How to get BLE ByteArray as a Hex string in Kotlin? I am relatively new to Kotlin and BLE. All i need is the Manufacturer Specific Data from a Bluetooth device. When I use 3rd party apps, I can see the raw data from the scan and it shows up as 0xFF with a value of 0x64140676071A1D0229 for example. But in my app, I get a ByteArray which looks like {5220=[B@975e5dc} for instance. How do I go from this to the Hex value I see on other apps? This is the code I use to display the data: private val scanCallback = object : ScanCallback() {...

My patch request response me 500 Internal Server Error My ViewModel function patchProfileEmailAddress fuction wants the emailAddress variable ' private fun saveUserEmailChanges(email: String?) { profileRepository.patchProfileEmailAddress(emailAddress) .onEach { when (it) { is Result.Success -> { setLoading(false) emailAddress = email updateActionState( MyProfilePersonInformationASMActionState.DismissBottomSheet)...

how many times can we call composable function in jetpack compose I need advice if I can do that or not in compose. Suppose I have A screen. Inside that I have Button. When I click on it, I am calling a api and getting the data. In this whole process I am passing UI state event i.e. IsLoading, OnSuccess and OnError. So when I press the Button the IsLoading is trigger and when I get data without any problem, I trigger OnSuccess with data. So question is When IsLoading happening I want to called A screen -> B Screen. Note:- we are standing on B screen When...

How to get diffrenet data type from Json file in android studio? How can I pull data from the following json? Model and API are below. What method should I do to see this data directly in the textview without creating an adapter? { "image": "deneme", "boxes": [ { "w": 0.2, "h": 0.1, "t": 0.1, "l": 0.2 }, { "w": 0.2, "h": 0.1, "t": 0.5, "l": 0.5 }, { "w": 0.2, "h": 0.1, "t": 0.8, "l": 0.8 } ] } Model: data class DataModel ( @SerializedName("image")...

Kotlin "None of the following functions can be called with the arguments supplied" on Fragment I'm trying to pass data from RecyclerView inside fragment to new activity, but "putExtra" displaying error like this : None of the following functions can be called with the arguments supplied Fragment.kt class NewsFragment : Fragment() { private lateinit var adapter : NewsAdapter private lateinit var recyclerView: RecyclerView private lateinit var newsArrayList : ArrayList lateinit var imageId : Array lateinit var heading : Array lateinit var news : Array...

Duplicated task error using Proguard and Dexguard together in the same build.gradle file I'm trying to use Proguard and Dexguard in the same build.gradle file (located in a android project's app module), but I'm receiving this error: Cannot add task 'collectConsumerRules' as a task with that name already exists. Does anyone know a solution for this problem?

Error when using TypeConverter with Room: Cannot figure out how to save this field into database I get this error: error: Cannot figure out how to save this field into database. You can consider adding a type converter for it. private final java.util.List stats = null; I can't figure it out. I have Added the typeconverter to the database, but still get this error. Any ideas what I do wrong? Entity: @Entity data class Detail( @PrimaryKey val id: Int, val stats: List, val types: List ){ data class Stat( val baseStat: Int, val stat: String ) }...

Jetpack Compose: force recomposition when a state changes from another activity I have two Activities: ActivityOne.kt and ActivityTwo.kt. Both of them use Jetpack Compose to display an UI. In the first one, an item (let's say, a Text) has to be shown with variable showtText is true, and hidden when it's false. I achieve this by using: @Composable fun MyUI(){ AnimatedVisibility(visible = viewModel.showText) { Text("Some text") } } My variable showText is defined in a ViewModel such as: val showText by mutableStateOf(false) That way, anytime I change...

Jetpack Compose Column Composable Alignment I'm creating a layout with Jetpack Compose and there is a column. I would like center one composable and the other to align to the bottom. Here is an image of my target screen I spent day working it out, SpaceAround and SpaceBetween didn't help. I would appreciate any help.

How to show ordered and unordered list in jetpack compose? [closed] How to show ordered and unordered list in jetpack compose like this ->

TextField is cutting text at the bottom because default padding I almost completely successfully implemented the custom search component I needed, but I have one last problem. I need my component to be only 45dp to match the designer's requirements, but at that height, due to the TextField padding, it's clipping the text on top. I leave you below a screenshot of what is happening and the code I have. Is there any way to resolve this? I'm new to Jetpack Compose and that's all I need to close this component. <a href=""...

Firestore get the document but coroutine handler was called So im using coroutine on my project, and im trying to get a firestore Document using coroutine await function. And after i got the document, the handler was called even when the job was success. Anyone can explain to me how to fix it? Here is my code : val handler = CoroutineExceptionHandler { _, exception -> CoroutineScope(Dispatchers.Main).launch { Log.e(TAG, "saveData: $exception") saveData(mActivity) } }...

How do I set my media player in android studio kotlin to work with alarm volume? I am trying to get my media player to work with the alarm volume and not media volume. I have tried this, but it is not working, any suggestions? Also, am I am looking to change the sound file at some point, can the solution be used with a variable? val mediaPlayer1 = MediaPlayer.create(context2, R.raw.geese)...

Video recorder in circle shape and play it in circle shape I am trying to implement application to record video user face in left side and right side and normal in circle shape . So I am trying to play it in circle shape(custom frame) Thanks

Requestbody with formstrin is always empty I am sending a post requst via axios axios.post("path", formData ,{ headers: { 'Content-Type': 'multipart/form-data' } }); The payload of this request contains the file content as well as the name,... But @PostMapping("path") fun importCSV(@RequestPart files: MultipartFile?) = service.someaction(files) files is always null (I am using Rest api I in Kotlin).

