Start activity from button.setOnClickListener which lies in my RecyclerView I want an activity/class to run on a Button click. The Button is inside my RecyclerView. I first had the code in my MainActivity with: btnComplete.setOnClickListener { startActivity(Intent(this@MainActivity, DelComplete::class.java))} This code was in my onCreate of my MainActivity. How ever on running the code I found the error: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void...

Material 3 Navigation Drawer not highlighting item for current fragment So, I'm migrating to Material 3 right now for building my app. For the first time, navigation drawer not selecting / highlighting the item I selected (It was working in material 2). Screenshot: This app must selecting settings item right now, but the indicator doesn't show up This is what I'm looking for: I followed documentation but it...

Vertically scrollable component was measured with an infinity maximum height constraints Jetpack Compose I have this hierarchy in a compose file, Column { // Views Card{ Column { // views // HERE I HAVE DYNAMIC LIST } } } I tried to solve it like this LazyColumn { // Views item { Card{ Column { // views items { } } } } } Also like this: Column { // Views Card{ LazyColumn { // views...

parameter specified as non-null is null after migrate to MVVM I am learning android and doing an educational pet project for myself. I tried to rewrite the project in MVVM, but got this error: java.lang.NullPointerException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkNotNullParameter, parameter listener at com.onopry.budgetapp.model.TransactionService.addListener(Unknown Source:2) at com.onopry.budgetapp.viewmodels.TransactionsViewModel.loadTransactions(TransactionsViewModel.kt:23) at...

ktor client post request causes error `lateinit property nextElementName has not been initialized` I'm trying to use ktor to make a simple post requests to a remote API. There's a single endpoint, and the request and response body is in JSON. I'm using ktor 2.0.1 Kotlin 1.6.21 Kotlinx Serialization 1.3.2 Kotlin Coroutines 1.6.1 The endpoint I need to POST to is https://mods.factorio.com/api/v2/mods/releases/init_upload - details here. I've created a client private val client = HttpClient(CIO) {...

call an activity from an fragment which extends a fragment class I am trying to call an activity called playerActivity from one of my fragment called Homefragment which uses an recycler view. I have created an interface to communicate between my fragment and activity but when i click on the recyclerview list it does not go to the activity. please suggest.* class MusicAdapter(private val context: Homefragment, private val musicList: ArrayList, var listener:OnItemClick? = null) : RecyclerView.Adapter() { class Musicholder(binding: SongviewBinding) :...

Conflicting overloads when add suspend I have a working application, but I would like to improve one point. The method ("private fun save"), which is responsible for saving the information I need, I would like to make asynchronous. But the problem is that when I change it to - "private suspend fun save", I have to make suspend and override fun intercept method. But since it is override, I get an error: Conflicting overloads: public open suspend fun intercept(chain: Interceptor.Chain): Response defined in...

Prevent system font scaling - Jetpack Compose I am trying to restric the app from affected fro system font scaling. I had gone through many solutions but none helped. Most of them tell use dp instead of dp for text sizes but in compose we can use only sp if i am right as it expects a Text Unit. Is there any right way to restrict font scaling in our app done with jetpack compose ? Please help . (Solutions refered) : <a...

How To Text and Image And Video Retrive In same ScroolView Kotlin? I create adapter and want to Retrive on all us same page and implement the Retrive function Text And Image Is tack Support but Not To Support on Video and also not to tack VideoUri

ACTION_GET_CONTENT. can't select file After copying the text file created on the PC to Android, try to open the file. However, when I try to open it with ACTION_GET_CONTENT, the file I have already opened is visible on the initial screen, but it cannot be selected, and I have to go to my file folder to open it. Was it originally like that? AndroidManifest.xml Main Activity Dexter.withContext(this) .withPermissions( Manifest.permission.CAMERA, Manifest.permission.INTERNET,...

Kotlin flow - emitting value of combined 2 flows only when second flow emits a value I want to combine two flows in that way: the combined flow emits value only when both flows emitted a value and only in moment when second flow emitted its value. When it occurs, next value is emitted again when both flows emitted new values. My pretty drawing for better understanding the expected result: But it may appear situation like that:

Glide displays half image The image is available in sd card. Glide loads the half image into imageView.

Kotlin coroutine I try to understand how parent - child relationship works in that case private fun coroutineTest() { val job = CoroutineScope(Dispatchers.IO).launch { val standAloneJob = Job(coroutineContext.job)//this will create the relationship parent - child launch(standAloneJob) { delay(2000) Log.d(TAG,"I'm here") } delay(4000) if(standAloneJob.isCompleted) { // always false...

How to split an array of objects in java or Kotlin? I have already asked one question about this here but, that answers about only strings. I could not edit that as there a couple of answers there already. Now, I get it how to split it with a space as given in that post. But, how can I split it with objects of custom class like this: public class User{ private boolean isAdult = false; private int age = 0; @Override...

Create fragment in viewpager adapter when tab selected There are two fragments inside viewPager. When the main fragment load the location permission code on the second fragment that work. Want that fragmen work when click the second tab. So I think I need to create this fragment when selected second tab. How can detect and do this? OurHospitalFragment.kt viewPager2OurHospital.adapter = adapter viewPager2OurHospital.offscreenPageLimit = 1 TabLayoutMediator(tabLayoutOurHospital, viewPager2OurHospital) { tab, position ->...

Duplicate class found after adding module in android studio When built differently, both of my projects operate perfectly. Now I'm integrating them into one, and I've included project-1 as a module to project-2. Here is my Project 1 Gradle. apply plugin: 'com.android.application' apply plugin: 'com.google.gms.google-services' apply plugin: 'com.android.application' apply plugin: 'com.google.gms.google-services' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' apply plugin: 'kotlin-kapt' apply plugin:...

