debounce_initial.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val bindings = ActivityMainBinding.inflate(layoutInflater)
        setContentView(bindings.root)

        with(bindings) {
            userInput.doAfterTextChanged { text ->
                userResult.text = text
            }
        }
    }
}