构造函数中显示kotlin错误的默认值

您需要显式地将参数传递给主构造函数:

//init params
val subTShirtAdapter = ...
val context = ...
val tShirtBean = ...
val parentPosition = ...
val position = ...

//init viewModel
val vm = RowSubTShirtViewModel(subTShirtAdapter, context, tShirtBean, parentPosition, position)

除非将默认值指定给参数,例如:

class RowSubTShirtViewModel(private val subTShirtAdapter = YourAdapter(),...)

在您的情况下,您可以这样做:

class RowSubTShirtViewModel(val context: TShirtActivity, 
    private val subTShirtAdapter: SubTShirtAdapter, 
    val tShirtBean: CommonItemBean, 
    private val parentPosition: Int = 0, 
    private val position: Int = 0) : BaseObservable(), TShirtActivity.setSelectionSubRow {}

// and then create an instance
val vm = RowSubTShirtViewModel(yourContext, yourAdapter, yourShirtBean)

你没有使用 default arguments 在你的构造器里。如果你想用,它应该看起来像

class RowSubTShirtViewModel(
    private val subTShirtAdapter: SubTShirtAdapter = defaultSubTShirtAdapter,
    val context: TShirtActivity = defultContext,
    val tShirtBean: CommonItemBean = defaultTShirtBean,
    private val parentPosition: Int = defaultParentPosition,
    private val position: Int = defaultPosition) : BaseObservable(), TShirtActivity.setSelectionSubRow {}