Kill fragment in navigation controller

Question

My flow of fragment is like this

Main -> A -> B -> C ->A

In fragment c, it has a submit button which will return to A. When I press back button in A, I want it back to Main. But it return to fragment c instead.

In fragment C, I use this

 findNavController().navigate(R.id.action_c_to_a)

nav_graph.xml

 <fragment
        android:id="@+id/fragmentC"
        android:name="xxx"
        android:label="xxx">
        <action
            app:launchSingleTop="true"
            app:popUpTo="@+id/fragmentA"
            app:popUpToInclusive="true"
            android:id="@+id/action_c_to_a"
            app:destination="@id/fragmentA" />
    </fragment>

Are you sure you have `A` in your stack, when you navigate to it? Your configuration is correctly setup and works as you want it to. — tynn, Jun 30 '19 at 08:34
I understand what you want to do. But you should implement "Up" navigation, not "Back" in this case. User should be expecting back as back, not back as up. — Fung, Jul 04 '19 at 06:30

score 12 · Accepted Answer · answered Jun 30 '19 at 18:04

12

Why not pop up to fragment A? You could just call findNavController().popBackStack(R.id.fragmentA, false) instead of navigating with an action.

answered Jun 30 '19 at 18:04

Alex H

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not working val action = CheckoutFragmentDirections.actionCheckoutFragmentToProductFragment() findNavController().navigate(action) – Mar 01 '21 at 17:19

score 0 · Answer 2 · answered Jul 02 '19 at 21:59

0

try to look at my complete solution with removing/killing fragment from backstack.

Navigation Component set transition animation programmatically

answered Jul 02 '19 at 21:59

Kebab Krabby

1,574
13
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score 0 · Answer 3 · answered Jul 04 '19 at 06:33

0

You can override the back button behavior to do this. Provide custom back navigation

answered Jul 04 '19 at 06:33

Fung

961
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score 0 · Answer 4 · answered Nov 07 '21 at 22:12

The idea is to set a app:popUpTo without setting app:destination. Indeed, setting a app:destination will create a fragment and add it to the backstack which is not what you want.

To you can just remove :

app:destination="@id/fragmentA"

If you have this :

app:popUpTo="@+id/fragmentA"

And it will really pop the backstack until fragmentA

Kill fragment in navigation controller

4 Answers4