How to implement Callback(Kotlin) before use Kotlin lib in Android Java

Question

Can you help me integrating a lib in Android (Java)? I have an issue in setOnRangeListener from Kotlin to Java.

In Java

custCalendar.setOnRangeSelectedListener(...?);

example Function In Kotlin

calendar_view.setOnRangeSelectedListener { startDate, endDate, startLabel, endLabel ->
    departure_date.text = startLabel
    return_date.text = endLabel
}

This will be called when the only a single day is selected for both SINGLE and RANGE type

calendar_view.setOnStartSelectedListener { startDate, label ->
    departure_date.text = label
    return_date.text = "-"
}

fun setOnStartSelectedListener(callback: (startDate: Date, label: String) -> Unit) {
    mOnStartSelectedListener = callback
}

fun setOnRangeSelectedListener(callback: (startDate: Date, endDate: Date, startLabel: String, endLabel: String) -> Unit) {
    mOnRangeSelectedListener = callback
}

How to implement this function?

Answer 1

Something like this in java, but I cant see the name of your interface so i leave this option :

custCalendar.setOnRangeSelectedListener(new OnRangeSelectedListener() {
    @Override
    public void onRangeSelected(@NonNull Object1 object, @NonNull Object2 object2) {

    }
  });

Answer 2

i think you can call it in class java try this code

 custCalendar.setOnRangeSelectedListener((startDate,label)->{
  
  // use parameters of function there

  return null
 });