The expected argument types are (java.util.Map) but the supplied types were(java.lang.String) and converted to (null).

Flex异常：The expected argument types are (java.util.Map) but the supplied types  were(java.lang.String) and converted to (null)

 

解决方法：

breedPlanDemandBO.query(ResultEvent.RESULT,queryResultHandler);//没有加addEventListener

breedPlanDemandBO.query(obj);

 

private function queryResultHandler(event:ResultEvent):void{}