How to create curved text in Android? Is this possible to do curved text in Kotlin / Flutter. Using any library or anything else if it's possible please help me like :

Int -> Property must be initialized or be abstract Android Studio 3.6 In Kotlin I try this: private var tableNumber: Int but get compile error: Property must be initialized or be abstract

Scroll-up button Android I have small problem. I have in layout scrollView with TextViews, now i have to set button to scroll up scrollView, but i don't know how to set well imageButton in my layout. This is my schema. I have to set this imageButton in place, where i show in schema, TextView5 is veeery long, and when it start scrolling the imageButton should start be visible, before scrolling it should be invisible. To scroll it...

Mock constant values in with mockk We currently have an object that consists of constant values only. object Constants { const val VERSION = V1 } However, these constants' values may be altered in the future. Thus I want to ensure that a test breaks if certain conditions are not met by the VERSION value. We use Mockk for mocking so I tried to mock the Constants object according to the docs like this mockkObject(Constants) every { Constants.VERSION } returns -1...

Searchable Spinner is not updating the list I have a problem please help me out. I am using this searchable spinner Searchable spinner and I have succeeded in implementing this spinner in my app using Kotlin and evertinhg is working fine bit the problem I am getting is that the when I am using the serach bar to update the list its not updating the list. I know there is a predefine method called "notifyDataSetChanged();" but it is not working...

Kotlin: Convert date string to ISO string I have a date String with following format: MM/DD/2019 Possible values could be 1/16/2019 or 11/31/2019 for example. I'm searching a way to convert this String values to get the following format: 2019-11-31 150757.013Z How can I do that in Kotlin ?

Two mediator live datas observe each other I have TextInput, and SeekBar. I Need to change seeker's value by text input value (numeric), and change the text value by seeker changed value. using View-Model and Live data binding So, I have two mediator live datas in viewmodel class ViewModel: val progress: MediatorLiveData by lazy { MediatorLiveData() } val progressText: MediatorLiveData by lazy { MediatorLiveData() } which are observed by each other in init scope. init { progress.apply { addSource(progressText) {...

How to use an extension function in a companion object Is it possible to define and use an extension function in a class' companion object? In this example removePadding() is the extension function being used in Point.parse(). data class Point(private var x: Int, private var y: Int) { companion object { fun parse(text: String?) = text?.removePadding() ?.let { "(\\d+),(\\d+)".toRegex().find(it) } ?.mapNotNull { it.toIntOrNull() } ?.let { Point(it[0], it[1]) } // define removePadding()...

FileChannel.truncate(...) method truncates at wrong position I am using the FileChannel.truncate() method to remove the last part of a file, from the text "metadata" until the end: override fun truncate(file: File) { val fileAsText = FileUtils.readFileToString(file, Charset.defaultCharset()) val metadataPosition = fileAsText.indexOf("metadata") val channel = FileOutputStream(file, true).channel...

Android. Creating socket connection between few devices For my project I need to connect few devices. Main idea: one device becomes a 'Server', another ones - 'Clients'. 'Server' contains all business logic, gets data from 'Clients' and receives it to them. And I've faced huge problem with creating connection between devices: I tried com.google.android.gms.nearby package. It works well, but to slow. Can be used with 2-4 devices, but with 6-7 there is problem with initial connect, so this way is not suitable. I tried MulticastSocket from...

Methods to set content view in Jetpack Compose UI I had three question There is setViewContent which accept composable function as input parameter similar to setContent. So, what is a difference between setViewContent and setContent and its use-cases. You can able to see setViewContent in androidx.compose package. setContent and setViewContent both return CompositionContext?. So, how and for what, we will use CompositionContent. Is there any way to integrate existing layout.xml with new compose ui in same activity or fragment.

removing items from recyclerview error how can i resolve? class AdapterClass:RecyclerView.Adapter() { var indixepersonas:MutableList = ArrayList() lateinit var context:Context fun constructor(person: MutableList, context: Context) { this.indixepersonas = person this.context = context } fun remove(position: Int){ indixepersonas.removeAt(position) notifyItemRemoved(position) notifyDataSetChanged() } override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder { //gonfia...

