Reputation: 12242

How to downgrade Flutter SDK (Dart 1.x)

I upgraded my Flutter SDK and now my project is broken. I need to basically revert back to a Flutter SDK which uses Dart 1.x.

I tried the following in the pubspec.yaml,

environment:
  sdk: ">=1.19.0 <2.0.0"
  flutter: "^0.1.2"

dependencies:
  flutter:
    sdk: flutter

but now the project just simply doesn't build.

Running "flutter packages get" in binformed...
Package binformed requires Flutter SDK version ^0.1.2 but the current SDK is 0.2.5-pre.38.
pub get failed (1)

Do i need to uninstall the SDK and reinstall it?

Upvotes: 238

Answers (30)

Achintha Isuru

Reputation: 3347

The simple thing you can do is, go to your folder where you have the Flutter SDK, and enter the following command in the terminal.

git checkout <flutter-version>

Upvotes: 0

Trịnh Đức Duy

Reputation: 263

It work for me. Follow these steps:

Navigate to your Flutter SDK directory:

cd /Library/development/flutter

Fetch all tags from the Flutter repository:

git fetch --all --tags

Checkout the specific version tag:
for example:

git checkout tags/3.19.0

Finally, run flutter doctor to ensure everything is set up correctly

Upvotes: 1

Mathav Krishnan

Reputation: 1

Check your flutter version [whether it's main/stable/beta/master] {flutter --version}
https://docs.flutter.dev/release/archive?tab=linux look here for stable versions
use {flutter channel stable} which will revert back to latest stable flutter version.

Upvotes: 0

Eslam Sameh Ahmed

Reputation: 4032

cd to flutter directory, e.g. /home/elia/snap/flutter/common/flutter or c:\users\user\flutter

then do:

git checkout 3.13.9 , use desired version i.e old version

then

flutter downgrade

Upvotes: 3

ADIL BASHA

Reputation: 61

Navigate to your flutter location
git checkout <version number>
flutter doctor -v

Once the flutter doctor command is successful you can go ahead and enjoy the version you wish

to revert back to latest version

flutter channel stable
flutter upgrade

Upvotes: 6

coder

Reputation: 940

The only thing that worked for me was manually select the tag using git

List of available versions and their release dates can be found here

To find where flutter is stored in your computer run

flutter sdk-path

Inside the folder checkout a tag with your version number, for example if you want to switch to version 3.0.0

git tag -l "*3.0.0*"

Find the correct name in the output (will probably by the same or with v in the start)

git checkout <tag_name>

Run flutter --version to make sure the version changed and flutter doctor to check the flutter is installed correctly

Upvotes: 2

Jason chen

Reputation: 39

1.flutter channel <branch> (example: flutter channel stable)；

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

3.git checkout <version> (example: git checkout 1.2.1).

Upvotes: 3

riswan

Reputation: 91

Steps to change the Flutter version is as simple as changing the git branch.

flutter channel <branch> (example: flutter channel stable)

This command is used to change between branches – usually stable/dev/beta/master. We can also put a specific commit id from git.

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

This command will use a specific version number. You can have the list of the available version numbers using flutter downgrade

After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.

Upvotes: -1

giftmarimo

Reputation: 185

The easiest way is to go to your flutter sdk, if you're on Linux open terminal and run flutter sdk-path then cd to the sdk path. run git checkout <ref_of_sdk_you_want>. access the sdk versions here. after the switch, run flutter doctor and restart your IDE, that's it.

You can switch between versions using this way.

Upvotes: 1

Yousuf Ali

Reputation: 408

These are the flowing step to downgrade any flutter version:

Step 1: cd [your flutter sdk path]

Step 2: git checkout [ enter your version ref ]

To get ref goto the url and copy your desired version ref. https://docs.flutter.dev/development/tools/sdk/releases

Suppose I downgrade version 3.3.2

Step 3: flutter doctor or flutter --version

Upvotes: 9

ᴅ ᴇ ʙ ᴊ ᴇᴇ ᴛ

Reputation: 519

All the answers are outdated and not working after the release of flutter 3.0. My solution is somewhat complicated but will still work in May 2022 and after.

