Generate Parentheses in Kotlin I wanted to create a program that displays all valid arrangements for n couple of parentheses. The output should be an array sorted in ascending order of ASCII values. The following is the function that needs to be used. fun solution(n: Array): Array { } I tried it using this, but cannot make it fit the above function, fun balancedBracket(result: String, size: Int, open: Int, close: Int): Unit { if...

Get the receiver's number from an SMS on Android I am using the below code to get originatingAddress (the sender's number). import android.provider.Telephony.Sms.Intents.getMessagesFromIntent fun getFullMessage(messageParts: Array): CompleteSmsMessage { messageParts = getFullMessage(getMessagesFromIntent(intent)) messageParts.last().also { part -> return CompleteSmsMessage( originatingAddress = part.originatingAddress, body = messageParts .map { it.messageBody } .reduce { acc, body -> acc + body }...

Add to favourites functionality using MVVM Best Practice I am working with MVVM architecture and trying to use best practices in documentation. Let me explain what I have done and what is my problem. I have a fragment and a parent fragment. When user enters a string to searchview which is in parent fragment, I collect the data and fetch the list to recyclerview. I have a list adapter which takes care of favourite button for each elements in recyclerview. And I implemented a callback to listadapter: val onFavouriteChanged: (id, isFavourited) ->...

Avoid model duplicates in Spring-boot for different dataSources I'm using Spring-Boot with Kotlin and try to save a "Student" object into 2 different databases. (PostgreSQL and Redis) To achieve this I created 2 Student models, because Postgres and Redis need different annotations. @Entity @Table(name = "student") data class StudentPostgres( @Id var id: Int? = null, var name: String? = null, var gender: Gender? = null, var grade: Int? = null ) { enum class Gender { MALE, FEMALE } } @RedisHash("Student") data class...

How can I put the limit for numbers in textfield for android jetpack compose? I have a textfield in android jetpack compose, so I want to put limit for numbers, for example; user can write only numbers from 1 to 10, is it possible to do it in jetpack compose? @Preview(showBackground = true) @Composable fun OutlinedTextFieldComposable() { var text by remember { mutableStateOf("") } OutlinedTextField( value = text, onValueChange = { text = it }, label = { Text("Label") }, keyboardOptions = KeyboardOptions(keyboardType =...

Java cannot access Kotlin's Companion I am trying to use kotlinx serialization in java code. The problem I encounter is that I cannot use Companion object in java code to access it's static serializer() method which is generated by kotlin serializaton plugin. Here is the kotlin code that decalres a serializable class: @kotlinx.serialization.Serializable data class MyData(private val data: String) My mavem pom.xml file is shows below 4.0.0 org.example TestProject 1.0-SNAPSHOT 18 18 1.7.0 1.3.3...

Mocking suspend function so that it rise an exception (Kotlin, unit testing, mockito) I have a suspend function: override suspend fun fetch( userId: String, userChannel: String, deviceId: String, ): List { val docSelector = ... return db.getCollection().find(docSelector).toList() } I want to mock it in the test so that when it is called, an exception is thrown. I did it this way: this is the block of production code which calls the fetch() function and in which I want to jump to line (1) when running from the test...

Kotlin inflate two layouts in one Fragment I have a problem, and I cannot change it, because project is big and I have a task, to get to included layout (B) button in main layout (A). I have a standard binding in onCreaveView, but I need to get to button which is included in layout. My Fragment looks like this now: private val bindingA by viewInflateBinding(FragmentABinding::inflate) private val bindingB by viewInflateBinding(FragmentBBinding::inflate) override fun onCreateView( inflater: LayoutInflater, container:...

"You cannot perform this action on PaymentIntents created by Checkout" on client side Stripe I've started to implement Stripe into my Android app, and that error keeps popping while trying to make payments. I get the paymentIntentID and the clientSecret from the backend, where those are generated. When I pass the clientSecret to the paymentSheet.presentWithPaymentIntent, fill out the card info for the <a href="https://stripe.com/docs/payments/accept-a-payment?platform=android#:~:text=credit%20card%20number-,4242%204242%204242%204242,-with%20any%20expiration" rel="nofollow...

