Question

使用改造，我需要调用一个Api，它会给我一个带有动态字段的json，动态字段会根据我提供的参数而变化。例如，对于“符号”参数“ ETH”，“ XRP”和“转换”参数“ USD”，响应将是以下Json：

<c xmlns:x="x">
    <a/>
</c>

我创建了如下ApiClass：

{
   "data":{
      "ETH":{
         "id":1027,
         "name":"Ethereum",
         "symbol":"ETH",
         "quote":{
            "USD":{
               "price":225.911630584,
               "volume_24h":9744372948.14671,
               "percent_change_1h":-2.87302,
               "percent_change_24h":-4.94698,
               "percent_change_7d":-26.9517,
               "market_cap":24152563209.793915
            }
         }
      },
      "XRP":{
         "id":52,
         "name":"XRP",
         "symbol":"XRP",
         "quote":{
            "USD":{
               "price":0.31390356279,
               "volume_24h":1610830847.99846,
               "percent_change_1h":-1.37633,
               "percent_change_24h":-0.0736244,
               "percent_change_7d":-21.4656,
               "market_cap":13361806194.547878
            }
         }
      }
   }
}

我有这个界面：

public class ApiConstants {
    public static String APP_KEY="xxxx-xxxx-xxxx-xxxx";
    public static String BASE_URL = "https://pro-api.coinmarketcap.com/";
    public static final String CRYPTOCURRENCYQUOTES="v1/cryptocurrency/quotes/latest";

我的改造：

public interface CoinToCoin {
    @GET(ApiConstants.CRYPTOCURRENCYINFO)
    Call<MainClass...base class that must be created> convertCoinToCoin(@Header("X-CMC_PRO_API_KEY") String appkey,                                                
               @Query("symbol") String 
coinToCoinConvertedCoinSymbol, @Query("convert") String 
coinToCoinSymbol);
}

在我的主要活动中，我必须实例化RetrofitClient

    public class RetrofitClient {
        private static RetrofitClient instance = null;
        private Retrofit retrofit;
        private OkHttpClient client;
        private CoinToCoin coinToCoin;

    private RetrofitClient() {

        OkHttpClient.Builder okHttpBuilder = new OkHttpClient.Builder();
        client = okHttpBuilder.build();
        retrofit = new Retrofit.Builder().baseUrl(ApiConstants.BASE_URL).addConverterFactory(GsonConverterFactory.create())
                .client(client)
                .build();

        coinToCoin= retrofit.create(CoinToCoin.class);
    }

    public static RetrofitClient getInstance() {
        if (instance == null) {
            instance = new RetrofitClient();
        }
        return instance;
    }

    public CoinToCoin getCoinToCoin() { return coinToCoin; 
}

}

，然后打电话检索我需要的数据：

private RetrofitClient retrofit;
retrofit = RetrofitClient.getInstance();

从我发现做到这一点的最佳方法是使用HashMaps和反序列化，但是我不怎么想。另外，我真的不知道我需要创建的类的外观。

请明确告诉我如何逐步进行操作。向新手求助。

Answer 1

就我个人而言，我会去找一张你说的地图。根据您的json，您可以为每个硬币定义一个对象：

UTF-8

我不确定数据是否总是相同，但如果不一致，则可以采用类似的方法：

<body onafterprint="myFunction()">

现在，您可以使用public class Quote { @SerializedName("price") private double price; @SerializedName("volume_24h") private double volume24h; @SerializedName("percent_change_1h") private double percentChange1h; @SerializedName("percent_change_24h") private double percentChange24h; @SerializedName("percent_change_7d") private double percentChange7d; @SerializedName("market_cap") private double marketCap; // getters and setters } public class Coin { @SerializedName("id") private int id; @SerializedName("name") private String name; @SerializedName("symbol") private String symbol; @SerializedName("quote") private Map<String, Quote> quote; // getters and setters }作为改造界面的响应。

改造：将具有2个动态字段（另一个字段）的Json转换为Gson

1 个答案: