"IllegalStateException: Expected BEGIN_OBJECT but was STRING" 文件中的 JSON 错误
"IllegalStateException: Expected BEGIN_OBJECT but was STRING" error in JSON file
我正在制作一个项目(用于在 uni 中编程 class)但是当我尝试在 Android Studio 中 运行 它时,模拟器中会非常短暂地出现一个警告:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 5 column 21 path $[0].dateOfBirth
这是我的 JSON 文件:
{
"fighters": [
{
"id": 1,
"name": "Karl",
"dateOfBirth": "20-03-1975",
"level": 4,
"image": "karl.png"
},
{
"id": 2,
"name": "Geralt",
"dateOfBirth": "16-08-1964",
"level": 8,
"image": "Geralt.png"
},
{
"id": 3,
"name": "Darrak",
"dateOfBirth": "25-11-1940",
"level": 5,
"image": "Darrak.png"
},
{
"id": 4,
"name": "Jafar",
"dateOfBirth": "09-02-1920",
"level": 9,
"image": "Jafar.png"
},
{
"id": 5,
"name": "Cornelius",
"dateOfBirth": "28-06-1988",
"level": 2,
"image": "Cornelius.png"
},
{
"id": 6,
"name": "Laila",
"dateOfBirth": "18-10-1998",
"level": 5,
"image": "Laila.png"
},
{
"id": 7,
"name": "Marianne",
"dateOfBirth": "01-03-1975",
"level": 7,
"image": "Marianne.png"
},
{
"id": 8,
"name": "Petro",
"dateOfBirth": "10-07-1974",
"level": 10,
"image": "Petro.png"
},
{
"id": 9,
"name": "Ordelia",
"dateOfBirth": "18-05-1985",
"level": 5,
"image": "Ordelia.png"
},
{
"id": 10,
"name": "Lucina",
"dateOfBirth": "21-09-1992",
"level": 9,
"image": "Lucina.png"
},
{
"id": 11,
"name": "Hugo",
"dateOfBirth": "16-07-1938",
"level": 6,
"image": "Hugo.png"
},
{
"id": 12,
"name": "Sildar",
"dateOfBirth": "19-12-1980",
"level": 3,
"image": "Sildar.png"
},
{
"id": 13,
"name": "Zenok",
"dateOfBirth": "30-10-1999",
"level": 1,
"image": "Zenok.png"
},
{
"id": 14,
"name": "Violet",
"dateOfBirth": "02-04-2001",
"level": 8,
"image": "Violet.png"
},
{
"id": 15,
"name": "Tamara",
"dateOfBirth": "13-06-1963",
"level": 4,
"image": "Tamara.png"
}
],
"encounters": [
{
"id": 1,
"fighterId": 1,
"amount_of_monsters": 4,
"difficulty": "Medium"
},
{
"id": 2,
"fighterId": 5,
"amount_of_monsters": 1,
"difficulty": "Easy"
},
{
"id": 3,
"fighterId": 5,
"amount_of_monsters": 2,
"difficulty": "Medium"
},
{
"id": 4,
"fighterId": 7,
"amount_of_monsters": 1,
"difficulty": "Hard"
},
{
"id": 5,
"fighterId": 11,
"amount_of_monsters": 7,
"difficulty": "Medium"
},
{
"id": 6,
"fighterId": 7,
"amount_of_monsters": 2,
"difficulty": "Easy"
},
{
"id": 7,
"fighterId": 14,
"amount_of_monsters": 10,
"difficulty": "Extreme"
},
{
"id": 8,
"fighterId": 13,
"amount_of_monsters": 4,
"difficulty": "Medium"
},
{
"id": 9,
"fighterId": 7,
"amount_of_monsters": 5,
"difficulty": "Hard"
},
{
"id": 10,
"fighterId": 3,
"amount_of_monsters": 5,
"difficulty": "Easy"
}
]
}
第 5 行是 "name":"Karl",
我的 dateOfBirth 属性有问题,我不知道为什么,因为对我来说语法看起来是正确的。我试过重新安装应用程序并重建项目,但没有用。
这是我第一次在 Whosebug 上发帖提问,如有不明之处请见谅。
如果有人能够提供帮助,我将不胜感激。
编辑(附加信息)
我正在使用 Android Studio 3.6,API 29.
