因为引用了获取设备信息的依赖，在vscode中运行flutter时报

Cannot run with sound null safety, because the following dependencies
don't support null safety:

使用快捷键 shift+cmd+p

然后输入"settings"

然后打开“preferences: open settings(JSON）”

再在settings.json文件里面加入

  "dart.flutterTestAdditionalArgs": ["--no-sound-null-safety"],
    "dart.flutterAdditionalArgs": ["--no-sound-null-safety"],
    "dart.vmAdditionalArgs": ["--no-sound-null-safety"]