package com.kishorebabu.popularmovies;

import com.kishorebabu.popularmovies.model.Movie;
import com.kishorebabu.popularmovies.model.MoviesList;

import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Path;
import retrofit.http.Query;

/**
 * Created by Kishore on 2/28/2016.
 */
public interface MovieDBApi {

    @GET("movie/{movieID}")
    Call<Movie> getMovieByID(@Path("movieID") int movieID, @Query("api_key") String apiKey);

    @GET("discover/movie?sort_by=popularity.desc")
    Call<MoviesList> getMostPopularMovies(@Query("page") int page, @Query("api_key") String apiKey);

    @GET("discover/movie/?sort_by=vote_average.desc")
    Call<MoviesList> getHighestRatedMovies(@Query("page") int page, @Query("api_key") String apiKey);
}

package com.kishorebabu.popularmovies;

import com.kishorebabu.popularmovies.model.Movie;
import com.kishorebabu.popularmovies.model.MoviesList;

import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Path;
import retrofit.http.Query;

/**
 * Created by Kishore on 2/28/2016.
 */
public interface MovieDBApi {

    @GET("movie/{movieID}")
    Call<Movie> getMovieByID(@Path("movieID") int movieID, @Query("api_key") String apiKey);

    @GET("discover/movie?sort_by=popularity.desc")
    Call<MoviesList> getMostPopularMovies(@Query("page") int page, @Query("api_key") String apiKey);

    @GET("discover/movie?sort_by=vote_average.desc")
    Call<MoviesList> getHighestRatedMovies(@Query("page") int page, @Query("vote_count.gte") int minVoteCount, @Query("language") String language, @Query("api_key") String apiKey);
}

Change query for highest rated to have more query parameters
Change query for highest rated to have  more query parameters
