What is the difference between creating a TextWatcher in Android on Kotlin?

Question

Android

What is the difference between the two ways to create a TextWatcher
1st way

val textChangedListener = object: TextWatcher{

        override fun afterTextChanged(p0: Editable?) {
        }

        override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
        }

        override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
            
        }

    }

2nd way

private object textChangedListener: TextWatcher{

        override fun afterTextChanged(p0: Editable?) {
        }

        override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
        }

        override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {

        }

    }

And in the 1st and 2nd ways, I can create a TextChangedListener, but I can't figure out which one is correct and what's the difference.

And by the way, in the 2nd way, I can't call the functions of the outer class.

Answer 1

Correct first. The word object has different meanings. In the first case, you create an object of an anonymous class that implements the listener. In the second case, you create a singleton textChangedListener of type textChangedListener (i.e. the names of the class and its only instance are the same. By the way, this is why singleton objects are usually named with a capital letter.). In the second case, of course, you cannot call other methods, because object is not an inner class. Thus, it is little more than completely useless.