How to deserialize List&lt;T&gt; with jacksonObjectMapper in Kotlin I am writing a generic function to retrieve data. It fetches from redis first, if there is no cache, then fetches from supplier (database). However it returns List instead of generic type List. fun retrieveWithCaching( indices: List, cacheKeyPrefix: String, supplier: (List) -> List ): List { if (indices.isEmpty()) { return listOf() } val cacheKey = cacheKeyPrefix + indices.joinToString(",") val cached = stringRedisTemplate.opsForValue().get(cacheKey)...

Instantiating ViewModel that needs application parameter causes a render problem in a composable preview My preview of a composable is not working and displaying this render problem : java.lang.ClassCastException: class com.android.layoutlib.bridge.android.BridgeContext cannot be cast to class android.app.Application My preview code : @Preview @Composable fun MainScreenPrev() { val context = LocalContext.current val application = context.applicationContext as Application val navController = rememberNavController() val myViewModel = MyViewModel(application)...

How to access scope function's parameter name with reflection I have a scope function on the Reflect class I created; this class will try to use reflection and set the status property value to the InProgress instance. My challenge here is accessing the name of status from the reflection side so I can set the private field by name. Reflect(myExampleInstance) { on { status }.then(InProgress) } ^ Here, I have status property that I have passed to the on function. This is the reflection side: inline fun on( p: T.() -> R, ): OnGoingReflect {...

Jetpack Compose - how to adjust the padding depending on the height of another component? I have a component set with Modifier.wrapContentHeight() which height has different height depending on its content. I want to adjust other component's padding to the first component height dynamically. I tried something like this: var height = 0 val resourceContentBottomPadding = height + 16 LazyColumn( modifier = Modifier.fillMaxSize(), contentPadding = PaddingValues(start = 16.dp, end = 16.dp, bottom = height.dp), ) { /.../ }...

Android Room TypeConverter to encrypt String column optionally based on other column value Given the Entity: @Entity(tableName = "otp_tokens") data class DBEntity ( @PrimaryKey(autoGenerate = true) val id: Long, val data: String, val encryptionType: EncryptionType ) EncryptionType: enum class EncryptionType { PLAIN_TEXT, ENCRYPTED } I want to use a @TypeConverter to encrypt/decrypt the data String field when accessing the database, based on the value of the encryptionType field value. So for example if encryptionType == PLAIN_TEXT the TypeConverter should...

Kotlin RPC client Is there an RPC client/library for Kotlin/JVM? I know about gRPC, but is there another one? I am trying to write an API in Kotlin for Microsoft's AirSim simulator and the python API they provide is using the msgpack-rpc library so I thought I should do something similar.

I konow why it complies errors after adding a ? safety keyword? [I do not know it complies errors. I add a ? keyword before calling length and toLowerCase()]

How to convert string to date and then parse it to correct string output in Kotlin I get date as string from backend and now at first I need to convert it to date time and then to compare this date and current date difference in years, months, weeks, days, minutes and seconds. In JS I can do this easily with moment JS like this function extractTime(time) { return { seconds: moment().diff(time, 'seconds'), minutes: moment().diff(time, 'minutes'), hours: moment().diff(time, 'hours'), days: moment().diff(time, 'days'), weeks: moment().diff(time,...

Spring webflux javax constrains i18n not working I've made a simple reactive rest-api and now I'm trying to implement i18n for javax constraints, but it doesn't work like it does with webmvc. I created messages_en and messages_es .properties in the resources folder, added MessageSource and Validator beans from this question How to i18n a Spring RestController on java.validation constraints? but I'm still getting...

Executing query on multiple list properties I am trying to search via query stockholdersIndividual by Person that has a specific firstName or lastName matching a certain text. But at the same time, I want to ensure that the results are limited to the StockRegister with a specific reference I want to avoid using an inbuilt filter to search through the entire list to find the properties matching the input. I have tried that an it takes a very long time when there are over 10,000 records. Is there a way to do this in JPA or native query...

Execute backward query with JPA I have a query function in my repository: fun findStockholderIndividualByPersonFirstNameContainsOrPersonLastNameContains(firstName: String?, lastName: String?): MutableList? It works to some extent. However StockholderIndividual is a part of a class called Register which has attribute called reference I want to include in the query a way to say WHERE Register reference = 'XXXXX' Is this possible with JPA?

What is the best way to manage an object through a list of sequential domino operations? Let us suppose we have an Order class and a method in which some services make a sequence of operations fun doStuff(order: Order): Order { val orderByServiceA = serviceA.operationA(order: Order) val orderByServiceB = serviceB.operationB(orderByServiceA: Order) val orderByServiceC = serviceC.operationC(orderByServiceB: Order) return orderByServiceC } I create a common interface who can be implemented by the services interface IOrderService { fun operation(order: Order): Order } So the...

Ui state not working correctly in jetpack compose I am using MutableStateFlow UI State in jetpack compose. I am not getting proper flow of my UI event. In UI state there is Empty, Loading, Success and Error state. I setup a Empty state when I initialise a variable. When I am starting to call api before that I am trigger Loading state. On that basis I am triggering Success or Error event. Note: I am not adding imports and...

How to use sockets in android with kotlin? So I'm trying to use sockets in android, I've added to the manifest but I keep getting this info message I/System.out: [socket]:check permission begin! I tried with a local ftp server and I don't even see something on the server side so the connection doesn't happen at all. Here is the code (in MainActivity.onCreate() ) val connectBTN = findViewById(R.id.connectBtn) connectBTN.setOnClickListener { var con: Socket Thread { con = Socket("ftp.dlptest.com", 21) }.start() }...