Retrofit override method failure

Question

I am new to android programming and I am trying to connect to server with retrofit and get some data. I made a little example just to check if it would return some data. First there is a problem that I don't know if I even wrote the code to do what I want and second I get the errors:

"Error:(64, 52) error: is not abstract and does not override abstract method failure(RetrofitError) in Callback" and 2 errors " Error:(67, 13) error: method does not override or implement a method from a supertype"

Here is my code

 public class MainActivity extends ListActivity{
public static final String ENDPOINT = "http://tinoba.hostzi.com";
List<Jelovnik> jelovnik;
Button gumb;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    gumb = (Button)findViewById(R.id.gumb);



}

public void stisni(View view) {
    RestAdapter adapter = new RestAdapter.Builder()
            .setEndpoint(ENDPOINT)
            .build();
    JelovnikAPI api = adapter.create(JelovnikAPI.class);
    api.getFeed(new Callback<List<Jelovnik>>() {


        @Override
        public void onResponse(Response<List<Jelovnik>> response, Retrofit retrofit) {
            jelovnik = response.body();
            gumb.setText(jelovnik.get(0).getIme().toString());
        }

        @Override
        public void onFailure(Throwable throwable) {

        }
    });
}

} and my retrofit interface

public interface JelovnikAPI {
@GET("/read.php")
public void getFeed(Callback<List<Jelovnik>> response);

}

Answer 1

The version of Callback you are using is from Retrofit 2 and you are still using Retrofit 1.x . Callback has two methods, failure and success . Your callback should look like

new Callback<List<Jelovnik>>() {


    @Override
    success(List<Jelovnik> t, Response response) {

    }

    @Override
    public void failure(RetrofitError error) {

    }
});

Answer 2

Replace Throwable with RetrofitError :

@Override
public void onFailure(RetrofitError retrofitError) {

}