Shared lazy coroutine / memoized coroutine execution Context: import kotlinx.coroutines.CoroutineStart import kotlinx.coroutines.async import kotlinx.coroutines.coroutineScope data class DatabaseData( val a: String, val b: String ) interface DatabaseFetcher { suspend fun get(): DatabaseData } class MyClass( private val databaseFetcher: DatabaseFetcher ) { suspend fun a() = coroutineScope { val a = async(start = CoroutineStart.LAZY) { databaseFetcher.get().a } //imagine more async{}'s here a...

How to change Locale in android app - Kotlin and jetpack compose I was trying to change the language of my application (Kotlin & Jetpack Compose) but couldn't get it to work LocaleHelper.kt fun setLocale(context: Context, language: String): Context { persist(context, language) if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { return updateResources(context, language) } return updateResourcesLegacy(context, language) } @TargetApi(Build.VERSION_CODES.N) private fun updateResources(context: Context, language: String): Context...

Kotlin Filter list with multiple conditions - Return error or valid items I'm having a kotlin list of objects List<A> class A { type : enum (A_val, B_val, C_val) } I want to filter the list to find valid items and return Either error or valid items If type is A_val return error If type is B_val do some more check and if failed return error If C_val just return the items having C_val Old school way fun overTwenty(inputList: List): List { val filteredList = ArrayList() inputList.forEach { person -> if (person.age > 20) {...

Resilience4j - Can you use annotations like @Retry in a kotlin app without Spring Boot? I'm currently implementing retries and circuitbreakers using Resilience4j. Most of the examples online are using Spring Boot online and noticed that @Retry and @CircuitBreaker annotations are being used. However, I was wondering if a similar approach could be used for a kotlin app without Spring MVC or SpringBoot? Thanks!

onResume() being called after item is deleted in Database, causing LiveData.observe to be called again, refreshing the RecyclerView scroll position Background information: I am working on a pixel art editor app and the main screen displays the user's creations like so: To delete a creation, the user long taps on it, they get a dialog asking them whether they want to delete it, and if they want to they press 'OK'. Adapter: package com.therealbluepandabear.pixapencil.adapters import android.graphics.Bitmap import android.text.TextUtils import...

how can i listen to click event in Snackbar in kotlin I have a snackbar and I showing information to users. If user click Snackbar, I want to open an other fragment. private fun showLastUnsuccessfulLoginMessage(message: String) { val snackbar = Snackbar.make(view!!, message , Snackbar.LENGTH_INDEFINITE) snackbar.view.setSafeOnClickListener { Log.wtf("clicked","setSafeOnClickListenerClicked") } snackbar.view.z=200f snackbar.view.translationZ=200f...

A safest way to replace an important file: copyTo vs rename vs... in Java/Kotlin My app needs to update(replace) a very important file A from a pending one P. There are several ways to do it, such as: Remove A and Rename P to A CopyTo A with overwrite option ... Is there a way that is less error-prone in several situations,...

NullPointerException Crash within Lottie for Android I have an annoying NullPointerException when using Lottie for Android for a handful of devices. The crash is in Lottie. I think it is missing a null check. I cannot reproduce this crash, as it happens very rarely. Is there any way I can avoid this crash: Fatal Exception: java.lang.NullPointerException Attempt to invoke virtual method 'void com.airbnb.lottie.animation.keyframe.BaseKeyframeAnimation.setProgress(float)' on a null object reference...

How to add image URL from storage to realtime database in android kotlin I'm trying to upload image reference to realtime database from storage but I'm getting an error as: "Object does not exist at location". This is the code for uploading images to storage as well as database private fun uploadImageToDatabase() { storageReference.child("images" + UUID.randomUUID().toString()).putFile(filePath) .addOnSuccessListener { storageReference.downloadUrl.addOnSuccessListener {...

Spring Integration - Dispatcher has no subscribers for channel 'unknown.channel.name` using Kotlin DSL I'm starting off looking at Spring Integration, using the Kotlin DSL. I have a simple flow - I send a message to one channel, it calls a fake service, and then routes the message based on the result to one of two other channels. The error I am getting when starting the application is this. I don't really understand this, as I haven't explicitly defined a channel called "unknown.channel.name" Caused by: org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for...

