This is one of my two screens when first launched as statusA kotlinlang #compose

This is one of my two screens, when first launched , as statusApp.lang has just been initialized the getListHeadlines is called, if I change the statusApp.fontSize, the headlines are redrawn but the headlines are not loaded which is what I want, but If I go to the next screen which is a detail screen, when I came back by pressing the back button and assigning the application screen to be again the headlines screen, I've got the elements reloaded as if stattusApp.lang would have changed.

Adam Powell

05/12/2020, 12:45 PM

Looks like you're mutating the list held by the

state

but not the

state

itself. The code above is roughly equivalent to

var list = mutableListOf(...)

but compose only knows when you change the

var

, not its contents.

Try

remember { modelListOf(...) }

Or use read-only or immutable lists as the value of the

State

Rather than having both the list reference and the list itself both mutable

modelListOf

will give you a mutable list where compose is tracking its content changes

MBegemot

05/12/2020, 1:19 PM

Well, I'm sure I'm doing it wrong, but is almost fascinating how far you can go wrong, I've got exactly what I want except that oddity on the backpress. I've found the information on state and effects to be rather scarce , and it looks some times that you have more than one option to obtain the same thing and that's confusing ... But I want to highlight that with all it's oddities I'm very satisfied with the results, I have just one file 500 lines and the equivalent in regular android would have been vastly more cumbersome.

🙂 2