• 运行：
  flutter run （默认为debug环境）
  flutter run --release (以release模式运行)
• 帮助：flutter -h 或 flutter --help
• 诊断flutter：flutter doctor
• 查看flutter版本号：flutter --version
• flutter升级：flutter upgrade
• 获取flutter packages包：flutter packages get
• json序列化，自动监听命令（使用json_annotation、build_runner、json_serializable库的执行命令）：
  flutter packages pub run build_runner watch
• 打包apk包：
  64位-release：
  flutter build apk --release --target-platform android-arm64
  32位-release：
  flutter build apk --release --target-platform android-arm
• 查看flutter当前版本：flutter channel
• 切换flutter版本的master：flutter channel master