Flutter 初体验之安装与创建项目

安装

1. git clone -b dev https://github.com/flutter/flutter.git

2. cd flutter

3. ./bin/flutter config --no-analytics 禁用通过 Google Analytics 发送数据（以免国内网络连接失败问题）

4. ./bin/flutter doctor

创建项目

最简单的命令只要 flutter create my_flutter_app 即可。注意 flutter 建议使用使用这样命名方式。

关于 创建项目的更多选项参考: flutter help create

如果出现类似下面的错误，多试几次。

➜ ~flutter create -t app --org=banxi1988.com -i swift -a kotlin try_flutter_app

Downloading package sky_engine...(cached)

...

Downloading android-arm64-release tools...

Oops; flutter has exited unexpectedly.

Sending crash report to Google.

Failed to send crash report due to a network error: SocketException: Connection failed (OS Error: No route to host, errno = 65), address = clients2.google.com, port = 443

Crash report written to /Users/banxi/flutter_01.log;

please let us know at https://github.com/flutter/flutter/issues.

后面可能会遇到：

Running "flutter packages get" in try_flutter_app...

Connection failed (OS Error: No route to host, errno = 65), address = storage.googleapis.com, port = 443

这个时候可以考虑使用国内的镜象。下面是我们的环境变量配置:

export PUB_HOSTED_URL=https://pub.flutter-io.cn

export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

设置好镜象之后可以运行其他命令如 flutter run 或者 flutter packages get

来下载依赖。

下面是一次成功的运行过程输出：

➜ try_flutter_app flutter run -d 68U5T17B28005137

Launching lib/main.dart on RNE AL00 in debug mode...

Initializing gradle...                                1.0s

Resolving dependencies...                            1.0s

Running 'gradlew assembleDebug'...                    1.7s

Built build/app/outputs/apk/debug/app-debug.apk (25.8MB).

I/FlutterActivityDelegate(23577): onResume setting current activity to this

Syncing files to device RNE AL00...

I/FlutterActivityDelegate(23577): onResume setting current activity to this

🔥  To hot reload your app on the fly, press "r". To restart the app entirely, press "R".

An Observatory debugger and profiler on RNE AL00 is available at: http://127.0.0.1:8101/

For a more detailed help message, press "h". To quit, press "q".

I/hwaps  (23577): JNI_OnLoad

Initializing hot reload...

Reloaded 466 of 482 libraries in 4,422ms.