I accidentally upgraded dart and flutter to the newest version but my code dont support null safety yet. Now I want to downgrade back to dart 1.x I tried flutter downgrade v1.2.1 but nothing changed. How can I downgrade back to dart 1.x?

CodePudding user response：

You can downgrade flutter version by following below sequence.

1. type 'flutter downgrade 1.22.6'
2. Just type and command. 'flutter verion'

After 1,2 steps, you can see downgrading processing.

CodePudding user response：

there is a tool that helps to manage different versions of flutter FVM or you can use

flutter downgrade <version> (example: flutter downgrade v1.2.1)