Android Navigation Component: Start at a different destination than home, programmatically?

Question

I\'m trying to implement a multiple navigation controller with multiple back stack BottomNavigationView, as per the github examples. However, the examp

Answer 1

We had a requirement wherein the displayed start screen would depend if the user has logged on, what we did was the following:

1. Remove app:startDestination on the navigation XML if it exists
2. On your main activity's XML, remove the following fields inside the tag: app:defaultNavHost="true" and app:navGraph

3. On our main Activity's onCreate(), we create a NavGraph object :

   NavController navController = Navigation.findNavController(this, R.id.your_nav_hostfragment);    
   NavGraph navGraph = navController.getNavInflater().inflate(R.navigation.your_navigation_xml);
   

4. Then depending on your requirement, you can set the start destination on the NavGraph using setStartDestination, then apply the NavGraph to the NavController:

       if (condition) {
           navGraph.setStartDestination(R.id.screen1);
       } else {
           navGraph.setStartDestination(R.id.screen2);
       }
       navController.setGraph(navGraph);