I have a question about how to deal with state in ...

# compose

[Brian Gardner]

I have a question about how to deal with state in an AdapterList. If I have actions in the individual row items that should update the view state, I’ve found that using a MutableState for the individual row views does not work. I’m guessing this is because even if the row view tries to set its state it still needs the state of the AdapterList to update in order to trigger the recomposition. My question then, is how should the state be updated for the AdapterList? In the itemCallback of AdapterList we only get the item passed to the lambda, not an index. Is it safe to grab the index of the item from within the itemCallback to update the list state?

[Brian Gardner]

Here’s the code with my current spike branch. I tried moving the state up to the AdapterList and updating the state using the index of the items but I’m not seeing the view recompose https://github.com/BrianGardnerAtl/JetpackComposePlayground/tree/adapter-list-state-spike

[Brian Gardner]

I tried both updating the list I got when calling state.value as well as updating state.value directly and neither work

[Adam Powell]

If the item composition isn't updating for model/state changes that sounds like it might be a bug in AdapterList

[Brian Gardner]

Ok, I should be able to file a bug ticket later on today

[Brian Gardner]

Issue link here https://issuetracker.google.com/u/3/issues/151860426

[Ryan Mentley]

Thanks, I'll have a look!