Navigation drawer below TopAppBar in Jetpack Compose I am using Jetpack Compose for developing one app which contains multiple screens and we can navigate to them using Navigation Drawer. How can I put my navigation drawer below TopAppBar ( or Toolbar in Android). Below is the gif for the issue: Below is the composable function for my screen: fun Home(navController: NavHostController) { val scaffoldState = rememberScaffoldState() val coroutineScope...

How to implement setText to integer dataType in Kotlin?

How to prepopulate realm file in Kotlin SDK? In Java SDK, I was creating Realm.Configuration object with the realm file that located in asset folder. I couldn't find any equivalent property in Realm Kotlin SDK in java SDK: val populatedRealmConfiguration = RealmConfiguration.Builder() .schemaVersion(REALM_VERSION) .compactOnLaunch() .encryptionKey(resolveEncrypt(RealmHelperStatics.EncRealmKey).toByteArray()) .assetFile("populated.realm") .name("populated.realm") .allowQueriesOnUiThread(true)...

How to get a list of classes that extend from a base class in Kotlin? consider following classes structure in Kotlin: open class Base { ... } class A : Base() { ... } class B : Base() { ... } ... class Z : Base() { ... } How would I go around getting a list of ALL classes (A-Z in this particular example) that inherit from Base class? I tried using reflection with BaseTest::class.nestedClasses and other reflection properties but they don't seem to be finding number of extending classes properly.

Dagger2 & Kotlin: lateinit property has not been initialized I trying to inject presenter using Dagger, but I get an error: lateinit property loginPresenter has not been initialized. I can't find what I may be doing wrong. See the code above from my classes. This is the first time I'm facing this problem. LoginActvity.kt package com.xsavzh.vkfriends.activities import android.content.Intent import android.os.Bundle import android.view.View import android.widget.Button import android.widget.TextView import android.widget.Toast import...

How to convert png or jpg to webP using kotlin code? I want to write a kotlin code that converts png or jpg to webP.

I am learning Android studio and doing a rectangle calculator, my kotlin has 19 errors and cannot figure it out I am learning Android studio and doing a rectangle calculator. My Kotlin has 19 errors, and I cannot figure it out. I keep getting unresolved errors for btn, functions that cannot be called, and expecting an element. I am trying to do a calculator that takes height and width and then calculates area and perimeter. Just need guidance on what I am doing wrong and not looking for someone to give me new code. MainActivity.kt package com.example.calculator import android.annotation.SuppressLint...

Can pass data from View to ViewModel? Is there mistake if I pass data from View to ViewModel? For example, pass url from onPageFinished event of WebView. I am confused because all source tell that ViewModel mustn't have any link to View. In this case will be such link or not? Or if type of argument will be custom data class than just string? class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding private val viewModel: MainViewModel by viewModels() override fun...

How get updated value between dialogFragment and Fragment? I'm have Fragment and DialogFragment, they have own viewmodel's. After click "Ok" in dialogFragment call method, that update record in DB and return result to parentFragment, but navigate to parentFragment work faster then update DB, and list not updated. Now i just use sleep(500), to wait updated value, how fix that? Fragment class EmployeesFragment :...

How to notify adapter if the fragment deatched or destroyed [needed for Admob NativeAd AdViewHolder] In my app, I have implemented ad mob native ads inside my PostAdapter class, I have 7 different fragments, and I need to know when the fragment is detached or destroyed to call nativeAd.destroy() to avoid leaks like said in the documentation Be sure to use the destroy() method on loaded native ads. This frees up utilized resources and prevents memory leaks. so my trying to solve this problem, I...

Android WorkManager getting reference to Worker class I'm facing following problem: there's my class which inherits CoroutineWorker. Logic of this worker is complicated enough, in fact doWork() calls bunch of other routines inside and catches (collect) results of several StateFlows, like: override suspend fun doWork(): Result { //blah-blah withContext(Dispatchers.Default) { _scanResultState.collectLatest { //blah-blah } } return ... } Questions: Can I somehow return/put...

Kotlin handle a different type in constructor lets say that for an example I have a data class that's like this data class AB(a: String, b: String) how do I make a constructor (or if there is any other way) handle a different type, for example if get an "a" variable as an Int and I want to handle it and covert it to a string? Thanks!

Where does Spring Webflux create a coroutine scope when using suspend functions? This is a question about how Spring Webflux works under the hood. When we build our Spring Webflux application in kotlin we can use suspend functions and interfaces like CoroutineCrudRepository to ‘get rid of’ abstractions such as Mono and Flux. However, we do not need to explicitly create a coroutine scope somewhere so it seems that Spring takes care of that. Where does Spring create this coroutine scope? I would guess that a new scope is created when a request comes in and Spring then...

Firebase Vision confusing characters I'm using Firebase Vision, from MLKit, together with CameraX for text recognition in Android. The problem is that the results are not very consistent. Depending on the font, these recognitions may vary. For example, sometimes it's confusing the character 'b' with the digit '6'. This is not a problem if you only need digits in your result. But sometimes it's confusing digit '7' with digit '1', which is quite annoying for a digit detector. Is there any way to improve these results? Larger...

