我使用 Kotlin 数据类与 Realm、Gson 注释来从服务器获取数据。
问题:当我在 Android Studio 中运行项目时,出现以下错误:
Error:Class "VenderConfig" contains illegal final field "name".
我正在学习 Kotlin,所以对此不太了解。
我的
VenderConfig
班级是:
@RealmClass
class VenderConfig(
@SerializedName("name")
val name: String? = null,
@SerializedName("website")
val wb_url: String? = null,
@SerializedName("icon")
val icon: String? = null,
@SerializedName("logo")
val logo: String? = null,
@SerializedName("description")
val description: String? = null,
@PrimaryKey
@SerializedName("id")
val id: Int? = null
) : RealmObject() {
}
我还尝试了
open
关键字与字段并删除了 data
关键字,但它没有解决问题。
您应该使用
var
关键字来声明可变属性。 val
代表不可变(最终)的。
var name: String? = null
name = "Kotlin" // OK
val immutableName: String? = null
immutableName = "Java" // won't compile, val cannot be reassigned
了解更多信息:属性和字段
课程不应该是开放吗? (我也是;)
@Realm-database:realm-java-3.1.0.zip xamples\kotlinExample\src\main\kotlin\io ealm xamples\kotlin\model\Person.kt
package io.realm.examples.kotlin.model
import io.realm.RealmList
import io.realm.RealmObject
import io.realm.annotations.Ignore
import io.realm.annotations.PrimaryKey
// ...
// Furthermore, the class and all of the properties
// must be annotated with open
// (Kotlin classes and methods are final by default).
//
open class Person(
...
) : RealmObject() {
// The Kotlin compiler generates standard getters and setters.
// Realm will overload them and code inside them is ignored.
// So if you prefer you can also just have empty abstract methods.
}