通過使用改進獲取arraylist

Question

我試圖實現從服務器使用Retrofit獲取arayList。 這裏是我做的：

適配器類

public class ItemTypeAdapterFactory implements TypeAdapterFactory { 

     public <T> TypeAdapter<T> create(Gson gson, final TypeToken<T> type) { 

      final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type); 
      final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class); 

      return new TypeAdapter<T>() { 

       public void write(JsonWriter out, T value) throws IOException { 
        delegate.write(out, value); 
       } 

       public T read(JsonReader in) throws IOException { 

        JsonElement jsonElement = elementAdapter.read(in); 
        if (jsonElement.isJsonObject()) { 
         JsonObject jsonObject = jsonElement.getAsJsonObject(); 
         if (jsonObject.has("updates") && jsonObject.get("updates").isJsonArray()) 
         { 
          jsonElement = jsonObject.getAsJsonArray("updates"); 
         } 
        } 


        return delegate.fromJsonTree(jsonElement); 
       } 
      }.nullSafe(); 
     } 
    } 

接口（API）

public interface Api { 
    @FormUrlEncoded 
    @POST("/tools/gps_event_api/") 
    public void updateUser(@Field("tag") String tag, @Field("version") String version, Callback<JSONResponse> fbLogin); 
} 

JsonResponse

public class JSONResponse { 
@SerializedName("update") 
SaleEven array; 
} 

用法：

Gson gson = new GsonBuilder() 
       .registerTypeAdapterFactory(new ItemTypeAdapterFactory()) // This is the important line ;) 
       .create(); 

     RestAdapter restAdapter = new RestAdapter.Builder() 
       .setEndpoint("http://www.poputchik-online.com") 
       .setConverter(new GsonConverter(gson)) 
       .build(); 

     Api service = restAdapter.create(Api.class); 
     retrofit.Callback<JSONResponse> callback=new retrofit.Callback<JSONResponse>() { 
      @Override 
      public void success(JSONResponse jsonResponse, Response response) { 
       Log.e("SUCESS",jsonResponse.toString()); 
      } 

      @Override 
      public void failure(RetrofitError error) { 
       error.printStackTrace(); 
      } 
     }; 

     service.updateUser(UPDATE_TAG, "-1",callback); 

我的JSON響應結構：

{ 
    "tag": "check_update", 
    "success": 1, 
    "error": 0, 
    "updates": [ 
    { 
     "uid": "47", 
     "shop_name": "Ashan", 
     "shop_address": "\u041c\u043e\u0441\u043a\u043e\u0432\u0441\u043a\u0438\u0439 \u043f\u0440\u043e\u0441\u043f\u0435\u043a\u0442 25", 
     "name": "\u0410\u0448\u0430\u043d", 
     "vip_priority": "1", 
     "event_type": "0", 
     "lat": "52.4978812", 
     "lon": "13.4055422", 
     "image_url": "uploads\/images3.jpeg", 
     "city_id": "2", 
     "version": "0", 
     "date_from": "2014-12-28 00:00:00", 
     "date_to": "2014-12-29 00:00:00", 
     "created_at": "2014-07-10 00:00:00", 
     "updated_at": "2014-07-10 00:00:00", 
     "comment_long": "ewrterwt", 
     "comment_short": "wertewrt" 
    }, 
    { 
     "uid": "48", 
     "shop_name": "Kvadrat", 
     "shop_address": "\u0432\u0443\u043b. \u0414\u0438\u043c\u0438\u0442\u0440\u043e\u0432\u0430, 7", 
     "name": "\u041a\u0432\u0430\u0434\u0440\u0430\u0442", 
     "vip_priority": "1", 
     "event_type": "0", 
     "lat": "52.7678812", 
     "lon": "13.3855422", 
     "image_url": "/uploads\/images1.jpeg", 
     "city_id": "2", 
     "version": "0", 
     "date_from": "2014-12-28 00:00:00", 
     "date_to": "2014-12-29 00:00:00", 
     "created_at": "2014-07-10 00:00:00", 
     "updated_at": "2014-07-10 00:00:00", 
     "comment_long": "ewrtwret", 
     "comment_short": "Privet" 
    }, 

    ] 
} 

SaleEven類：

@SerializedName("uid") 
    private long uid; 
    @SerializedName("name") 
    private String name; 
    @SerializedName("comment_short") 
    private String comment; 
    @SerializedName("comment_long") 
    private String longComment; 
    @SerializedName("shop_name") 
    private String shopName; 
    @SerializedName("shop_address") 
    private String shopAddress; 
.... 

我得到的錯誤：預期的目標，但發現陣列（GSON）

Answer 1

我想那一定是：

public class JSONResponse { 
@SerializedName("updates") 
List<SaleEven> array; 
} 

由於「更新」是一個JSON數組 - >將被映射到Java List類型。