My extra injector (just for String type so far)

IntentExtraString.kt

class IntentExtraString
{
	operator fun getValue(activity: Activity, property: KProperty<*>): String =
			activity.intent.getStringExtra(property.name)

	operator fun setValue(activity: Activity, property: KProperty<*>, value: String)
	{
		activity.intent.putExtra(property.name, value)
	}
}

SomeActivity.kt

class ClientOrHostActivity : BaseGameActivity(), GameInterface
{
	private val m_userName: String by IntentExtraString()
  
  ...
 }