How to send Array Int as Request Body in Retrofit? How to change array of int to request body?

Get current time in Unix Timestamp Kotlin? How can I get current time in Unix Timestamp format in kotlin as integer?

Map get with null key I'm confused by Kotlin's null safety features when it comes to maps. I have a Map. Yet I can call map.get(null) and it returns null to indicate that the key is not present in the map. I expected a compiler error, because map is a Map and not a Map. How come I can pass null for a String argument? And a related question: is there any type of Map, be it a stdlib one or a third-party implementation, that may throw NullPointerException if I call get(null)? I'm wondering if it is safe to call...

Unresolved reference when trying to check if textfield is focused I have some weird behaviour with FocusState in compose. I get this error Unresolved reference: isFocused when using FocusState.isFocused in this code (However I can use it elsewhere). Here is my code: @Composable fun SearchBar( modifier: Modifier = Modifier, hint: String = "", onSearch: (String) -> Unit = {} ){ var text by remember { mutableStateOf("") } var isHintDisplayed by remember { mutableStateOf(hint != "") } Box(modifier = modifier){...

Vert.x Web API Service codegen and Kotlin, issue with nested properties of referenced object I'm trying to generate Web API Service from yaml openapi: 3.0.1 info: title: "" description: '' license: name: Apache 2.0 url: http://www.apache.org/licenses/LICENSE-2.0.html version: 1.0.0 servers: - url: http://localhost:3001 tags: - name: user description: Operations with users - name: stream description: Operation with streams paths: /user/register: post: x-vertx-event-bus: user_manager.myapp tags: - user summary: Create user...

Android - how to create file object from Imageview image Im making and android app which let the user select an image from the phone and load it to an ImageView. The further process is to send the image as a POST request to a PHP script It all works fine if I load the image to a File object from the file location, but this require that the user open a setting on the phone which allow the app to access and manage local files.. So, is there a way to read the image from the imagview into a File object? This is my current working code val fil =...

TextView text not showing text While Running app I have created a Horoscope app using an API in kotlin. Everything is working fine but the text view is not showing any text. And here is my XML Code.

What scope to use for launching a task in Kotlin from a controller? My Kotlin App is using Spring to expose an API that should execute a long task in the background. We need to return @PutMapping("/refresh") fun refresh() = { GlobalScope.launch(IO) { refreshDataFromCache() } return ResponseEntity.accepted().body("""{"result": "accepted"}""") } IntelliJ complains that using the GlobalScope is an anti-pattern. However, I cannot just add suspend to the controller function or it won't work. Neither I can use runBlocking or the method will need to wait...

How to take backup locally of my Android App in Android Studio I m new to Android Dev. I have built an app(yet not released on play store) and thinking to add new features to it. But i m not confident enough and I think I might make mistakes and my app might get worse. How to I create a local backup of my android app? Should I just copy the files in which I set my projects to another location or there is another method?

How to show Multiple color text in same Text view with Jetpack Compose? I want to display text in multiple colors/style within same Text() component. How can i achieve this using Jetpack Compose? Sample:

How to return data from inside of addOnSuccessListener{} method in Kotlin? I am trying to get user data from Firebase Firestore database , I am intended to get info of user who is currently logged in. Now for make this information accessible from other Classes I created get method for username and email, when I used get method from Another class , I got an indexOutOfBoundsException with index 0,size 0. It looks like my array in global scope is not getting data when i called array.add() method from addOnSuccessListener method. package...

Jetpack Compose: Textfield doenst lose focus on click outside of it I am trying to implement a searchbar in my Compose app. I have a textfield, which I want to lose focus of and hide the keyboard, when I click outside of the textfield. However, I can't figure out how to do it. I did try to do it this way, which I saw on github. However, i did some changes. The original solution used this part of code isHintDisplayed = it != FocusState.Active which seem to be deprecated. So I changed it to isHintDisplayed = it.isFocused != true which should...

Composable fillMaxSize and rotation not working How can I rotate composables and still make them fill their parent? For example, I have a Column filling the Screen with two Boxes taking up half the size. The size of the boxes seems to be calculated before the rotation and not after. Column( modifier = Modifier .fillMaxSize() .padding(8.dp), verticalArrangement = Arrangement.spacedBy(8.dp) ) { Box( modifier = Modifier...

How to fix animation bug? I have a VideoView (circle) and custom animation (Falling cards) on the screen, in Fragment, as in the screenshot: I haven't figured out how to do it any other way, so I've inserted four CardViews, and I'm scrolling through them using AnimationUtils. In code it looks like this: onViewCreated() viewLifecycleOwner.lifecycleScope.launch { // withContext(Dispatchers.Main) { startAnimation() //...

Can a coroutine suspend and then resume on a different thread? Are the memory effects of the first thread carried to the second thread? Consider fun main(args: Array) { runBlocking { launch(Dispatchers.Default) { var a = 0 a++ delay(100) println(a) } } } Since the Dispatcher has multiple threads, is it possible for the program to change threads at the suspending delay function? Is it guaranteed that it will print '1' or does a need to be AtomicInteger?