Ensuring robust navigation across fragments with Deep Links in Android
I'm confused about I'm prototyping a solution and Working on a project where we need to implement deep linking for an Android app, I've noticed challenges in maintaining robust navigation across multiple fragments... The goal is to ensure that the user can arrive at specific screens directly from external links, but the navigation seems to break occasionally when launching from deep links. I have set up the <code>NavHost</code> and defined actions in the <code>nav_graph.xml</code>. The deep links appear to be correctly configured since they open the app, but navigating to certain fragments doesn't always work as intended. Here’s a snippet of my navigation graph: ```xml <fragment android:id="@+id/fragmentA" android:name="com.example.FragmentA" tools:layout="@layout/fragment_a"> <action android:id="@+id/action_fragmentA_to_fragmentB" app:destination="@id/fragmentB" /> <deepLink app:uri="https://www.example.com/fragmentA" /> </fragment> ``` To troubleshoot, I’ve tried using `findNavController().navigate()` in the `onCreate` method of my activity, ensuring that the arguments are passed correctly to avoid any null issues. Yet, sometimes the fragments do not load their data properly or show an empty state. Here’s how I’m attempting to navigate: ```kotlin if (intent?.data != null) { val navController = findNavController(R.id.nav_host_fragment) navController.handleDeepLink(intent) } ``` Additionally, I’ve configured my `AndroidManifest.xml` with appropriate intent filters: ```xml <activity android:name=".MainActivity" android:label="@string/app_name" android:launchMode="singleTask"> <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:host="www.example.com" android:scheme="https" /> </intent-filter> </activity> ``` The issue seems to arise when the app is in the background; launching through a deep link sometimes lands users on the main screen instead of the targeted fragment. I’m considering using the `setGraph()` method to explicitly load the navigation graph based on the deep link if it points to a different fragment. Has anyone else dealt with this kind of deep link navigation issue? Any insights into working with nested graphs or managing state across fragments would be greatly appreciated. Alternatively, are there best practices or design patterns in handling deep links that I might be missing? Looking forward to suggestions! I'm coming from a different tech stack and learning Kotlin. I'd be grateful for any help. My development environment is Ubuntu 22.04. What am I doing wrong?