Kotlin 枚举

实例：

enum class SeasonType(val seasonName: String) {
    SPRING("春"),
    SUMMER("夏"),
    AUTUMN("秋"),
    WINTER("冬")
}

调用

private var cCount = 0
btn_class_enum.setOnClickListener { v ->
    text_class_enum.text = when (cCount % 4) {
        SeasonType.SPRING.ordinal -> SeasonType.SPRING.seasonName
        SeasonType.SUMMER.ordinal -> SeasonType.SUMMER.seasonName
        SeasonType.AUTUMN.ordinal -> SeasonType.AUTUMN.seasonName
        SeasonType.WINTER.ordinal -> SeasonType.WINTER.seasonName
        else -> "未知"
    }
    cCount++
}