Hello, Can someone please explain the problem of using key in lazy column? I’m facing the same probl...

# compose

[Saurav Suman]

Hello, Can someone please explain the problem of using key in lazy column?
I’m facing the same problem.

<https://stackoverflow.com/questions/74381205/removing-item-from-the-list-causes-wrong-display-in-lazycolumn>

[abbic]

as the reply to the question explains, you need the items inside the items callback to be associated with a key. that way, when an item is removed, the LazyColumn knows what is removed.

In that example, say each Person had a field called id, which was unique to it.
Then you'd write

items(people.size, key = { index -> people[index].id }) { etc ...

[Saurav Suman]

Someone told me there is a problem or crash while using key in lazy column, is it so?

[abbic]

this key function associates an index with an id, so when an item is removed and all the indices of the items change, the key callback now reconnects the index to the item it should contain properly

[abbic]

dont see why, have you tried it?

[Saurav Suman]

not yet

[abbic]

give it a go, if it crashes you then actually have an exception to google

[Saurav Suman]

good one 👍

[Saurav Suman]

Thanks abbic