我正在尝试从 API 获取数据。我的应用程序崩溃了，它给了我这个错误:
kotlinx.serialization.json.internal.JsonDecodingException: Expected start of the array '[', but had 'EOF' instead JSON input: { "generated_at": "2022-05-20T10:29:36+00:00", "summaries": [] }
我搜索了一个解决方案并找到了一个可以纠正 json 响应中的任何错误的网站，但不幸的是它没有用。
这是我的 json 响应(不是整个响应，只有一项):
{
"generated_at": "2022-05-20T09:40:26+00:00",
"schedules": [
{
"sport_event": {
"id": "sr:sport_event:27751052",
"start_time": "2021-08-13T19:00:00+00:00",
"start_time_confirmed": true,
"sport_event_context": {
"sport": {
"id": "sr:sport:1",
"name": "Soccer"
},
"category": {
"id": "sr:category:1",
"name": "England",
"country_code": "ENG"
},
"competition": {
"id": "sr:competition:17",
"name": "Premier League",
"gender": "men"
},
"season": {
"id": "sr:season:83706",
"name": "Premier League 21\/22",
"start_date": "2021-08-13",
"end_date": "2022-05-22",
"year": "21\/22",
"competition_id": "sr:competition:17"
},
"stage": {
"order": 1,
"type": "league",
"phase": "regular season",
"start_date": "2021-08-13",
"end_date": "2022-05-22",
"year": "21\/22"
},
"round": {
"number": 1
},
"groups": [
{
"id": "sr:league:56620",
"name": "Premier League 21\/22"
}
]
},
"coverage": {
"type": "sport_event",
"sport_event_properties": {
"lineups": true,
"extended_player_stats": true,
"extended_team_stats": true,
"lineups_availability": "pre",
"ballspotting": true,
"commentary": true,
"fun_facts": true,
"goal_scorers": true,
"scores": "live",
"game_clock": true,
"deeper_play_by_play": true,
"deeper_player_stats": true,
"deeper_team_stats": true,
"basic_play_by_play": true,
"basic_player_stats": true,
"basic_team_stats": true
}
},
"competitors": [
{
"id": "sr:competitor:50",
"name": "Brentford FC",
"country": "England",
"country_code": "ENG",
"abbreviation": "BRE",
"qualifier": "home",
"gender": "male"
},
{
"id": "sr:competitor:42",
"name": "Arsenal FC",
"country": "England",
"country_code": "ENG",
"abbreviation": "ARS",
"qualifier": "away",
"gender": "male"
}
],
"venue": {
"id": "sr:venue:53349",
"name": "Brentford Community Stadium",
"capacity": 17250,
"city_name": "London",
"country_name": "England",
"map_coordinates": "51.4907295,-0.2891696",
"country_code": "ENG"
}
},
"sport_event_status": {
"status": "closed",
"match_status": "ended",
"home_score": 2,
"away_score": 0,
"winner_id": "sr:competitor:50",
"period_scores": [
{
"home_score": 1,
"away_score": 0,
"type": "regular_period",
"number": 1
},
{
"home_score": 1,
"away_score": 0,
"type": "regular_period",
"number": 2
}
]
}
}]}
这是一些数据类:
@Serializable
data class Schedules(
@SerialName("generated_at")
val generatedAt: String,
@SerialName("schedules")
val schedules: List<Schedule>
)
@Serializable
data class Schedule(
@SerialName("sport_event")
val sportEvent: SportEvent,
@SerialName("sport_event_status")
val sportEventStatus: SportEventStatus
)
@Serializable
data class SportEvent(
@SerialName("competitors")
val competitors: List<Competitor>,
@SerialName("coverage")
val coverage: Coverage,
@SerialName("id")
val id: String,
@SerialName("sport_event_context")
val sportEventContext: SportEventContext,
@SerialName("start_time")
val startTime: String,
@SerialName("start_time_confirmed")
val startTimeConfirmed: Boolean,
@SerialName("venue")
val venue: Venue
)
日志:
E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-1
Process: com.example.a356scoresclone, PID: 19000
kotlinx.serialization.json.internal.JsonDecodingException: Expected start of the array '[', but had 'EOF' instead
JSON input: {
"generated_at": "2022-05-20T10:47:43+00:00",
"summaries": []
}
at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:24)
at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:32)
at kotlinx.serialization.json.internal.JsonLexer.fail(JsonLexer.kt:493)
at kotlinx.serialization.json.internal.JsonLexer.fail(JsonLexer.kt:215)
at kotlinx.serialization.json.internal.JsonLexer.unexpectedToken(JsonLexer.kt:198)
at kotlinx.serialization.json.internal.JsonLexer.consumeNextToken(JsonLexer.kt:188)
at kotlinx.serialization.json.internal.StreamingJsonDecoder.beginStructure(StreamingJsonDecoder.kt:37)
at kotlinx.serialization.internal.AbstractCollectionSerializer.merge(CollectionSerializers.kt:29)
at kotlinx.serialization.internal.AbstractCollectionSerializer.deserialize(CollectionSerializers.kt:43)
at kotlinx.serialization.json.internal.PolymorphicKt.decodeSerializableValuePolymorphic(Polymorphic.kt:63)
at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:32)
at kotlinx.serialization.json.Json.decodeFromString(Json.kt:100)
at com.jakewharton.retrofit2.converter.kotlinx.serialization.Serializer$FromString.fromResponseBody(Serializer.kt:30)
at com.jakewharton.retrofit2.converter.kotlinx.serialization.DeserializationStrategyConverter.convert(DeserializationStrategyConverter.kt:11)
at com.jakewharton.retrofit2.converter.kotlinx.serialization.DeserializationStrategyConverter.convert(DeserializationStrategyConverter.kt:7)
at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:243)
at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:153)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:520)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)
Suppressed: kotlinx.coroutines.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@34fb196, Dispatchers.IO]
编辑: 我刚刚意识到我有错误的端点。所以我没有写“schedules.json”，而是写了“summaries.json”。但我仍然有类似的错误:
kotlinx.serialization.json.internal.JsonDecodingException: Expected start of the array '[', but had 'EOF' instead
JSON input: .....match_status": "not_started"
}
}
]
}
最佳答案
你已经在日志中打印了你的 JSON，它被传递给解析器
{
"generated_at": "2022-05-20T10:47:43+00:00",
"summaries": []
}
你的解析器期待“schedules”数组(甚至是空的)，但没有找到这样的键(没有数组，没有对象，没有值)
所以实际上您的响应看起来不像发布的 JSON(有效)
关于android - 数组的预期开始 '[' ，但有 'EOF' 而不是，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/72317598/