android - How to add static parametr to selected GET Retrofit calls? -

i have use lot of retrofit calls (get,put,detele,etc.). know, can calls, must set calls. have add 1 static parametr calls, best way it?

my call examples:

@get("user") call<user> getuser(@header("authorization") string authorization)  @get("group/{id}/users") call<list<user>> grouplist(@path("id") int groupid, @query("sort") string sort); 

i need gets add parametr: &something=true

i tried add way, require fix calls interface:

public interface apiservice {      string getparametervariable = "something"     boolean getparametervalue = true      @get("user")     call<user> getuser(@header("authorization") string authorization,                        @query(getparametervariable) boolean getparametervalue)  } 

this answer assume using okhttp retrofit.

you have add interceptor okhttpclient instance filters get requests , apply query parameter. can in way:

// add new interceptor okhttpclient instance. okhttpclient.interceptors().add(new interceptor() {     @override     public okhttp3.response intercept(chain chain) throws ioexception {         request request = chain.request();         // check method first.         if (request.method().equals("get")) {             httpurl url = request.url()                     .newbuilder()                     // add query parameter requests.                     .addqueryparameter("something", "true")                     .build();              request = request.newbuilder()                     .url(url)                     .build();         }         // proceed chaining requests.         return chain.proceed(request);     } });