Android notification putExtra() from Service

[adddeeee]

Hello!

I would like to get some extra data passed along within my notification, triggered from within my foreground service.

In the Service, I create an Intent and a PendingIntent. That works fine to trigger the notification. But I cannot seem to find a solution where I can pass extra information within the notification, to be opened when the user opens the app by clicking the notification.

Intent notificationIntent = new Intent(m_instance, org.qtproject.qt5.android.bindings.QtActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(m_instance, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

I've tried adding:

notificationIntent.putExtra("test", "testing");

but I get NULL in my onCreate() method of the Service:

public void onCreate() {
    super.onCreate();
    Log.i(TAG, "Creating Service");
    m_instance = QtAndroidService.this;
        
    Intent i = new Intent(m_instance, org.qtproject.qt5.android.bindings.QtActivity.class);
    
    String extra = intent.getExtras().getString("test");

}

What am I not understanding?