Disable adding fragment to backstack in Navigation Architecture Component
Alternatively you could use app:popUpTo
and app:popUpToInclusive
attributes in navigation xml
resource to cleanup back stack automatically when perform certain transactions, so back / up button will bring your user to the root fragment.
<fragment
android:id="@+id/fragment1"
android:name="com.package.Fragment1"
android:label="Fragment 1">
<action
android:id="@+id/action_fragment1_to_fragment2"
app:destination="@id/fragment2"
app:popUpTo="@id/fragment1"
app:popUpToInclusive="true / false" />
</fragment>
As mentioned by @bentesha this works in this way that it will pop fragments until fragmentC inclusively.
You can also achieve this as below:
NavController controller = Navigation.findNavController(view);
controller.popBackStack(R.id.fragmentA, false);
OR
NavController controller = Navigation.findNavController(view);
controller.popBackStack(R.id.fragmentB, false);
And this will pop up to fragmentA/fragmentB exclusively, I think it's most descriptive way for yourself and for others to understand.
Given R.id.fragmentC
is the name of C destination, from X destination, you can do the following:
NavController controller = Navigation.findNavController(view);
controller.popBackStack(R.id.fragmentC, true);
This should pop all destinations off the stack until before C, and leave either A or B on top of the stack.