handle deeplink within bottom navigation

[akshay253101]

Using handle deeplinks restarts the app to create correct backstack but to open deeplink within bottom navigation without restarting app.

fun BottomNavigationView.navigateDeeplink(
        navGraphIds: List<Int>,
        fragmentManager: FragmentManager,
        containerId: Int,
        uri: Uri) {
    navGraphIds.forEachIndexed { index, navGraphId ->
        val fragmentTag = getFragmentTag(index)

        // Find or create the Navigation host fragment
        val navHostFragment = obtainNavHostFragment(
                fragmentManager,
                fragmentTag,
                navGraphId,
                containerId
        )
        // Handle deeplink
        val canHandleDeeplink = navHostFragment.navController.graph.hasDeepLink(uri)

        if (canHandleDeeplink) {
            if (selectedItemId != navHostFragment.navController.graph.id) {
                selectedItemId = navHostFragment.navController.graph.id
            }
            navHostFragment.lifecycleScope.launchWhenResumed {
                // Wait for fragment to restore state from backStack
                // otherwise navigate will be ignored
                // Ignoring navigate() call: FragmentManager has already saved its state
                navHostFragment.navController.navigate(uri)
            }
        }
    }
}

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[akshay253101]

@googlebot I signed it!

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[nijat-ahmadli]

@akshay253101 In addition to this I had to prevent navController.handleDeepLink(intent) to be called automatically on onCreate() of the Activity with following code:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val uri = intent.data
    intent.data = null
}

Otherwise, my Activity still was getting created twice. For more details please refer to https://stackoverflow.com/a/63032780/3873867

[akshay253101]

@nijat-ahmadli The above solution has an issue that it will create multiple instance of same fragment. To avoid multiple instance and restart check this sample app for SingleActivity Architecture with multiple backstack https://github.com/beetlestance/android-extensions/tree/main/navigation