Navigation architecture: How to manage proper navigation without using clearTask as it is deprecated

问题

While using navigation architecture as from here , here clearTask is deprecated.

My scenario is this: There are 2 screens Login and Registration, both have links to each other. So you can go to Registration from Login and also Login from Registration. But on back Press App should be closed.

It could simply be done by just adding clearTask to both actions as below.

<?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"
    android:id="@+id/nv_auth_phase"
    app:startDestination="@id/fragment_login">

    <fragment
        android:id="@+id/fragment_login"
        android:name="com.jobhook.ui.auth.login.LoginFragment"
        android:label="LoginFragment"
        tools:layout="@layout/fragment_login">
        <action
            android:id="@+id/nv_action_login_to_registration"
            app:clearTask="true"
            app:destination="@id/fragment_registration" />

    </fragment>


    <fragment
        android:id="@+id/fragment_registration"
        android:name="com.jobhook.ui.auth.registration.RegistrationFragment"
        android:label="RegistrationFragment"
        tools:layout="@layout/fragment_registration">


        <action
            android:id="@+id/nv_action_registration_to_login"
            app:clearTask="true"
            app:destination="@id/fragment_login" />
    </fragment>
</navigation>

But as it was deprecated I have tried other solution like adding popUpTo -> navigation graph's Id, making launchSingleTop to true in both actions. Nothing seems to work in my scenario.

I have checked this question also but didn't get a solution.

回答1:

You need to use in your action next code

app:popUpTo="@+id/fragment_login"
app:popUpToInclusive="true"

来源：https://stackoverflow.com/questions/53314555/navigation-architecture-how-to-manage-proper-navigation-without-using-cleartask