Since the

sudo apt install snapd

sudo snap install flutter --classic
flutter sdk-path

Add the $FLUTTERPATH/bin to the $PATH. In my case the path was located at ~/home/user/snap/flutter/common/flutter

vim ~/.config/fish/config.fish
#
# ....
#
set -gx FLUTTERPATH /home/user/snap/flutter/common/flutter
set -gx PATH $PATH $GOPATH/bin $FLUTTERPATH/bin

Run

flutter doctor

shows

[✗] 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/linux#android-setup for detailed instructions).
    If the Android SDK has been installed to a custom location, please use `flutter config --android-sdk` to update to that location.

Installed

After opening Android Studio, I completed the intallation wizard.

Found the

sudo snap install android-studio --classic
flutter config --android-sdk=$HOME/Android/Sdk/
flutter config --android-studio-dir /snap/android-studio/current/android-studio

I had to run android-studio, go through the wizard, and open a new blank project before the tools were downloaded.

Go a missing library error

# Does't work with JDK 11
# sudo apt install default-jre
sudo apt-get install openjdk-8-jdk

Installed chrome using the Elementary OS App Center

• Couldn’t figure out the path to the executable
• flutter doctor couldn’t find it

Went to https://www.google.com/chrome/thank-you.html?installdataindex=defaultbrowser&platform=linux&statcb=0&defaultbrowser=1

Run another command

flutter doctor --android-licenses

More deps

sudo apt-get install clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev

Since some of the installation only worked in Google Chrome, I followed the directions listed in the

config.fish

set -gx GOPATH $HOME/go
set -gx FLUTTERPATH /home/user/snap/flutter/common/flutter
set -gx ANDROID_SDK $HOME/Android/Sdk
set -gx PATH $PATH $GOPATH/bin $FLUTTERPATH/bin $ANDROID_SDK/tools/bin

INSTALL_FAILED_INSUFFICIENT_STORAGE

• Fix- INSTALL_FAILED_INSUFFICIENT_STORAGE on Android emulators
• Increase the internal storage