Aug 21, 2023 · In the previous implementation, Modifier was exposed as a parameter from a Note composable so that list can add behaviour to it. First, you should not perform any IO operations on main thread which you're doing currently by reading from database. You can use the LazyListState. Let’s see this code: @Composable. If you want to see the starter code for this codelab, view it on GitHub. 3. Also, pay attention at how you define a LazyListState and pass it to the function (itemsListState parameter) and to your LazyColumn (state parameter) as well. LazyColumnNotUpdatingUIbug. itemsIndexed(list) { index, item ->. favourites = favourites + newList // add. verticalScroll()). mutableStateOf(false) MyApplicationTheme {. Jun 23, 2022 · However, even though the isAdded changes, the AddableItem does not recompose. Here I’m creating the tab bar, which takes in a list of categories to render the tabs, a currently selected tab index, and a tab click callback: @Composable. Missing key parameter. observeAsState() LazyColumn() { // <- Debugger stops Oct 6, 2021 · 0. Should i use a snapshot or please help how to do it. remove(item) Dec 19, 2022 · If you want to add a header before the list of items please add a header as a separate item() before the main items() inside the LazyColumn scope. However, despite recompose with new data list, the data object of each composable item remains the old one and does not update as expected. To prevent redundant recompositions, in such cases derivedStateOf should be used: it'll trigger recomposition only when the produced result, based on other state variables, is changed: val state = rememberLazyListState() I have tried several things and either is the list never updated when tapping the update button or only the first item is updated but not the rest of the items in the list. In the example above, the idea is to use this OtherLayout like a state. Here is the way, I call the composable: MyOrders(state. Wanting to make first contact with both technologies, I wanted to make a really simple app which populates a LazyColumn with images from Dog API. Example. dp. However, I have some functionalities that rely on LaunchedEffect(firstVisibleItemIndex) to complete, such as saving timeline position – . Feb 9, 2024 · The LazyColumn should store the scroll position by default. orders) {. The cleanest way of solving this problem is using key parameter: by default it's equal item index. stateList[index] = stateList[index]. May 20, 2022 · Pay attention to the way the predicate connects the index item (a letter ‘A’ to ‘Z’) with the first letter of the person’s surname. The solution to this problem is to avoid making the remaining vertical space infinite for the column that having a weight. I am completely new to Jetpack Compose AND Kotlin, but not to Android development in Java. getAllEmployees()) } } Jul 25, 2022 · One of the common reasons is nesting layouts like LazyColumn and Column(Modifier. value[event. Jan 6, 2023 · Clearly, there’s one downside here. Row() {. I have a companion object in my fragment, which is initially an empty mutableList: class MainTillLayoutFragment : Fragment() { companion object { var mBasket = mutableListOf<Product?>() } Jul 21, 2023 · When clicking the check box, nothing happens because its onCheckedChange does nothing. Oct 5, 2022 · That's the problem: all items in the screen get recomposed. copy(leaveApplied = event. Frame skipping happens when I fast-scroll the list. Feb 18, 2022 · I am updating the menuList State in the ViewModel, the view recomposes but the list doesn't get redrawn. The problem is that the items function that accepts a list is defined as an Extension function, so we need to import it to make it visible for use. answered Feb 14, 2022 at 3:35. Dec 16, 2021 · LazyColumn has state property, and if you pass your custom value instead of the default one, you can react on the state changes. Nov 23, 2023 · There are many problems in your code. But when clicking the row, it updates successfully. Here my code: val list = remember { mutableListOf<String>() } LazyColumn(. var productsList = remember { mutableStateListOf<Product>() }//I load products in this list. I'm looking to add/decrease quantity of each list item in LazyColumn individually. All the Retrofit connection part works OK, as I've managed to populate one card with a random puppy, but Apr 25, 2021 · After doing so , normally updating the list should work fine. Sep 16, 2021 · You can change the background of the lazy column elements depending on this state. Basically I have a paging data flow collected in a composable function: val list = state. I suggest you use Modifier as the last argument, so you don't need a comma at the end and you can add/remove/reorder modifiers easily: @Composable. value. answered Mar 15, 2023 at 6:02. Second, you don't need to pass MutableList<MyNotification> to @Composable just pass Jun 4, 2023 · Thank you for your answer, but I found that adding a new item to list[0], and the visibility = true is not executed because the lazycolumn recomposes the exampleComposable instead of creating a new one. Button(onClick = { viewModel. The Lazy components are different to most layouts in Compose. When I click the button, the items that are loaded in the list are not displayed. weight(1f) . Reading that property is considered a model read in Compose, so it will trigger a recomposition whenever the first visible item changes. collectAsState(initial = emptyList()) Instead of items, use itemsIndexed. Whenever I try to remove from the lazy column list I get arrayIndexOutOfBoundException This is the array that. I tried mutableStateListOf() , mutableStateOf() , I'm passing the QA(String) value to the TextField and updating the value by catching event in viewModel. If you like to stick with ArrayList, doing a map instead would work. I can do about the same layout on view system if I add fillViewport="true" on a ScrollView. If I remove the first item in a list of 3 items, I won't be able to remove the first item again in the resulting list of two items, because the index of the new first item is still 1 (or so Dec 10, 2023 · When I update the state it seems that the whole composable recomposes and lazy column seems to be created anew (it blinks and shows new content from the very beginning) At the same time layout inspector shows that recompositions for lazycolumn are skipped. I have searched for similar issues but cannot find anything. Oct 20, 2022 · 3. 2024-07-02. It'll be plain ignored. The second issue is the unnecessary LaunchedEffect as already noticed on the comments Nov 2, 2022 · Update. fillMaxWidth() for some Boxes in the composable layout, infinite recomposition in LazyColumn stopped. Consider using an data class for BilledProducts instead of a mutable class. You need to provide key for the LazyColumn 's items. Row(. Feb 7, 2024 · I am not able to explain why your code doesn't work. Apr 10, 2022 · I'm working on a shopping cart feature for my app. s. toMutableStateList() } Oct 25, 2022 · The LazyColumn contains Checkboxes. This behavior is not ideal as it disrupts the user experience. Here we used the size of the item as the key for this LaunchedEffect so when a new element is added, this side-effect will execute. index]. Feb 27, 2022 · You do not require mutableStateOf's usage at the place where you were calling it in your original code. In my app, I have used a coroutineScope to call method from DAO to Repository class. spacedBy(15. value = !expState. fun MyTabBar (. Only when the Home button is clicked and the application is opened again can the UI Nov 19, 2021 · 4. – Raw Hasan. Avoid backwards writes. There is however an issue on the Google Issue Tracker that describes the same problem. Jan 3, 2024 · Jan 2, 2024. All models and composables are stable. 20). attendanceStates. toList() But this is not updating the LazyColumn. Mar 4, 2022 · 5. May 22, 2022 · 11. Any modification (add, remove, clear, ) to the list will trigger an update in LazyColumn. productsList. Any ideas why? Thanks! MyView: val menuList = viewModel. On clicking back, I'm unable to update my list item with an Jul 27, 2022 · So basically LazyColumn shows only correct data the first time the widget is added. Feb 2, 2022 · 1. The code is below: val areAllChecked = rememberSaveable {. title) This creates a problem. Sarthak Mittal. Jul 5, 2023 · Handle Click Events in LazyColumn. value = attendanceStates. By default, each item's state is keyed against the position of the item in the list. I have an activity that has a list of items loaded through the Paging 3 library. map { 0 }. I fetch all my orders and show in the LazyColumn. Mar 23, 2023 · 2- Create your UI using LazyColumn and ScrollableTabRow: We need a Tab bar, a List which renders categories, and each category can contain its items. val items = MutableLiveData<SnapshotStateList<Items>>() fun removeItem(item: Items) {. Lazy loading, through components like LazyRow or LazyColumn in Jetpack Compose, can significantly boost your app’s speed. The issue was on the scope of the view model, as the accepted answer by @Philip. I'm using only one "remember" so if I click on add/decrease they all update at the same time. Jul 21, 2022 · modifier = Modifier. dp)) {. Whenever the user presses a certain button I do the following. Jan 17, 2023 · items(items = articles, key = { article -> article. copy(visible = true) Jun 13, 2023 · In this case, you have the index and the item as parameters. id } ) { message -> MessageRow(message) } } A LazyColumn is a vertically scrolling list that only composes and lays out the currently visible items. Jul 10, 2021 · println("Composing Order Item") // Item Code Here. This makes maybe sense, but this is IMO too overzealous and worth an issue report. Every 2 seconds, I simulate an update of that list (the original code was using RSocket, so this is for simplicity). In this article we’ll see how can we manage our list state and process data in background concurrently for multiple items and updating them on UI correctly. Apr 21, 2021 · I want to create chat app U I using ViewModel but when I send button the List in ViewModel update but LayzColumn not update it data. If it is not unique, you will get a runtime exception, so be careful. Dec 