Empty json response I'm fetching data from API. I get the json response normally when I use the browser. But it's empty when I use retrofit. This this the api interface: interface FootballApi { @GET(".") suspend fun getAllMatches( @Query("action") action:String = "get_events", @Query("match_live") match_live:String = "1", @Query("APIkey") apiKey:String = API_KEY ):Response } This is the path which I use it to get the json response from browser: <a...

Adding document İD to firebase document as a field I have a model with default values. My app gets the data from user through EditTexts and add them to Firebase Firestore. I hava an addData function (in AddAnalyzeActivity) and savefunction (in AddAnalyzeViewModel) for this operation. I'm getting EditText entries in AddAnalyzeActivity and adding them to my model but on this step ı want to add document id to my model but I can't access the documentIds properly in AddAnalyzeActivity. I can only access them with a forEach method when I try to...

Bottom nav bar with curved edge and shadow- Jetpack Compose I am trying to build a bottom nav bar with curved edges at top start and top end.But when setting a shadow it is not showing the shadow . How to set a shadow around? Or am i doing any wrong thing. This is my code BottomNavigation( backgroundColor = Color(0xffffff), modifier = Modifier .graphicsLayer { clip = true shape = RoundedCornerShape(topStart = 30.dp, topEnd = 30.dp) shadowElevation = 2.2f }...

ExternalSyntheticLambda1 Leak Canary I'm using LeakCanary to detect leaks in the app I'm working on. And I have no idea where this one comes from. What might ExternalSyntheticLambda1 refer to? I used binding first, and I decided to remove that, since SwipeRefreshLayout leaked. It looks like removing the binding and going old school worked, however now I get a new error that I don't understand. Help? Thanks ┬─── │ GC Root: Input or output parameters in native code │ ├─ dalvik.system.PathClassLoader instance │ Leaking: NO...

How to Call Fast API in kotlin Andriod Studio I'm working on a project where I created an API where I can get trends from twitter based on user's entered location. Now I want to call that API in android. It looks like: I want to show the GET Trends here: Get Trends Layout: I need your help to tell me...

Jetpack Compose: nested LazyColumn / LazyRow I've read through similar topics but I couldn't find satisfactory result: What is the equivalent of NestedScrollView + RecyclerView or Nested RecyclerView (Recycler inside another recycler) in Jetpack compose <a href="https://stackoverflow.com/questions/67919707/jetpack-compose-how-to-put-a-lazyverticalgrid-inside-a-scrollable-column">Jetpack Compose: How to...

Get wrong value from int* to JintArray in jni I have a c function int* GenerateIntArray() it will generate a int array like [0,8,28,108,0,3] in my jni layer : fun getIntArrayFromJNI:JIntArray I do this for get Int* from C Lib jintArray rtn = env->NewIntArray(6); int *temp = C_GetINTArrayData(); env->SetIntArrayRegion(rtn, 0, 6, temp); return rtn; and convert it to IntArray but in Android Layer: fun getIntArrInAndroid():IntArray var result=getIntArrayFromJNI() I check the data list it show [-214587424,119,0,0,205189680,-1275068295] is...

Best way to find multiple items in single list kotlin What is the best approach to find three items in single list. I tried some code and working fine. I want to know is there any better approach for efficient, memory management or anything which is good. val completeEvent = events?.lastOrNull { events -> events.status == "complete" } val activeEvent = events?.find { events -> events.status == "active" } val futureEvent = events?.firstOrNull { events -> events.status == "future" } ApiResponse "Events": [{ "title": "Test 1",...

Design issues when adding Navigation Driver, Android, Kotlin I wanted to make a side menu for my android application. To do this, in MainActivity, I changed the root layout element from ConstraintLayout to DrawerLayout, added my own toolbar, and then wrote the side menu code. But when I started testing the app on my phone, the elements of my start fragment(fragment_start) moved to the right. I sat all day, but did not understand what was the mistake, where did I screw up? And there are a couple of questions in connection with this: Why is the hamburger...

