Implementing Navigation Component with Deep Links in an Android App - Unique Challenges Faced
I'm trying to figure out I'm building a feature where I've been banging my head against this for hours. Currently developing an Android application that requires deep linking for some of its features. I’m using the Jetpack Navigation Component, which I initially thought would simplify the implementation. However, I'm running into trouble when trying to configure deep links properly. Here’s what I’ve done so far: 1. Defined my navigation graph in `res/navigation/nav_graph.xml` and included `<deepLink>` tags for the fragments I want to link to: ```xml <fragment android:id="@+id/detailsFragment" android:name="com.example.app.DetailsFragment" android:label="Details"> <deepLink app:uri="https://www.example.com/details/{itemId}" /> </fragment> ``` 2. In the `MainActivity`, I attempted to handle the intent within `onCreate()` to get the data passed in by the deep link: ```kotlin val navHostFragment = supportFragmentManager .findFragmentById(R.id.nav_host_fragment) as NavHostFragment val navController = navHostFragment.navController val intentData = intent.data if (intentData != null) { navController.navigate(intentData) } ``` So far, the deep link works when invoked from a browser, but I notice that the fragment isn’t displaying the data passed through the URL. I suspect it has something to do with how I’m handling the arguments in the `DetailsFragment`. My setup for receiving the arguments looks like this: ```kotlin class DetailsFragment : Fragment() { override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) val args: DetailsFragmentArgs = DetailsFragmentArgs.fromBundle(requireArguments()) // Use args.itemId here } } ``` While this seems straightforward, the `args.itemId` is always null when navigating via the deep link. I’ve checked the URI structure and the navigation graph definitions multiple times. Have I missed something crucial in setting up the deep link or the argument passing? Any insights on how to ensure that the `itemId` is correctly passed and received would be greatly appreciated. Also, are there any best practices for testing deep links during development, especially when using the Android Emulator? For context: I'm using Kotlin on Windows. I'd really appreciate any guidance on this. Hoping someone can shed some light on this.