How add kotlin-csv to JetPack Compose project I want to add kotlin-csv to my app but I don't know how to di it. I opened kotlin-csv and I have found that I need to add these lines to build.gradle (Module). I did it implementation 'com.github.doyaaaaaken:kotlin-csv-jvm:1.3.0' implementation 'com.github.doyaaaaaken:kotlin-csv-js:1.3.0' But I can not run my file. I have a error. import com.github.doyaaaaaken.kotlincsv.dsl.csvReader fun main(){ val csvData: String = "a,b,c\nd,e,f" val rows: List = csvReader().readAll(csvData)...

Yelp API Validation Errors(400) - Android Studio I want to do a simple experiment with the yelp api, but I'm stuck at startup and keep getting validation error. I checked and refreshed the API_key and BaseURL etc but the error persisted. MainActivity.kt private const val TAG = "MainActivity" private const val BASE_URL = "https://api.yelp.com/v3/" private const val API_KEY = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {...

Google Map. Android. Fill color outside city area I using goole map in android app. I drawed city area on the map, like this: fun fillCityPolygon(mMap: GoogleMap) { val layer = GeoJsonLayer( mMap, R.raw.city_polygon, this ) val style = layer.defaultPolygonStyle style.strokeColor = R.color.purple style.strokeWidth = 10f style.fillColor layer.addLayerToMap() } I cant understand how i can fill all area outside the city area. Like this: <a...

com.google.android.gms:play-services-ads | ERROR After update it to version 21.0.0, I get an error msg (The Val cannot reassign). implementation 'com.google.android.gms😛lay-services-ads:21.0.0' AndroidView( factory = { AdView(it).apply { adSize = AdSize.FULL_BANNER adUnitId = "ca-app-pub-....62" loadAd(AdRequest.Builder().build()) } }, )

viewmodel init fail in release apk since constructor not found I am using viewmodel in jetpack compose and build a factory like import android.content.Context import android.util.Log import androidx.lifecycle.ViewModel import androidx.lifecycle.ViewModelProvider internal class MyStateBuilder(val args: Map?, val context: Context) : ViewModelProvider.Factory { override fun create(modelClass: Class): T { try { Log.d("ppx",modelClass.constructors.size.toString()) modelClass.constructors.forEach {...

How to make Navigation Drawer with only two corner with radius Im trying to make a Navigation Drawe with only right corners with radius. My problem is that in the top of the Navigation Drawer, I have a rectangle image and it overlap the radius of the navigation drawer with a custom xml to make this border radius. How can I put this square image in top of the navigation drawer and make it fit with the border radius? Something like this but with corner radius in the navigation drawer. <a href="" rel="nofollow...

Bitmap.getColor(x, y) crashes on API 28 and below Introduction: I am running my instrumented tests of my SDK on AWS Device Farm, but I see that it crashes when I try to get the pixel color of a Bitmap (bitmap.getColor(x, y)). Problem: I test the color of different view objects, as image views, and I found a way to do it converting the view to a Bitmap and then extracting one certain pixel color. Works well on all my emulators and physical devices. Not in all AWS Device Farm devices with API 28 and below, I have tested it in a API 28 local...

Custom Android CardView Dialog Preview different I want to display a custom dialog using a cardView to display some information. The preview looks exactly like it should and is previewed in Android Studio the following: The quick_preview.xml xml for this is The dialog uses a custom class...

Stuck in Kotlin Seam Carving Stage 3/6: Look at energy I'm traing to manage the third stage of the Seam Carvinf project on the Kotlin Academy for several days, but I'm stuck. I have no idea why my output is different than the expected one. Could you help me find my mistake? InputExpected outputMy output The Instruction:...

How do I get an in-depth knowledge of android applications? I make android apps with java and Kotlin and I can get most of the information about almost any app I want to build online. I feel like all I do is read, copy and rewrite code with little tweaks. I don't totally understand what I am doing. I only use already built features and implement, extend or override methods. Is it possible to create an application from scratch without using already built methods or classes? Is it possible for me to handle things myself, like create my own...

