How do I use ListView to display data from a Firebase database in Kotlin? How can I fetch data from a Firebase database and display it in a ListView? TextView works just fine but when I use ListView, I get errors in the text highlighted in bold below namely; append and setText. I've got to say that I'm new to Kotlin and Java. val viewTaskss = findViewById(R.id.taskListview) viewTaskss.**setText(**"") if(snapshot.exists()){ for(oneRecord in snapshot.children){ viewTasks.**append**("${oneRecord.child("task").getValue(String::class.java)}")...

Android Kotlin - after animation: reset position and then repeat I'm making a swipe animation: anim = swipe.animate().rotationBy((-30).toFloat()).setDuration(1000) // SWIPE TO LEFT .translationX((-distance).toFloat()) .setInterpolator(AccelerateDecelerateInterpolator()) anim!!.setListener(object : Animator.AnimatorListener { override fun onAnimationRepeat(animation: Animator?) {} override fun onAnimationCancel(animation: Animator?) {} override fun onAnimationStart(animation: Animator?) {} override...

Onactivityresult not working and startactivityforresult closing current activity and opening previous activity after picking the file This is the whole code of that activity. I am putting the whole code in case any other thing is creating any problem in this activity. As i think there is nothing which can create a problem i am starting activityforresult on button click named send_document, infact on any button i tried to pick any file file picker opens but onactivity result never works even i tried to print a toast for testing and to ensure that onactivity result works or not but that toast is never printed and this...

Why do tests fail when executed as a class? I have a series of tests separated into classes. The tests run properly when run individually or when run as a whole package. Most classes also run properly when executed as a class, but there is one class that fails to execute with the following error: java.lang.RuntimeException: Delegate runner 'org.robolectric.RobolectricTestRunner' for AndroidJUnit4 could not be loaded. at androidx.test.ext.junit.runners.AndroidJUnit4.throwInitializationError(AndroidJUnit4.java:92) at...

I want to create this project any suggestions [closed] I want to create this project in android i am facing trouble to creating this type of layout any one have any suggestions related this project thank you in advance

Gradle generated source code not available for use I am generating client code using Openapi's gradle plugin. The project builds correctly and runs, but I cannot use the generated code in my other classes (it does not pick up the generated dependencies). I think this has something to do with Gradle building the project after doing the compile but I am not familiar with Gradle. My build.gradle.kts is: import org.jetbrains.kotlin.gradle.tasks.KotlinCompile plugins { id("org.springframework.boot") version "2.4.0"...

getWorkInfosByTagLiveData not triggered I'm having a problem, I can't seem to figure out why my code has stopped working. I have a scheduler that has 2 functions, one for scheduling a work, and the other one returns a livedata for the works currently running. I schedule my work like this (I cut the last part as it is not relevant for the problem) : workManager.enqueueUniqueWork( "$fanfictionId-$chapterId", ExistingWorkPolicy.KEEP, OneTimeWorkRequest.Builder(DownloaderWorker::class.java) .addTag(fanfictionId) I...

Android Mainactivity extension to java The mainactivity is in kotlin MainActivity.kt Is there any way to convert it to java?

SceneForm sceneview always black in fragment I am trying to render a 3d model on sceneview but i am getting black screen no matter what i do . what i am trying to do is to load a 3d model like in ARFragment but with more sceneview like features. here is the code for my layout and this is my fragment class ThreeDView : Fragment(R.layout.sceneview_fragment) { lateinit var model: ModelRenderable lateinit var link: String lateinit var binding: SceneviewFragmentBinding lateinit var mScene: Scene lateinit var...

Spring JPA Hibernate, how to update automatic @ManyToOne value object already referenced on DB? I'm principant on Spring, I want to create my ClientServeur for my app android. My Beans: @Entity data class Aliment( @Id @GeneratedValue(strategy = GenerationType.AUTO) val numAliment: Long, val nomFrAliment: String, val nomAnAliment: String, val numGenre: Float, @ManyToOne @JoinColumn(name = "num_genre") val genre : Genre ) { constructor() : this(0, "inconnu", "inconnu", 0f, Genre()) { } } @Entity data class Genre( @Id...

