Handling deep links in compose SingleActivity app without multiple app instances and ugly animation

Question

I have the SingleActivity app developed with Jetpack Compose and compose navigation.

I need to handle deep links with query parameters.

At the moment my implementation includes the definition of deep links in the NavHost and this is all.

But I have few issues with this approach:

• ugly animation with blinking after the splash screen when I try to navigate to the app by clicking on the deep link
• if app has already opened and I click on the link - I have 2 instances of the app in the recents

How can I solve these issues?

Answer 1

I solved it by changing launchMode of the MainActivity to singleTask. Previously it was a default standard mode:

android:launchMode="singleTask"

And adding handling deep link by NavHostController in the setContent function inside the onCreate method of MainActivity:

@AndroidEntryPoint
class MainActivity : FragmentActivity() {
    private val viewModel: AppViewModel by viewModels()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        actionBar?.hide()
        WindowCompat.setDecorFitsSystemWindows(window, false)

        setContent {
            val appState = rememberMyAppState()

            // add this
            DisposableEffect(Unit) {
                val listener = Consumer<Intent> {
                    appState.value.navController.handleDeepLink(it)
                }
                addOnNewIntentListener(listener)
                onDispose { removeOnNewIntentListener(listener) }
            }
         ...
         }
}

Also to fix blinking between splash and other app content I changed containerColor and contentColor of my main Scaffold