How to (de)serialize an instance of a generated data class I need to (de)serialize to and from JSON some of the data classes that are generated by a Gradle plugin. Normally I would just use a library like Moshi or kotlinx.serialization and add the proper annotation to the class I want to serialize but, since this data classes are autogenerated, this is a problem. I would like to avoid manually to map all the fields of the generated data class to some other class that I can (de)serialize, or to write a custom adapter for all these data class so, I was...

Kotlin Paging 3 using Recycler View but List did not showing I used Paging 3 for my Recycler View that had to show some stories in the application. But while I used Paging 3, the lists did not show the item. Before I used Paging 3, the items had been showing including the details. StoriesResponseItem.kt @Entity(tableName = "story") data class StoriesResponseItem( @PrimaryKey @field:SerializedName("id") val id: String, @field:SerializedName("photoUrl") val photoUrl: String, @field:SerializedName("createdAt") val...

IntelliJ IDEA not showing decompiled bytecode I can open a .class file and get a decompiled version of method implementation code, but only for classes compiled from Java source. However, when I open a class file that was compiled from Kotlin source, I get this appearing in the decompiled class window: public final fun test(): Int { /* compiled code */ } How can I get IntelliJ (paid version) to show the compiled code for Kotlin code just as it does for Java-compiled code? Perhaps I can tell it somehow to forget it's been compiled by...

binding breaks after screen rotation I have exception "lateinit property binding has not been initialized" after screen rotation when I try call binding . How I can fix it ? My base fragment code override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?, ): View? { binding = DataBindingUtil.inflate(inflater, contentLayoutID, container, false) return binding.root }

check network state in fragment in android I defined two layers in a fragment, the display of which depends on the internet and gps on and off There is no problem when the program runs, but when I enter another fragment and return to the first fragment, the code does not work properly. onViewCreated override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) //broadcast receiver for check runtime network val registerReceiver = requireActivity().registerReceiver(...

How to publish Android library multiple module on the same repository? When i try to publish my android library with maven-publish plugin and jitpack.io, I must implement link as below, Link: 'com.github.EkremYigit😛ersonal-android-library:1.0.0' But I dont want to add all modules with single link. I want to split links as like below 'com.github.EkremYigit.RepositoryName:myLibrary:1.0.0' 'com.github.EkremYigit.RepositoryName:myLibrary2:1.0.0' How to create "single repo with multiple module library" senario, is there any guideline ? Project structure <a...

Fragment - 'on navigate back' not bahave the same way as back button I'm writing android app, using fragments. There are two main ways to navigate up or back. The first is to use the arrow on the navigation bar (marked with the number 1 in the picture) The second use the system back button (marked with the number 2) I wrote: override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View { ......

How to mock out lambda passed to .use on Closable? Given: suspend fun putS3Object( folderPath: String, emptyContent: ByteStream = ByteStream.fromBytes(ByteArray(0)), ): PutObjectResponse { val request = PutObjectRequest { bucket = bucketName key = folderPath metadata = mutableMapOf() this.body = emptyContent } try { s3ClientFactory().use { s3: S3Client -> return s3.putObject(request).also { logger.info { it } }...

GitHub Packages, Install Android library, Kotlin I successfully uploaded my package to GitHub In my project when i upload i use def getVersionName = { -> return "1.0.0" // Replace with version Name } def getArtifactId = { -> return "bruno-components" // Replace with library name ID } publishing { publications { bar(MavenPublication) { groupId 'com.bruno.components' // Replace with group ID artifactId...

I am using FusedLocation provider and I don't want my app to crash even if internet services in my phone are off. I have tried using try/catch, no use NOTE: Internet services are OFF intentionally in my phone. Getting error at the below line: addresses = geocoder.getFromLocation(latitude, longitude, 1) I don't want my application to crash even if the internet service is off and want the issue to be caught in catch block. I have implemented the try/catch block, but still my app crashed by giving the below exception: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException is there any solution for my problem. Thanks in advance.