I don't know the following syntax: (new Function1((Continuation)null) I am learning for coroutine of Kotlin. I want to understand principal of coroutine on jvm. This is my toy-problem and decompiled-code as java class Toy { val foo: suspend () -> Unit = { withContext(Dispatchers.IO) { println("Foo!") } } val bob: suspend () -> Unit = { println("Bob!") } val boo: () -> Unit = { println("Boo!") } } public final class Toy { @NotNull private final Function1 foo = (Function1)(new...

Kotlin, text does not appear on buttons i got two buttons in android app layout(kotlin language). The problem is that text does not appear on the button, like on the screenshot. What can i do to fix this? I can't find anything about this problem on the internet.

Android. How to find out when Google pay payment is not success and there is not enough money on the card? I try to pay when I don't have enough money on my card and then I get result code OK and payment is successful but that's not true. How to handle and find out when there is not enough money to pay or, for instantce, Internet payment limit exceeded? Like where exactly to get information that will show that the payment was not completed successfully? My code: private val gPayLauncher = registerForActivityResult(ActivityResultContracts.StartIntentSenderForResult()) { result -> when...

How To Use Material Time Picker Dialog In Android Kotlin? val mTimePicker = MaterialTimePicker.Builder() .setTimeFormat(clockFormat) .setHour(12) .setMinute(0) .setTitleText("Set Time") .build() I use the Material Time Picker Library.

How can I refresh my composable when new data is being inserted? My team and I have to make a license plate scanning app as a school project. With that, we have comments and pictures which can be added to cargo. Whenever the user scans a plate they also get the chance to change the checked info in case of a mistake. The problem is that whenever we delete data from the scanned plate it doesn't show on the screen that it has been deleted until we go to another screen. The same goes for the lazy column which we use for inserting new instances of comments and...

Synchronising attrs.xml enum and kotlin enum class So, in my attrs.xml i have an enum attribute like this: ... then in my custom view class I have this property which I set in the constructor with the attribute's value. The int value that the attribute gives is converted to an enum class value, which I can then use in the rest of the view's code: enum class Direction(val value: Int) { HORIZONTAL(0), VERTICAL(1), BOTH(2); companion object {...

How to Copy Image from Our Android App and Past that Image in Our Android App through EditText I want to add Copy Paste Image Functionality in my Android App Like IOS. Where I Copy Image from My Android App and Paste that Image in My Same Android App through EditText (just like IOS Whatsapp) Is it Possible in Android? Thanks in Advance

How to implement nested paging in android kotlin? I have a recyclerview , for i using pagin 3 with coroutine live data . but child recyclerview also have paginate data so how can i perform this nested pagination in android kotlin.

Why do I get 'Suspension functions can be called only within coroutine body' if I don't add apply {} Could someone please explain why I get a build error Suspension functions can be called only within coroutine body for ::anotherSuspenseFunction in following snippet suspend fun anotherSuspenseFunction() = Response.success(BaseResultDataModel()) suspend fun example(scope: CoroutineScope, journeyDataModel: JourneyDataModel) { submit(scope) { responseHandler.call(scope, ::anotherSuspenseFunction, { BaseResultDataModel() },...

android studio mcpack ,mcworld How to apply Minecraft We are creating an app that opens Minecraft when you select Minecraft files. Minecraft opens, but fails to load the file. There is no problem with the file size or path, how can I hand it over to Minecraft? It doesn't matter if it's Java or Kotlin, so please reply. cursor?.use { if (it.moveToFirst()) { val displayName: String =...

Android AppWidget - sometimes the onDataSetChanged() method doesn't get called I noticed strange behavior of the widget in my app. Sometimes the onDataSetChanged() method from RemoteViewsFactory class is not called (of course when the app is in the background and widget is visible) even though the notifyAppWidgetViewDataChanged() from AppWidgetManager class works correctly. I don't see any specific situation where this is happening - just sometimes it works, sometimes it doesn't. I spent a lot of time on debugging - everything looks like it's working fine....