Spring Boot REST API - Deserialise a query attribute with square braces with Jackson i am calling a legacy rest endpoint. There i have to deserialise a query parameter in a rest endpoint with square braces author[name]. Question: Is it possible to deserialise the attribute author name in a rest endpoint with square braces with jackson annotations (spring boot + kotlin)? @RestController class AuthorController { @GetMapping("/author/{id}") fun getAuthorFromLegacyApi(@PathVariable("id") id: Long, authorDto: AuthorDto) = ResponseEntity.ok(authorDto.name) } data class...

Android Studio - Get content with original format Is there a way I could fetch data from an excel file but keep the data in an original format such as color and font size? The issue I ran into was that some of the data are equal in value but I don't want all of them to have the same formation. I did create some conditions using an Adapter but it changes all data of the same value across the class and I don't need that.

Android Media player gives error E/MediaPlayerNative: error (1, -2147483648) when I try to play mp4 from a firestore? When I tried to play video directly from link it works. But When I am trying to play it using firestore, it is showing me "Can't play video." In logcat I am getting this error. E/MediaPlayerNative: error (1, -2147483648) E/MediaPlayer: Error (1,-2147483648) class Show_Video : AppCompatActivity() { private val mFireStore = FirebaseFirestore.getInstance() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

RecyclerView does not display data I am trying to display data from an API. Because of a HttpLoggingInterceptor, I am sure that I receive the data, but it doesn't get displayed in my recyclerview. Is there anyone that knows what I might be doing wrong? I have tried just putting a textview in the recyclerview, but even that doesn't show. I would greatly appreciate any help, thanks in advance! fragment_book_list.xml book_in_list.xml...

Reference an object in a class by using a string? I want to reference an object within this class I have below: class HerbData { object Dill { const val herbName: String = "This is Dill!" const val scientificName: String = "Anethum Graveolens" val dullThumbnail: Int = R.drawable.dill_thumbnail_attr } object Peppermint { val herbName: String = "This is Peppermint!" } } Is there anyway that I can reference the object by using a string in Kotlin? Here is somewhat what I mean:...

PendingIntent.FLAG_NO_CREATE returns null after restarting emulator a couple of times I am trying to check if the alarm I set exists by passing in the same request code and intent values I have used while setting the alarm. Now, I have set the alarm to repeat every minute. It works as it should but after a couple of restarts, it stops working. I have used the following code to check if the alarm of interest exists: val alarmExists = getPendingIntent( id, intent,...

how to populate intermediate table in Android I have two tables with a many-to-many relationship. So I created an intermediate table, but I can't find a way to populate this table correctly because I can't set a correct list from my data. I have a list of 'courses' : each 'course' can have one or several categories. So my table looks like this : |idcourses|title|date|categories| |----|----|----|----| |700|title1|01012021|[54]| |701|title2|01022021|[54]| |702|title3|01032021|[48]| |868|title4|01042021|[47, 52, 54]| If I try a map like...

How to enable notifications on exactly 2 characteristics in Android? I want to be able to receive notifications on exactly 2 characteristics. Said characteristics are RX and TX from the perspective of the BLE device I am communicating with. I have succeeded in doing it for the RX, but apparently I need to do the same for the TX. override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) { with(gatt) { if (status == BluetoothGatt.GATT_SUCCESS) { val services = gatt.services Timber.w("Discovered...

MPAndroid: make visible data match chart height Using MPAndroid to display line chart which user can scale horizontally but not vertically. When the chart is scolled or zoomed, I would like it automatically scaled vertically for the data to match chart height. I had a solution in mind to achieve that by calculating the min/max values of visible data and then calling setVisibleYRange: chart.onChartGestureListener = object : OnChartGestureListener{ override fun onChartTranslate( me: MotionEvent?, dX: Float, dY: Float, ) {...

