从 RecyclerView 中分离 ItemTouchHelper

Question

I have a RecyclerView with a working ItemTouchHelper . Everything works great, but I am wondering if there is a way I can detach the ItemTouchHelper from the RecyclerView without re-creating the list? For fun, this is the code I'm using to attach:

ItemTouchHelper.Callback callback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT)
{
    ...
};
mItemTouchHelper = new ItemTouchHelper(callback);
mItemTouchHelper.attachToRecyclerView(mPasswordList);

Ideally, I'd like to check a preference in say onResume() of the Activity this RecyclerView lives in and detach the ItemTouchHelper based on that.

Answer 1

您可以通过将 recyclerview 设置为 null 来从 RecyclerView 分离 ItemTouchHelper：

mItemTouchHelper.attachToRecyclerView(null);

Answer 2

My original motivation for this was to allow the user the ability to disable swipe actions on list items if they so choose. I assumed the way to do this was to detach the ItemTouchHelper from the RecyclerView . I have now found the ItemTouchHelper.SimpleCallback has the following method available to override:

@Override
public boolean isItemViewSwipeEnabled()
{
    return mSwipable;
}

So, returning the correct state here effectively turns off the swipe handling. I hope this helps someone in the future.

Answer 3

For me, to disable the entire ItemTouchHelper that attached to the RecyclerView just set it to null

mItemTouchHelper = null;

And to re-enable, set it to its value

mItemTouchHelper = new ItemTouchHelper(callback);