Android导航组件回栈

Question

i created a nav graph with fragments fragA->fragB->fragC-fragD->fragE->fragF->fragG. From some push notification user must directly go to fragG with findNavController().navigate(R.id.fragG) , and when user tap back button he must go to fragF, but now is back to first fragment of navigation graph because fragB->fragC-fragD->fragE->fragF is not added to back stack. It's possible to add this frag to stack when user navigate to last an press back button? Thanks.

Answer 1

Google team is working on the backstack issue

Issue tracker: https://issuetracker.google.com/issues/80029773#comment112

Meanwhile there is a workaround for it. Check this repo: https://github.com/android/architecture-components-samples/blob/master/NavigationAdvancedSample/app/src/main/java/com/example/android/navigationadvancedsample/NavigationExtensions.kt

Answer 2

It's not an official answer but it works as a workaround.

You can create the back stack manually by navigating sequentially.

fun openGFromPushNotification(){
   navigate(R.id.fragB)
   navigate(R.id.fragC)
   navigate(R.id.fragD)
   navigate(R.id.fragE)
   navigate(R.id.fragF)
   navigate(R.id.fragG)
}