I will show you how to downgrade from flutter 3 to Flutter 1.22.6.

the first step is to locate where you have to install flutter files when you have installed them for the 1st time. Like mine is located in c:\src\flutter.
Cut the flutter folder and paste it somewhere. (note:- you have shutdown your android studio/vs code if running)
go to Flutter SDK releases and download the desired flutter version you want. I choose flutter 1.22.6 for windows.
now extract the downloaded flutter zip and paste in c:\src\flutter (or wherever your flutter was installed previously). (don't worry if you're thinking that your Environment Variables path will change, so that is not true, it will still work. you don't have to change anything in Environment variables)
After pasting the flutter extracted folder open android studio and go to File/Setting/language and framework/flutter and correct the Flutter SDK path to C:\src\flutter.(as shown in the image).

6. Now press apply and run flutter --version

Upvotes: 3

Luciano Ribas

Reputation: 389

Downgrade to a specific version on stable channel

Locate flutter path:

whereis flutter

On flutter folder execute

# clean the repo
git clean -fdx
git reset --hard
git fetch --all --prune

# list available tags starting with 2.10
git tag  | grep 2.10

# checkout to stable on tag
git checkout stable
git reset --hard 2.10.5

Finally download the flutter tools

flutter doctor

Upvotes: 2

Akshay Chopra

Reputation: 1253

I found 2-steps easy solution to migrate to any specific version of Flutter.

Navigate to Flutter repo path (Yes, the one we download from official website and unzipped it) in a terminal
Run the following command : git checkout 2.10.5 && flutter precache

Note: Verify & change the Flutter version from here

Open Terminal and Navigate to Flutter folder

Run the following command with the Flutter version you want to switch to:

git checkout 2.10.5 && flutter precache

Reference: https://github.com/flutter/flutter/issues/64238#issuecomment-678605514

Upvotes: 2

Vishal_VE

Reputation: 2137

Just use flutter downgrade v2.8.0 then flutter ask for confirmation

Downgrade flutter to version 1.22.5
? [y|n]:

Type y for Yes to confirm changes

Upvotes: 8

Mostafa Wael

Reputation: 3846

The simplest way to change your flutter version is to:

Navigate to this link and download the flutter version you want.
Extract the files and replace your older flutter directory with them.
If you were using flutter already then no need to redefine the PATH, else, make sure that environment variables are still tied to this folder/path.
Run flutter --version or flutter doctor to check that everything went ok.

Upvotes: 2

Mostafa Wael

Reputation: 3846

To downgrade your flutter version:

Run flutter downgrade v2.5.3 or whatever flutter version you want from here.

If it resulted in any error like

There is no previously recorded version for channel "stable".

or that there is no previous version,

then, make sure to switch to the correct branch {stable, master, dev, beta} using the following command:

flutter channel master

Finally, Run flutter doctor to check that everthing went well.

Upvotes: 2

Rohan Taneja

Reputation: 10727

I find it a little tough to switch (upgrade/downgrade) to a specific Flutter version from the command line. Some of the answers here are outdated.

I prefer to download the SDKs for different versions from here manually.

Let's say I download 2.0.1, 2.0.5 and 2.0.6.
2.0.1 is the current Flutter SDK version for me.

To switch to 2.0.5, delete the current Flutter SDK (the one with the blue icon) and unzip flutter_macos_2.0.5-stable.zip. Then run flutter clean followed by flutter doctor to confirm that everything worked correctly.

This has the benefit of not having to change any paths or having to re-download the entire SDK every time you want to switch.

On macOS, if you get system warnings for not being able to run dart or gentool, then press Allow anyway under System Preferences > Security & Privacy

Upvotes: 2

Laraib. Sheikh

Reputation: 119

This solutions works in 2021

Go to your flutter SDK folder, which is your folder named "flutter" and inside it open a new terminal. Then type:

git checkout (your flutter version) then, run flutter doctor After this check your version.

