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.