Deep Linking & App Links

<activity android:name=".MainActivity">
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data
            android:scheme="myapp"
            android:host="product"
            android:pathPrefix="/detail" />
    </intent-filter>
</activity>

// Handle di Activity
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        handleDeepLink(intent)
    }

    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        handleDeepLink(intent)
    }

    private fun handleDeepLink(intent: Intent?) {
        val data = intent?.data ?: return
        // data = myapp://product/detail?id=123
        when (data.host) {
            "product" -> {
                val productId = data.getQueryParameter("id")
                navigateToProduct(productId)
            }
            "profile" -> {
                val userId = data.lastPathSegment
                navigateToProfile(userId)
            }
        }
    }
}

// Info.plist
// CFBundleURLTypes
// 
//   
//     CFBundleURLSchemes
//     myapp
//     CFBundleURLName
//     com.myapp
//   
// 

// SceneDelegate.swift
func scene(_ scene: UIScene, openURLContexts URLContexts: Set) {
    guard let url = URLContexts.first?.url else { return }
    handleDeepLink(url)
}

func handleDeepLink(_ url: URL) {
    guard let components = URLComponents(url: url, resolvingAgainstBaseURL: true) else { return }

    switch components.host {
    case "product":
        let productId = components.queryItems?.first(where: { $0.name == "id" })?.value
        navigateToProduct(productId)
    case "profile":
        let userId = components.path.trimmingCharacters(in: CharacterSet(charactersIn: "/"))
        navigateToProfile(userId)
    default:
        break
    }
}

// File: https://myapp.com/.well-known/apple-app-site-association
{
  "applinks": {
    "apps": [],
    "details": [
      {
        "appIDs": ["TEAMID.com.myapp"],
        "components": [
          {
            "/": "/product/*",
            "comment": "Product detail pages"
          },
          {
            "/": "/profile/*",
            "comment": "User profile pages"
          },
          {
            "/": "/order/*/track",
            "comment": "Order tracking"
          },
          {
            "/": "/share/*",
            "comment": "Share links",
            "exclude": true
          }
        ]
      }
    ]
  }
}

// AppDelegate.swift
func application(
    _ application: UIApplication,
    continue userActivity: NSUserActivity,
    restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void
) -> Bool {
    guard userActivity.activityType == NSUserActivityTypeBrowsingWeb,
          let url = userActivity.webpageURL else {
        return false
    }

    handleUniversalLink(url)
    return true
}

func handleUniversalLink(_ url: URL) {
    let pathComponents = url.pathComponents.filter { $0 != "/" }

    if pathComponents.first == "product",
       pathComponents.count > 1 {
        let productId = pathComponents[1]
        showProductDetail(id: productId)
    } else if pathComponents.first == "profile",
              pathComponents.count > 1 {
        let username = pathComponents[1]
        showProfile(username: username)
    }
}