kotlin

// Define an interface for navigation keys
interface NavigationKey : Parcelable

// Example implementation for a specific screen
@Parcelize
data class ProfileKey(val userId: String) : NavigationKey

// Navigation manager class
class Navigator(private val context: Context) {

    fun navigate(key: NavigationKey) {
        val intent = when (key) {
            is ProfileKey -> Intent(context, ProfileActivity::class.java).apply {
                putExtra(EXTRA_USER_ID, key.userId)
            }
            // Add other cases for different NavigationKey implementations
            else -> throw IllegalArgumentException("Unknown navigation key: $key")
        }
        context.startActivity(intent)
    }

    companion object {
        const val EXTRA_NAVIGATION_KEY = "extra_navigation_key"
        const val EXTRA_USER_ID = "extra_user_id"
    }
}

// Usage in an Activity
class MainActivity : AppCompatActivity() {
    private lateinit var navigator: Navigator

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        navigator = Navigator(this)

        findViewById<Button>(R.id.btnOpenProfile).setOnClickListener {
            navigator.navigate(ProfileKey("user123"))
        }
    }
}

// Retrieving the key in the destination Activity
class ProfileActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_profile)

        val userId = intent.getStringExtra(Navigator.EXTRA_USER_ID)
        // Use userId to load profile data
    }
}