改造，onResponse方法不工作

Question

Im新的改造，試圖從一個Web服務器獲取數據，創建模型，接口，但這仍然不工作。問題（也許）在方法onResponse（）我添加到該方法Log.d和吐司，但我沒有看到日誌和吐司時啓動我的應用程序。爲什麼不工作？我可以理解，當我得到錯誤的響應或其他什麼，但onResponse（）不工作一般，我的想法。可能Toast不能工作有數據，但Log.d必須沒有它的工作，和Log.d沒有數據，只是代碼的迴應。我添加了所有的依賴和tryind在所有教程中都這樣做，我做了什麼錯誤以及我能做些什麼來解決這個問題？我也試着把這些數據放到適配器上，但是當啓動應用程序時，我在Log「RecyclerView：沒有附加適配器;跳過佈局」中出現錯誤，也許這是同樣的問題.onResponse不工作，適配器也不會創建，因爲適配器inilialze在onResponse方法，如果onResponse不起作用，setadapter到recyclerview不起作用to.And VideoApi類：

public interface VideoApi { 

    @GET("/videos/featured") 
    Call<List<Video>>getFeaturedVideo(); 
} 

視頻類：

public class Video { 

    @SerializedName("url") 
    @Expose 
    private String url; 
    @SerializedName("title") 
    @Expose 
    private String title; 
    @SerializedName("description") 
    @Expose 
    private String description; 
    @SerializedName("score") 
    @Expose 
    private Integer score; 

    /** 
    * 
    * @return 
    * The url 
    */ 
    public String getUrl() { 
     return url; 
    } 

    /** 
    * 
    * @param url 
    * The url 
    */ 
    public void setUrl(String url) { 
     this.url = url; 
    } 

    /** 
    * 
    * @return 
    * The title 
    */ 
    public String getTitle() { 
     return title; 
    } 

    /** 
    * 
    * @param title 
    * The title 
    */ 
    public void setTitle(String title) { 
     this.title = title; 
    } 

    /** 
    * 
    * @return 
    * The description 
    */ 
    public String getDescription() { 
     return description; 
    } 

    /** 
    * 
    * @param description 
    * The description 
    */ 
    public void setDescription(String description) { 
     this.description = description; 
    } 

    /** 
    * 
    * @return 
    * The score 
    */ 
    public Integer getScore() { 
     return score; 
    } 

    /** 
    * 
    * @param score 
    * The score 
    */ 
    public void setScore(Integer score) { 
     this.score = score; 
    } 

} 

FeaturedFragment：

public class FeaturedFragment extends Fragment { 
    RecyclerViewAdapter recyclerViewAdapter; 
    public static final String ROOT_URL = "https://api.vid.me/"; 
    public List <Video> videos; 
    RecyclerView recList; 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_featured, container, false); 
     recList = (RecyclerView) rootView.findViewById(R.id.cardList); 
     recList.setHasFixedSize(true); 
     LinearLayoutManager llm = new LinearLayoutManager(getActivity()); 
     llm.setOrientation(LinearLayoutManager.VERTICAL); 
     recList.setLayoutManager(llm); 
     try { 
      getVideos(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     return rootView; 
    } 

    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

    } 

    private void getVideos() throws IOException { 
     Retrofit retrofitAdapter = new Retrofit.Builder() 
.addConverterFactory(GsonConverterFactory.create()) 
       .baseUrl(ROOT_URL) 
       .build(); 
     final VideoApi videoApi = retrofitAdapter.create(VideoApi.class); 
Call<List<Video>> call = videoApi.getFeaturedVideo(); 
     call.enqueue(new Callback<List<Video>>() { 
      @Override 
      public void onResponse(Call<List<Video>> call, Response<List<Video>> response) { 
       Log.d("MainActivity", "Status Code = " + response.code()); 
       videos.addAll(response.body()); 
       recyclerViewAdapter = new RecyclerViewAdapter(videos); 
       String result = response.body().get(0).getTitle(); 
       Toast.makeText(getActivity(), result, Toast.LENGTH_SHORT).show(); 
       recList.setAdapter(recyclerViewAdapter); 
      } 

      @Override 
      public void onFailure(Call<List<Video>> call, Throwable t) { 

      } 
     }); 

    } 
} 

Answer 1

你的json響應返回數組Video對象。 變化List<Video>無處不在Call對象Videos 其中Videos類被定義爲 -

public class Videos { 
    List<Video> videos; 
} 

變化這樣的 -

Call<Videos> call = videoApi.getFeaturedVideo(); 
     call.enqueue(new Callback<Videos>() { 
      @Override 
      public void onResponse(Call<Videos> call, Response<Videos> response) { 
       Log.d("MainActivity", "Status Code = " + response.code()); 
       videos = response.body().videos; 
       recyclerViewAdapter = new RecyclerViewAdapter(videos);     
       recList.setAdapter(recyclerViewAdapter); 
      } 

      @Override 
      public void onFailure(Call<Videos> call, Throwable t) { 

      } 
     }); 

    } 

而且，變化 -

@GET("/videos/featured") 
Call<Videos>getFeaturedVideo();