How to change selected item position to top in Recyclerview?

问题

I have recyclerview in that I want to change item's position dynamically to top after selecting the item of recyclerview.

Please suggest best way to achieve the above problem?

回答1:

You need to swap selected item with top item in list, then notify your adapter about position change. A sample code would look like:

Collections.swap(orderItems.getItems(), position, 0);
                notifyItemMoved(position, 0);

Hope it helps!

回答2:

Try this

String Item = List.get(position); 
List.remove(position);  // remove item from the list
List.add(0,removedItem); // add at 0 index of your list
notifyDataSetChanged();
linearLayoutManager.scrollToPositionWithOffset(0, 20); // scroll recyclerview to top 

OR

recyclerview.getLayoutManager().scrollToPosition(0)  // scroll recyclerview to top 

OR

recyclerview.smoothScrollToPosition(0);  // scroll recyclerview to top 

回答3:

add below code in onclick of item,

String removedItem = actualList.remove(position); 
//actualList is list used to populate recylerview and position is selected 
//item position
actualList.add(0,removedItem);
notifyDataSetChanged();

回答4:

If you have different cases like this, we can achieve this approach from @manohar-reddy and call notifyItemChanged(position) it will also call the onBindViewHolder, then update your layout accordingly.

*In this case, if the 0 item has a different layout from the other items

You might wanna read this reference for getting the item position correctly

thanks to @amit-srivastava answer and @manohar-reddy

来源：https://stackoverflow.com/questions/48921796/how-to-change-selected-item-position-to-top-in-recyclerview