Android Client for Nginx Push Stream Our server is used to Nginx and Push Stream. Now we move from Restfull to Websocket and the last is used to Server Sent Event (SSE) such as event stream or text/event-stream. Please anyone have any idea library event stream for android client. I have already used to Okhttp but there is not ready yet used event stream, RxSSE is not able to use in Android no respond at all.

Force all Kotlin Sealed classes to have a standard entry? I am investigating Kotlin Sealed Classes. I wish to force all my Sealed classes to have a standard value of NO_OP. for example:- Sealed Class 1 sealed class Operation { object NO_OP: Operation() class Add(val value: Int) : Operation() class Substract(val value: Int) : Operation() class Multiply(val value: Int) : Operation() class Divide(val value: Int) : Operation() } Sealed Class 2 sealed class ScreenState { object NO_OP: ScreenState() class Error :...

How to make consecutive calls in mockk for single mocked object I am trying to figure out how can I achieve this using mockk. I wanted to test retry mechanism. I have a code which does something like this: fun callSomeHttpUrl() { try { makeCall() } catch (e : HttpCallFailed) { try { makeCall() } catch(e : HttpCallFailed) { quitApp() } } } In the past I could have done this with Mockito and Java: when(httpMock.makeHttpRequest()) .thenThrow(new RuntimeException()) .thenReturn(randomObject);...

What is the purpose of multibindings in dagger? I have gone through many tutorials, they were saying it binds several objects are bound in different modules. I couldn't get what is the purpose, Although i know MVVM architecture and dagger and they were started using @ViewModelKey and providers as value? I could only see implementation of multibindings using dagger, but not getting clear idea purpose of multibindings in dagger2.

sum of arraylist elements getted by cursor I've a table of Holidays, I'm trying to check if some specific one took any holidays before This is my table construction: db.execSQL("CREATE TABLE IF NOT EXISTS Holidays (HolidayID INTEGER PRIMARY KEY, Department TEXT NOT NULL, Profession TEXT NOT NULL, EmpName TEXT NOT NULL, DaysofHoliday TEXT NOT NULL, StartDay TEXT NOT NULL, StartMonth TEXT NOT NULL, StartYear TEXT NOT NULL, EndDay TEXT, EndMonth TEXT, EndYear TEXT, PresentedDay TEXT NOT NULL, PresentedMonth TEXT NOT NULL, PresentedYear...

KDoc: change parameters order I have the following parameters in a companion object on Kotlin companion object Constants { /** * Values for the various type of connection that a device can have. */ const val CONNECTION_KEY = "Connection_type" const val CONNECTION_AUX = "AUX" const val CONNECTION_BLUETOOTH = "Bluetooth" const val CONNECTION_USB = "USB" /** * Unique IDs respectively for devices and media elements. */ const val DEVICE_ID_KEY = "Device_ID" const val...

Dagger 2 Qualifier not working in Kotlin on Android module I'm trying to provide 2 Firebase CollectionReference objects with Dagger2 @Provides @Singleton @FirebaseSongsDatabaseReferenceNamed internal fun provideUserSongsDatabaseSnapshotRef(dbRef: FirebaseFirestore): CollectionReference = dbRef.collection("users-songs") @Provides @Singleton @FirebaseUserListDatabaseReferenceNamed internal fun provideUsersListDatabaseRef(dbRef: FirebaseFirestore): CollectionReference = dbRef.collection("users-list") @Qualifier @MustBeDocumented...

DAO testing: NoClassDefFound error androidx/test/InstrumentationRegistry Hello everyone I am writing DAO test and I am stuck at this line: database = Room.inMemoryDatabaseBuilder( getContext(), SomeDatabase::class.java).build() I am getting this error: java.lang.NoClassDefFoundError: androidx/test/InstrumentationRegistry Caused by: java.lang.ClassNotFoundException: androidx.test.InstrumentationRegistry I have added to my build.gradle : testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" but still no luck. Have anyone...

