Android: how do I exclude a CardView's checkbox from a LongClick method?

I have CardViews in a ReyclerView list. I set up so that a LongClick on a CardView launches a DialogFragment. On the CardView is a checkbox and I want to exclude the checkbox from the LongClick method; that is, I don't want the DialogFragment to load if the checkbox is LongClicked. I added 'android:longClickable="false"' and 'android:focusable="false"' to the CardView layout but that did not work. How would I achieve?

Adapter file:    
...
public static class ListViewHolder extends RecyclerView.ViewHolder implements View.OnLongClickListener {

    CardView singleCardView;

    TextView cardBlankText1;
    TextView cardBlankTextNumstotal;
    CheckBox chkSelected;
    TextView cardBlankText2;
    TextView cardBlankText4;
    TextView cardBlankText5A;
    TextView cardBlankText5B;
    TextView cardBlankText6;
    TextView cardBlankText7;
    TextView cardBlankText8;

    public ListViewHolder(View itemView) {
        super(itemView);

        itemView.setOnLongClickListener(this);
        singleCardView = (CardView) itemView.findViewById(R.id.singlecard_view1);

        chkSelected = (CheckBox) itemView.findViewById(R.id.chkSelected);
        cardBlankText1 = (TextView) itemView.findViewById(R.id.cardBlankText1);
        cardBlankTextNumstotal = (TextView) itemView.findViewById(R.id.cardBlankTextNumstotal);
        cardBlankText2 = (TextView) itemView.findViewById(R.id.cardBlankText2);
        cardBlankText4 = (TextView) itemView.findViewById(R.id.cardBlankText4);
        cardBlankText5A = (TextView) itemView.findViewById(R.id.cardBlankText5A);
        cardBlankText5B = (TextView) itemView.findViewById(R.id.cardBlankText5B);
        cardBlankText6 = (TextView) itemView.findViewById(R.id.cardBlankText6);
        cardBlankText7 = (TextView) itemView.findViewById(R.id.cardBlankText7);
        cardBlankText8 = (TextView) itemView.findViewById(R.id.cardBlankText8);

        chkSelected.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick (View view){
                return true;
            }
        });
    } 
    @Override
    public boolean onLongClick(View view) {
        clickListener.onItemLongClick(getAdapterPosition(), view);
        return false;
    }
}

public void setonItemClickListener(ClickListener  clickListener) {
    ListAdapter.clickListener = clickListener;
}

public interface ClickListener {
    void onItemLongClick(int position, View view);
}