Some Navigation Graph Actions Are Not Resolved

Question

I have multiple nav graphs in my projects each has multiple actions defined.

Lately, I am getting this error while Building the app preventing me from generating APK Unresolved reference: action...

This error appears in some actions only (4 exactly), not all of them. And I can't figure out why.

findNavController().navigate(MyAppClassDirections.actionTasksToFooClassDetails(
   item.requestNumber,
   item.id.toString(),
   ActionCode.Inbox //Enum
))

And this is the action declaration in NavGraph

<action
  android:id="@+id/action_tasks_to_foo_class_details"
  app:destination="@id/my_other_dest"
  app:enterAnim="@anim/slide_in_left"
  app:exitAnim="@anim/slide_out_right"
  app:popEnterAnim="@anim/pop_enter"
  app:popExitAnim="@anim/pop_exit">
    <argument
       android:name="requestNumber"
       app:argType="string" />

    <argument
       android:name="id"
       app:argType="string" />

    <argument
       android:name="actionCode"
       app:argType="com.myapp.data.ActionCode" />
</action>

Note: Same action like this is declared several times in the graphs and are working fine. Some how this specific declaration is causing the issue.

My conclusion so far: I don't think it is a code error. However, it is most likely a cache issue or something wrong with the navigation library.

I am using navigation:2.5.3

What I have done:

• Invalidate cache and restart Android Studio (Several Times).
• Clean/Rebuild project (Several Times).
• Removed the class and added it again.
• Renamed the action's id.

Nothing worked... :(

Any idea how to fix this??

Answer 1

It looks like you have to add some default value to enum that match with provided one as mentioned in documentation

So as per your code you can do like this

<argument
       android:name="actionCode"
       android:defaultValue="Inbox"
       app:argType="com.myapp.data.ActionCode" />

Please check this link https://developer.android.com/guide/navigation/navigation-pass-data#supported_argument_types