Grid searching algorithms I have a N x K game grid, where N & K are rectangular dimension of the grid. Each cell can contain a single object of type A, B, C, D or E At the start of the game the program initially populates the grid at random with entities of type A. Cells containing entities of type A are unusable (they may as well not exist) The remaining usable cells need to be populated with the remaining entities subject to some constraints: Each entity (B, C, D, E) has a "strength" property which determines how...

Do you know the name of this component? I'm working on a project and I need a component similar to the one in the picture to select a date. I know this can be achieved using maybe adapters or something, but I don't want to redo something that already exists. Thank you.

Kotlin function collapse in IntelliJ / Android Studio For Java classes IntellliJ/ Android Studio's "collapse all" keyboard shortcut collapses just methods: However the same is not true for Kotlin classes. Instead the whole class is collapsed. Before I report this as a bug, is there a known flag/workaround/setting? I don't see a way in IntelliJ/AndroidStudio preferences to change what "collapse all" actually collapses <a href=""...

Single delaySubscription equivalent in Completable In one of my tests (I'm new to testing, any feedback is welcome) I can manually trigger the completion of a Single by calling delayer.onComplete(). With this I'm able to test if the loadingObservable: LiveData is set to true when doing a network request and false when its done. How can I achieve the same with a Completable? // This test works fine @Test fun repositoryGetAllCategoriesBeforeItEnds_loadingObservableValueIsTrue() { // Arrange val delayer = PublishSubject.create()...

Dependency injection with IntentService doesn't work I want to create TCP_Client which sends data to server in many activities. I decided to use Dependency Injection to inject all samely configured clients to all clients. Unfortunately it stops working on start. My application module val appModule = module { single { ConnectionServiceTcp("192.168.0.1", 8888) } } Main Application class MainApplication : Application() { override fun onCreate() { super.onCreate() startKoin {...

Spring Boot - How to exclude one component during scan? I have a JAR dependency that I am required to use. There is one component in that JAR that is interfering with a part of my Spring Boot application. I need to exclude that ONE component, and changing the component definition in the JAR dependency is not currently possible. I have tried the following, but it does not work, the bean is still loaded: @SpringBootApplication @ComponentScan(useDefaultFilters = false, excludeFilters = [Filter(type = FilterType.ASSIGNABLE_TYPE, classes =...

What is the preferred file naming convention in Kotlin for a utility collection? As being new to Kotlin, I'm not sure what the right name would be for a file like the following: package de.company.carbase import de.company.carbase.model.Car typealias CarSupplier = () -> Car I named it to cars-utils.kt. Only lower case and intentionally with a hyphen to distinguish it from regular class files. This seems okay for me, but maybe there is an established convention I missed?

Android: On missed calls reset I am trying to sync the amount of missed calls to another device. I've figured out how to get the current count and how to react to a new missed call using PhoneStateListener. What I didn't find however is a way to react to users "seeing" these missed calls, i.e. opening their phone app and thus resetting all missed calls. Is there anything I am missing here? Thanks for your help!

Kotlin class in other package not resolved I started with Kotlin and want to exclude files in other packages in Visual Studio Code. Unfortunately it does not work Person.kt package com.example public class Person( val _firstName: String, val _lastName: String, val _age: Int ) main.kt import com.example.Person fun main(args: Array) { val person = Person("Peter","Pan",12) println(person) } When I hover over in the main function Visual Studio Code show me the Person class, thus it seems that it is recogniced...

What is Java equivalent to Function0 and Function1 of Kotlin? I was trying to implement Github Link library in my java project. And I don't want to use Kotlin in my project, so I was custom coding the whole library into Java. Any help appreciated. It's hard to convert Kotlin to Java rather the opposite. I have worked with decompiling Kotlin Bytecode, which somewhat helps you to convert it into Java. And that's where it's getting confusing where Function0 and...