Android + Retrofit 2 + Gson = Unable To Invoke No-args Constructor For Interface

I'm trying to use retrofit 2 in my app and i'm getting the folloing error: java.lang.RuntimeException: Unable to invoke no-args constructor for interface box.gov.br.ourapp.API.Clie

Solution 1:

I think there is a problem because you user same name for interface class and your Model class.

both are same name here ClientePFApi .

publicinterfaceClientePFApi {
    @GET("clientepf/{user}")
    Call<ClientePFApi> getClientePF(@Path("user") String user);
}

you use ClientePFVisao360 like below

publicinterfaceClientePFApi {
        @GET("clientepf/{user}")
        Call<ClientePFVisao360> getClientePF(@Path("user") String user);
    }

Solution 2:

You must to Change <Call> to <Response>

Solution 3:

if for example your api service method is this

interfaceExampleInterface{
     @POST("sample")suspendfunsampleFun(): Call<JsonObject>
}

change it to this

interfaceExampleInterface{
     @POST("sample")funsampleFun(): Call<JsonObject>
}