How can I add space after 4 character in EditText at Kotlin? I'm try to make EditText for bank cards. I need to add space after every 4 number. I already tried another answers at stackoverflow but non of them working for me. I try to make it from count (I use textwatcher) but I can't do it. Other answers use insert method for add space but insert method isn't available. When I write insert it become red so I want to ask for learn. How can I make it? I tried something but I really not know what I'm doing. I really need advices. Here my editText...

Is there a possible way to have Compass on Google Maps App on Android Studio? So I have some stumbling thing right now and that is to set up a compass, it can be a simple one, it doesn't matter the design. I am wondering should I have to make a new layout for the compass and implement it on the main map activity or there is a way that has something to do with the Google Map API in Android Studio, currently I am making it with Kotlin, I know that Java is more efficient which I am working on it, but I am interested what type of possibilities it can be made and what type...

download pdf from server using retrofit i have a problem with download pdf file from server, i found function which converte byte array private fun InputStream.saveToFile(file: String) = use { input -> File(file).outputStream().use { output -> input.copyTo(output) } } if i using this fun i have exeption E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.securityenginee, PID: 4154 java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at...

Kotlin Native app with Ktor curl client fails to execute I'm facing an issue with the Kotlin Native + Ktor curl client. This is what I'm getting on an attempt to run the executable: Process 'command 'C:\...\build\bin\native\releaseExecutable\app.exe'' finished with exit value -1073741515 (state: FAILED) Previously, I wasn't able to get the executable at all. So I went to ktor-client-curl repo and looked into their <a href="https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-curl/build.gradle.kts" rel="nofollow...

change image view while pressing button in kotlin [closed] I want to change image view while pressing button after pressing end return to normal mode in kotlin how can I do ?

Navigation routes not works in jetpack compose Started new (pet) project with compose and faced a problem with navigation: I wanted to use official navigation-compose and tried it's example from here But navController.navigate() ask for Uri now, not string. Using Uri.parse(my route string) compiles but results crash when click to action button. Code: package example.test import android.os.Bundle import...

Kotlin: JSON Schema type "number" gets converted to String when using JSONObject(String) I implemented a function to validate a given JSONObject against a given JSON Schema JSONObject. Here is the code: class JsonSchemaUtilsTest { //a JSON as a String val testJsonStr : String = """ { "duration": 28298080890890809809 } """.trimIndent() //The JSON schema as a String val testJsonSchemaStr : String = """ { "${'$'}schema":...

Firebase storage upload progress with kotlin flow I'm having a hard time dealing with Firebase storage upload progress and Kotlin flow, basically what I'm trying to do is emitting the progress of the upload in addition to the usual "loading", "success" and "error" state suspend fun firebaseUpload( uploadFile: UploadFile ): Flow = flow { emit(DataState.Loading()) //uploading file val file = Uri.fromFile(uploadFile.file) val ref =...

Kotlin measureTime differs from kotlinx-benchmark (jmh) by far I'm testing with the following class (You can find a git repository here): @ExperimentalStdlibApi @State(Scope.Benchmark) class TestBenchmark { private fun benchmark() : List { return buildList { addAll(0..100) shuffle() sortDescending() } } final fun measureTime() { val result: Any? val time = measureNanoTime {...

How to navigate to a certain destination with deeplinking NavigationComponents I have this use case, I have been using an Activity to navigate from any of my fragments to that Activity, the thing is that now I have included that activity to the main nav graph all my other fragments depend on, so now I need to link every destination in my app with this new destination in order to navigate from every fragment. This is tedious since I have lots of fragmnents and doing the actions from each one of them will result in a lot of work that maybe can break the app. My idea is to...

How can I compare addresses with eq operator I'm using Mongo with Kotlin and I'm looking to compare an address category. In this case, I have three addresses MAIN, DELIVERY & BILLING So, if an address is MAIN I want to compare it with the AddressCategory.MAIN, if not with another address category and so on ... I'm quite a beginner in Kotlin, I tried to use the logical and ternary operators to make this comparison, but I couldn't. eq(Address::category, AddressCategory.MAIN.toString()) , eq(Address::category,...

