private void selectShade(int position) {
ImageView shellSelected;
for (int i = 0; i < shadeAdapter.getItemCount(); i++) {
if (recyclerView.getChildAt(i) != null) {
shellSelected = ((ImageView) recyclerView.getChildAt(i).findViewById(R.id.shell_selected));
if (shellSelected.getVisibility() == View.VISIBLE) {
shellSelected.setVisibility(View.GONE);
}
}
}
GridLayoutManager layoutManager = (GridLayoutManager) recyclerView.getLayoutManager();
if (getSelectionMode() == SelectionModeEnum.SINGLE_SELECTION_MODE) {
View view = recyclerView.getChildAt(position - layoutManager.findFirstVisibleItemPosition());
if (shadeAdapter.getSelectedShade() == position) {
shadeAdapter.setSelectedShade(-1);
view.findViewById(R.id.shell_selected).setVisibility(View.INVISIBLE);
} else {
shadeAdapter.setSelectedShade(position);
view.findViewById(R.id.shell_selected).setVisibility(View.VISIBLE);
}
} else if (getSelectionMode() == SelectionModeEnum.MULTIPLE_SELECTION_MODE) {
if (selected.contains(position)) {
selected.remove((Integer) position);
} else {
selected.add(position);
}
shadeAdapter.setSelected(selected);
for (int item : shadeAdapter.getSelected()) {
if (item >= layoutManager.findFirstVisibleItemPosition()
&& item <= layoutManager.findLastVisibleItemPosition()) {
View view = recyclerView.getChildAt(item - layoutManager.findFirstVisibleItemPosition());
view.findViewById(R.id.shell_selected).setVisibility(View.VISIBLE);
}
}
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
gridLayoutManager = (GridLayoutManager) recyclerView.getLayoutManager();
visibleItemCount = recyclerView.getChildCount();
totalItemCount = gridLayoutManager.getItemCount();
firstVisibleItem = gridLayoutManager.findFirstVisibleItemPosition();
if (isVisible && scrollDist > MINIMUM) {
onHideShow(true);
scrollDist = 0;
isVisible = false;
} else if (!isVisible && scrollDist < -MINIMUM) {
onHideShow(false);
scrollDist = 0;
isVisible = true;
}
if ((isVisible && dy > 0) || (!isVisible && dy < 0)) {
scrollDist += dy;
}
if (loading) {
if (totalItemCount > previousTotal + 1) {
loading = false;
previousTotal = totalItemCount;
}
}
if (!loading && (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
current_page++;
onLoadMore(current_page, totalItemCount);
loading = true;
}
}
private void changeColumns() {
int firstVisible = layoutManager.findFirstVisibleItemPosition();
layoutManager.setSpanCount(columnsCount);
layoutManager.requestLayout();
adapter.notifyItemRangeChanged(firstVisible, 0);
}