31, 2023 · In this case, the vertical space being infinite is not a problem. menuData. Row {. Defer reads as long as possible. When an update comes, there's no update of the LazyColumn view until I start scrolling. Aug 22, 2023 · UPDATE: We've realised I'm going to have to go about this in a different way. Rows allow us to align content Apr 17, 2022 · Conclusion. AppItem (. When the key is not the same since the last recomposition - AndroidView will be re Oct 4, 2021 · Lazy composablesIf you need to display a large number of items (or a list of an unknown length), using a layout such as Column can cause performance issues, since all the items will be composed and laid out whether or not they are visible. Jun 30, 2022 · We prepare a itemList of 20 items with id as index. If i update the checkbox, the event is propagated to the ViewModel and from there I'm changing the value in the list. Apr 21, 2021 · The problem is that the expression items. 2. Additional Resources. Sep 27, 2021 · 3. Both don't change when the timer isn't running and because both parameters don't change, the composable is skipped during the recomposition. The declarative nature of Compose allows you to describe the UI components concisely, resulting in less boilerplate code and improved app performance. mutableStateListOf makes the list, not its content, observable. mp4 Dec 19, 2022 · I'm writing example-screen with using lazyColumn. You need to use a MutableStateList<T>. Additionally, when I try to sort items, or try to write a query THAT WILL NOT SEND ANY API REQUEST, JUST CHANGES THE STRING IN TEXTFIELD, the UI recomposes. You might encounter common Compose pitfalls. Aug 2, 2022 · Eynnzerr Asks: Jetpack Compose: LazyColumn does not update items I have a lazyColumn receiving list from viewModel to create items: @Composable fun HomeList( modifier: Modifier = Modifier, dataList: List, listState: LazyListState = rememberLazyListState(), onClickItem: (Data) Nov 14, 2023 · If you are not using State correctly, the lazy column may not update when the state changes. I have a list of specialties from which the user will check. Extention function swapList() just combines clear() and addAll() calls to replace old list with new list. foundation dependency: Aug 21, 2023 · Whenever such a modifier is used directly inside the LazyListScope, all existing items are recomposed because a new instance of Modifier (with clickable {}) gets created which is not equal to the previous instance of the modifier. Consider taking the State-in-Compose codelab to learn further. Modifier. // Handle status change click listener. All the other updates are ignored by LazyColumn. In particular, the composable holding the "quantity" value gets recomposed in every single item in the lazy Nov 4, 2013 · Even not when explicitly specified by update attribute. It’s similar to a Recyclerview in the classic Android View system. I'll share the solution if I can figure it out. display) The code above will produce this output, adding new items to the first index and scrolling to it without the need of having too many LazyListState references. distinct() to help clear out any duplicates Jul 21, 2022 · The correct solution is to use this import: import androidx. Clicking on any list item would take me to a detailed screen and some manipulations happen there. If ListViewData is instance from data class you can do it as. Nov 11, 2023 · I have code to implement drag-and-drop in LazyColumn. But it seems Jetpack Compose do not like ArrayList very well, refer to this post: Jetpack Compose: LazyColumn not updating with MutableList. LazyColumn { items( items = messages, key = { message -> // Return a stable + unique key for the item message. Here’s how you would implement a click listener on list items: May 17, 2024 · In this codelab, you extend the app to read and display the data, and update and delete entities on the database using a Room library. Sep 4, 2021 · To implement the above screen, let’s use “item” inside LazyColumn and add a row that takes the remaining maximum width space and vertical padding of 25. I just need the column to update with the new data if there is any. Here is my ViewModel looks like: Apr 14, 2022 · But somehow values in the ViewModel are changing, but not reflected in UI ( not recomposing with new qty value) I think problem lies in this part : LazyColumn {items(cartInfo. Jetpack compose always needs a state object to be modified before recomposition can occur. Jetpack compose no longer uses LazyColumnFor so I've updated the answer to reflect the current state of compose. Mar 6, 2021 · There's not (currently) a built-in way to do this, which is a reasonable feature request. Nov 20, 2022 · For SnapshotList to trigger you need to add, delete or update existing item with new instance. Specialty List. Click of an item was handled inside LazyColumn of NotesScreen Nov 21, 2023 · I have tried using this method. My Mar 16, 2022 · The LazyColumn does not show me the list of items. value }) {} When you do something like this, expState won't be updated when the isExpanded argument is changed. There is no difference between "update the specific item in the list" and "the whole list got updated". I think @Leviathan's answer is basically about it, and using Hilt doesn Jul 27, 2022 · Add tests to verify that the root ID is not a reserved ID. value?. I encountered some performance issues on release build. However, when I tap any of the checkboxes, the state in the view model changes but checkbox is still unchecked. For example use:-. dp) . Please watch the attached video to get a clear understanding of the issue. Nov 5, 2022 · The problem is, however, that index (and lastIndex) inside the rememberDismissState is not up-to-date with the actual index of the itemsIndexed. For example, if I add item 1, at that time list={1}, the Text(text="1") will have an animation. Currently you are updating visible property of existing item. This is code i used in viewmodel to update the item object 4 days ago · I wanna create a screen with your really cool library but I got a issue with blur I wanna create a blue anything below my textField and I do it but while I scroll my list of items the blur does not update by the scroll and the scroll displays the outdated blur info. Any insights, code snippets, or suggested approaches to Sep 8, 2023 · Button(onClick = { expState. listFlow. It’s quite common to have click events for items in a list. background(Color. How make it reflect and persist the state even when scrolled on and off . itemsIndexed(list) {idx, row -> SomeListItem(row)} Let me know if the above works. guesses the last item by subtracting last index of dataset from first visible item and checking if it's equal to visible item count. Compose UI is a declarative UI system. Dec 1, 2021 · An other problem is that you may have change the items order. map { i ->. firstVisibleItemIndex will not update and will always remain the initial value. LazyColumn produces a vertically scrolling list, and LazyRow produces a horizontally scrolling list. Jan 20, 2024 · I have a LazyColumn in which items() exist that holds 5 checkboxes, and the state of these can be controlled by a single parent variable as well as with a specific variable. item {. lazy. Edit: while working on the fix I experienced some Gradle dependencies caching problems. Similar to mutableListOf() (for MutableList) there is mutableStateListOf() to create a SnapshotStateList. collectAsLazyPagingItems() Each item on the list has a call-to-action button that will enable/disable the view and update the UI of the corresponding item. These mistakes might give you code that seems to run well enough, but can hurt your UI performance. With Jetpack Compose’s LazyColumn, creating efficient lists in Android apps has become easier and more intuitive than ever. The goal is to ensure a seamless user experience without unexpected scrolling interruptions. Use SnapshotStateList instead of a MutableList if you want your composable to update on list changes. wrapContentSize(unbounded = true) or wrote a custom layout. I know that in Jetpack Compose you have to change the state of the passed in data in order to trigger a recomposition of the UI to update the UI with any changes. 31. However, when a single order is updated, the entire LazyColumn gets rrecomposed. There are could be other reasons for this to happen: your ComposeView was added into a LinearLayout with some weight, you applied Modifier. cartItems){} as cartItems is not directly a state value that's why not triggering the recomposition of the LazyColumn UI. Change it back to mutableStateOf now, as that is the recommended way in Compose. Compose assumes that whenever you read a state, you don’t update its value in composable immediately. Jan 7, 2022 · Why is my list not updating? I spent the whole day yesterday, debugging this and researching but I couldn't find anything to help me. at. However, the scroll API is flexible enough that we can add it ourselves. When a new piece of data is added, a new piece of data is added to the database, but the UI interface is not updated accordingly. Aug 8, 2021 · I've initially used var title = mutableStateOf("") private set on the view model, which was not getting updated, so used LiveData instead. When I use the debugger, it gets to LazyColumn and then stops, which means the children aren’t redrawn with the new data. The lazy column requires a key parameter to identify each item in the list. Screen. In view of the two solutions above being non-ideal, I’m Nov 7, 2021 · 1- LazyColumn this will create vertical list. id }) { article ->. Jul 27, 2022 · But tits not rflecting in the screen on real time, but when its scrolled it gets recomposed and it gets reflected. You should use ViewModel in which you should read your database and have a property to hold your list. If you want to a dd a header before the list of items please add a header as a separate item() before the main items() inside the LazyColumn scope. in any case if this fails you can use list. height(80. firstVisibleItemIndex property (obtained via rememberLazyListState and set as the state parameter to LazyColumn) and set the current tab based on that. If I use remember/rememberSaveable (timelinePosition), its