IssueTracker

I'm having a problem with deep links in combination with the new navigation component. I wanna have two different URLs that lead to the same fragment in my app. The problem is that when I am starting the app with Android Studio launch options set to an URL and pass any of the mathing URLs, everything works fine. onNewIntent() is called once with the URL as intent extra. In contrast, when clicking a matching link (e.g. on the web or in the Gmail app), my app opens up and onNewIntent() in my main activity is called TWICE containing the clicked URL. As some sync operation is starting when my fragment is created with arguments, this causes some trouble.

What I expect: call onNewIntent() only once containing the URL, so that it can be handled by the navigation component to show my fragment.

What I get: onNewIntent() is called twice, so that my fragment is created twice and the sync operation starts a second time.




I setup two deep links the following way (identifiers changed):

  <fragment
    android:id="@+id/someFragment"
    android:name="com.example.courses.someFragment"
    android:label="someFragment"
    tools:layout="@layout/some_fragment">
       
    <deepLink app:uri="myURL/courses/{courses}"/>
    <deepLink app:uri="myOldURL/upload-courses/{courses}"/>

    <argument
      android:name="courses"
      app:nullable="true"
      android:defaultValue="@null"
      app:argType="string" />
  </fragment>

The layout of my main activity contains:

<fragment
    android:id="@+id/modulesNavHostFragment"
    android:name="androidx.navigation.fragment.NavHostFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:defaultNavHost="true"
    app:navGraph="@navigation/navigation_graph" />

In my main activity I'm overriding the onNewIntent() method to also catch deep links when the app is already running in the background (as stated out here https://developer.android.com/reference/kotlin/androidx/navigation/NavController#onhandledeeplink):

override fun onNewIntent(intent: Intent) {
  super.onNewIntent(intent)

  if(findNavController(R.id.modulesNavHostFragment).onHandleDeepLink(intent)){
    return
  }

  setIntent(intent)
}

I am using the following versions of the navigation component:

def nav_version = "1.0.0-alpha05"
implementation "android.arch.navigation:navigation-fragment-ktx:$nav_version"
implementation "android.arch.navigation:navigation-ui-ktx:$nav_version"

classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:1.0.0-alpha05"