android - Caldroidlistener 在 Kotlin 下不起作用

Question

我正在尝试在我的软件中实现 Caldroid。为了检查用户是否点击了任何东西，我设置了一个这样的监听器：

val listener = object : CaldroidListener() {
        fun onSelectDate(date: Date, view: View) {
            Toast.makeText(
                applicationContext, formatter.format(date),
                Toast.LENGTH_SHORT
            ).show()
        }

        override fun onChangeMonth(month: Int, year: Int) {
            val text = "month: $month year: $year"
            Toast.makeText(
                applicationContext, text,
                Toast.LENGTH_SHORT
            ).show()
        }

        fun onLongClickDate(date: Date, view: View) {
            Toast.makeText(
                applicationContext,
                "Long click " + formatter.format(date),
                Toast.LENGTH_SHORT
            ).show()
        }

        override fun onCaldroidViewCreated() {
            Toast.makeText(
                applicationContext,
                "Caldroid view is created",
                Toast.LENGTH_SHORT
            ).show()
        }

}

然而：Android在“object”标签上报错，说：“Object is not abstract and does not implement abstract base class member public abstract fun onSelectDate(date: Date!, view: View!): Unit defined in com .roomorama.caldroid.Caldroidlistener'

有谁知道如何处理这个？