Duplicate code due to different list objects So I got a function in each of my classes which does the same but with diffrent objects in the list, for example I got the methode for Streets and HouseNumbers. Here the example of the two nearly identical functions, first for Streets: fun batchInsert(import: List, source: String) { var part : MutableList = mutableListOf() for(i in import) { part.add(i) if(part.size % 25000 == 0) { batchUpdate(part, source) part = mutableListOf()...

How to make a slide up in android studio (kotlin) I don't know how to write code like this in kotlin

How slow is using reflection for an event bus in a Kotlin application and why? I'm creating an event system for my Kotlin application. I imagined it like the one in the SpigotAPI, so I have created an @EventHandler annotation, an EventBus and Event classes, and a Listener interface. So basically I implement the Listener interface and I create as many methods as I want and I tag them using the @EventHandler annotation. These methods must accept one parameter that extends the Event...

Instead of a symbol, it supplies a question mark in Apache POI I want to write 🇺🇿, 🇦🇱 or the same country symbols, but when I open *.docx file created by code, there two question symbols 🇺🇿 - "\uD83C\uDDFA\uD83C\uDDFF" Other symbols also so. For example 📆, 📦 My code : override fun write(file: File, strings: List): Boolean { val document = XWPFDocument() val out = FileOutputStream(file) val paragraph = document.createParagraph() strings.forEach {...

How to make conditional query with room? So I want to make a query which returns all object if parameter null or makes a where when there is a parameter. I found this: @Query("SELECT * FROM cars_table WHERE color = CASE WHEN :color IS NULL THEN color ELSE :color END") fun getAllCars(color: String?): MutableLiveData I got "Incremental annotation processing..." warning at the beginning of getAllCars. When I do what I've found here: <a...

Andoid development with kotlin Hi I'm new to android development and Kotlin language and I don't know what the order to learn staff what should I do first ? Learn Kotlin language first and then learn how to use it to build andoid apps second or what ? and what tools are being used or language take ease on me I'm still newbie

Creating Image view with selection hope someone can point me in the right direction. 1. I’m trying to make (activity) where "user" can make own selection/bag. Selection can be added by editing name and that will appear in top left corner via scroll down menu. 2. When new activity is created "user" can perform selection of his fav fruit and veg by clicking on them. They will then appear in top view called "Selected". Can someone help me to understand where should I look to archive such a outcome please? At the moment I’m...

mutable list not adding elements in for loop (kotlin) I'm new to android dev and i'm not able to figure out why the mutable lists priceHigh, priceLow, dateList are still null even after adding values to them from my json object response, i have tried this with ArrayDeque and got same result, i've tried adding the elements outside the loop and they get appended into the lists but when i add them from the response to my list in the loop it does not get added into the list and i don't know why or how to fix it. Thanks in advance `...

Unable to instantiate fragment: could not find Fragment constructor when Device Language changed Every time when I open my app, then put the app in background, then navigate to device settings and change the language, when I relaunch the app from background it crashes and I got this error: Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.eschbachit.citylinemobile.activities.chart.charts_page.LineChartFragment: could not find Fragment constructor In this fragment I'm using childFragmentManager for nested fragments. This is my...

NSScanner scanHexInt equivalent in Kotlin Here is ObjectiveC code (which I'm supposed to translate to Kotlin) - (uint8_t)byteFromString:(NSString *)string { NSScanner *scanner = [NSScanner scannerWithString:string]; uint8_t byte = 0; unsigned int value = 0; if ([scanner scanHexInt:&value]) { //

Klint and spotless: com.pinterest.ktlint.core.ParseException: Expecting a parameter declaration I'm getting weird exception when trying to run ./gradlew spotlessApply on my project in Kotlin. Class causing the problem: import io.realm.RealmObject import io.realm.annotations.PrimaryKey open class CurrentFluttering( @PrimaryKey var id: Long = 0, var currentCoinsHeap: Int = 0, var currentEarnedCoins: Int = 0, var startTime: Long = 0, var pauseTime: Long = 0, var time: Long = 0, var firstCycle: Boolean = true, var inBackground: Boolean = false, var...

can't use id.setonclicklistener in activity main I dont have any experience in android but my final year project demands me to build an android application. So the problem I am facing is that I cant use id.setOnClickListener in main activity of my android studio project. What I am trying to do is link a new fragment to my main screen using a button. I was watching a video tutorial and in that video he simply named the button id and went on to main activity and put the id there like this: [enter image description here][1] And whats...