Compose plugin creates only Dmg distribution I have desktop app written with compose, I am workinkg on Mac. Everything works fine for mac builds, but I am unable to produce one for linux. dependencies { implementation(compose.desktop.linux_x64) implementation(compose.desktop.macos_x64) [...] } compose.desktop { application { mainClass = "pl.rtsm.myapp.ApplicationKt" jvmArgs += listOf("-Xmx12G") nativeDistributions { targetFormats(TargetFormat.Deb, TargetFormat.Dmg)...

Room database not prepopulating on one phone, but it does on another I have an application which uses android's room database, and it worked perfectly fine on my physical phone. However, at some point no data was prepopulating tha database on installation. I tried the same thing with both another physical phone and with the emulator and it works perfectly. Any clues on what is happening? (Database is created, and I can insert, read and delete afterwards)

Flutter Facebook App Events gives the error: kotlin.UninitializedPropertyAccessException: lateinit property appEventsLogger has not been initialized I am using the latest version of FaceBook App Events plugin in Flutter with the latest version of Flutter as well. On click event, I am calling the logEvent method like this: facebookAppEvents.logEvent( name: 'Link Clicked', parameters: {'url': request.url}, ); where the facebookAppEvents defined and initialized in the class itself: static final facebookAppEvents = FacebookAppEvents(); Advertiser...

Get only month(in short) and date in kotlin i have some date in "yyyy-MM-dd HHmmss.S" format and want to get just the month and date. How can i format it in kotlin?

Android RecyclerView different Item of files I'm facing some issues with recyclerView. I have an upload button in recyclerView. With on click of that button, I upload a file it can be png, pdf, or Word file. Now I show png in ImageView but how to show that pdf and word file? And the second issue is that after uploading all files how do post all files in the rest API?

retrieve data from Firebase in search fragment App crashes anytime I type in search fragment to retrieve data from firebase Fragments.SearchFragment$searchUser$1.onDataChange(SearchFragment.kt:115) user = dataSnapshot.getValue(User::class.java)

Display asset text file in Composable function using Kotlin Jetpack Compose I'm trying to read a text file using Kotlin from my Assets folder and display it to a Compose text widget. Android Studio Arctic Fox 2020.3 The following code runs successfully and displays the text file to the Output console, however I can't figure out how to get the text file and pass it to a Compose text widget. You'll notice that I have 2 text() calls inside ReadDataFile(). The first text() is outside of try{} and it works fine, but the text() inside the try{} causes an error: "Try...

am trying to implement facebook login with flutter, but am getting these errors am having these errors after implementing facebook login in flutter. my code cant execute e: C:/Users/HP/.gradle/caches/transforms-2/files-2.1/0c02c09b68f8e9b24bbbea025e769c0c/jetified-facebook-core-12.2.0-api.jar!/META-INF/facebook-core_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15. e:...

what is difference between setForeground and setForegroundAsync in kotlin Hey I am working in WorkManager. My code is running in android 11 and below . I want to support WorkManager for sdk 31(android 12). I am reading doc and it confused for my scenario Backwards compatibility and foreground services. I am adding code please have a look and guide me is my code doing right? NotificationWorker.kt class...

Check if user exists in room databse through id I want to keep the app scanning for qr codes if it doesnt match the userId.. So my question is, how can I check if a user already exists in my room db? @Query("select * from user_table where id= :id") fun getUserById(id: Int) : User I previously tried this, because I could need the user object in return by the function. But it only return a Kotlin.Unit val currentuser = mUserViewModel.getUserById(sId)

How to implement Pagination with Ktor and Kmongo Problem: To Implement Pagination on the server side using Ktor and Kmongo. Tech Stacks: Kotlin as Programming Language. Ktor as Web Framework. MongoDb as database. Kmongo as Sql framework. I cannot find any tutorial or posts that describes to implement pagination with Database in Ktor.

null cannot be cast to non-null Getting this error: java.lang.NullPointerException: null cannot be cast to non-null type java.lang.String at com.example.newsorgapi.MainActivity$onCreateOptionsMenu$1.onQueryTextChange at line: if(it.description.lowercase(Locale.getDefault()).contains(searchtext)) override fun onCreateOptionsMenu(menu: Menu): Boolean { menuInflater.inflate(R.menu.menuitems, menu) val item = menu.findItem(R.id.search) val searchView: SearchView? = item?.actionView as? SearchView...

