Strange redirection to stderr with println in Kotlin I do not understand if this is intentional, but if the message in println starts with Error, the output will be redirected to stderr instead of stdout. Example: val a = "abc" println("NotError: $a") // to stdout println("Error: $a") // to stderr I didn't found mentions of this behaviour in Kotlin documentation, is this a bug, maybe?

No value for xxxxx in kotlin In my class I have data class Datum ( val id: String, val amount: Long, val transport: Long, val total: Long, val weight: Long, val payment: String, val paymentID: Any? = null, // issue (it can have string value or be null when coming from server) val paymentMethod: Any? = null, //issue (it can have string value or be null when coming from server) val accepted: Long, val customer: Customer, val laundry: Laundry, val driver: Driver, val...

when kotlin flow is called in the fragment I have Paging PagingDataAdapter(ItemDiffCallBack) in the fragment I submitData viewLifecycleOwner.lifecycleScope.launch { viewModelHome.itemsFlowF() .map { pagingData -> pagingData.map { Item(it, viewModelHome.selectedItem?.OrderWithItemsWithVoucher == it) } } .collectLatest { pagingAdapter.submitData(it)...

Android WorkManager use cases I am reading about WorkManager (https://developer.android.com/guide/background). What confuses me are the 2 conflicting statements. It says WorkManager should be used: For tasks that should be executed immediately and need continued processing For tasks that can run at any time in the future can be and deferred Can someone explain this and show me 2 simple examples with the code of WorkManger that does...

MediatorLiveData doesn't update the UI instantly, need to leave fragment and come back Basically I've bound the recyclerView to my viewmodel's MediatorLiveData, but when this data gets updated, my view doesn't - I have to leave the fragment and come back to see the results. What's the problem? private val groupsMutable = MutableLiveData() val groupsMediator = MediatorLiveData() init { groupsMediator.addSource(groupsMutable) { groupsMediator.value = groupsMutable.value } loadGroups() } private fun loadGroups() {...

Kodein Scopes, Bind database service to an activity scope I've been trying to implement a custom scope in kodein for the past day and I am about to rip my hair off. My application is built on 2 activities, one activity for login, the other when the user is logged in (I'll call it MainActivity). I have several singleton services that fetches data from a Firestore database that I use within many fragments inside my MainActivity, and I am currently using Kodein for getting my singleton objects of each service. Summary of my Service: class...

Cash State vs Fungible token in Corda Both Cash State and Fungible Token can be used to represent money in Corda. Both can be issued , transferred(move) and redeemed (exit). What is a more...

Unrecognized escape sequence in Rust but working in Kotlin [duplicate] I have the following Rust code: let new_regex = RegexBuilder::new(&source) .case_insensitive(!self.match_case.clone()) .build() .unwrap(); It fails with the following: called

Result::unwrap()

on an

Err

value: Syntax( ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ regex parse error: dd\[\]\{\}\$\%\\&\(\)d ^^ error: unrecognized escape sequence However exactly the same string is considered as valid in Kotlin: <a...

Simple Windows on the bottom of GoogleMap in AndroidStudio in Kotlin I am currently developing an android app for one of my university subjects. At this point I have a GoogleMaps map with several markers, which mark locations of interest. That doesn't really matter. I'm trying to make a windows pop up whenever I click any of the markers. The window is supposed to fill the lower third of the screen and contain informations about the marker location. I already added an OnMarkerCLickListener to the map and the onMarkerCLick()-method is called whenever I press on...

Android Room getting count of elements in an 'incoming foreign key list' in an 'embedded entity'? I have 2 Entities, Grade and Student, Student is having a foreign key towards the class room. Embedded entity ClassRoom looks like this, data class ClassRoom( @Embedded val level: ClassLevel @Relation( parentColumn = "id", entityColumn = "ClassLevel" ) val students: List, // val strength: Int ? ) I would like to have a count of students in a variable strength which is the size of students variable without querying whole list and calculating the...

