Ubuntu21.04にFlutterの開発環境構築

 （１）準備

　Flutter SDKインストール

　$ git clone https://github.com/flutter/flutter

　$ sudo mv flutter /usr/local/

　$ export PATH=$PATH:/usr/local/flutter/bin

（２）Android　Stuidoインストール

　https://developer.android.com/studio

　$ wget https://dl.google.com/dl/android/studio/ide-zips/3.5.3.0/android-studio-ide-191.6010548-linux.tar.gz

　$ sudo tar -xzvf android-studio-ide-191.6010548-linux.tar.gz -C /usr/local/

　$ /usr/local/android-studio/bin/studio.sh でAndroid Studioをセットアップ

（３）ビルドで必要になるパッケージのインストール

　$ sudo apt install clang curl pkg-config ninja-build cmake libgtk-3-dev libblkid-dev liblzma-dev unzip

（４）Flutterのセットアップ

　$ flutter config --enable-linux-desktop

（５）確認

$ flutter doctor

Doctor summary (to see all details, run flutter doctor -v):

[?] Flutter (Channel master, v1.12.3-pre.49, on Linux, locale en_US.UTF-8)

[?] Android toolchain - develop for Android devices (Android SDK version 29.0.2)

[?] Linux toolchain - develop for Linux desktop

[!] Android Studio (version 3.5)

    ? Flutter plugin not installed; this adds Flutter specific functionality.

    ? Dart plugin not installed; this adds Dart specific functionality.

[!] VS Code (version 1.40.1)

    ? Flutter extension not installed; install from

      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[!] Proxy Configuration

    ! NO_PROXY does not contain 127.0.0.1

[?] Connected device (1 available)

! Doctor found issues in 3 categories.

ーーーーーーーーーーーーーーーーーーーーーーーーーーー

サンプルの実行

（１）サンプルプロジェクトの作成

$ mkdir sample

$ cd sample

$ flutter create .

（２）実行

$ flutter run -d linux

もしくは

$ flutter build linux

$ build/linux/debug/bundle/sample

ーーーーーーーーーーーーーーーーーーーーーーーーーーー

デスクトップ向けプラグインの動作確認

（１）flutter-desktopーembedding取得

$ git clone https://github.com/google/flutter-desktop-embedding.git

（２）実行

$ cd flutter-desktop-embedding/testbed

$ flutter run -d linux