Android Gradle 插件版本:3.5.3
Gradle版本:5.4.1
我使用 GSON 来解析 JSON
JDK11
这是我用于 GSON 的函数 class:
fun getFighters(): Observable<Array<Fighter>> {
val observable = Observable.create<Array<Fighter>> { emitter ->
try {
var connection = connect("${BASE_URL}/fighters")
val gson = GsonBuilder().create()
val fighters = gson.fromJson(
InputStreamReader(connection.inputStream),
Array<Fighter>::class.java
)
for (fighter in fighters) {
connection = connect("${BASE_URL}/${fighter.image}")
fighter.imageBitmap = BitmapFactory.decodeStream(connection.inputStream)
}
emitter.onNext(fighters)
} catch(e: Exception) {
emitter.onError(e)
}
}
return observable
}
BASE_URL 只是一个测试 url 因为我们必须做的任务不需要实际部署应用程序。 for 循环用于在 RecyclerView 列表中显示 Fighters 的图像,因此我使用了位图。此外,这是基本的战斗机数据class:
data class Fighter(
val id: Number,
val name: String,
val dateOfBirth: LocalDate,
val level: Number,
val image: String,
var imageBitmap: Bitmap
)
我认为您用于解析 JSON 的 class 应该修改如下。
data class Fighter(
val id: Number,
val name: String,
val dateOfBirth: String,
val level: Number,
val image: String,
var imageBitmap: Bitmap
)
dateOfBirth
在您的 JSON 中存储为 String
,您需要以这种方式获取它。如果您需要将值转换为 LocalDate
对象,您可以在解析信息后随时进行。希望对您有所帮助!
我正在制作一个项目(用于在 uni 中编程 class)但是当我尝试在 Android Studio 中 运行 它时,模拟器中会非常短暂地出现一个警告:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 5 column 21 path $[0].dateOfBirth
这是我的 JSON 文件:
{
"fighters": [
{
"id": 1,
"name": "Karl",
"dateOfBirth": "20-03-1975",
"level": 4,
"image": "karl.png"
},
{
"id": 2,
"name": "Geralt",
"dateOfBirth": "16-08-1964",
"level": 8,
"image": "Geralt.png"
},
{
"id": 3,
"name": "Darrak",
"dateOfBirth": "25-11-1940",
"level": 5,
"image": "Darrak.png"
},
{
"id": 4,
"name": "Jafar",
"dateOfBirth": "09-02-1920",
"level": 9,
"image": "Jafar.png"
},
{
"id": 5,
"name": "Cornelius",
"dateOfBirth": "28-06-1988",
"level": 2,
"image": "Cornelius.png"
},
{
"id": 6,
"name": "Laila",
"dateOfBirth": "18-10-1998",
"level": 5,
"image": "Laila.png"
},
{
"id": 7,
"name": "Marianne",
"dateOfBirth": "01-03-1975",
"level": 7,
"image": "Marianne.png"
},
{
"id": 8,
"name": "Petro",
"dateOfBirth": "10-07-1974",
"level": 10,
"image": "Petro.png"
},
{
"id": 9,
"name": "Ordelia",
"dateOfBirth": "18-05-1985",
"level": 5,
"image": "Ordelia.png"
},
{
"id": 10,
"name": "Lucina",
"dateOfBirth": "21-09-1992",
"level": 9,
"image": "Lucina.png"
},
{
"id": 11,
"name": "Hugo",
"dateOfBirth": "16-07-1938",
"level": 6,
"image": "Hugo.png"
},
{
"id": 12,
"name": "Sildar",
"dateOfBirth": "19-12-1980",
