Retrofitを使ったonResponseメソッドのNPE

Question

私は、このレスポンシップライブラリを使ってonResponseメソッドからデータを取得しようとしています。しかし、今度はrespone == 0.私のアプリケーションのロジックを構築するために、コード== 200、新しい活動を開始する何か他のビルドエラーメッセージです。 私は、servise.Thatサービスは、オープンAPIを持ってvid.me右POSTメソッドを構築する方法をしようとしている私が必要なもの： https://docs.vid.me/#api-Auth-Create myFragment：

public class FeedFragment extends Fragment { 
    EditText username; 
    EditText password; 
    Button btnLogin; 

    public List<SignInResult> signInResult; 
    String username_value,password_value; 
    public static final String ROOT_URL = "https://api.vid.me/"; 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_feed, container, false); 
     username = (EditText) rootView.findViewById(R.id.user_name_field); 
     password = (EditText) rootView.findViewById(R.id.password_field); 
     btnLogin = (Button) rootView.findViewById(R.id.button_login); 
     btnLogin.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Authorize(); 
      } 
     }); 
     return rootView; 
    } 

    public void Authorize() { 
     Retrofit retrofitAdapter = new Retrofit.Builder() 
       .addConverterFactory(GsonConverterFactory.create()) 
       .baseUrl(ROOT_URL) 
       .build(); 
     final VideoApi videoApi = retrofitAdapter.create(VideoApi.class); 

     username_value = username.getText().toString(); 
     password_value = password.getText().toString(); 

     Call<SignInResults> call = videoApi.insertUser(username_value,password_value); 
     call.enqueue(new Callback<SignInResults>() { 


      @Override 
      public void onResponse(Call<SignInResults> call, Response<SignInResults> response) { 
       SignInResults results = response.body(); 
       Log.d("Response ==>> ", new GsonBuilder().setPrettyPrinting().create().toJson(results)); 

      } 

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

      } 
     }); 
} 
} 

APIインタフェース：

public interface VideoApi { 

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

    @GET("/videos/new") 
    Call<Videos> getNewVideo(); 

@Headers("Content-Type:application/x-www-form-urlencoded") 
    @FormUrlEncoded 
    @POST("/auth/create") 
    Call<SignInResults>insertUser(@Field("email") String username, 
          @Field("password") String password 
          ); 
} 

SignInResultクラス：

public class SignInResult { 
    public String getAuthorization() { 
     return authorization; 
    } 

    public void setAuthorization(String authorization) { 
     this.authorization = authorization; 
    } 

    public String getCode() { 
     return code; 
    } 

    public void setCode(String code) { 
     this.code = code; 
    } 

    @SerializedName("authorization") 
    @Expose 
    private String authorization; 
    @SerializedName("code") 
    @Expose 
    private String code; 

    public String getUsername() { 
     return username; 
    } 

    public void setUsername(String username) { 
     this.username = username; 
    } 

    @SerializedName("username") 
    @Expose 
    private String username; 

    public String getUser_id() { 
     return user_id; 
    } 

    public void setUser_id(String user_id) { 
     this.user_id = user_id; 
    } 

    @SerializedName("user_id") 
    @Expose 
    private String user_id; 
} 

SignInResultsクラス：

public class SignInResults { 
public SignInResult signInResult; 

    public List<SignInResult> getSignInResults() { 
     return signInResults; 
    } 

    List<SignInResult> signInResults; 
} 

Answer 1

あなたが適切に

Call<SignInResults> call = videoApi.insertUser(username_value,password_value); 
    call.enqueue(new Callback<SignInResults>() { 

     @Override 
     public void onResponse(Call<SignInResults> call, Response<SignInResults> response) { 
      if(response.isSuccessful()) { 
       SignInResults results = response.body(); 
       Log.d("Response ==>> ", new GsonBuilder().setPrettyPrinting().create().toJson(results)); 
      } 
      else { 
       // handle error 
      } 
     } 

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

     } 
    });