I have a custom BttomSheetDialogFragment and I want to have round corners in top of Bottom View

This is my Custom class that inflates my layout that I want to appear from bottom

View mView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mView = inflater.inflate(R.layout.charge_layout, container, false);
    initChargeLayoutViews();
    return mView;
}

and also I have this XML resource file as background:

The problem is, when I set this resource file as background of my Layout's root element, the corners still are not rounded.

I can't use below code:

this.getDialog().getWindow().setBackgroundDrawableResource(R.drawable.charge_layout_background);

Because it overrides the default background of BottomSheetDialog and there won't be any semi-transparent gray color above my Bottom View.