Kotlin spring boot validation does not work When i do a POST request to /register with user with null email, i expect it to say something "hey, you have null in email field", but it throws NPE on saving step because of user.email!! statement. When i send json with wrong email like this: { "email": "wrongEmailAddress", "username": "username", "phoneNumber": "+7 909 909 9009", "password": "234adfg24", "role": "USER" } it perfectly passes through this constraint annotation: @Email @Pattern(regexp = ".+@.+\\..+", message =...

X axis vs Y axis Kotlin I drew a perfect large square in canvas and then split that large square into 15 smaller square. Now I am moving a bitmap using an image along X and Y Axis. The bitmap is of same size as the smaller square. It moves along X axes perfectly one square at a time. But it covers more than one square along Y axes. So I have multiply by approximately 0.93 to get to the size of the smaller square. But the problem is that it gets more complicated with different devices cellphone vs tablet. Does...

How to make android application with linux shell(terminal) in Android studio Can someone help me, how can i create a mobile app, with linux terminal (shelll) using Android Studio? For example i want to press button in my terminal window in app and run command ls and i would get list of directory. Example app - QPython 3L. Link: https://play.google.com/store/apps/details?id=org.qpython.qpy3&hl=ru P.S if you know russian language, please give me answer on this...

Inject abstract class (base activity) with HILT I just begin to try to use Hilt on my very simple project. For now it was all on Dagger2 but I would like to migrate to Hilt. I have an activity : @AndroidEntryPoint class MainActivity : BaseActivity() { // SOME STUFF } And a BaseActivity like this : abstract class BaseActivity : AppCompatActivity() { // SOME STUFF } Also, I have a class using the baseActivity to display a dialog. For example : @FragmentScoped class TestComponentImpl @Inject constructor( private val...

Is there a way to generate a QR code using a kotlin class and then parse it back to kotlin upon scan? I want to create and android app which will need to generate a QR code using some information about the user and then upon scanning this QR code, a Kotlin data class containing all the stored information should be generated for my app to process. Is there any API for that OR any algorithm to do this?

Pass values as parameters if not null or empty Kotlin I have text values I retrieve from text inputs. I want to allow the user to not fill in these inputs. But if the user has not filled one or more values I want to display default values for these inputs. I have a data class that looks something like this: @Parcelize data class Profile( val firstName: String = "", val lastName: String = "", val description: String = "", val imageUri: String = "" ) : Parcelable On click I call a method from my ViewModel class and pass it the...

Map java Enum to Kotlin data class I am making a call from service A which is in Kotlin to service B which is in Java. It return me an object which contains multiple fields. One of the fields returned in the Java object is an enum. In my kotlin code I have defined a DTO which maps the returned response to kotlin. I need to map this enum to a string value in kotlin. DTO in Java: public class PersonDTO { private Long id; private String name; private CountryCode countryCode; } The CountryCode is an enum. Data class in...

Slow fragment accessing using SharedFragment with `by activityViewModels`? So, I was told by someone to use shared view model previously in my another question (How do I store a data from a fragment so it can be reuse in a MVVM architecture?) The code below is not using a shared view model and it is faster package io.github.andraantariksa.cratesio.ui import android.os.Bundle import android.view.LayoutInflater import...

Pass class as Intent? I get this error when I run the code error: None of the following functions can be called with the arguments supplied: I'm trying to pass a class in intent. How can I do it? val intent = Intent(activity, Activity::class.java) private var myClass: Class? = null var aClass: Class? = null intent.putExtra(aClass, myClass)

SwipeStack initialization in Android app with data from Cloud Firestore I'm new with Android (I've got some experience in Java Spring) and I have a problem with filling a 'link.fls.swipestack.SwipeStack' view with a data that is recieved from Google's Firestore data base. A fragment with the SwipeStack starts before the list with the data is recieved from the data base. Thus the list can't be passed to a SwipeStack adapter on time. How can I handle this issue? class MyViewModel(private val repository: Repository) : ViewModel() { var wordsListLiveData:...

