为什么做的时候Nullable会出错

@Override
public View getView(int position, @androidx.annotation.Nullable View convertView, @androidx.annotation.NonNull ViewGroup parent) {
    return super.getView(position, convertView, parent);
    if(convertView == null){
        convertView = inflater.inflate(R.layout.calendar_text_day,parent,false);
    }
    int day = txtData.getDate();
    ((TextView) convertView).setText(String.valueOf(day));
    return convertView;
}