How to insert batch and return inserted values + values from linked table? I have the next SQL-query in plain SQL for PostgreSQL using JDBC: fun addMessages(newMessages: List): List { val args = List(newMessages.size) { "(?,?)" }.joinToString(",") val sql = """ WITH msg_list AS ( INSERT INTO messages(msg, created_by) VALUES $args RETURNING id, msg, created_by ) SELECT m.id, m.msg, m.created_by, u.id, u.name, u.email FROM msg_list m INNER JOIN users u on u.id = m.created_by """ val statement =...

Text style isn't applied when changing the text from the code Android Studio I want to change the text from the code when a certain condition is met. My string from strings.xml: This part is bold and this part is italic When I use this string directly in an xml file like: android:text="@string/my_string" the output is: This part is bold and this part is italic When I access the string source from my codes like: binding.textOne.text = resources.getString(R.string.my_string) the output is: This part is bold and this part is italic I want to preserve the styles that...

why doesn't layoutInflater work in class level in android from kotlin? I discover something strange in android studio while write a code. that is layoutInflater doesn't work in class out of method. if i write a the following code and run it, app doesn't work. why does this phenomenon happen? package com.example.myapplication import androidx.appcompat.app.AppCompatActivity import android.os.Bundle class MainActivity : AppCompatActivity() { val li = layoutInflater override fun onCreate(savedInstanceState: Bundle?) {...

How to .collectAsState() from a StateFlow using repeatOnLifeCycle() in a @Composable? I'm trying to follow the official guidelines to migrate from LiveData to Flow/StateFlow with Compose, as per these articles: https://medium.com/androiddevelopers/a-safer-way-to-collect-flows-from-android-uis-23080b1f8bda <a href="https://medium.com/androiddevelopers/migrating-from-livedata-to-kotlins-flow-379292f419fb" rel="nofollow...

Saved instance of image in kotlin Frag1 has two images, when I switch from Frag1 to Frag2, and then come back to Frag1, uploaded img is lost. How can I save the image. I'm using Navigation component in kotlin.

How to detect if the user stops writing to a TextField? I have a screen with Jetpack Compose in which I have a TextField for the user to write a text. With this text I will make a query to obtain data. I want this query to be made when the user finishes typing. Is there a way to know if the user takes 2 seconds without writing (for example) to launch this query?

How to hide the icons and only show the back button in the toolbar using navigation component? I have a single activity app with multiple fragments and by using the navigation components I can navigate between them. On my Activity, I have a toolbar with a menu and nav controller. The toolbar icons are shown in every fragment in my app and in one of the fragments, I want to show only the back button without the rest of the icons. How do I possibly do that?. Thanks in advance.. You can use java or kotlin I understand them both My Main Activity private lateinit var navController :...

How about "this" as a type? I will simplify the problem that got me to this point, but I was thinking about this block of code : abstract class A { fun myCustomApply(block: A.() -> Unit): A { this.block() // block() would have the same effect // Do something else here return this } } class B : A() { fun anotherFunction() { // Do something } } This code looks (and is) ok. But consider the following snippet : fun doSomethingVeryUseful(): B /* Won't work */ { val b =...

Android studio request permissions code is wrong pls hlp I am working with the Kotlin language in android studio. I am requesting permission to access the gallery and I am writing this when I use the "if-else" structure to query the permission and there is a dash above the requestPermissions statement. how do we solve this. activity?.let { if (ContextCompat.checkSelfPermission(requireActivity().applicationContext,Manifest.permission.READ_EXTERNAL_STORAGE)!=...