how to use it on Recycler view

[Xaus]

i'm using recycler view in a fragment in my app and i need to say something about first recyclerview item
using this code :

TutoShowcase.from(getActivity())
            .setContentView(R.layout.tuto)
            .on(recyclerView.getChildAt(1))
            .addCircle()
            .show();

but when i use "recyclerView.getChildAt(1)"
returns me this error :

java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewTreeObserver android.view.View.getViewTreeObserver()' on a null object reference

what can i do about this ?
thank's

[adnxy]

Same issue @florent37 could you assist please?

[florent37]

recyclerView.postDelayed(new Runnable(){
public void run(){
     TutoShowcase.from(getActivity())
            .setContentView(R.layout.tuto)
            .on(recyclerView.getChildAt(1))
            .addCircle()
            .show();

}
});```

[Xaus]

Nice Thank you