lazyState. Sep 6, 2021 · 4. Text(text = article. If you do this, you do a backward write. – CommonsWare. mov Oct 22, 2022 · Text(text = item. I have also read the documentation about Jetpack Compose state and ViewModels here. My ChatViewModel. postValue(employeeDao. The chat messages are shown using the LazyColumn. android; grid; Community Products Roadmap Update, July 2024. It might happen in your case that while you navigate to the next screen and then come back, the Composable resubscribes to the Flow, and while that happens, the Flow is reset to the initial value for a moment. Also its a good practice to expose an immutable list ( list ) instead of a mutableList to the composable. var count by remember { mutableStateOf(0) } // Causes recomposition on click. . fun OptionsDetailsList(answerRevealed: Boolean, lstOptions: List<CertAnswers>) {. plus(listOf()) does not produce a different instance and the ViewModel doesn't republish the value because it is == to the previous value. Oct 10, 2022 · 2. Magenta) ) {. I did some digging in the source code, but it appears not to be easily and nicely possible to change/override this behavior. A user can click ‘Like’ button on different items in list and we’ve to update our list for each item correctly as per the result obtained. In short, every time the function is called, it'll behave like Modifier is changed and it'll cause recompositions. For example, you can store it in a mutable state list, as shown here: val counters = remember { names. In my particular case, I'm updating a single field (quantity) in a single item in the list. . 21. you can do that by fixing a height for that column. Optimizing Lazy List in Jetpack Compose. Bug: 240300611 Test: LazyColumnTest#listCanBeUpdated_{RemoteViewsService,RemoteCollectionItems}, GlanceAppWidgetReceiverTest#rootViewIdIsNotReservedId Jun 13, 2023 · However, when I call refresh() on the PagingSource associated with LazyPagingItems, the entire LazyColumn refreshes, causing the UI to visibly reload and scroll back to the top. addTimer() } Oct 5, 2023 · if you need a change item position or update value in list and you want to recomposition in LazyColumn, you have to add key. Also test that LazyColumn/ListView can receive multiple updates successfully with both RemoteViewsService and RemoteCollectionItems. Mar 19, 2021 · lastDataIndex - state. PreventUserInput to prevent scrolling, and then use a do-nothing scroll at the same priority to cancel the first Feb 15, 2022 · I tried using LazyVerticalGrid this way, but it does not render a list, while LazyColumn renders it. Use derivedStateOf to limit recompositions. If the user is seeing the previous message (scrolled to upper Mar 6, 2023 · 3. Snippet of my Dec 14, 2023 · I am seeking guidance on maintaining the user's current scrolled position within the LazyColumn when updating an item's. May 31, 2023 · The first reason is that you are using items without a key. getAllRows(). I am developing an android chatting app using jetpack compose. You tell Compose "this is what the list should contain now", and Compose handles it from there. Feb 10, 2022 · You must collect your FlowList as follows. Furthermore, is the user scrolls back up, previously visable data is no longer displayed. Because of recomposition, sometimes this index increases when it should not increase. size - 1. val list = viewModel. The list screen is designed by using jetpack compose and the list of items is shown in a Lazy column. I assume this has something to do with the data being lost during Mar 14, 2024 · Update: I found whats causing the auto scrolling issue its reverseLayout = true, because items are getting updated at bottom, the layout has to move up when items changes. Compose provides a set of components which only compose and lay out items which are visible in the component’s viewport. spacedBy(12. edited Mar 19, 2021 at 17:09. items. Anyway, when the problem approached for the 2nd time - the solution was to upgrade compose. Make sure that you are using the correct State composable and updating the state properly when the data changes. Nevertheless, even though only one item has changed, even the others get recomposed. Alternatively, you can download the repository as a zip file, unzip it, and open it in Android Studio. private val _messages: MutableLiveData<MutableList<String>> = MutableLiveData(mutableListOf("")) val messages: LiveData<MutableList<String>> get() = _messages. I looked in the documentation and there it says this, but I don't understand it: Apr 16, 2022 · Items come with a key parameter that you can use to prevent any duplicates and also to ensure that if there is an update the right item is updated. In other words, Compose will be notified if the list changes such as when items are changed, inserted, or deleted, not when the instances, such as the BilledProducts, are changed. After the user is happy with their selection, I will gather the information for selected checkboxes and save those specialties in the user's profile. However, this can cause issues if the data set changes, since items which change position effectively lose any