CODEWITHSUNDEEP
androidandroid-fragmentsandroid-jetpackandroid-jetpack-navigation
jack_the_beast
jack_the_beast

Reputation: 1971

Android Jetpack Navigations: navigate from "non-navigation" fragment

I'm using Jetpack Navigation in my app, I've now came across a situation I don't fully understand. I have a fragment CouponFragment which is supposed to be used in multiple places (inside other fragments via static xml tag and inside a bottomSHeetDialog not connected to navGraph). I need this fragment to be able to navigate to a WebviewFragment which is a destination in the navGraph. I added the navigation entry for CouponFragment:

In the most simple case (CouponFragment inside another navigation-connected fragment) the solution is pretty straight-forward, I added an action to the fragment which contains CouponFragment, for example:

<fragment
        android:id="@+id/navigation_results"
        android:name="ResultsFragment"
        tools:layout="@layout/fragment_results">
        <action
            android:id="@+id/action_webview"
            app:destination="@id/navigation_webview" />
    </fragment>

This works. The real problem comes when I try to navigate from CouponFragment which is inside a BottomSheetFragmentDialog. I tried adding an action to the navigation-connected fragment which invokes the dialog:

<fragment
        android:id="@+id/navigation_profile"
        android:name="ProfileFragment"
        android:label="@string/title_profile"
        tools:layout="@layout/fragment_profile">
        <action
            android:id="@+id/action_webview"
            app:destination="@id/navigation_webview" />
    </fragment>

but that results in this exeception:

java.lang.IllegalArgumentException: Navigation action/destination package.name:id/action_webview cannot be found from the current destination Destination(package.name:id/navigation_webview) class=WebViewFragment

which is strange becuase looks like is searching the action on the destination fragment. I tried adding a action_webview to navigation_webview:

just to see what would happen and nothing does. No logs are printed.

Could anyone give a hint on how to approach this problem?

Upvotes: 1

Views: 953

Answers (1)

zjmo
zjmo

Reputation: 675

I'll start to unswer to the main question only because the details is very ambiguous and edit if necessary.

To navigate from a non_navigation fragment:

  1. Use a deep link, here is the doc: https://developer.android.com/guide/navigation/navigation-deep-link

  2. Just use the ParentFragmentDirections and the current NavController.

So for example:

  • FragmentA with nested Non-Navigation-FragmentY
  • FragmentB

to navigate from FragmentY to FragmentB just load the NavController from the MainNavigationHostFragment and set as destination "FragmentADirections.actionFragmentA_to_FragmentB()"

Upvotes: 1

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