How can I delete canvas content drawn by user in Jetpack Compose? I'm trying to implement a simple AlertDialog in Jetpack Compose where the user can draw and save a signature to files dir. I previously implemented this in XML but I'm stuck at clearing the canvas. AlertDialog( modifier = Modifier.fillMaxWidth(), onDismissRequest = { /*TODO*/ }, title = { Text("Draw something") }, text = { Box( modifier = Modifier .width(600.dp)...

MYSQL mysqldump.sql to POSTGRES using flyway I'm trying to migrate on start a mysqldump.sql file but I get this error : org.postgresql.util.PSQLException: ERROR: syntax error at or near "`" Position : 69 at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2565) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2297) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:322) at...

why first row in tic-tac-toe game works strange in runTime (android studio, kotlin)? I have write a code for a tic tac toe game with android studio, kotlin. according to some of YouTube videos the logic is ok but after running the app, when I click on each of buttons in first row, it shows player the winner! but for other rows the logic works as it should. here's the code: variables and onCreate: private var buttonArray = arrayOf(arrayListOf(), arrayListOf(), arrayListOf()) private var player1Turn = true private var roundCount=0 override fun...

Interface containing function and data class. Kotlin I am new to Kotlin and I came up with question about interface which contains function, also data classes like input and output. Take a look to example below. interface SomeInterfaceName { fun SomeFunction(input: Input): Output } data class Input() { val inputField: String } data class Output() { val outputField: String } Is this correct? Are there any patterns, which says that we cannot do it? Thank you in advance for responses

I'm following udacity's kotlin android lectures, error while refrencing ids, got to know about kotlin's synthetic support end. How to reference them?

When recomposition happens exactly? with changing the state or also with changing the input As far as I understood, each part of code which is related to any state will be changed(recomposed) with state changes → And each state is an observable and the dependent UI part observes that state and is subscribed to it(the state) and whenever the state changes it will be notified(redrawing that part of UI) and happening recomposition. But here in this article of google <a href="https://developer.android.com/jetpack/compose/mental-model#recomposition" rel="nofollow noreferrer">Thinking in...

Starting a non-Main Activity from other app clearing its top I have two apps, the app 'A' and app 'B' and the first app it's composed of one activity (1) and the second app have two activities (1, 2). The thing it's that I need to call from A1 to B2 without having B1 appearing. But when I call it, always shows first the B1 and then passes automatically to B2 and when I push back on B2 I need to get back to A1, but it returns to B1. This is my code when calling the intent: val intent = Intent() intent.component = ComponentName("com.app.appB",...

How to pass a variable from main function to another function and modify it? (Kotlin) I am aware that an argument passed to a function will be seen as "val", even if the variable was initialized as "var". But this has been a problem for me. In this example code below, I want to modify the value of variable "num" by using the function "changeNum". But of course, Kotlin won't allow me to modify it. How do I get around this? How can I use the function "changeNum" to modify the variable "num"? fun main() { var num: Int = 5 changeNum(num) } fun changeNum(num: Int){ num...

In JetpackCompose we see all built in composables have flatten inputs,is it with purpose? or wrapping the inputs with data class has same performance? In Jetpack Compose we see all built in composable have flattened inputs, is it intended? Or wrapping too many inputs with data class (which is good and clean practice) has the same performance? Consider this sample data class SettingsItemEntity( val title: String, val description: String? = null, @DrawableRes val imageResId: Int? = null, val isChecked: Boolean? = null, val showDivider: Boolean = true, val onItemClicked: () -> Unit = {}, val onCheckedChange:...

ConfigurationProperites not applied in SpringBootTest? We have the following configuration properties class (reduced the minimum) @ConstructorBinding @ConfigurationProperties(prefix = "prefix") data class MyConfiguraion( val mapping: MutableMap ) The configuration in the application yaml looks like this: prefix.mapping: value1: a: 1 b: 2 using the application.yml, the map is passed correctly, though if I want to test it with SpringBootTest, the map is not passed, instead an empty map is passed to the constructor:...

