I have an ExposedDropDownMenu that is extremely ~~laggy~~ de

Question

I have an ExposedDropDownMenu that is extremely ~~laggy~~ delayed when opening It takes like a good 4 seconds and yes this happens in release builds too I have a bunch of items it s a country picker actually My idea was I know lets make it Lazy but that leads to a crash Any ideas from anyone

Colton Idle · Answer

I m basically using the example here But once I wrap it in a Lazy I get a crash <https developer android com reference kotlin androidx compose material package summary DropdownMenu kotlin Boolean kotlin Function0 androidx compose ui Modifier androidx compose ui unit DpOffset androidx compose ui window PopupProperties kotlin Function1 |https developer android com reference kotlin androidx compose material package summary DropdownMenu kotlin Boolean Properties kotlin Function1 >

ryan.fonzi · Answer

Not a perfect solution but as a workaround you can just keep the dropdown closed on blank inputs Once they start typing the list of countries you re dealing with is already massively reduced by filtering

Colton Idle · Answer

Ooh We don t actually support filtering Just a plain old drop down right now

Francesc · Answer

I haven t tried this but what if you specify a height to the `ExposedDropDownMenu` to satisfy the lazy list requirement

Albert Chang · Answer

Use lazy list and give it a fixed width

Colton Idle · Answer

Interesting Can I just use the default width for these things Or is that the point that the width changes depending on the item

Albert Chang · Answer

There is no default width See <https kotlinlang slack com archives CJLTWPH7S p1650551844988929 thread ts=1650546872 176159 amp cid=CJLTWPH7S|this thread>

saket · Answer

I m curious do you see any perf difference if you try out <https github com saket cascade|cascade>

Colton Idle · Answer

oooh I thought cascade was only for like action overflow not necessarily for your standard drop down selector list If it is in fact for a normal drop down then I d love to give it a whirl love the smooth anims heart

saket · Answer

It s actually not designed to be used as an exposed dropdown but I m interested in seeing if it s perf is any different smile

Colton Idle · Answer

will give it a try later on

Colton Idle · Answer

Circled back to this today and I get the same crash If I add a height to the lazy column then I dont crash but then it doesn t scroll smile Thoughts ```ExposedDropdownMenu expanded = expanded onDismissRequest = expanded = false LazyColumn Modifier width 100 dp itemsIndexed list index selectionOption gt DropdownMenuItem onClick = selected index expanded = false Text text = selectionOption ```

ryan.fonzi · Answer

Yep same here I wonder if the nested scrolling is doing something weird The only other thing I can think of which probably works but is overkill is copying the implementation of `ExposedDropdownMenu` and replacing the use of `Column` internally with `LazyColumn`

Colton Idle · Answer

< Adam Powell> sorry for the ping but you commented on the previous thread that Albert dropped in here Do you have any idea how to use an ExposedDropDownMenu with LazyColumn