This example demonstrates how to override TextWatcher's only after text changed method

textChangedDebounce.kt

fun TextInputEditText.textChangedDebounce(debounceTime: Long = 100L, action: (text: String) -> Unit) {
    this.addTextChangedListener(object : TextWatcher {

        private var lastTextChangedTime: Long = 0

        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
        override fun afterTextChanged(s: Editable?) {
            if (SystemClock.elapsedRealtime() - lastTextChangedTime < debounceTime) return
            else action(s.toString())
            lastTextChangedTime = SystemClock.elapsedRealtime()
        }

    })
}