我正在使用Gson和RxJava进行翻新教程，有时会发出GET请求以返回列表，事情是我正在咨询的端点来自TMDA，而我想要的数据则嵌套在其中JsonObject，所以我对Gson和Retrofit还是陌生的，所以我不知道如何配置构建器来解析嵌套List中的数据，因为该教程仅显示了它如何直接与List一起使用，这是RetrofitConfig的代码：
+---------------+----------------+----------------------+----------------------+
| collection_id | actions_day_of | actions_1_days_after | actions_2_days_after |
+---------------+----------------+----------------------+----------------------+
| 001 | 4 | 1 | 0 |
+---------------+----------------+----------------------+----------------------+
这是我的建造者：
@GET("/3/discover/movie?api_key=${apiKey}&language=en-US&sort_by=popularity.desc&include_adult=false&include_video=false&page=1")
fun getMovies(): Single<List<Movie>>
}
这是API响应：
private val api = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.build()
.create(MoviesApi::class.java)
fun getMovies(): Single<List<Movie>> {
return api.getMovies()
}
对于更多电影来说，就像这样，因此我对其进行配置的方式收到了JsonObject，但它期望使用List来显示错误：
{
"page": 1,
"total_results": 10000,
"total_pages": 500,
"results": [
{
"popularity": 259.91,
"vote_count": 366,
"video": false,
"poster_path": "/aQvJ5WPzZgYVDrxLX4R6cLJCEaQ.jpg",
"id": 454626,
"adult": false,
"backdrop_path": "/qonBhlm0UjuKX2sH7e73pnG0454.jpg",
"original_language": "en",
"original_title": "Sonic the Hedgehog",
"genre_ids": [
28,
35,
878,
10751
],
"title": "Sonic the Hedgehog",
"vote_average": 7.1,
"overview": "Based on the global blockbuster videogame franchise from Sega, Sonic the Hedgehog tells the story of the world’s speediest hedgehog as he embraces his new home on Earth. In this live-action adventure comedy, Sonic and his new best friend team up to defend the planet from the evil genius Dr. Robotnik and his plans for world domination.",
"release_date": "2020-02-12"
},
{
"popularity": 253.357,
"vote_count": 4333,
"video": false,
"poster_path": "/7IiTTgloJzvGI1TAYymCfbfl3vT.jpg",
"id": 496243,
"adult": false,
"backdrop_path": "/TU9NIjwzjoKPwQHoHshkFcQUCG.jpg",
"original_language": "ko",
"original_title": "기생충",
"genre_ids": [
35,
18,
53
],
"title": "Parasite",
"vote_average": 8.6,
"overview": "All unemployed, Ki-taek's family takes peculiar interest in the wealthy and glamorous Parks for their livelihood until they get entangled in an unexpected incident.",
"release_date": "2019-05-30"
},
{
"popularity": 213.161,
"vote_count": 2415,
"video": false,
"poster_path": "/xBHvZcjRiWyobQ9kxBhO6B2dtRI.jpg",
"id": 419704,
"adult": false,
"backdrop_path": "/5BwqwxMEjeFtdknRV792Svo0K1v.jpg",
"original_language": "en",
"original_title": "Ad Astra",
"genre_ids": [
12,
18,
9648,
878,
53
],
"title": "Ad Astra",
"vote_average": 6,
"overview": "The near future, a time when both hope and hardships drive humanity to look to the stars and beyond. While a mysterious phenomenon menaces to destroy life on planet Earth, astronaut Roy McBride undertakes a mission across the immensity of space and its many perils to uncover the truth about a lost expedition that decades before boldly faced emptiness and silence in search of the unknown.",
"release_date": "2019-09-17"
},
{
"popularity": 171.658,
"vote_count": 776,
"video": false,
"poster_path": "/h4VB6m0RwcicVEZvzftYZyKXs6K.jpg",
"id": 495764,
"adult": false,
"backdrop_path": "/uozb2VeD87YmhoUP1RrGWfzuCrr.jpg",
"original_language": "en",
"original_title": "Birds of Prey (and the Fantabulous Emancipation of One Harley Quinn)",
"genre_ids": [
28,
35,
80
],
"title": "Birds of Prey (and the Fantabulous Emancipation of One Harley Quinn)",
"vote_average": 6.8,
"overview": "After her breakup with the Joker, Harley Quinn joins forces with singer Black Canary, assassin Huntress, and police detective Renee Montoya to help a young girl named Cassandra, who had a hit placed on her after she stole a rare diamond from crime lord Roman Sionis.",
"release_date": "2020-02-05"
},
{
"popularity": 154.297,
"vote_count": 2258,
"video": false,
"poster_path": "/pThyQovXQrw2m0s9x82twj48Jq4.jpg",
"id": 546554,
"adult": false,
"backdrop_path": "/cjTQSwcsfVdirSFSHNBXRGkxmWa.jpg",
"original_language": "en",
"original_title": "Knives Out",
"genre_ids": [
35,
80,
18,
9648,
53
]
因此，对于如何解决此问题的任何想法将不胜感激，我对这些主题还很陌生，因此请提前对不起。
这是我的模特，有人问过
Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $
答案 0 :(得分：1)
基本上，当您尝试将其解析为JSON数组时，您的响应是一个JSON对象。您的Model类Movie是您得到的响应。因此，如果您想要完整的回复，请使用
fun getMovies(): Single<Movie>
这将为您提供完整的响应，其中包含results: List<MovieData>的值以及返回的其他参数。
希望这对您有帮助
答案 1 :(得分：0)
您在这里建立了这样的响应模型，
data class Response(
@SerializedName("page")
val page: Int = 0,
@SerializedName("results")
val results: List<Result> = listOf(),
@SerializedName("total_pages")
val totalPages: Int = 0,
@SerializedName("total_results")
val totalResults: Int = 0
) {
data class Result(
@SerializedName("adult")
val adult: Boolean = false,
@SerializedName("backdrop_path")
val backdropPath: String = "",
@SerializedName("genre_ids")
val genreIds: List<Int> = listOf(),
@SerializedName("id")
val id: Int = 0,
@SerializedName("original_language")
val originalLanguage: String = "",
@SerializedName("original_title")
val originalTitle: String = "",
@SerializedName("overview")
val overview: String = "",
@SerializedName("popularity")
val popularity: Double = 0.0,
@SerializedName("poster_path")
val posterPath: String = "",
@SerializedName("release_date")
val releaseDate: String = "",
@SerializedName("title")
val title: String = "",
@SerializedName("video")
val video: Boolean = false,
@SerializedName("vote_average")
val voteAverage: Double = 0.0,
@SerializedName("vote_count")
val voteCount: Int = 0
)
}
像这样调用API，
@GET("/3/discover/movie?api_key=${apiKey}&language=en-US&sort_by=popularity.desc&include_adult=false&include_video=false&page=1")
fun getMovies(): Single<Response<List<Movie>>>
}
答案 2 :(得分：0)
将您的api原始json数据解析为map，然后获取名为“ results”的键。之后，使用对象映射器创建Movie POJO对象的数组
JsonParser springParser = JsonParserFactory.getJsonParser();
Map<String, Object> map = springParser.parseMap(jsonData);
objectMapper.configure(com.fasterxml.jackson.core.JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
Movie[] movies = objectMapper.readValue(map.get("results").toString().replace('=', ':'), Movie[].class);