An issue with Buttons How do I make a Button so that when I put part of it out of bounds the program doesn't just cut the parts of it that aren't inbound. What I mean is this.This is a rotating view, the rectangles are rotating around the circle, but since I put 2 of the buttons partially out of bound their parts get cut off. Is there a quick fix for this? (If programmatical fix is necessary I am writing in Kotlin)

My app has built and installed but stops working THIS IS THE ERROR WHICH I RECEIVED WHILE CHECKING LOGCAT. KINDLY HELP. 2021-01-19 183840.819 3869-3869/com.example.newsfresh E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.newsfresh, PID: 3869 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.newsfresh/com.example.newsfresh.MainActivity}: kotlin.UninitializedPropertyAccessException: lateinit property madapter has not been initialized at...

Menu not requesting on the second time I tried debugging my code but i realized there is some cache problem because in the first time the menu is requested, it maintains but it doesn't do again when the activity is updated. @Singleton class WwMenuRepository @Inject constructor(private val api: ApiInterface, private val gson: Gson, private val applicationPreferences: ApplicationPreferences,...

SMS verification code request failed when authenticating using Firebase Auth When authenticating using Firebase Auth, I want to auto input the code that is received via SMS. I am able to receive SMS and go through auth process manually, but when I use SmsRetriever, the app crashes and then the bottom sheet dialog shows up. This is everything that that appears in Logcat: E/FirebaseAuth: [SmsRetrieverHelper] SMS verification code request failed: unknown status code: 17010 null Code in Fragment where user inputs their phone number: private val SMS_CONSENT_REQUEST = 2 //...

How to insert data in Room using Kotlin? I've made my first database in Room using kotlin, i have an insert in my DAO, but when i'm trying to use it in my fragment i get the following error: Cannot access database on the main thread since it may potentially lock the UI for a long period of time. How should i do the insert at this point correctly? The insert is made when the user add data in two edittext and press confirm so i cast the insert in that onClick... Here is how my DAO looks like: @Dao interface ArticoliDAO {...

Opening bean declared in Configuration class Recently I encountered strange problem with Spring, Kotlin and Spock. I have very simple project (spring-boot, spring-web). I have one Controller with few Beans injected to this Controller. Everything works just fine. Problem is in test. I am not able to mock any of those Beans. kotlin-spring/kotlin-allopen does not add open signature to beans defined in Configuration class. On the other hand if I change this declaration to @Component everything works fine. Here is my build.gradle.kts plugin...

Recyclerview items not covering entire screen I am struggling with a bug for a couple of days. For some reason, my recycler view items don't cover the entire screen. Here is the code : feed_fragment.xml item_feed.xml In the design tab, everything looks fine : <a...

How to get a function reference using reflection in Kotlin Let's suppose I have class X with a method Y of which we will know the name only at runtime, how can I get a reference to it using reflection? Something like: class X{ fun Y(){ } } I want to able to store the method Y in a variable and call it when needed. I tried with X:class.java:getMethod('Y').kotlinFunction but then I will need to have an instance of such method to be able to call it, so it doesn't make any sense

How should i use ViewModel in two fragments? I have an app with one activity and two fragments, in the first fragment i should be able to insert data to the database, in the second i should be able to see the added items in a recyclerView. So i've made the Batabase, my RecyclerView Adapter and the ViewModel, the issue is now how sould i manage all that? Should i initialize the ViewHolder in the activity and call it in some way from the fragment to use the insert? Should i initialize the ViewHolder twice in both fragments? My code looks...

