All Questions
Tagged with android-jetpack kotlin-coroutines
35
questions
2
votes
1
answer
402
views
How to load content into a LazyColumn asynchronously (Jetpack Compose)?
In my Jetpack Compose Android application I'm trying to load content asynchronously into a LazyColumn. I see the titles of the movies displayed in the console (see println in the ...
- 21
1
vote
1
answer
173
views
Kotlin throws NullPointerException, pointing not to code but to funcion name, when reading data with Datastore and Gson
In my mobile app, written with Kotlin and Android Jetpack Compose, I am saving some user data from web service to DataStore. For user data I have UserModel data class, it's content is not important ...
- 120
0
votes
2
answers
460
views
Change Background color of SnackBar in LaunchedEffect (Jetpack Compose)
I am trying to pass message from viewModel into my Screen Activity using collect in Android Jetpack compose, where I am trying to show snackbar but for some reason it is not changing background color ...
- 1,046
0
votes
0
answers
23
views
Strange behaviour observed in suspend-wrapped callback
I've created the following to wrap the callback convention found in the Stripe Kotlin/Java SDK:
suspend fun Terminal.discoverReaders(stripeTerminalConfiguration: DiscoveryConfiguration): List<...
- 7,352
0
votes
3
answers
3k
views
How to wait to finish task in kotlin
I have a function like this
internal fun handleResponse(items: List<TestItem>? = null) {
viewModelScope.launch(Dispatchers.IO) {
val isDataReturned = testItems != null
if (...
- 6,129
0
votes
2
answers
2k
views
Android kotlin flows collects initial values when visible
I was trying out different kinds of flows like flows with channel, sharedflows and stateflows. What I did was, suppose I have a MainActivity, inside it I have two buttons side by side at the top and ...
- 400
0
votes
0
answers
197
views
Pagin v3 - loses state when clicking on list item and come back - jetpack compose
I am displaying a paginated list using paging library in a lazy column in a bottom nav bar with 4 tabs say HomeScreen.
When its item is clicked it will to next activity with normal intent . But when i ...
- 547
0
votes
0
answers
160
views
Single vs multiple ViewModels in Android Jetpack
I have this situation where view renders data from Android ViewModel(s) but functionally they are distinct. One could be showing, say, some financial data and the other one sports-related.
One ...
- 3,068
0
votes
1
answer
790
views
Using Jetpack WindowManager to calculate screen size on Android
As Display methods are deprecated in Android 12, I am planning to use Jetpack's backward compatible WindowManager library succeeding Display.
However I am not sure whether I face an issue if I ...
- 1,662
1
vote
2
answers
3k
views
Koltin Flow flatMapLatest to combineTransform Using Multiple StateFlows
I have the below working code which uses a dropdown to update the satusFilterFlow to allow for the filtering of characters through the getCharacterList call. The getCharacterList call uses the jetpack ...
- 14.6k
0
votes
1
answer
284
views
How to use Repository data in two different fragments
I have FragmentA and FragmentAViewModel. FragmentAViewModel calls RepositoryA for getContactData(), which is a silent call without blocking the UI.
Now User Navigate to FragmentB which has ...
- 171
6
votes
2
answers
1k
views
replace GlobalScope.launch in jetpack compose
I am writing some pager code in jetpack compose and came to a situation where I need to change page number by button click. This is my event on button click:
onClick = {pagerState.scrollToPage(page=...
- 1,277
2
votes
1
answer
525
views
"@Composable invocations can only happen from the context of a @Composable function"
@Composable
fun CategorySection(context: Context) {
Column(modifier = Modifier.padding(8.dp)) {
Text(
text = "Api Data",
style = MaterialTheme.typography....
1
vote
1
answer
852
views
view doesn't get recomposes when mutable list changes
I have an application that has a statelist in the viewmodel. and i have function that adds a number in the list. when i click on a button, it adds the number in the list. but the changes is not ...
- 165
7
votes
3
answers
6k
views
How to handle Kotlin Jetpack Paging 3 exceptions?
I am new to kotlin and jetpack, I am requested to handle errors (exceptions) coming from the PagingData, I am not allowed to use Flow, I am only allowed to use LiveData.
This is the Repository:
...
- 69