控制台报错：.

Because every version of flutter_localizations from sdk depends on meta 1.3.0 and json_annotation >=4.1.0 <4.2.0 depends on meta ^1.4.0, flutter_localizations from sdk is incompatible with json_annotation >=4.1.0 <4.2.0.
And because json_serializable ^5.0.0 depends on json_annotation >=4.1.0 <4.2.0, flutter_localizations from sdk is incompatible with json_serializable ^5.0.0.
So, because atui depends on both flutter_localizations any from sdk and json_serializable ^5.0.0, version solving failed.
pub get failed (1; So, because atui depends on both flutter_localizations any from sdk and json_serializable ^5.0.0, version solving failed.dependency_overrides

原因是当前使用的flutter版本中默认的是meta 1.3.0，而json_annotation >=4.1.0 <4.2.0这范围内的版本依赖的是meta 1.4.0导致不兼容，并且由此影响导致 json_serializable ^5.0.0也不兼容。

方法1：
在pubspec.yaml中添加：dependency_overrides: meta: ^1.7.1

方法2：
更换更高版本的flutter sdk，版本在2.5.0以上（我换的2.5.1） 需要注意的是2.5.0以上是引用空安全的.