改造:无法创建适配器

Question

我正在对HTTP调用进行改造。但是app抛出以下异常：

02-21 14:07:40.527 21157-21157/com.PoparfilesE/AndroidRuntime:致命异常:主要进程: com.popularmovies，PID: 21157 java.lang.IllegalArgumentException:无法为com.entity.PopularMovies类为方法MovieDbAPI.getPopularMovies创建调用适配器在retrofit.MethodHandler.createCallAdapter(MethodHandler.java:47)的retrofit.Utils.methodError(Utils.java:177)在retrofit.MethodHandler.create(MethodHandler.java:26) at retrofit.Retrofit.loadMethodHandler(Retrofit.java:151)修改$1.调用(Retrofit.java:132)在$Proxy1.getPopularMovies(原生方法)在com.service.MovieServiceImpl.getPopularMovies(MovieServiceImpl.java:27) at com.popularmovies.MainActivityFragment.getPopularMovies(MainActivityFragment.java:49)在com.popularmovies.MainActivityFragment.onClick(MainActivityFragment.java:77) at android.view.View.performClick(View.java:4444)在android.view.View$PerformClick.run(View.java:18457) at android.os.Handler.handleCallback(Handler.java:733)在android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:136)在android.app.ActivityThread.main(ActivityThread.java:5113) at java.lang.reflect.Method.invokeNative(原生方法)在java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609) at dalvik.system.NativeStart.main(原生方法)原因: java.lang.IllegalArgumentException:无法找到类com.entity.PopularMovies的调用适配器。尝试：* retrofit.Retrofit.nextCallAdapter(Retrofit.java:207)的retrofit.ExecutorCallAdapterFactory在retrofit.Retrofit.callAdapter(Retrofit.java:175) at retrofit.MethodHandler.createCallAdapter(MethodHandler.java:45).再来18个

public class MovieServiceImpl implements MovieService{

private static String baseURL =  "http://api.themoviedb.org/3/discover/movie/";

private static String sortBy = "popularity.desc";
private static String key ="*****";

@Override
public PopularMovies  getPopularMovies(){

  Retrofit retrofit = Util.getRetrofit(baseURL);

  MovieDbAPI movieAPI = retrofit.create(MovieDbAPI.class);

  PopularMovies popularMovies =  movieAPI.getPopularMovies( sortBy, key );

  return popularMovies;
}
}

public class Util {


public static Retrofit getRetrofit(String baseURL){

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(baseURL)
            .addConverterFactory(GsonConverterFactory.create())
            .build();


    return retrofit;
}


}



 public interface MovieDbAPI {

 @GET
 PopularMovies getPopularMovies(@Query("sort_by") String sort_by,   @Query("api_key") String key);

}

Answer 1

试试这个：

@GET
Call<PopularMovies> getPopularMovies(@Query("sort_by") String sort_by, @Query("api_key") String key);

当您调用getPopularMovies方法时，请这样做：

同步请求

Call<PopularMovies> call = movieAPI.getPopularMovies(sortBy, key);
PopularMovies popularMovies = call.execute();

或异步请求

Call<PopularMovies> call = movieAPI.getPopularMovies(sortBy, key);
call.enqueue(new Callback<PopularMovies>() {
        @Override
        public void onResponse(Response<PopularMovies> response) {

        }

        @Override
        public void onFailure(Throwable t) {
        }
    });