OOhhh I fixed it with

new Handler().post(new Runnable() {
            @Override
            public void run() {
                addCategories(response);
            }
        });

I have Array list with some values ( Movies categories list ).

I’m trying to add the to ChipGroup programatically, but the are not added.

Look on this method.

private void addCategories(MovieDetailsResponse response) {
        ChipGroup chipGroup = mView.findViewById(R.id.categoriesChipGroup);
        for (int i = 0; i < response.getGenres().size()-1; i++) {
            Chip chip = new Chip(chipGroup.getContext());
            chip.setText(response.getGenres().get(i).getName());
            chipGroup.addView(chip);
        }
    }

When I debugging this method, so the genres size return me > 0 size ( array have genres ).

But when the debug comes to line Chip chip = new Chip(chipGroup.getContext());

The chips are not added and it’s throw an Exception :

public final class LambdaObserver<T> extends AtomicReference<Disposable>
        implements Observer<T>, Disposable, LambdaConsumerIntrospection {
    @Override
    public void onNext(T t) {
        if (!isDisposed()) {
            try {
                onNext.accept(t);
            } catch (Throwable e) {
                Exceptions.throwIfFatal(e);
                get().dispose();
                onError(e);
            }
        }
    }
}

Here is my xml:

<com.google.android.material.chip.ChipGroup
        android_layout_toEndOf="@id/movieDetailPosterContainer"
        android_layout_marginStart="10dp"
        android_id="@+id/categoriesChipGroup"
        android_layout_width="match_parent"
        android_layout_marginTop="10dp"
        android_layout_below="@+id/tvMovieDetailsTitle"
        android_layout_height="wrap_content">

    </com.google.android.material.chip.ChipGroup>