Android 当类中的语句合并时发出

当两个Kotlin When语句位于类内时，如何组合它们？ 在这种情况下，声明是否会起作用

当创建一个闪存卡应用程序时，我最初的When语句是这样工作的，但它必须复制并粘贴在每个按钮的OnClickListener下面（一个向上计数，一个向下计数）

在检查代码以压缩它并使其更有效率和可读性之后，我将when语句移动到一个类中，但如果不像这样拆分when语句，就无法使其正常工作

class CardDeck(val current_card:Int=0) {
    private val nextCard = current_card

    fun chosenImage():Int{return this.image}

    fun chosenText():String{return this.words}  

    private val image = when (nextCard) {
        1 -> piston
        2 -> oil
        3 -> crank
        4 -> fourstrokeone
        5 -> block
        6 -> conrod
        7 -> head
        8 -> rings
        9 -> valve
        10 -> camshaft
        else -> engine
    }

    private val words = when (nextCard) {
        1 -> "Piston Assembly"
        2 -> "Engine Oil"
        3 -> "Crankshaft"
        4 -> "Engine Strokes"
        5 -> "Engine Block"
        6 -> "Connecting Rod"
        7 -> "Cylinder Head"
        8 -> "Piston Rings"
        9 -> "Valves"
        10 ->"Camshaft"
       }
}

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您可以将所有映射存储在一个映射中，并使用

nextCard

值获取所需的值

data class Image(val image: R.drawable, val words: String)
val map = mapOf(
    1 to Image( piston, "Piston Assembly"),
    2 to Image(oil, "Engine oil"))
    ... // rest of the mappings
)
val nextCard =  TODO()
val image = map[nextCard].image
val words = map[nextCard].words

data class Image(val image: R.drawable, val words: String)
val map = mapOf(
    1 to Image( piston, "Piston Assembly"),
    2 to Image(oil, "Engine oil"))
    ... // rest of the mappings
)
val nextCard =  TODO()
val image = map[nextCard].image
val words = map[nextCard].words