Android Paging Compose: How to scroll to top when any of the queries changed? I have a list of products. On the ProductsScreen I have some filter options, search box, also filter chips : I'm using paging 3 library for the pagination. I want to scroll to the top when the search query or selected filter chip has changed. Here is my code : ProductScreen @Composable fun ProductsScreen( modifier: Modifier = Modifier, navController: NavController, viewModel:...

How to get the first day of a month I am trying to get the first day of a month, when I pass July 2022, I want to get 1st July 2022 midnight. This is what I tried fun String.firstDayOfMonth(monthYearString: String, timeZoneId: ZoneId): LocalDate? { var firstDayOfMonth: LocalDate? = null try { val dateFormatterMonthAndYear: DateTimeFormatter = DateTimeFormatter.ofPattern("MMM yyyy") val yearMonth = YearMonth.parse(monthYearString, dateFormatterMonthAndYear) //val localDateTime = LocalDateTime.parse(monthYearString,...

Reuse fragment UI logic with different inheritance I need advice on how reuse custom UI logic in different fragment with different inheritance. Let's me explain, for example i have 2 fragment with different inheritance but 70% of UI logic is common, so my qestion what is the best practices to do this. Now I just transferred the general UI logic to a separate class in which I pass view as a parameter

How to capture video from my foreground service android? I am writing a screen recording program like ZD soft Screen recorder For this, I need to record video in the foreground service so that I can record video from all applications (outside my application environment). How should I do this? I tried different ways but did not get an answer

How to refresh Google Maps fragment inside Fragment container after loading new route data I am creating a cycling app for my school project and I am stuck on the part for loading routes. I got everything to work except loading a specific route on my google maps fragment inside of fragment container view. If I change the fragments from history to home and after that back to history it draws a polyline on my map. How can I set to draw the polyline on data update without changing fragments. private fun chooseRoute(position: Int){...

Unable to use instagram's add to story intent I am currently trying to use Instagram's Sharing to Stories API according to this documentation So far, I have made a function that is called by a button press: private fun shareStory(){ // This code loads the Drawable from Resources: val resourceId = R.drawable.ayumu_1 val savedImageURI = with(resources) { Uri.Builder()...

Cannot run program file:/runtime.jar!/some_binary: error=2, No such file or directory (Kotlin) i am working on a kotlin project and in my task i have to execute binary from code using ProcessBuilder. i copied this binary to resources, tested my code and everything worked good locally. val url = ConversionTool::class.java.classLoader.getResource("my_binary_file_name") url!! //ensure that file exists, just for test val process = ProcessBuilder(url.path).start() But when i deploy this code to docker testing environment, i get following exception: java.io.IOException: Cannot run program...

Kotlin Reflection not working on custom classes I have this wonderful method here: fun Any.get(name : String) : Any{ println(name) println(this::class.members.first{it.name == name} as KProperty1) return (this::class.members.first { it.name == name } as KProperty1).get(this)!! } which I use with the class B: open class Model(@Sql("id",true,true) var id : Int = 0) open class A(val a : String, val b : User, @NoSql id : Int = 0) : Model(id) class B(val c : Int, @NoSql a : String, @NoSql b : User, @NoSql id : Int = 0) :...

Can I use object properties as a mutableState in kotlin compose? The code has been changed and reduced for this question! I have a class called "Game" and I want to show in compose the dices value. And I want to update the composable with the new value every time a new turn is started and when that turn ends. class Game (val board: Board, var player1: Player, var player2: Player) { var dices = Dices() } class Dices (var first: Int = 0, var second: Int = 0) { fun rollDices() { first = rollDice() //Returns a value between 1 and 6...

Why are trailing lamdas in Kotlin not carried out in this "repeat" function (from Google Tutorial)? To preface, I'm not a professional, nor a student. I have been self teaching Python and JavaScript for very basic quality of life improvements and I'm working my way through the Google Developers "Kotlin Fundamentals" for something different. However I've reached trailing lambdas and the "repeat function" and gotten a bit confused. Before using the repeat function, the tutorial code was functioning as expected: main() { val treatFunction = trickOrTreat(false) {"$it quarters"} val...

