LazyExample.kt

class MainActivity : AppCompatActivity() {
    private val messageView : TextView by lazy {
        // runs on first access of messageView
        findViewById(R.id.message_view) as TextView
    }
  
   override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        
        setContentView(R.layout.activity_main)
        messageView.text = "Hello"
    }
}