如何在翻新中使用Get请求解析嵌套的json对象？

Question

我想制作一个类似于Uber eats的简单应用，您可以在这里订购食物，我想使用下面的json对象获取数据，并使用翻新的get方法将其绑定到我的recyclerview。这是原始json文件的链接：https://pastebin.com/raw/xGGjGVD9

{
"categories": {
  "01": {
    "image": "http://web.archive.org/web/20160530195530if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-fingerfoods2.jpg",
    "name": "Finger Foods"
},
  "02": {
    "image": "http://web.archive.org/web/20160530200622if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-westernsoup1.jpg",
    "name": "Western Soup"
},
  "03": {
    "image": "http://web.archive.org/web/20160530163903if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-easternsoup.jpg",
    "name": "Eastern Soup"
},
  "04": {
    "image": "http://web.archive.org/web/20160530143505if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-sandwich.jpg",
    "name": "Sandwich"
},
  "05": {
    "image": "http://web.archive.org/web/20160531085702if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-pizza.jpg",
    "name": "pizza"
},
  "06": {
    "image": "http://web.archive.org/web/20160530202100if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-pasta1.jpg",
    "name": "pasta"
},
  "07": {
    "image": "http://web.archive.org/web/20160530202109if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-chicken.jpg",
    "name": "Chicken"
},
  "08": {
    "image": "http://web.archive.org/web/20160531085955if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-fish.jpg",
    "name": "Fish"
},
  "09": {
    "image": "http://web.archive.org/web/20160531025351if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-vegetarian.jpg",
    "name": "Chinese Vegetarian"
},
  "10": {
    "image": "http://web.archive.org/web/20160530195451if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-delights.jpg",
    "name": "Medifoods Delights"
},
  "11": {
    "image": "http://web.archive.org/web/20160531054218if_/http://medifoods.my/wp-content/uploads/2015/03/cover-menu-snacks.jpg",
    "name": "Snacks"
   }
 }
}

[到目前为止我所做的事情：我已经做了3个类，以从第一个对象中获取数字“ 01”的数据，但这仅仅是一个对象，我还有9个对象，如果我为每个对象都创建一个新类，我将有很多类。有没有更好的方法来解析此json对象，或者我必须为每个对象创建一个新类。

public class Properties {

@SerializedName("categories")
private Categories categories;

public Properties(Categories categories) {
    this.categories = categories;
}

public Categories getCategories() {
    return categories;
}

第二类：

public class Categories {

@SerializedName("01")
private Foods foods;

public Categories(Foods foods) {
    this.foods = foods;
}

public Foods getFoods() {
    return foods;
}

第三类：

public class Foods {

private String image;
private String name;

public Foods(String image, String name) {
    this.image = image;
    this.name = name;
}

public String getImage() {
    return image;
}

public String getName() {
    return name;
}

MainActivivy：

private void getFoodProperties() {
    Call<Properties> getFood = foodAPI.getProperties();
    getFood.enqueue(new Callback<Properties>() {
        @Override
        public void onResponse(Call<Properties> call, Response<Properties> response) {
            if (!(response.isSuccessful())) {
                Log.d(TAG, "onResponse: "+ response.code());
                return;
            }

            Log.d(TAG, "onResponse: " + response.body());
            foods.add(response.body());

            String name = foods.get(0).getCategories().getFoods().getName();
            String image = foods.get(0).getCategories().getFoods().getImage();
            Log.d(TAG, "onResponse: " + name + "  " + image);

        }

Api界面：

public interface FoodApi {

@GET("xGGjGVD9")
Call<Properties> getProperties();

}

Answer 1

我认为categories对象是json中food的列表，请尝试更改您的类别类。

public class Categories {

    @SerializedName("01")
    private List<Foods> foods;

    public Categories(Foods foods) {
        this.foods = foods;
    }

    public List<Foods> getFoods() {
        return foods;
    }
}

Answer 2

由于在JSON响应内的列表中具有动态键，因此需要使用Map来存储类别。

public class Properties {

    @SerializedName("categories")
    @Expose
    private Map<String, Foods> categories;

    public Map<String, Foods> getCategories() {
        return categories;
    }

    public void setCategories(Map<String, Foods> categories) {
        this.categories = categories;
    }
}

您可以遍历类别映射，该映射将具有键“ 01”，“ 02”，“ 03”等，其值作为Foods对象。如果您需要地图中的列表，可以执行以下操作

List<Foods> list = new ArrayList<Foods>(categories.values());