MainActivity.kt

class MainActivity : Activity() {
    
    ...

    override fun onCreate(savedInstanceState: Bundle?) {
        ...
        mAdapter = MyAdapter(myDataset, {onClickActionItemList(it)}, {onClickActionButtonItemList(it)})
        ...
    }

    fun onClickActionItemList(item: String) {
        item.shortToast()
    }

    fun onClickActionButtonItemList(item: Double) {
        item.shortToast()
    }
}