An extension function for implementing a text change watcher on EditText

ComponentExtensions.kt

fun EditText.afterTextChanged(afterTextChanged: (String) -> Unit) {
    this.addTextChangedListener(object: TextWatcher {
        override fun afterTextChanged(s: Editable?) {
            afterTextChanged.invoke(s.toString())
        }

        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) { }

        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) { }
    })
}