No Retrofit annotation found. (parameter #1)

Question

I want get RSS code from a URL with Retrofit and if I enter url staticly in the get annotation everything is OK but with dynamic url I get an error.

My

Answer 1

This happened to me when I was using suspend functions in the network service interface like so.

interface Service {
    @GET("chapters")
    suspend fun fetchChapters() : List<NetworkChapter>

I solved it by doing 2 things. 1. Using Gson instead of Moshi library. Remove moshi converter from retrofit and use Gson converter. 2. Removing coroutine converter factory from retrofit. I think this one was the main problem.

Answer 2

Also make sure you add @Query or @Field for all the parameters , depending on whether you issuing GET/POST.

eg:

@GET("/api/Books/GetAll")
void GetRecentBooks(@Query int Offset, Callback<List<Book>> cb);

Answer 3

Remove from retrofit interface all parameters that not belong to this.

Answer 4

I forgot to add @Field("")

Previously

   @POST("/api/verify-phone")
    @FormUrlEncoded
    fun sendOTP(phone_number: String): Observable<SignInResponse?>

Fixed

@POST("/api/verify-phone")
@FormUrlEncoded
fun sendOTP(@Field("phone")phone_number: String): Observable<SignInResponse?>

Answer 5

Please check the Path class you are using and make sure that the package is retrofit2.http.Path instead of org.simpleframework.xml.Path. It is a common Retrofit annotation mistake.

Answer 6

In my case, I just forgot to remove Callback parameter for the service call when I start using retrofit 2. Make sure you didn't do the silly mistake I did.