How to change the color of material button when it's pressed on? I changed the color of materialButton in themes.xml by overlaying the default theme: rounded #C4C4C4 50% @style/ShapeAppearanceOverlay.Roomie.Button But now i want to set another background color for when it's pressed on. How can I do that?

Kotlin: Default value for dynamically typed arguments Why this is correct and the below one is wrong? Correct one fun main () { AppModule().provideHttpClient(CIO) } Wrong fun provideHttpClient(engineFactory: HttpClientEngineFactory = CIO): HttpClient Type mismatch. Required:HttpClientEngineFactory Found: CIO With CIO being defined as: public object CIO : HttpClientEngineFactory { init { addToLoader() } override fun create(block: CIOEngineConfig.() -> Unit): HttpClientEngine =...

Hello all!!!I have problem with build.gradle Hello everyone) i am making a small android app about the weather on kotlin. And I have this problem, changing the classpath does not give anything. Problem Could not find method classpath() for arguments [android.arch.navigationnavigation safe args gradle plugin2.1.0-alpha02] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler* build.gradle(project) plugins { id 'com.android.application' version '7.2.0' apply false id 'com.android.library'...

Serializer has not been found for type 'Any' Im trying to serialize a Json file. But there's many variables with the type 'Any', and the @Serializable annotation is not working with this type. I've tried to do exactly like the answer in this question: Kotlin serialization: Serializer has not been found for type 'UUID' But the problem is that there is no "from string()" function for the type 'Any'. Is there a...

How to make concrete implementation of an interface not accessible outside the scope of the library.? I'm working on developing an Android library. I want to make a few classes inaccessible to the users who implement my library. Mostly the interface realization classes. For instance, I have the following classes in moduleA, Animal ( interface ) Dog ( Realization of Animal interface ) AnimalProvider ( Object that helps to initialize Animal object from the activity/any view ) Since I'm using Kotlin I made Dog an internal class to make it inaccessible outside the library scope. But, the problem...

Generated NavDirections classes include applicationIdSuffix in Resources package name I just updated gradle / android studio and now I get the following issue when I try to run a build type. Unresolved reference: R The problem is that the generated NavDirections subclasses now include the applicationIdSuffix in the import statement for the R file. So instead of com.my.app.R it now generates com.my.app.development.R which is obvisouly wrong. I tried to specify the packagename in the Gradle file using resourcePackageName, but it didn't help. Does anyone have an idea of how I can...

Android - Firebase login via Google-auth I want to log in using google, but I still get task.isSuccessful = false. I cannot go through this condition I will also add that on firebase there is added SHA-1 and updated JSON file. Any suggestions on how to solve this? :) My code class GoogleAuth : StartActivity() { private lateinit var firebaseAuth: FirebaseAuth private lateinit var googleSignInClient: GoogleSignInClient private companion object { private const val RC_SIGN_IN = 100 } override fun...

Why does Kotlin's null safety not work properly with local variable initializers? Please look at this code: fun localVarNullSafety1(){ var number: Double? = 3.0 val sum = 2.0 + number // does not compile (Type mismatch: inferred type is Double? but Double was expected) } fun localVarNullSafety1(){ var number: Double? = null number = 3.0 val sum = 2.0 + number // compiles fine } I think that the above code consists of semantically identical functions - local variables don't go outside the scope, and they are local to the executing thread. In my...

How to I get data from blog into android? I have a blog link (https://truecaller.blog/2018/01/22/life-as-an-android-engineer/) I need to fetch the text from this blog and show some parts of it on the android screen. For eg: 1:Find the 10th character and display it on the screen 2:Find every 10th character (i.e. 10th, 20th, 30th, etc.) and display the array on the screen

Merge two different data class lists in to the the third one Kotlin I want to add additional field to my new data class from the old one which has an extra field of balance value. I have created data class list with the ID and the Values (balance), which I want to merge first data class list with the second to make 3rd list - similarly like union in sql. first data class data class Coin( val id: String, val price_usd: Double, val name: String, val rank: Int, val symbol: String ) second data class private val coinBalance: List = listOf(...

How to Set the name, email, and profile to respective field in Kotlin | Android Because of this two line my app is getting terminated sName = findViewById(R.id.user_name) sName.text = name the complete code //Write your code here mAuth = FirebaseAuth.getInstance() //display profile information such as profile_image, name, email account val user = mAuth.currentUser profileImage = user?.photoUrl.toString() name = user?.displayName.toString() email = user?.email.toString() Log.e("DisplayName", name) Log.e("Profile_url",...

Failing to create a fat jar using Gradle + Shadow I am trying to use Shadow Gradle plugin to create a fat jar. Part of my build.gradle.kts looks like this: plugins { application kotlin("jvm") version "1.6.21" id("com.github.johnrengelman.shadow") version "7.1.2" } group = "com.test" version = "0.1" application { mainClass.set("com.test.ApplicationKt") } Everything is good, but I want to include .properties files in the fat jar as well. I am...

Translating logic into Kotlin (or Java) code So for example, I have a use-case where I want to enable users to write simple logic, and behind the scenes, convert this logic into a condition in the code. For example: The user might write: someFieldName > 10 AND otherFieldName is NULL And I'd like that to generate the following code: if (data["someFieldName"] > 10 && data["otherFieldName"] == null) { // Do something } After doing some research, I saw that one of the options is using eval (by leveraging a JS engine), although it...

How to concatenate two kotlin flows? As stated, I'd like to concatenate two flows sequentially therefore merge won't work. Example: val f1 = flowOf(1, 2) val f2 = flowOf(3, 4) val f = concatenate(f1, f2) // emits 1, 2, 3, 4