In Kotlin Intent exception - 'java.lang.String android.content.Context.getPackageName()' on a null object reference I am working with Kotlin class. Any help or knowledge would be greatly appreciated! Thanks! :) This is Kotlin class I'm using. If phoneNumber is empty Login Activit should open. class UserData{ private var contex:Context?=null private var sharedRef:SharedPreferences?=null constructor(context:Context){ this.contex = contex this.sharedRef = context.getSharedPreferences("userData", Context.MODE_PRIVATE) } fun loadPhoneNumber(): String? { val...

How to get a value from template string map in Kotlin Is there any way to get a value from template string map in kotlin? below is example map string example: var data = """{ "name": "xyz" "id" 10 }""" I want to modify name dynamically in program

Set custom tick intervals in seekbar I have a seekbar in my android application and would like to set it with custom intervals, such as: 10, 20, 50, 75, 100, 110 etc. But when I create my seekbar and set the min and max values, it automatically creates default intervals. My question is, how can I have my seekbar have custom intervals at their tick marks based on those values? Those values are read in from an integer array. The seekbar displays the max and the min values from the array, but not the values in between. Here is my...

Checking internet connection with Work Manager I've been searching through the internet to find some new examples of checking internet connection with Work Manager from jetpack library, but haven't found anything on that topic. Can you share with me a simple example of how can that be achieved, because using broadcast receiver for that purpose is bad cuz it's deprecated on devices above N version? I just want to be able to get information from work manager every time device is online/offline.

Does not load the remaining data from the json file I get data from json: https://raw.githubusercontent.com/rolling-scopes-school/rs.android.task.6/master/data/data.json The Interface API Request: interface ApiInterface { @GET fun getItems(@Url url: String): Call } The model: data class GitResponse(val channel: Channel) data class Channel(val item: List) The adapter is: class MyAdapter(val items: List):...

Get Missing Fields When HttpMessageNotReadableException occurs I have an API that expects the below dto structure. data class SignupRequest( @NotEmpty(message ="Username must not be empty") @NotNull(message = "Username must not be null") val username: String, @NotEmpty(message ="Password must not be empty") @NotNull(message = "Password must not be null") val password: String, @NotEmpty(message ="Email must not be empty") @NotNull(message = "Email must not be null") val email: String ) Below is the controller...

Specify query hints for SimpleJpaRepository find methods Goal I'm implementing a custom base repository with the goal of being able to specify attribute nodes of entity graphs by method argument instead of method annotation. So instead of having annotated methods like @EntityGraph(attributePaths = ["enrollments"]) fun findByIdFetchingEnrollments(id: Long): Optional in my repositories, I just have a base repository with a method like fun findById(id: ID, vararg attributeNodes: String): Optional which gives a lot of flexibility because with only...

Android - Where should we put the additional business logic in architecture? All examples in Android architecture are about taking data over the Internet and saving it to the database. I know how to implement this architecture. But I couldn't figure out exactly where to put some events. Example: Getting camera permission Save the photo to the gallery. Turn off notifications Which layer do these events belong to? Is it correct to use usecases as in the picture? There are many stages of saving the image to the gallery (permission, storage control, image extension ...)....

SubArray won't display values I created an int subArray from another int array, and when I use the following code to set those values as text values in a seekbar: Timber.d("TICK TEXT VALUES: -> ${arrayOf(subArray.contentToString())}") mySeekBar.customTickTexts(arrayOf(subArray.contentToString())) customTickTexts accepts a string array as an argument. I get the following result: [Ljava.lang.String;@b23e68c But when I print the sub-array it does print the subArray Timber.d("SUB-ARRAY-> ${subArray.contentToString()}")...

How I reached `index.mapping.total_fields.limit`? I am loading data to Elasticsearch and I've got index.mapping.total_fields.limit. I totally don't understand why I've got this error, my class which I am loading to ES looks like: @Document(type = "article", indexName = "data") data class Product( @Id val id: String? = null, val category: String, val name: String, val imagesUrls: List, val parameters: Map? ) I added already around 3k of products, after that I got this error. Can you explain to...

