void setHeadersVisiblity(boolean show) {
mShow = show;
final VerticalGridView listView = getVerticalGridView();
if (listView == null) {
return;
}
final int count = listView.getChildCount();
final int visibility = mShow ? View.VISIBLE : View.INVISIBLE;
// we should set visibility of selected view first so that it can
// regain the focus from parent (which is FOCUS_AFTER_DESCENDANT)
final int selectedPosition = listView.getSelectedPosition();
if (selectedPosition >= 0) {
RecyclerView.ViewHolder vh = listView.findViewHolderForPosition(selectedPosition);
if (vh != null) {
vh.itemView.setVisibility(visibility);
}
}
for (int i = 0; i < count; i++) {
View child = listView.getChildAt(i);
if (listView.getChildPosition(child) != selectedPosition) {
child.setVisibility(visibility);
}
}
}
void getHeaderViews(List<View> headers, List<Integer> positions) {
final VerticalGridView listView = getVerticalGridView();
if (listView == null) {
return;
}
final int count = listView.getChildCount();
for (int i = 0; i < count; i++) {
View child = listView.getChildAt(i);
headers.add(child);
positions.add(listView.getChildViewHolder(child).getPosition());
}
}