Upvotes: 1

Hussein AbdElaziz

Reputation: 500

if you are using brew (macos)

you can create rb file and use brew to install or downgrade flutter

create file with name flutter.rb

cask "flutter" do
  version "2.2.0"

  url "https://storage.googleapis.com/flutter_infra_release/releases/stable/macos/flutter_macos_#{version}-st$
      verified: "storage.googleapis.com/flutter_infra_release/"
  name "Flutter SDK"
  desc "UI toolkit for building applications for mobile, web and desktop"
  homepage "https://flutter.dev/"

  livecheck do
    url "https://storage.googleapis.com/flutter_infra_release/releases/releases_macos.json"
    regex(%r{/flutter[._-]macos[._-]v?(\d+(?:\.\d+)+)[._-]stable\.zip}i)
  end

  auto_updates true

  binary "flutter/bin/dart"
  binary "flutter/bin/flutter"
end

then use brew install ./flutter.rb to install flutter or downgrade flutter version

Upvotes: 1

CopsOnRoad

Reputation: 268414

Don't use `flutter version vX.X.X`, use `flutter downgrade` instead.

Warning: "flutter version" will leave the SDK in a detached HEAD state. If you are using the command to return to a previously installed SDK version consider using the "flutter downgrade" command instead.

So, you should use

flutter downgrade

Edit:

If there had been no previous versions installed, the above command would fail. So, if you have a specific version of Flutter that you’d like to switch to, you can use the flutter version command:

flutter downgrade v1.17.0

You can find list of versions here

Upvotes: 79

mskolnick

Reputation: 1182

At the moment, the easiest way to manage flutter versions is through fvm.

Install fvm

brew tap leoafarias/fvm
brew install fvm

Install your version

fvm install x.x.x

Install your version globally (if desired)

fvm global x.x.x

Here's a link to the app guide

https://fvm.app/docs/getting_started/installation

Upvotes: 12

Ivan Yoed

Reputation: 4415

To downgrade there are many deprecated commands.

The two that actually work, and I've tested them, are:

flutter downgrade v[flutter build version]

For instance:

flutter downgrade v1.22.6

And the other one: go to your flutter sdk folder, that is your folder named "flutter" and inside it open a new terminal. Then type:

git checkout [flutter build version]

For instance:

git checkout 1.22.3

Then do flutter doctor and you'll confirm you switched correctly.

You can check the versions on: https://flutter.dev/docs/development/tools/sdk/releases?tab=macos

And for details at: https://flutter.dev/docs/release/breaking-changes

If you happen to want to switch channel, just do:

flutter channel [channel]

For instance (choose one of master, stable, dev, beta):

flutter channel stable

And if you want to upgrade again:

flutter upgrade

Upvotes: 50

Craftspot Designs

Reputation: 209

Inorder for a proper downgrade to any version.

Change to Dev mode

flutter channel dev
flutter downgrade v(type your version number) eg below.

flutter downgrade v2.0.6

This worked for me !

Upvotes: 20

Adelina

Reputation: 11941

To solve these errors:

$ flutter version
Could not find a command named "version".

$ flutter downgrade v1.22.6
There is no previously recorded version for channel "stable".

Delete old flutter folder

Download the archive and unzip instead of deleted flutter folder

cd "$(dirname $(which flutter))" then

git checkout . (optional)

git pull origin (optional)

git checkout v1.22.6

flutter doctor

p.s. Don't forget to restart your android studio

Upvotes: 12

Sumedh

Reputation: 144

Just flutter downgrade is enough, it will downgrade to previous stable version.

Upvotes: 2

Rémi Rousselet

Reputation: 277667

Flutter is versioned using git. Changing the Flutter version is as simple as changing git branch.

There are 2 different ways:

flutter channel <branch> (example: flutter channel stable)

This command is used to change between branches – usually stable/dev/beta/master. We can also put a specific commit id from git.

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

This command will use a specific version number. You can have the list of the available version numbers using flutter downgrade or here

After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.

Upvotes: 329

Maruf Hassan

Reputation: 1248

Go to the terminal and type the specific version number, for eg -

flutter downgrade v1.22.3

Then just press enter. After fetching the files from the internet, it will ask,

Downgrade flutter to version 1.22.5
? [y|n]:

Type y and it will downgrade to the specific version.

Restart the IDE for the settings to take place.

Upvotes: 12

Clarissa

Reputation: 21

Download Flutter SDK release: flutter_windows_1.17.0-stable: https://flutter.dev/docs/development/tools/sdk/releases
Replace the existing Flutter folder to this version
Make sure that environment variables and Flutter + Dart Settings on your IDE are still tied to this folder/path

Upvotes: 2