はじめに

Flutter Webも登場してFlutter触ってみたくなった
まずはFlutter WebではなくAndroidでやってみる
ほんとうはAR CoreかAR KitやりたいんだけどFlutterでできるのかは分からない
Nest Hubのアプリ開発もやりたい
取り敢えず公式のインストール手順どおりにやった記録
- https://flutter.dev/docs/get-started/install

環境

Linux(Ubuntuデスクトップ)
Androidターゲット
Flutter、Androidともに未経験のおっさん

Flutterインストール

$ cd
$ curl -O https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_v1.5.4-hotfix.2-stable.tar.xz
$ tar xf flutter_linux_v1.5.4-hotfix.2-stable.tar.xz
$ rm flutter_linux_v1.5.4-hotfix.2-stable.tar.xz

PATH追加

+# Flutter
+export PATH="$HOME/flutter/bin:$PATH"
+

必要な依存関係を解決する

$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[!] Flutter (Channel stable, v1.5.4-hotfix.2, on Linux, locale en_US.UTF-8)
    ✗ Downloaded executables cannot execute on host.
      See https://github.com/flutter/flutter/issues/6207 for more information
      On Debian/Ubuntu/Mint: sudo apt-get install lib32stdc++6
      On Fedora: dnf install libstdc++.i686
      On Arch: pacman -S lib32-gcc-libs

[!] Android toolchain - develop for Android devices (Android SDK version 27.0.3)
    ✗ Flutter requires Android SDK 28 and the Android BuildTools 28.0.3
      To update using sdkmanager, run:
        "/home/hammer/Android/Sdk/tools/bin/sdkmanager" "platforms;android-28" "build-tools;28.0.3"
      or visit https://flutter.dev/setup/#android-setup for detailed instructions.
    ✗ Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[!] Android Studio (version 3.0)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Community Edition (version 2018.1)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.29.1)
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

! Doctor found issues in 6 categories.

対応した作業

# [!] Flutter
$ sudo apt-get install lib32stdc++6
# [!] Android toolchain
$ "/home/hammer/Android/Sdk/tools/bin/sdkmanager" "platforms;android-28" "build-tools;28.0.3"
# [!] Android Studio (version 3.0)
# GUIでAndroid Studioの新しいやつ (version 3.4)をインストール
# GUIでAndroid StudioにFlutterとDartプラグインをインストールしてAndroid Studioを再起動

IDEはAndroid Studioでいいかな？と思ってInntelliJとVS Codeの部分は対応しなかった
deviceは持ってなかったのでPixel 3aを発注した

プロジェクト作成

Android StudioでNew Flutter Project
Flutter applicationを選択してプロジェクト作成

起動確認

Android Studioのツールバーからrunアイコンをクリック
エミュレータでアプリ起動が確認できたらOK