如何在 Kotlin 中为变量设置监听器

How to I set up an interface listener for detecting a variable change in Kotlin. I successful implemented the following in Java, but am running into issues doing it in Kotlin:

接口:

public interface InterfaceRefreshList
    {
    public void refreshListRequest();
    }

包含侦听器的类:

public class SignalChange
    {
    private static boolean refreshListSwitch;
    private static List<InterfaceRefreshList> refreshListListeners = new ArrayList<>();
    public static void setRefreshList(boolean value)
    {
    refreshListSwitch = value;
    for(InterfaceRefreshList l : refreshListListeners)
        l.refreshListRequest();
    }
    public static void addRefreshListListener(InterfaceRefreshList l)
        {
        refreshListListeners.add(l);
        }
    }

侦听器正在侦听的类:

public class FragmentBrowse extends Fragment
{
    public FragmentBrowse() /// Constructor
        {
        SignalChange.addRefreshListListener(() -> refreshList());
        }
    refreshList()
    {
    // do something
    }
}

要发出更改信号，请执行以下操作:

SignalChange.setRefreshList(true);

I can set up the interface and the signal class:

class SignalChange
{
    private var refreshListSwitch: Boolean = false
    var setSwitch: Boolean
        get() = refreshListSwitch
        set(value)
        {
            refreshListSwitch = value
        }

    private var refreshListListeners = ArrayList<InterfaceRefreshPersonsList>()
    fun sendRefreshSignal()
    {
        for(l in refreshListListeners) l.refreshPersonsList()
    }

    fun addRefreshListListener(l: InterfaceRefreshPersonsList)
    {
        refreshListListeners.add(l)
    }

}

But I cannot setup the listener in the FragmentBrowse class. The fragment class doesn't allow constructors.