Android navigation component - change root fragment?

Question

let's say I have fragments a->b->c , but "a" is a splash screen, so I want "b" to become first fragment in stack and throw "a" forever, so when I'm i "b" and press "back" system button - I close the app

In SupportFragmentManager I used replace() and that worked. But how can I achieve it here?

Mohammed Alaa · Accepted Answer · 2020-04-05 09:10:03Z

1

here is an example

graph.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
app:startDestination="@id/splashFragment">

<fragment
    android:id="@+id/splashFragment"
    android:name="com.example.***.fragments.SplashFragment"
    android:label="SplashFragment"
    tools:layout="@layout/layout_splash">
    <action
        android:id="@+id/action_splashFragment_to_homeFragment"
        app:destination="@id/homeFragment"
        app:popUpTo="@id/splashFragment"
        app:popUpToInclusive="true"/> // here to make home fragment as root
</fragment>
<fragment
    android:id="@+id/homeFragment"
    android:name="com.example.***.fragments.HomeFragment"
    android:label="HomeFragment"
    tools:layout="@layout/layout_home">
</fragment>
</navigation>

and in SplashFragment you just need to navigate to Home in OnCreate()

findNavController().navigate(R.id.action_splashFragment_to_homeFragment)

also if you want to do this in code only

findNavController()
    .navigate(R.id.action_splashFragment_to_homeFragment,
            null,
            NavOptions.Builder()
                    .setPopUpTo(R.id.splashFragment,
                            true).build()
    )

edited Apr 5, 2020 at 9:10

answered Apr 4, 2020 at 17:10

Mohammed Alaa

3,3302 gold badges22 silver badges24 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Vlad Alexeev Over a year ago

I have app:popUpToInclusive="true" in splash fragment and still app goes back to it

Mohammed Alaa Over a year ago

did you tried to update your navigation library to latest version

tosh17 Over a year ago

important, without app:popUpTo="@id/splashFragment" dont work

Collectives™ on Stack Overflow

Android navigation component - change root fragment?

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related