ListView: Keep list item at same position after click

Question

When I (long)click an item in my ListView, some list items change their heights (as intended) and the clicked item suddenly moves (sometimes even out of view). How can I keep it under my finger?

By using list.smoothScrollToPosition(), I can only choose which item (by index) will be the topmost visible one.

view.setTop() (in pixels) doesn't seem to do anything.

I also tried list.smoothScrollByOffset() (in pixels), but then I need to know how much my item has moved. But unfortunately view.getTop() before redrawing is the same as view.getTop() after redrawing.

Any idea?

list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        // some action changing the height of some list items
        notifyDataSetChanged();
        // How to bring the clicked list item back under my finger?
        return true;
    }
});

score 0 · Answer 1 · answered Oct 12 '18 at 17:06

Sorry for asking too quickly. After some more googling I found the solution in this question.

list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        int top = view.getTop();
        // some action changing the height of some list items
        notifyDataSetChanged();
        list.setSelectionFromTop(position, top);
        return true;
    }
});

ListView: Keep list item at same position after click

1 Answers1