checkRange method

void checkRange([ int start = 0, int end = 0 ])

选中范围元素

Implementation

void checkRange([int start = 0, int end = 0]) {
  for (; start < end && start < size; start++) {
    if (!_checks.contains(item(start))) {
      _checks.add(item(start));
    }
  }
  notifyDataSetChanged();
}