How to send request Header is “Content-Type”:“application/json” when GET on Volley

Question

I try to use GET on Volley , but i need send request to application/json .

I take a look for some answers , i try to use jsonBody , but it

Answer 1

I try to use GET on Volley

The docs for the method you are calling says this

Constructor which defaults to GET if jsonRequest is null, POST otherwise

You can't GET with an HTTP JSON body. Maybe that's the error.

//I try to use this for send Header is application/json
jsonBody = new JSONObject("{\"type\":\"example\"}");

That's not the header, so pass in null here to do GET

new JsonObjectRequest(url, null,

And towards the end of your request, override a method to request JSON

        ... 

        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e("TAG", error.getMessage(), error);
        }


    }) { // Notice no semi-colon here
        @Override 
        public Map getHeaders() throws AuthFailureError { 
            Map params = new HashMap();                
            params.put("Content-Type", "application/json");
            return params; 
        } 
    };