Polymorphic kotlinx serialization when type is integer, not string I am trying to consume and emit JSON which contains a polymorphic list of items. The problem is: the items contain type key with integer values (not strings). The API endpoint produces and expects JSON similar to this: { "startTime": "2022-07-27T133257.379Z", "items": [ { "type": 0, "results": "string", "restBetweenRounds": "string" }, { "type": 1, "results": "string", "setCount": 0, }, { "type": 2, "items": [...

Modifier.Scrollable in Android Jetpack Compose I want to achieve the following effect: Three sections - image, header, and text. When I scroll up, I want the image section to shrink until its gone, the two lower sections to move up and occupy the freed space, the header to become a sticky header at the top, and then the text scroll to kick in last. My first attempt was with placing Modifier.verticalScroll both in the overall container and the child text, have...

How to get epoch milis from a date (LocalDate) I have a month July 2022 for example, I want get epoch milis for the first day of the month 1st July 2022 at midnight. from the month I was able to get the 1st July 2022, but how to convert it into epoch milis for 1st July 22 midnight val datey = "July/2020" val dateFormaty = DateTimeFormatter.ofPattern("MMMM/yyyy") val yearMonthy = YearMonth.parse(datey, dateFormaty) val parsedDatey = yearMonthy.atDay(1) I get 2022-07-01 for parsedDate, I want to get the date time for this...

How to set the frame rate of the camera during preview without delay for android applications? When I used the API of Camera2 to set the frame rate of the camera preview, I found that there was a certain delay from the code running to the successful execution. Do you have a better method to adjust the frame rate of the preview without delay? My current method is like this, but from the actual operation effect, It takes a few hundred milliseconds from code running to successful execution. previewRequestBuilder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, FPS[15]) How do I need to...

Spring JPA Expecting Member Declaration for Derived Query I'm trying to add a derived query to my Spring application to return users from my SQL database with a matching email, but I've been running into the following error (sorry for the external link, this is my 1st Stack Overflow question): Here's my code for the files that I think could conceivably matter for this: repository.kt package com.companyname.productname.repository import...

Kotlin coroutine exception handling is different on Android compared to vanilla Kotlin I have a question about a difference in coroutine exception behaviour on Android compared to regular "vanilla" Kotlin code. The Kotlin coroutine exception handling guide here begins with an example that you can run in the Kotlin playground. There you get the same output that the guide predicts. @OptIn(DelicateCoroutinesApi::class) fun main() = runBlocking { val job = GlobalScope.launch { // root...

Replacing a string within a .class file on build with Gradle Kotlin I've got a Java application with the following variable: static final String MAGIC_VERSION = "SET_BY_MAGIC"; Using gradle, I want to replace this on runtime with my gradle project version, however I am having issues replacing the string. This is my gradle file: tasks { processResources { duplicatesStrategy = DuplicatesStrategy.INCLUDE from(sourceSets["main"].java) { filter { it.replace("SET_BY_MAGIC", version as String)...

Need explanation of the short Kotlin solution for strings in Codewars I got a task on code wars. The task is In this simple Kata your task is to create a function that turns a string into a Mexican Wave. You will be passed a string and you must return that string in an array where an uppercase letter is a person standing up. Rules are The input string will always be lower case but maybe empty. If the character in the string is whitespace then pass over it as if it was an empty seat Example wave("hello") => []string{"Hello", "hEllo", "heLlo", "helLo",...

Creating a ViewModel causes the app to crash. (Kotlin/Android Studio) I have been following a tutorial from Geeks for Geeks on how to make a simple note app for Android. I've practically copied to code word-by-word (except for a minor fix in the gradle file as advised from a Stack Overflow post and a comment in the YouTube comment section), yet the app crashes every time I open it even after clearing all the caches and rebuilding the project. Links: <a href="https://www.geeksforgeeks.org/how-to-build-a-simple-note-android-app-using-mvvm-and-room-database/"...

