可以使用类似的方式为所需类提供特定类型适配器绑定：

GsonBuilder builder = new GsonBuilder();
builder.registerTypeAdapter(Currency.class, getCurrencyTypeAdapter());
gson = builder.create();

TypeAdapter<Currency> getCurrencyTypeAdapter() {
    ConstructorConstructor constructorConstructor = new ConstructorConstructor(Collections.emptyMap());
    JsonAdapterAnnotationTypeAdapterFactory jsonAdapterFactory = new JsonAdapterAnnotationTypeAdapterFactory(constructorConstructor);
    ReflectiveTypeAdapterFactory reflectiveTypeAdapterFactory = new ReflectiveTypeAdapterFactory(
        constructorConstructor, FieldNamingPolicy.IDENTITY, Excluder.DEFAULT, jsonAdapterFactory);
    return reflectiveTypeAdapterFactory.create(new Gson(), new TypeToken<Currency>() {});
}

这是一个变通办法。理想情况下，您应该修复currency类的用法，并使用内部使用的默认类型适配器：currency.getinstance（）