在使用getHeader和getParams时，Volley Post JsonObjectRequest忽略参数。

I am trying to connect API url="api adress" which accepts two header types application/json to reponce in json and application/xml to reponce in xml. I need to hit JSON with json parameters and responce will be in json format too. Using android volley Post request with JsonObjectRequest setting headers using getHeaders it connects to server but getParams to set parameters does not work.I am trying to connect API url="api adress" whi