How to dynamically set headers in Retrofit (Android)

Question

I am using an API that uses an authorization scheme that requires a special \"X-Authorization\" header to be set to authenticate the request. For example, this Retrofit setu

Answer 1

Dynamic Header In Retrofit 2

I have struggled too much to add Dynamic Header In Retrofit 2.

I have gone through so many blogs and StackOver flow. Everyone has shown example with Interceptor.

And it’s not a wise thing ,just for one API call we need to do that much work.

You just have to add @HeaderMap as argument of fun. I have done in very simple way :-

In Kotlin

    val headers = HashMap()
    headers["KEY_AUTHORIZATION"] = "paste AUTHORIZATION value here"
    headers["KEY_TOKEN"] = "paste TOKEN value here"

    val jsonObject= JsonObject()

I am passing here header and other data also
Calling of fun:-

postEvent(headers,jsonObject)

API Declaration 

    @POST("/v1/post_data")
    fun postEvent(@HeaderMap headers: Map, @Body jsonObject: JsonObject): Call

API Declaration with RxAndroid

    @POST("/v1/post_data")
    fun postEvent(@HeaderMap headers: Map, @Body jsonObject: JsonObject): Single

2nd argument here i have JsonObject. You can replace with anything whatever you need to pass or you can remove it also.

In Java

 HashMap headers = new HashMap();
    headers.put("KEY_AUTHORIZATION","paste AUTHORIZATION value here");
    headers.put("KEY_TOKEN", "paste TOKEN value here");

    JsonObject jsonObject= new JsonObject();

I am passing here header and other data also

Calling of fun:-
postEvent(headers,jsonObject);

    API Declaration 
    @POST("/v1/post_data")
    Call postEvent(@HeaderMap Map headers, @Body JsonObject jsonObject);

API Declaration with RxAndroid

    @POST("/v1/post_data")
    Single postEvent(@HeaderMap Map headers, @Body JsonObject jsonObject);

2nd argument here i have JsonObject. You can replace with anything whatever you need to pass or you can remove it also.