How to receive Multipart Form Data in GET Call Retrofit Android Kotlin I am POSTING my data which has a string and a file to the backend using retrofit Multipart to my spring boot backend. It is working properly and it's storing the data in my tables. I want to retrieve the data from DB and I have created an API in spring boot to send Multipart data but I am unable to find a way to parse the multipart data in retrofit GET API. For my project, I need to create a user profile so for that, I need to send user data and his profile picture. Currently, I am using...

Why Android Studio debugger doesn't stop on code that is called inside runOnUiThread I found this bug on with the following code: (it.context.get() as? Activity)?.runOnUiThread(Runnable { it.weakRefIOnDataRefreshed.get()?.onDataRefreshed(refreshedItemList) }) The code above is inside a run method that runs in a non UI Thread. I want to call a method in fragment with the refreshedItemList as argument. I want to debug the onDataRefreshed method (which is inside a Fragment), and I'm putting inside this function a break point but nothing happens. I also put...

How do I query a user's info in Firestore if all my document IDs are auto-generated? All of the examples I'm finding online have very simple document IDs, but what do you do if you're auto-generating all your IDs (as the docs say you should)? For example, I want to query the date when the user was created. The document ID for this is below, but I've just copy-pasted it from the Firestore console. How would I know the document ID so that I may query any user's info? Note that I will be have a users, groups, usergroups, etc... There will be quite a few collections, each using...

pdf creation on Android: what is the difference between PdfDocument and PdfPrintedDocument I want to create a pdf file in my Android app. What is the difference between these two classes ? https://developer.android.com/reference/android/graphics/pdf/PdfDocument https://developer.android.com/reference/android/print/pdf/PrintedPdfDocument.html Thanks !

Android: Should Java and Kotlin have the same versions if used in the same project? I have an old Java android project which uses Java6 compiler that I want to extend , but I like new "parts" to be written in Kotlin(I have no xp in Kotlin). So, basically since Java code emits Java 6 compatible byte code should I configure my Kotlin compiler to emit Java6 compatible byte code as well? So, I mean in general should there be a match between Java and Kotlin versions? Because in my imagination JVM cannot execute(at least cannot execute correctly) program which parts are compiled...

Android Kotlin - Animation translationX ignores the distance I'm using this code to make a swipe left animation: swipe.animate().rotationBy(-30f).setDuration(1400) .translationX(-distance) .setInterpolator(AccelerateDecelerateInterpolator()) .start() and then I just try to reset the position / swipe back with: swipe.animate().rotationBy(30f).setDuration(1000) .translationX(distance) .setInterpolator(AccelerateDecelerateInterpolator()) .start() but then the View goes to the right side until it's off the screen which means it...

Build failed with an exception error in Kotlin Got this error after updating my Kotlin plugin on android studio. package com.example.test fun main(args: Array) { println("Hello world") } This is the error I receive: * Where: Initialization script '/private/var/folders/bn/st769wd16nv1d5_wccw8_tm00000gn/T/Test_main__2.gradle' line: 27 * What went wrong: A problem occurred configuring project ': app'.

Could not create task 'appTest.main()'.

> SourceSet with name 'main' not found. When I run a stack trace, this is the response...

Replace element in ArrayList of objects [Kotlin] I know I can replace an element inside an ArrayList list.set(index, "new string") But let's say I have an ArrayList with objects. list.set(index,(myObject("Hello", "world"))) How can I replace "Hello" or "World" in that object within the ArrayList? If there is another data structure that I can to use to achieve this, then it would be appreciated as well.

How a function that return an Int can be part of if statement? I have define a new function (please don't refer to the logic, only if it is necessary): operator fun Int?.compareTo(other: Int): Int { if (this == null) return -1 if (this > other) return 1 else return 0 } now in an if statment i'm writing: val x:Int? =8 if(... && .... && ...&& x > 5) I see that the x>5 runs the function I wrote above (compare), but this function doesn't return a Boolean, it returns an...