How to test deep links

Option 1

As per the documentation, run the following from Terminal.

adb shell am start -a android.intent.action.VIEW -d "https://example.com/?key1=value1&key2=value2"

Note that you have to escape & to %26 to pass more than one query parameter.

Result

Option 2

1. Open Android Studio.
2. Go to Menu bar > Run > Edit Configurations > General tab > Launch > URL.
3. Put the following in URL.

https://example.com/?key1=value1&key2=value2

4. Run the app.

Result

How to take an arbitrary query string in fragments

The following steps are already done in this sample app.

1. Create a navigation graph XML like res/navigation/nav_graph.xml.

<navigation xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_graph"
    app:startDestination="@id/FirstFragment">
    <fragment
        android:id="@+id/FirstFragment"
        android:name="com.github.tatsuyafujisaki.deeplinkarbitraryquerysample.FirstFragment" >
        <!-- The domain must ends with a trailing slash (i.e. example.com -> example.com/) to get a query string by KEY_DEEP_LINK_INTENT. -->
        <deepLink app:uri="example.com/" />
    </fragment>
</navigation>

2. Reference the navigation graph XML in AndroidManifest.xml.

<manifest xmlns:android="http://schemas.android.com/apk/res/android" ...>
    <application ...>
        <activity ...>
            <nav-graph android:value="@navigation/nav_graph" />
        </activity>
    </application>
</manifest>

3. Add the following in Fragment's onCreateView().

class FirstFragment : Fragment() {
    override fun onCreateView(...): View? {
        // ...
        
        val queryString = arguments
            ?.getParcelable<Intent>(NavController.KEY_DEEP_LINK_INTENT)
            ?.data
            ?.encodedQuery

        // ...
    }
}