flutter - 如何在颤振上使用 Traccar api？

Question

我正在尝试在我的颤振项目中使用 Traccar API，但它没有给我一个错误。我已经在邮递员上尝试过 API，它工作得很好。我试过HTTP包和Dio包仍然有同样的错误。我也尝试过 相同的问题，但仍然没有区别。有什么办法可以解决这个问题吗？

E/flutter (31398): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: DioError [DioErrorType.other]: HttpException: , uri = 
E/flutter (31398): #0      DioMixin.assureDioError
package:dio/src/dio_mixin.dart:819
E/flutter (31398): #1      DioMixin._dispatchRequest
package:dio/src/dio_mixin.dart:678
E/flutter (31398): <asynchronous suspension>
E/flutter (31398): #2      DioMixin.fetch.<anonymous closure>.<anonymous closure> (package:dio/src/dio_mixin.dart)
package:dio/src/dio_mixin.dart:1
E/flutter (31398): <asynchronous suspension>
E/flutter (31398):
E/flutter (31398): #0      DioMixin.fetch.<anonymous closure>
package:dio/src/dio_mixin.dart:618
E/flutter (31398): #1      _rootRunBinary (dart:async/zone.dart:1378:47)
E/flutter (31398): #2      _CustomZone.runBinary (dart:async/zone.dart:1272:19)