solve this kind of errors while I tried to set up my development environment, if you want to solve it as I did, just follow the next steps that I posted in a GitHub Comment in a related issue:

https://github.com/flutter/flutter/issues/19805#issuecomment-478306166