Android clear backstack when leaving item tab BottomNavigation

Question

I am using the last navigation library (version 2.4.0) which include multiple backstacks with a bottom navigation view.

The default behavior is that each backstack is saved when user go back to a tab. I want to clear a backstack when the user leave a tab.

Based on this bottom nav with 3 tabs :

Tab1	Tab2	Tab3
ScreenA1	ScreenB1	ScreenC1
ScreenA2	ScreenB2	ScreenC2

From Tab1, if user:

Thanks

score 7 · Answer 1 · answered Jul 22 '22 at 07:41

7

You can turn off multiple backstacks for tabs, as it was before lib version 2.4. For this you should change

navView.setupWithNavController(navController)

to

NavigationUI.setupWithNavController(navView, navController, false)

answered Jul 22 '22 at 07:41

Ainege

Saved me after decades of pure agony. No sure why this is not the top answer. – Makari Kevin Jan 16 '23 at 22:41

score 0 · Answer 2 · edited Mar 29 '22 at 18:57

0

In your navigation file add these properties app:popUpTo and app:popUpToInclusive to the action which navigates to ScreenA2.

<action
    android:id="@+id/action_A1_to_A2"
    app:destination="@id/A2"
    app:popUpTo="@+id/A1"
    app:popUpToInclusive="true"/>

for more information look at this link: popUpTo example: circular logic

edited Mar 29 '22 at 18:57

goemic

answered Mar 28 '22 at 22:29

Khaled Abdelnabi

Thanks, the problem with this solution is that if I press back I lost the fragment (and I don't want it) – Pierre May 04 '22 at 15:42

score 0 · Answer 3 · edited Jul 09 '22 at 05:33

0

Try invoking the below before you invoke the method to navigate to TAB1.

navController.popBackStack(R.id.ScreenA1, false);

This worked for me wherein I had a similar scenario to you.

edited Jul 09 '22 at 05:33

Yunnosch

answered Jul 09 '22 at 05:27

pearleye

3

Please use a comment for the non-answering part I deleted. – Yunnosch Jul 09 '22 at 05:33
Please also remind that using other options as a workaround to your account limitation is not allowed. You will unlock the comment option at 50 reputations). – tacoshy Jul 09 '22 at 20:18
This does not provide an answer to the question. Once you have sufficient [reputation](https://stackoverflow.com/help/whats-reputation) you will be able to [comment on any post](https://stackoverflow.com/help/privileges/comment); instead, [provide answers that don't require clarification from the asker](https://meta.stackexchange.com/questions/214173/why-do-i-need-50-reputation-to-comment-what-can-i-do-instead). - [From Review](/review/late-answers/32207737) – Junaid Khalid Jul 15 '22 at 09:29

score -1 · Answer 4 · answered Feb 14 '22 at 17:54

-1

I just done by onNavigationItemSelected Listener

When you handle the click action for particular item, try this

         R.id.home_bottom_item -> {navController.popBackStack();
         navController.navigate(R.id.home_bottom_item)
     }

answered Feb 14 '22 at 17:54

4 Answers4