remembered state. But that's a very simple example and does not cover the use case below. However, we Mar 12, 2021 · The code sample is a bit longer, but simple - it has a hardcoded list of Coin objects that are set as items (indexed) of a LazyColumn. LazyColumn(modifier = Modifier. These components include Jun 10, 2021 · When the app loads, the data for the first few users is displayed correctly, however, as the user scrolls down, and more users are made visable, the data does not always display in the UI. We create the state for our list by using mutableStateListOf<AppItem> () and also creates an immutable state of this list as itemsState. firstVisibleItemIndex == state. launch(Dispatchers. compose. I don't know why it's not working. Also, I think your code should have actually worked fine even without these modifications if the items were being rendered as per the updated list, but the problem (I am about 2/3 Feb 25, 2024 · It feels like you expect hiltViewModel() to return the same CarViewModel instance, but it's not going to happen - by default view model lifecycle is bind to current navigation route, and hiltViewModel() calls made from different navigation routes returns different objects. Oct 25, 2021 · create a mutable state list (initialization with data not shown here) provide the event handler that increases the stock, if the user taps an ingredient card class StorageViewModel : ViewModel() { var storageItems = mutableStateListOf<StorageItem>() private set fun purchaseIngredient(storageItem: StorageItem) { storageItem. Nov 27, 2020 · Edit March 2022. The state is created once, isExpanded is used as the initial value, but then it's only updated inside of the onClick, not when the argument is changed. Recording. contentPadding = PaddingValues(12. fun getAllEmployees() { coroutineScope. Oct 15, 2021 · This is expected behavior, and you should not expect this value to persist. value!!. If the user is seeing the latest message when new messages come, the LazyColumn should be scroll to the latest message. 2- LazyRow this will create horizontal list. private val itemList = (0. In order for list item operations to be more optimized you need to use a unique key. I can show the items or this OtherLayout that has a button at bottom, like a retry button. stock += 1 } } Dec 10, 2022 · Avoid backward writes. fun BadComposable() {. So far, the data in the MutableList changes according to the dragged item, but the changes in the order of the data are not triggered, so in the UI not being updated Jun 27, 2022 · Now this is a single action on the list. Composable is added through XML in fragment. Column(verticalArrangement = Arrangement. dp), verticalArrangement = Arrangement. Sep 29, 2022 · To show all records from your DB to lazyColumn, call getAll() method from your DAO class to respository class. sumDao. dp) ) {. Jun 21, 2024 · Use lazy layout keys. But, don't know why this is not happening when scrolled to other items other than bottom last item. You don't need to keep it in the activity, you just need to move it out of the LazyColumn. One has to manually update the original list item upon change. Basically, we create a never-ending fake scroll at MutatePriority. Using MutableStateList in ViewModel. UPDATE 2: I show some items according to some conditions, so I was increasing the stickyHeaderIndex within these conditions. And the messages are coming from the WebSocket. p. May 25, 2021 · 7. Aug 2, 2022 · Logs and experiments show that it indeed does: viewModel collects new list, then lazyColumn observes new list and use items syntax to create composable items, and the deleted item is removed from UI visibly. foundation. Jun 22, 2024 · As the name suggests, the difference between LazyColumn and LazyRow is the orientation in which they lay out their items and scroll. My question is, how can we update the visual state of the item without the need for Nov 16, 2022 · I've a list of QA(String,String) where each list item represents 2 TextFields in Lazycolumn, I tried several things but my TextFields value is not updating. Finally in init block we add our list objects into our mutable state. Follow best practices to optimize your app on Compose. In LazyColumn, handling click events is straightforward. This is because Kotlin will only allocate a new list if one of the operants of a list expression not equivalent to the result. Jun 19, 2021 · Use SnapshotStateList, the list is mutable. fillMaxSize()) {. hasApplied) attendanceStates. So UI reacts to changes in UIState. var favourites by mutableStateOf(listOf<FavoriteItem>()) then add/remove/update the list by using :-. Feb 3, 2024 · val messages: SnapshotStateList<Message> = mutableStateListOf() ) @HiltViewModel class SomeViewModel @Inject constructor( // Messages repository exposes messages for each channel as MutableStateFlows, and handles adding, removing, and updating messages as necessary inside itself. layoutInfo. 1. IO) { allEmployees. visibleItemsInfo. @Composable fun Dec 25, 2023 · Nico Molon. Perfectly your item have an id, but also you can build the key depending on any other item properties. xbxybsojqwbbgiukapwh