Unresolved reference: databaseReference code: private fun sendData(){ databaseReference.child("messages")?. child(java.lang.String.valueOf(System.currentTimeMillis()))?. setValue(Message(mainActivityEditText.text.toString())) //clear the text mainActivityEditText.setText("") } i already added firebase to gradle and everything but this still showes up. I'm using 17.2.1 version of firebase analytics and 19.2.0 version of firebase adatabase. idk what could be the problem. I'm fairly...

What's the replacement for rememberRippleIndication in JetpackCompose 1.0.0-alpha11? In JetpackCompose 1.0.0-alpha08, the below code is legitimate, where by indication = rememberRippleIndication(...) is okay. Surface( modifier = modifier.padding(4.dp).clickable( onClick = { }, indication = rememberRippleIndication( color = color.value.rippleColor() ) ) ) { } However in 1.0.0-alpha11, the indication parameter doesn't exist anymore for clickable, and the rememberRippleIndication also doesn't exist....

Capture an image and implements on top of the photo watermark with the textviews so I have tried to work with the Bitmap and I have some difficulties with it, or maybe I have something missunderstood of the topic, so my thing is when I press the floating button and take a photo from the outside, once the photo is taken, to automatically put the textviews that is displayed into a watermark right on the top left of the screen(this is for tablet densities, not recommended for phones). If anyone have any clues on how to make it happen, please let me know. Thank you in...

Kotlin function that returns 0 for negative values and the same value for positive ones I'm a bit annoyed with the line of code below. I'm wondering if there are any build-in function in the Kotlin SDK that could do the same in a more elegant way. val result = if (value > 0) value else 0

How do i change the backgroud color of a button in kotlin I am new to kotlin programming and i can't resolve the problem that i am facing in android studio. I followed a course on youtube, and at one point the video teaches you how to build an actual app. I want to change the backgroud color of a button that i made but whatever i do, the button keeps having the color purple. I tryed this 2 methods: android:background="@android:color/white" android:background="#FFFFFF" Can you help me guys, i would be really thankful

How to use Strings.xml in ViewModel without using context in Android? We have existing app, we need to add Multiple Language Support for that app. All the strings which are accessed with String.xml are translating. but we have a constants (which are strings), which we are accessing in VewModel. these constant are not getting translate.code structure is like below Constant.kt file class Constants private constructor() { companion object { const val NAME= "Name" const val LAST_NAME= "Last name" } ViewModel looks like this VewModel.kt class...

Android ViewBinding Error: Cannot access class 'android.widget.no_name_in_PSI_3d19d79d_1ba9_4cd0_b7f5_b46aa3cd5d40' I tried to use ViewBinding in my Android Projects, because Kotlin synthetics are deprecated. I followed the official documentation from Android Developer's site. In my build.gradle.kts I enabled ViewBinding: android { ... buildFeatures { viewBinding = true } } And I tried to use it in a Fragment like: private var _binding: FragmentStartBinding? = null private val binding get() = _binding!! override fun onCreateView( inflater: LayoutInflater,...

WebViewAssetLoader shouldInterceptRequest gives undefined on properties in fragment Hello since using file:/// have been deprecated i am switching to using WebViewAssetLoader according to this documentation WebViewAssetLoader It finds my html and everything but it starts throwing Uncaught TypeError: Cannot read property 'enableFeatureSelection' of undefined -- From line 1 of http://android_asset/map.html on properties. This is done in a fragment so I don't...

Masking Character to Asterisk in kotlin using PasswordTransformationMethod How to change default masking character to asterik in textinputedittext for password field in kotlin android

Google Speech to Text does not return results I want Google Speech to text API to recognize a short phrase after I press a button. So I came up with the following code. But it keeps returning no results. I'm quite confused, there are results in there (the buffer etc.), the mic is working well and is enabled in the emulator. Google console also doesn't show errors. Here's my code. Click listener that starts the recording: val clicker: View.OnClickListener = View.OnClickListener { Log.d(TAG, "Starting record thread")...