"level": 3,
"image": "Sildar.png"
},
{
"id": 13,
"name": "Zenok",
"dateOfBirth": "30-10-1999",
"level": 1,
"image": "Zenok.png"
},
{
"id": 14,
"name": "Violet",
"dateOfBirth": "02-04-2001",
"level": 8,
"image": "Violet.png"
},
{
"id": 15,
"name": "Tamara",
"dateOfBirth": "13-06-1963",
"level": 4,
"image": "Tamara.png"
}
],
"encounters": [
{
"id": 1,
"fighterId": 1,
"amount_of_monsters": 4,
"difficulty": "Medium"
},
{
"id": 2,
"fighterId": 5,
"amount_of_monsters": 1,
"difficulty": "Easy"
},
{
"id": 3,
"fighterId": 5,
"amount_of_monsters": 2,
"difficulty": "Medium"
},
{
"id": 4,
"fighterId": 7,
"amount_of_monsters": 1,
"difficulty": "Hard"
},
{
"id": 5,
"fighterId": 11,
"amount_of_monsters": 7,
"difficulty": "Medium"
},
{
"id": 6,
"fighterId": 7,
"amount_of_monsters": 2,
"difficulty": "Easy"
},
{
"id": 7,
"fighterId": 14,
"amount_of_monsters": 10,
"difficulty": "Extreme"
},
{
"id": 8,
"fighterId": 13,
"amount_of_monsters": 4,
"difficulty": "Medium"
},
{
"id": 9,
"fighterId": 7,
"amount_of_monsters": 5,
"difficulty": "Hard"
},
{
"id": 10,
"fighterId": 3,
"amount_of_monsters": 5,
"difficulty": "Easy"
}
]
}
第 5 行是 "name":"Karl",
我的 dateOfBirth 属性有问题,我不知道为什么,因为对我来说语法看起来是正确的。我试过重新安装应用程序并重建项目,但没有用。
这是我第一次在 Whosebug 上发帖提问,如有不明之处请见谅。 如果有人能够提供帮助,我将不胜感激。
编辑(附加信息)
我正在使用 Android Studio 3.6,API 29.
Android Gradle 插件版本:3.5.3
Gradle版本:5.4.1
我使用 GSON 来解析 JSON
JDK11
这是我用于 GSON 的函数 class:
fun getFighters(): Observable<Array<Fighter>> {
val observable = Observable.create<Array<Fighter>> { emitter ->
try {
var connection = connect("${BASE_URL}/fighters")
val gson = GsonBuilder().create()
val fighters = gson.fromJson(
InputStreamReader(connection.inputStream),
Array<Fighter>::class.java
)
for (fighter in fighters) {
connection = connect("${BASE_URL}/${fighter.image}")
fighter.imageBitmap = BitmapFactory.decodeStream(connection.inputStream)
}
emitter.onNext(fighters)
} catch(e: Exception) {
emitter.onError(e)
}
}
return observable
}
BASE_URL 只是一个测试 url 因为我们必须做的任务不需要实际部署应用程序。 for 循环用于在 RecyclerView 列表中显示 Fighters 的图像,因此我使用了位图。此外,这是基本的战斗机数据class:
data class Fighter(
val id: Number,
val name: String,
val dateOfBirth: LocalDate,
val level: Number,
val image: String,
var imageBitmap: Bitmap
)
我认为您用于解析 JSON 的 class 应该修改如下。
data class Fighter(
val id: Number,
val name: String,
val dateOfBirth: String,
val level: Number,
val image: String,
var imageBitmap: Bitmap
)
dateOfBirth
在您的 JSON 中存储为 String
,您需要以这种方式获取它。如果您需要将值转换为 LocalDate
对象,您可以在解析信息后随时进行。希望对您有所帮助!