CODEWITHSUNDEEP
androidandroid-architecture-navigationandroid-navigation-graphandroid-deep-link
Macs
Macs

Reputation: 199

NavDeepLinkBuilder arguments bundle not received in destination fragment

I have 2 nav host activities Activity A and Activity B with each their own set of navigation graphs. I want to navigate from FragmentA which is in a nav graph hosted by Activity A to FragmentB which is in a nav graph hosted by Activity B to accomplish that i tried explicit deep linking. However no matter how I am not able to retrieve the argument in FragmentB its always the default value. I am using safe args. What am I doing wrong?

update: it seems the problem starts with a not accessible nav graph. Looking a bit more closely at the Log i realized that NavController logged the following message

Could not find destination com.myapp.app:id/nav_graph_b in the navigation graph, ignoring the deep link from Intent....

the nav graph is hosted by the nav host activity B which is set in setComponentName. Why is the graph not accessible then?

the deeplink

val bundle = Bundle()
bundle.putInt("theIntKey", theInt)

val pendingIntent = NavDeepLinkBuilder(requireContext())
    .setComponentName(NavHostActivityB::class.java)
    .setGraph(R.navigation.nav_graph_b)
    .setDestination(R.id.fragmentB)
    .setArguments(bundle)
    .createPendingIntent()
    .send()

navgraph

  <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/nav_graph_b"
    app:startDestination="@id/fragmentC"
    tools:ignore="UnusedNavigation">
    
        <fragment
            android:id="@+id/fragmentB"
            android:name="FragmentB">
            <argument
                android:name="theIntKey"
                app:argType="integer"
                android:defaultValue="0" />
        </fragment>
        
           <!--  other fragments-->
           
    </navigation>

inside FragmentB

//all of these three methods return always the default value
val theIntFromBundle = requireArguments().getInt("theIntKey")

private val args: FragmentBArgs by navArgs()

requireActivity().intent.extras?.let {
    val args = FragmentBArgs.fromBundle(it)
}

Upvotes: 0

Views: 1616

Answers (1)

Rishabh Garg
Rishabh Garg

Reputation: 51

// For fragment

If you want to get argument in fragment (in your case FragmentB) then make sure you have that keyName in your nav_graph (in your case theIntKey). Now get it like below

val argValue = arguments?.getInt("theIntKey") // for int, getString() for string

// Your requireArguments().getInt("theIntKey") is also correct. Getting default 0 may indicate that "theInt" is also 0 make sure its not same as default value else code is correct for fragment.

// For Activity

if you want bundle value in activity then you can get it in extra's with a little trick as android encapsulate argument to directly accessible for fragments only so for activity...

val encapsulatedBundle = intent.extras?.getBundle("android-support-nav:controller:deepLinkExtras")

val argValue = encapsulatedBundle.getInt("theIntKey")

You can also get intent of activity inside fragment by :- requireActivity().intent.extras.......

Upvotes: 0

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