One Time work request does not run as expected in Oppo A3s I have a one time work request which calls itself at the end of doWork() so as to mimic a Listenable worker. When I close my app, this runs for every 5 mins (set as an initial delay while building the work request). But after some time, it does not run as frequent as it did. Even when the app is up or when I have a foreground notification and the app is still in the recents screen. I read articles that Chinese OEMS have this problem and the only solution is to white list the app. I am getting...

Assign ID to View with variable I am creating a table for my app where the user can add rows himself, the individual TextView elements will be clickable and open up a menu. But to do so i need the Ids of the elements. I need to assign them with variables, so i dont have a limited amount of rows. I also already found this solution, which works with a variable: newText.setId(resources.getIdentifier("A$Row$Column", "id", this.packageName)) but this does always set the Id to 0

Dynamically (at Runtime) Calling The iterator Operator Function Of An Array When attempting to dynamically (reflection) call the iterator function of an array type @Test fun test_x() { val array: Array = arrayOf("A", "B") val f: KFunction = array::class.memberFunctions.filter { it.name == "iterator" && it.isOperator }.first() KotlinReflectionUtils.functionJsonInfo(f).printJson() val result = f.call(array) println(result) } KotlinReflectionUtils.functionJsonInfo(f).printJson() is a debug line with the following...

How to keep imageView going offscreen [Kotlin] So I am new to Kotlin and I am trying to make a super simple app. All it does is when I click Right button it goes right same with left button. The problem is that when I click either button (e.g right button) I can click it until the image goes completely offscreen. So how can I implement a code that once it hits the edge off the screen it stops moving ? My code ` package com.example.change_position_circle import android.animation.ObjectAnimator import...

Android: Linking to URL in Navigation Drawer I am using the Navigation Components library for my Navigation Drawer. I want one item in said drawer to link to an external Website. The offical documentation doesn't say anything about external links. How do I implement that? I could create a temporary fragment and navigate to that first but this solution is not very elegant in my opinion.

Android - How to turn on speakerphone and max volume for phone call I thought that I could turn on speakerphone and set the volume to maximum within PhoneStateListener, but I can't get it to work when I test it. I am using AudioManager to try to turn on the speakerphone and set the volume. Is this not the correct way to do it? Why does the following code fail to enable speakerphone? class PlaceCall : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { ... val telephonyManager =...

BottomSheetDialogFragment is not open, small white bar only show I have created BottomSheetDialogFragment and access into my fragment but it not open fully, it shows only small bar in bottom like below I am using default BottomSheetDialogFragment file without changing anything. xml Show call function val addBottomDialogFragment: SettingFragment = SettingFragment.newInstance(10) addBottomDialogFragment.show( supportFragmentManager, "tag" )

How to get a List of Objects from a List I have a class with two members, class Class2(var obj2: SomeObject, var time: Long) {} and I have in the main Class an object defined like this: var obj: ArrayList = arrayListOf() now I've realized I need to work with an ArrayList formed only with the obj2 got from the object obj, it means: var subobj = ArrayList //extracted from obj I know I can get that with until(i in 0..obj.size) {//etc} But, is there any more practical way? (in Kotlin)

Ideas for simplified linkedlist Implementation in Kotlin I want to implement something like a linkedlist in Kotlin. What I want is the ability to append more elements at the beginning or end of the list later on. I read that in java, there is unshift and push for doing this? But I couldnt find the equivalent ones in Kotlin. I dont need the ability to delete elements from the list. If at all I have to delete, I would delete the whole list. Kotlin experts, please let me know what is a good option for this. Thanks.

Koin module unresolved reference I have all my classes that I would like to inject in a modules.kt class as such. class modules { val myModule = module { MainActivityViewModel() single { MyRepo() } } } I have an Application class that looks like this, which is declared in the manifest. class MyApplication : Application() { override fun onCreate() { super.onCreate() // start Koin! startKoin { // declare used Android context...