Is it possible to open existing SQL Database file (.db) with SQLDelight? On our project we are just trying to start using Kotlin Multiplatform module containing SQLDelight Database library. We get an updated SQL (.db) file from backend every 2 minutes. What we need is always replace the deprecated file and open the new one via SQLDelight to use it as read only DB. But I am wondering if it is even possible to open SQL database with SQLDelight programatically... Do you guys have any experience with this?

Lint error with snackbar extension function I have the following extension function to reduce a bit the code and to avoid forgetting the duration when showing a snackbar: fun Fragment.showSnackbar(text: String, length: Int = Snackbar.LENGTH_SHORT) { view?.run { Snackbar.make(this, text, length).show() } } But the lint is giving me the following error: Error: Must be one of: BaseTransientBottomBar.LENGTH_INDEFINITE, BaseTransientBottomBar.LENGTH_SHORT, BaseTransientBottomBar.LENGTH_LONG or value must be ≥ 1 (was -1)...

How to check inside a fragment if device language has been changed while the app was running in background? I'm trying to refresh the activity inside a fragment when the device language is changed and app is running in background. I created this method to recreate the activity but I don't know when to call this method and how to check if the language has been changed. private fun recreateActivity() { val intent = activity!!.intent intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION) activity!!.finish() activity!!.overridePendingTransition(0, 0) startActivity(intent)...

How do I connect iOS device to android device via bluetooth programmatically I am working on the application where I want to connect and communicate with my applications installed in iOS as well as android device. Is there any way to achieve it?

Android spinner item cannot be selected when not creating from resource I am using kotlin and android 8.0, I have 2 spinners in my code, 1 of them was created using a string array from resource and another was created with an ArrayList. For the spinner that was created with an ArrayList, when clicking on the item, it does not run the OnItemSelected function and does not update the spinner. Here is my kotlin code for the spinner val moduleCodeSpinner: Spinner = findViewById(R.id.module_code) moduleCodeSpinner.onItemSelectedListener = object :...

Ktor Request Already Consumed Exception I have a post request from an Android client via Retrofit. Ktor performs the necessary functions as expected for that post request but throws this error io.ktor.request.RequestAlreadyConsumedException: Request body has been already consumed (received) I am positive that the request body is not being consumed twice but this error still gets thrown Here is my code route("/followThePerson") { post { val uid = call.request.header(FIRE_AUTH_UID_KEY)!! val authToken =...

How to resolve conflict in kotlin libraries when creating gradle plugin in kotlin Trying to create a plugin using latest kotlin version 1.4.21 so it conflicts with 1.3.72 bundled in gradle, when I build it complains with log below, is there a way for me to exclude the kotlin libs bundled in gradle?: w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath: C:/Users/xxx/.gradle/wrapper/dists/gradle-6.7-bin/efvqh8uyq79v2n7rcncuhu9sv/gradle-6.7/lib/kotlin-stdlib-1.3.72.jar (version 1.3)...

How to overcome RealmMigrationNeededException error on android app When I click on launcher icon of my android app, its crashes immediately. I check logcat error, its shows Migration is required due to the following errors: - Property 'PrintJobData.jobPageCount' has been removed.I'm using Realm database and language is kotlin. How to overcome this issue. private val realmConfig: RealmConfiguration = RealmConfiguration.Builder() .name("database.realm") // .deleteRealmIfMigrationNeeded() .schemaVersion(1) .build() private...

Service are not launching (micro services) depending of the intellij version I have a really weird problem with intellij version. I have exactly the same project between 2 differents version of intellij and it is working for one(2019.3.5) but not for the last one(2020.3.1) Community edition. Here is the code which launch all my services : val availableServices = ServiceLoader.load(SomeService::class.java).map { it.name to it }.toMap() val servicesWithConfiguration = config.services.flatMap { (serviceName, serviceDeployement) -> when (val serviceInstance =...