How to define and pass Java method as an argument? I'm trying to pass the runOnUiThread method to my ServerThread: class MainActivity : AppCompatActivity() { private lateinit var serverThread: Thread override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // stuff... this.serverThread = Thread(ServerThread(runOnUiThread)) this.serverThread.start() } } class ServerThread(runOnUiThread: (() -> Unit) -> Unit) : Runnable{ override fun run() { // stuff......

Best practice for POST request I'm making a rest asp.net core with some api that i'll use with an android app later. I have some doubt about some of the database operation. Let's assume that i have in my DB a table Tickets that have columns id, title and author(this is a foreign key wich refers the User table (id - name)) Now when the android app request the list of tickets i made a select and return the id, title and the name of the author so i made a class Ticket like this: class Ticket{ private int id{get; set;} private...

RecyclerView, different ViewTypes and notifyItemMoved() causing visual glitching I have a fairly simple adapter, however the animation seems to be broken; //uses, what is effectly an array, to find out how many views to render override fun getItemCount(): Int = data.size //converts the view position to a layout id override fun getItemViewType(position: Int): Int { return data[position].type.editorLayout } //renders the view from getItemViewType() override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder { val layout =...

How to make clickable the included button inside my drawer layout? I want to click the button included inside my drawer layout. How do i make it? this is the xml file

Swagger UI, OpenAPI 3.0: UI fields for POST body? Swagger UI shows nice fields for @RequestParam. I have a POST endpoint, so I used @RequestBody. I can send a JSON and it parses into my body object. So far so good. But Swagger UI shows only a textarea, where I am supposed to put the whole JSON. Which is not too convenient. I would like Swagger UI to show individual fields for each property of the request class. The closest I found is @ParameterObject support for POST, discussed <a...

kapt in Kotlin Multiplatform - src dirs not recognized by gradle and IDE by default I have a Kotlin annotation processor library which generates some classes and writes them with FileSpec.builder(...) ... .build() .writeTo(processingEnv.filer) The generated files end up in build/generated/source/kapt/.... They are only recognized by gradle if I add kotlin.srcDir("${buildDir.absolutePath}/generated/source/kapt/") to my build.gradle.kts. It works the same way if I use kapt.kotlin.generated option - the path changes to...

Illegal argument exception while creating an app through kotlin I am experiencing this error , can someone guide me .Line 43 is this mCanvasBitmap = Bitmap.createBitmap(w,h,Bitmap.Config.ARGB_8888)

all activity code when open old project in new android studio i have some project i created in the past ( android studio 4.0 ), then when i open it again in my new android studio (4.1.2) almost whole code gone error, there is a lot red error line and i cant fix them with alt+enter, also in project structure i cant find manifest file and also can make new activity / any android resource when i press right click. i spent hours of confusing with this problem, hope somebody can help me <a href="" rel="nofollow...

How to pass Rest APILat and Long co ordinates to onMapReady() PASS RETROFIT API JSON LATITUDE and LONGITUDE to onMapReady() in Mapactivity to plot location in MAP Rest APi { "location": [ { "id": 1721, "code": "AT0104", "lat": 2.7311, "longg": 75.8893, "created_at": "2020-08-07" }, { "id": 1720, "code": "AT0104", "lat": 23.7311, "longg": 76.8893, "created_at": "2020-08-07" }, { "id": 1717, "code": "AT0104", "lat": 22.7311, "longg": 75.8893, "created_at": "2020-08-07" }, ] }

Exceptions thrown while generating a sequence I want to copy a potentially huge file from one place to another (for example, but not limited to, the local filesystem). In order to decouple the reading from the writing, my copy flow has steps to perform each task: The reading step returns a sequence of lines (the file content). This step yields every line of the file to avoid having all the file content in memory. The writing step writes the sequence of lines received from the previous step. Well, sometimes exceptions may occur when...