NetworkBasedLoction by using FusedLocationProviderClient I am new to Kotlin android. I am working with location and i used the FusedLocationClient Api. Now i want to use Network based location with FusedLocationClient Api, i mean if gps turned off device get the location from network. Is it possible?

Android Kotlin custom BottomSheetDialog automatically open when I insert something to Room Database In my custom BottomSheetDialog, I've made a pop up to register something. But when I insert data from dialog to Room Database, The BottomSheetDialog again appear on the top of screen elements !! But I didn't wrote any code for re-opening the BottomSheetDialog!! Here is the Entity and Dao class: Category2Entity @Entity(tableName = "categories_2") data class Category2Entity( @PrimaryKey @ColumnInfo(name = "id") val id: Int = 0, @ColumnInfo(name = "name") val name: String = "",...

Mock Java interface anonymous implementation in Kotlin with Mockk I have simple Java interface with one method, which is implemented as anonymous class in Kotlin code using the lambda syntax. I'm trying to mock the interface construction so that the method of the mock would return something else than the original. I'm using MockK for mocking, tried as constructor mock, static mock, object mock and normal class mock, but no luck, still returning the original. Any ideas? The interface (Java): public interface TheInterface { String getString(); } The...

Android custom Map Pin for google Map I want to create a custom view with a bitmap. But custom pin doesnt want display on Google Map My Activity: mMap.addMarker(MarkerOptions() .position(location) .icon(BitmapDescriptorFactory.fromBitmap(MapPinView(this).getMarkerBitmapFromView()))) and for custom Pin i want create View without xml file, i will improve it later but for now it looks like this: class MapPinView constructor( context: Context, attrs: AttributeSet? = null,...

Spring sleuth not showing traceid and baggage in couroutine thread I am trying to implement Spring Sleuth and want to give it besides the traceid and spanid which are there by default also other items which I put in the baggage when a user makes a request to the endpoint. The issue is that the sleuth information is not showing in the coroutine thread but only the reactor threads. Here is a bit of my logging: 105352.316 [kotlinx.coroutines.DefaultExecutor] INFO [UserResource] - Test1 105352.394 [reactor-http-nio-6] INFO [WebClientLogging] - Finish...

Open the "Documents" directory of my app calling the Google Files app I am developing an app and I should open the "Documents" folder of the directory of my app using the Google Files app (presumably using an intent). In my app I have a recyclerView that, based on longClick event listener should open a certain directory calling the Google Files App. How can I achieve this?

make each word clickable in jetpack compose ClickableText will return position of clicked character but is it possible to make each word clickable and return it? @Composable fun SimpleClickableText() { ClickableText( text = AnnotatedString("Click Me"), onClick = { offset -> Log.d("ClickableText", "$offset -th character is clicked.") } ) } for example I have this string -> "This is a sample text" and I want to click word "sample" and return it as string

Is there a way to make flutter always pick the latest version of kotlin and gradle I've had kotlin version error or gradle version error many times. Don't want to update them manually every time.

Android studio Component tree nothing to show and Design preview missing What is the problem, cant preview design. There is only those 2 tools on screen?

Spring sleuth not always showing baggage but only the traceid I am trying to implement Spring Sleuth and want to give it besides the traceid and spanid which are there by default also other items which I put in the baggage when a user makes a request to the endpoint. The issue is that the baggage is not showing most of the time but only with doOnNext from the WebClientLogging. Here is a bit of my logging: 143432.684 [parallel-2] INFO [UserResource] - Test1 traceId=620e4ee81b71c332959a012fbd669053, spanId=959a012fbd669053 143432.764...

How to find the KClass of the owner of a companion object? I'm trying to get the class that owns a companion object so I can create loggers with inline technique inside a companion object but referencing the main class that is being logged and not the companion object. The problem is that I can't find a way to get the owner of the companion object, how can I do it? fun Logger(c: Class): Logger { var c2 = c val k = c.kotlin if (k.isCompanion) { c2 = k..java } // Calls a factory, reuse the same instance if it already...

