Navigation Arch Component: Passing placeholder param for deeplink

Question

I am trying to implement a deeplink functionality using the new Navigation Component API v1.0.0-alpha05 but running into an issue.

Using Android Studio 3.3 Canary 7

Portion of my navigation_graph.xml

<fragment
    android:id="@+id/noteDetailFragment"
    android:name="com.myapp.notes.notedetail.NoteDetailFragment"
    android:label="@string/label_note_detail"
    tools:layout="@layout/note_detail_fragment">

    <argument
        android:name="noteId"
        android:defaultValue="0"
        app:argType="integer" />

    <action
        android:id="@+id/action_noteDetail_to_editNote"
        app:destination="@id/editNoteFragment" />

    <deepLink
        android:id="@+id/noteDetailDeepLink"
        app:uri="notesapp://notes/{noteId}" />
</fragment>

AndroidManifest.xml contains:

    <activity android:name=".presentation.MainActivity">
        <nav-graph android:value="@navigation/navigation_graph" />
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

I am testing my deeplink with adb shell am start -a android.intent.action.VIEW -d "notesapp://notes/2" com.myapp.notes

The noteId is not present in either NoteDetailFragmentArgs.fromBundle(arguments).noteId or arguments?.getInt("noteId", 0) (a default value of 0 is returned in both cases)

Printing out the Bundle shows that it is there:

[{android-support-nav:controller:deepLinkIntent=Intent { act=android.intent.action.VIEW dat=notesapp://notes/2 flg=0x1000c000 pkg=com.mynotes.notes cmp=com.mynotes.notes.presentation.MainActivity }, noteId=2}]

The same issue is observed if the deeplink uri is http://www.mynotes.com/notes/2

How do I access the noteId when deeplinking? Thanks!

Answer 1

As per this issue, arguments parsed from deep links are only added to the arguments Bundle as Strings.

Therefore you should retrieve the noteId via arguments?.getString("noteId")?.toInt() until that issue is fixed.