Kotlin create Webflux app without any MVC dependencies I want to create project using kotlin and webflux. Application starts without problems but when I run spring integration tests I'm getting an error: caused by: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'conversionServicePostProcessor' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: Cannot register bean definition [Root bean: class...

How does a extension method work in Kotlin? In Java you cannot extend a final class, but in Kotlin you can write extension method to such final classes. How did they make it work internally? I couldn't find any article that explained the inner workings of Kotlin Extension Methods.

Reactor CacheMono Kotlin lookup type problems I have a project where i use Reactor with Spring Cloud Gateway (version Hoxton.SR5) I wanted to implement a cache for data that is queried by the gateway from other services. From what i've read, the @Cacheable annotations aren't compatible with reactor 3.3, so i went to the CacheMono in combination with Caffeine. The code i'm trying to write should do a fairly simple job: Check Cache for entry If missed, query the service Create a mono After mono returns, put the value inside the cache If...

Limit infowindow width to percentage of screen or set a maxWidth I am trying to limit the width of an infowindow in Android Google Maps. I have tried setting maxWidth, however that seems to have no effect. ... Setting up the info window in the adapter: override fun getInfoWindow(marker: Marker?): View? { val view = layoutInflater.inflate(R.layout.info_window, null) ... return view }

Android Kotlin - MVVM - What is best pratices shared preferences I have three repositories. Webservice, RoomDatabase and SharedPreferences. There are many sources on the internet about the other two. But there is no source related to shared preferences. I tried to create a repository myself, but I'm sure it's not good. My project directory looks like this: SharedService Interface interface SharedService { suspend fun saveUser(string: String) suspend fun getUser() : String }...

Not able to load image from URI from registerForActivityResult() I am trying to load images from gallery and camera into the imageview using Glider. I dont know how to handle the URI. I have attached the URI which i am getting from gallery and camera Camera -> /my_images/Pictures/JPEG_20200806_213840_4160667046172070294.jpg (I can view the image in the directory) Gallery -> /document/msf:24 fun openGallery(){ val takeimageg = registerForActivityResult(ActivityResultContracts.GetContent()){ it?.also {...

How do you fix NullPointExceptions? I have been coding a social app using Kotlin. Recently I added a find friends fragment to my Main activity(Main activity has three fragments: home page, deny/accept friend request, and find friends where you can send friend requests). In addition, Main Activity has a tab layout where it is above all fragments and has a button that directs the users to a profile page. This is where the problem occurs. When I try to sign out the user using: mAuth!!.signOut()...

Dynamically generating a table with buttons using Kotlin for Android The finished goal is to be a series of buttons (currently in a table) which will hide/reveal rows containing fixed data between each. I'm not sure if my approach is feasible or optimal, and I am not attached to this method. I have little experience with Kotlin/Android, but here's an example of what a hard coded sample looks like: and my hide/show method: fun superChemical1(view: View) { val chemId = R.id.superRow1 val chemVisibility =...

Map in Kolin: returning the value of a map when it is a Class I have the following: list = listOf( Class(Event.TYPE1, Class2(State.A, State.b), Class(Event.TYPE2, Class2(State.C, State.D))) I have converted to a map: val map = = list.map { it.eventTrigger to it.transaction }.toMap() I am trying return the value of such map (Class2) when they key is and Event enum, as follows: fun hasKeyAValue( event: Event, transaction: Class2 ): Boolean = map[event]?.contains(transaction) ?: false Is it even possible to treat a Class as a...

How to parse correctly a Date in Kotlin? I am having the following error. I have a String = "2020-08-06" and I want it as Date so I can save it in my DB. So I did this: val date = "2020-07-07" val formatter = SimpleDateFormat("yyyy-MM-dd", Locale.US) formatter.parse(date) But I am getting this: Tue Jul 07 000000 GMT-03:00 2020 What I am doing wrong? Please Help! I have tried with formatter.format, but that returns a String and I want it to be a Date The type of the variable after parsing MUST be Date, not LocalDate.

Kotlin - How to automatically delete and overwrite SMS logs, contacts and photos? I'm building an Android app that will permanently delete sensitive data if it detects the device is being tampered with. Things like call logs, photos, contacts, SMS. Is it possible for an app to delete these things without root? And if so, how?

Unresolve reference I´m new in this thing, I have used a tutorial as guide, I copy everything correct from the tutorial, but when I want to run the app I can´t because the following warnings appear: Unresolved reference: isSuccesful Unresolved reference: result Unresolved reference: isSuccesful Unresolved reference: result Unresolved reference: FirebaseAuth Here´s my code: package com.mpdw55.medic_app import android.content.Intent import android.os.Bundle import android.view.View import...

Sorting in list I have list (mListCache). Which I am filling with Firebase. How do I iterate through all the sheets in mListCache and leave only those with name: B. My adapter: package ua.lujek.expiration_date.ui.fragment.Adapter import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import android.widget.TextView import androidx.recyclerview.widget.RecyclerView import com.bumptech.glide.Glide import kotlinx.android.synthetic.main.expation_item.view.* import...

How to solve "Waiting until last debugger command completes" stuck in Android Studio? My project is in Android Studio. It has around 35 thousand lines in a Windows 7. My environment is updated. I use Kotlin and not Java, but it' not important. I have lot of memory in my computer. I read all material in Internet about the message Waiting until last debugger command completes while debuggng my app in the cell phone. For me, this message is normal pace, or it stucks (hangs) completely, and sometimes is very slow. Possible workarounds that can't solve my problem. a) Erase all...

Links Activation I created an android app which is a copy of desktop website. On the website, I have more than 2000 links. And I want to activate them all in my app. I can't find any tutorial, as all tutorials are about manual link typing. I created my app in android studio using java.