Are Google persistent cloud anchors working when using Android emulator? I'm trying to develop an AR Android Application with Kotlin, using ARCore Google Persistent Cloud Anchors, along with sceneform, in order to place 3D models in several geographical locations. The requirement for using persistent cloud anchors according to this guide here, is to associate my Android app with an Oath 2.0 client ID, which is generated from Google Cloud Platform by...

Composable is recomposing endlessly after flow collect My composable is recomposing endlessly after flow collect and navigating to a new screen. I can't understand why. I'm using Firebase for Auth with Email and Password. I had to put some Log.i to test my function and my composable, and yes, my Main composable (SignUp) is recomposing endlessly after navigating. ViewModel // Firebase auth private val _signUpState = mutableStateOf(Resources.success(false)) val signUpState: State = _signUpState fun firebaseSignUp(email: String, password: String)...

How can I use the state on an external function? Can someone explain me how to use the state on the external function? All I get is: Unresolved reference: selectedTab on the composable function contentTabs var selectedTab by remember { mutableStateOf(Tabs.TabContent) } //... TabRow(selectedTabIndex = selectedTab.ordinal) { Tab( selectedContentColor = MaterialTheme.colors.onSurface, unselectedContentColor = MaterialTheme.colors.onSurface.copy(alpha = ContentAlpha.medium), selected = selectedTab.ordinal ==...

kotlin reject negative, string and float input I'm not allowed to change the toIntOrNull() and I need to reject every string, float, and negative input. I tried to do it with n is String but I just encountered and error. Is there any other way to do it? Here's my code: fun main(){ print("Enter number of numbers from Fibonacci: ") var n: Int? = readLine()?.toIntOrNull() //print("Input is Invalid!") var total = fib(n) print("Total $total") } An example of what should appear when a string, double or negative is...

NavArgs, Large data and ViewModel Problem In my application I have to use an object that we'll call Product through different Fragments. Actually I pass Product through arguments, and I store it in my ViewModel : class MyFragment : Fragment() { private val viewModel: MyViewModel by viewModels() } class MyViewModel @Inject constructor(private val savedStateHandle: SavedStateHandle) : ViewModel() { val product: Product = savedStateHandle["product"]!! } @Parcelize data class Product(val id: Int, ...) : Parcelable...

How to use Hilt into adapter on Android In my application, I have RecyclerView Adapter and for this, I write a unit method with lambda! And in this my application I used Hilt library for DI. But after running the application shows me an Error! In my application, I have RecyclerView Adapter and for this, I write a unit method with lambda! And in this my application I used Hilt library for DI. But after running the application, it shows me Error! My Adapter codes : class NoteAdapter @Inject constructor(val clickListener:...

How can I bind options menu using viewBinding in Android studio <a href="https://i.stack.imgur.com/hR12Z.png" rel="nofollow noreferrer">I want to bind options menu with view binding and I dont want to access menu files like (R.menu.), how can ı bind this one using viewBinding in kotlin ? </a>

rxObservable from coroutines-rx2 lib doesn't work with Observables.combineLatest I'm trying to gradually convert an android code base from RxJava2 to Kotlin coroutines. We are using UseCases and Repositories. I've converted one of the repository methods returning Observable to be a suspend function. Now, there was a UseCase using Observables.combineLatest to combine 2 repository Observables, one of which is the one I converted to be suspend. In order to still use that UseCase function as is, I converted the suspend function to be an observable using kotlinx-coroutines-rx2...

How to replace the content of a TopAppBar dynamically? Imagine I have a TopAppBar (1) like In Code similar to: TopAppBar( backGroundColor = Colors.black ) { Row(modifier = Modifier) { Icon( // 2 modifier = Modifier.size(24.dp), id = R.drawable.ic_hamburger_menu, onClick = { openMenu() } ) Text( // 3 modifier = Modifier, text = "Page Title"...