Menu does not appear in the actionbar(android studio kotlin) Hi guys I can't get my dropdown menu to show up in my action bar. In the menu.item.xml, the menu bar appears in the menu split view, however upon loading it on the emulator the menu disappears. I can't find any solutions in the existing forums on StackOverflow. Menu.item.xml Main activity implementation of the onOptionsItemSelected override fun onOptionsItemSelected(item: MenuItem): Boolean{ val navHostFragment =...

How to change dependencies version according to the SDK version My app was initially built using SDK 32 with the following dependencies in the module build.gradle: dependencies { implementation 'androidx.corecore ktx1.8.0' implementation 'androidx.appcompatappcompat1.4.2' implementation 'com.google.android.materialmaterial1.6.1' implementation 'androidx.constraintlayoutconstraintlayout2.1.4' implementation 'androidx.navigationnavigation fragment ktx2.5.0' implementation 'androidx.navigationnavigation ui ktx2.5.0'...

How to open a new activity from the RecyclerView detail page activity which comes from RecyclerView item with different parameters in Kotlin I have the basic wireframe layout, who describe my question, because i don't know how to explain with good typing. (but I'll try to explain as clearly as possible what I mean and as much as I can). *I hope you all can understand what my wireframe means :) *if you feel difficult to understand this, please tell me, I will make it better for more detail. so here from the wireframe, i have 3 activity. MainActivity, with...

android studio gradle plugin problems out of the box just installed android studio after getting a fresh install of win10. i created a new empety project and got this error: Gradle sync failed: Plugin [id: 'com.android.application', version: '7.2.1', apply: false] was not found in any of the following sources: this is the code: plugins { id 'com.android.application' version '7.2.1' apply false id 'com.android.library' version '7.2.1' apply false id 'org.jetbrains.kotlin.android' version '1.6.10' apply false }

How do I change binding on button click to different drawable icon I have a "save" option on my CardLayout, where a user can click "save" and it saves into another fragment. When clicking "save", it should change the drawable icon "heart" to another drawable. At the moment, I have successfully changed the text when clicking "save" (shown below), but I'm not sure how to change a drawable. binding.saves.setOnClickListener { val exist = dbHandler.getTask(task.id) if(exist) {...

Android Kotlin Coroutines - Call Api Every X Seconds on Background I've build clean architectured app (with mvvm, use cases, compose). I've a CoinListViewModel for list all crypto coins by using CoinPaprika API. It is like; @HiltViewModel class CoinListViewModel @Inject constructor( private val getCoinsUseCase: GetCoinsUseCase ) : ViewModel() { private val _state = mutableStateOf(CoinListState()) val state: State = _state init { getCoins() } private fun...

How to convert LocalDate to LocalDateTime in Kotlin Hi how can I convert LocalDate to LocalDateTime using org.threeten.bp I have a date 2022-July-27, which is LocalDate, how can I convert to LocalDateTime please Thanks R

Custom bottom navigation bar layout new I want to create the following customized BottomNavigationBar. How can I set custom layout for the same?

How does Kotlin handle null class objects? I was curious how does Kotlin handle nulls, more specifically, I mean: class aClass(val input : Int ){ val field = input } fun main() { val obj : aClass? = null if(obj?.field == null) { println("true returned") } } In this part of code the object obj of type aClass? is initiated as a null, and despite the field field was not initialized the if statement checking if field is equal to null returns true. I know in Java it would throw an error that field is not...

"Lateinit property `app` has not been initialized" Error after Hilt Migration I'm migrating our codebase from Dagger 2 to Hilt. I'm kind of a noob. I've gotten everything to build and compile. There is a crasher on app launch with this error: Logcat 2022-07-27 113126.297 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.appname.company, PID: 17599 java.lang.RuntimeException: Unable to create application com.appname.BaseApplication: kotlin.UninitializedPropertyAccessException: lateinit property app has not been initialized at...

Kotlin Language Development Wishlist Website I've been developing with Kotlin for a few months and I have several apps on Google Play. I have a fundamental and critical change I want to get to the Kotlin language development team for consideration. I'm sure this change also requires the language administration involvement as it also goes to the core of user experience with Android phones. In addition, I have been building a 'Wishlist' or request for changes in how coding is applied in development. I am usually successful in web...