Koin No definition found for class, Could not create instance I have got the crash error, it seems like Koin couldn't create an instance beacuse of something missing, but I have no idea what could it be. I have tried to find the solution in the internet but with no results. Can you help me? Below what I managed to write so far. App class App : Application() { override fun onCreate() { super.onCreate() startKoin{ androidContext(this@App) modules(moduleList) } } private val moduleList =...

Object equality vs uniqueness In my hobby Kotlin project I've run into dilema how to implement equals() method in case of a class like: // I'm using Kotlin-like syntax class ConfigurationParameter { val name: String // used for command line option, *.conf file parameter, ENV variable, ... val allowedValues: Set // the valid values of the configuration parameter val description: String // used in --help, as a comment above parameter in *.conf file, ... } Equality Now, from my POV, two objects...

Calling lifecycle.addObserver from a Kotlin abstract class I have an abstract class that implements DefaultLifecycleObserver. I'd like to call lifecycle.addObserver(this) from the init block, but it says "Leaking 'this' in constructor of non-final class MyAbstractClass". My code: abstract class MyAbstractClass(protected val activity: AppCompatActivity) : DefaultLifecycleObserver { init { activity.lifecycle.addObserver(this) } . . . } I can move this line of code to the init block of each final class that extends this abstract...

Kotlin with() scope function is marked as redundant by Android Studio Inspector I have this issue in the code "with(x)" appears sometimes in grey as it is unused, but it's being used, and when I run Inspect Code it also sometimes shows the same and sometimes don't, anyone knows why is it and how to avoid it?

I want send a filepart image with Vertx, i want replicate this case in Postman when i run the code show bad request i have put exactly key "image" and send filepart image

Android | Kotlin | PreferenceFragmentCompat overlaps BottomNavigationView I'm having trouble when displaying my preferences in my app. My layout has a BottomNavigationView, and the preferences are overlapping this navigation. I've seen similar questions here, with different solutions, but none of them are working for me. I must be missing something in how the layouts work, but I don't see it. This is my MainLayout: And this is how I load my preferences (I don't have a layout for this): class SettingsFragment : PreferenceFragmentCompat() {...

Class Method that returns Fuel HTTP Response I am new to Kotlin and Android. I am struggling with building a class that can return data after the Fuel library makes a request asynchronously. My class and the OnCreate function from the main activity are below. Whenever the function is called the request is made and the server responds correctly, however, the print method in the main activity file is never called and it never even prints the hard coded string, so some how I am not understanding how to properly return from the suspend...

Android/Kotlin: Problems when sending data with URLConnection I am trying to securely send data from an activity of my android application to a php script on a remote server. When I start the application, the application is not crashing nor am I prompted any error message in the console. However the data do not seem to be sent to the php script. I have tried to narrow down the lines where the error could occur by adding Log.d(...) commands between each line. When I run the application in debug mode, every Log.d(...) is printed to the console, so I...

Animate fragment transitions with using Navigation drawer or Toolbar menu I have a Navigation drawer and Toolbar menu where I can go to another fragment. I used this to navigate: override fun onNavigationItemSelected(item: MenuItem): Boolean { drawerLayout.close() return NavigationUI.onNavDestinationSelected( item, findNavController(R.id.navHostFragment) ) } How I can add custom animation while switching fragments? It is Answer your own question. I have faced this problem and couldn't find any answer which would work 100% well in my...

Proper way of using Thread, Volley in android studio kotlin My mind is still floating with this resources and reading of them yet I'm still dont get it. When to use Thread? can I use this for a large data fetch from the rest-api? what is the proper way to get a large data from the rest-api? I'm using volley for this scenario, and when I test it for the phones there is some cases that the progressbar in the UI stop spinning but still fetching data or the app stop responding and forcing the app close.

Accessing elements in an object Kotlin I am trying to access individual elements inside an object, which will then be displayed as part of the view. The goal is to have each element assigned to variables outside the object. My adapter private class MyCustomAdapter(list: List?, totalCount: Int): RecyclerView.Adapter() { private val listings = list; private val totalCount = totalCount; override fun getItemCount(): Int { if (listings != null) { return listings.size } return 0 } override fun...

Android Basic Stock Prediction Machine Learning Question So I'm building a simple Android app that I want to make stock market predictions with AI / ML somehow. I've never dealt with any ML so I don't really know where to start. It looks like almost all ML online is done with Python, which I do not have experience with. Ideally, there should be a pre-trained stock prediction TensorFlowLite model that I can just shove in my app, feed it some stock data, and out pops the predictions. Is there a place I can find free pre-trained models or does anyone...

Android Studio Kotlin: ArrayAdapter won't let me override the getView function When trying to build my own getView function as they did in the tutorial I followed I get this error: "Accidental override: The following declarations have the same JVM signature (getView(ILandroid/view/View;Landroid/view/ViewGroup;)Landroid/view/View;):" class MyArrayAdapter( context: Context?, resourceId: Int, items: List? ) : ArrayAdapter(context!!, resourceId, items!!) { fun getView(position: Int, convertView: View, parent: ViewGroup): View { }

How to place text at the bottom of ButtonView container (constraint layout). Android studio None of the alignment options seem to work. How to place text at the bottom of ButtonView container (constraint layout). Android studio. Please give example if possible

In Android Does multipart entity is used for download file too as I can't see any example or details description for that class I was asked to look for downloading file using MultiPartEntity in android However i searched a lot but couldn't find any solution where I can download file using MultiPartEntity. it seems it is used to upload files only. I couldn't find detail description whether it does use for download or not. so helplessly I had to ask the question on stackoverflow. If it does can anyone share a link or code snippet for the same. If it doesn't Please tell this information too. I'll be really glad. Thank...