Serialising to Enum in Kotlin? I am writing an android app as an ios developer, and struggling to get my Enum values to encode with kotlin. I currently have data class Context( val context_type: ContextType ) enum class ContextType { WALKING, STATIONARY } the Json looks like this "context": [{ "context_type": "walking" }] However it doesnt seem to serialise the values to an enum and is just null. It crashes on attempt to access with: java.lang.NullPointerException: Attempt to invoke virtual method...

Parse json response without key - Android How to parse this type of JSON response { "translationsLatestUpdate": "2022/05/30 06:07:05", "translations": { "S40_BottomNavigationShoppingListTitle": { "en": "Home", "da": "Indkøbsliste", "de": "Einkaufsliste", "pl": "Lista Zakupów", "zu": "S40_BottomNavigationShoppingListTitle" }, "S40_BottomNavigationScanTitle": { "en": "Check the price", "da": "Scan", "de": "Preis Scanner", "pl": "Sprawdź Cenę", "zu": "S40_BottomNavigationScanTitle" }, ... } } There is no key defined. as the values for...

I'm using CallBackFlow to return result whenever it is available but it shows error Android Kotlin I'm trying to return result from function using CallBackFlow but getting error, private fun callSocket( eventEmmit: String, eventOn: String, request: JSONObject ) = callbackFlow { try { if (socket.connected()) { var response: JSONObject Log.e("EMIT $eventEmmit", JSONObject(Gson().toJson(request)).toString()) socket.on( eventOn ) {...

Live Date vs State Flow:observing vs collecting let's assume we have two Activities(A and B), when navigate from A(that has live data or flow) -> B then navigate back from B -> A. if we observe using live data : live data will not observe the data again. if we use collecting flow using repeatOnLifeCycle Api or(flowWithLifecycle) : to achieve Live data scenario we use Lifecycle.State.STARTED, but that will be different from live data when we navigate from A -> B then navigate back from B -> A , the flow is re-collecting . if some one...

Heterogeneous Views with unknow EditText number I'm working on a dynamicViews (not sure if that's the right word for creating a view from a json file). I'm getting the schema from a JSON file, I've stepped up the recycleView and its adapter, so far so good, each Recycleview item (must or not) contain a number of EditText whose number is unknown in advance, so based on the Json file, I have to inflate inside. I searched a lot but the similar solution I found for Heterogene Recycleview: the idea was to use separate layout and inflate each of...

Spring boot serialize kotlin enum by custom property I have an Enum and I would like to serialize it using custom property. It works in my tests but not when I make request. Enum should be mapped using JsonValue enum class PlantProtectionSortColumn( @get:JsonValue val propertyName: String, ) { NAME("name"), REGISTRATION_NUMBER("registrationNumber"); } In test the lowercase case works as expected. class PlantProtectionSortColumnTest : ServiceSpec() { @Autowired lateinit var mapper: ObjectMapper data class...

Room "Not sure how to convert a Cursor to this method's return type" I'm new to android development and I'm working on a project called " water drink reminder " . this is my Dao and database codes. i'm getting "Room "Not sure how to convert a Cursor to this method's return type" error every time I run the app. so I searched about this and what I gained was " don't use LiveData with suspend keyword". I didn't use these two together but I still get this error. anyone can help? @Dao interface Dao { @Insert(onConflict = OnConflictStrategy.REPLACE) suspend fun...

How to loop through Seal Class object without Reflection? I try to loop through my seal class of sealed class NavigationItem(val route: String, val icon: Int, val title: String, val color: String) { object Home : NavigationItem("home", R.drawable.ic_home, "Home", "#FFFF00") object Music : NavigationItem("music", R.drawable.ic_music, "Music", "#FF00FF") object Movies : NavigationItem("movies", R.drawable.ic_movie, "Movies", "#00FFFF") object Books : NavigationItem("books", R.drawable.ic_book, "Books", "#FFAAAA") object Profile :...

Align a composable view to right side inside a Row Composable like alignParentRight I'm building a custom composable function view inside which I used Row composable, however I want to align the right icon to right end of the Row(align to the end of the parent) below is my code: Row(modifier = Modifier .fillMaxWidth() .wrapContentHeight() .padding(vertical = Spacing30), verticalAlignment = Alignment.CenterVertically) { Icon(modifier = Modifier.padding(vertical = 14.dp), painter = painterResource(id = R.drawable.ic_wallet),...

XML Data binding, how to get callback parameter This is the callback that I used: var onSelectionChanged: (Boolean) -> Unit = {} My databinding XML syntax is wrong, and unfortunately it doesn't compiled, How to get the Boolean invocation result of the callback

Localazy: Localazy Gradle plugin requires Android Gradle plugin 3.5.0 and newer I am trying to use https://localazy.com/p/locakalazy/integration/android for android language localization. But while adding this in app module -> apply plugin: 'com.localazy.gradle' localazy { readKey "########" writeKey "########" } I am getting this error -> Build file 'C:\Users\91863\AndroidStudioProjects\android-localization\app\build.gradle' line: 4 An exception occurred applying...

Why Spring kills file's encoding during downloading? I have the following code: @Throws(IOException::class) private fun convertInputStreamToString(`is`: InputStream): String? { val result = ByteArrayOutputStream() val buffer = ByteArray(DEFAULT_BUFFER_SIZE) var length: Int while (

is

.read(buffer).also { length = it } != -1) { result.write(buffer, 0, length) } return result.toString("windows-1251") } @RequestMapping(path = ["/download/{id}"], method =...

How to display a certain view from layout in Picture in Picture mod in android? I am trying to implement pip mode in android. There is a LiveStreamActivity which contains these elements: Header layout, VideoStream layout and custom popup that I show programatically. Their contexts are the same: LiveStreamActivity. When I enter pip mode LiveStreamActivity's root layout shrinks and fits in small pip screen. But I only want to show VideoStream layout. I tried setSourceRectHint to achieve this but it does not work. Summary : How to show desired view (or views) in pip mode?...

Show different views in recyclerview adapter on the comparison of two lists I am having a scenario in which I want to show two different items in one adapter. Here is a scenario, I have two lists on which I want to make a comparison, one list which is coming back end and one is coming from my local room database. Basically, I need to list the items coming from back-end, in these items which exist in my database will have different view in adapter and and if the item coming from backend does not exist in my database will have different views. If I'll make comparison...

Why it says " List contains no element matching the predicate." for android jetpack compose? I have Onboarding Screens for my project, and it work correctly, but I want to show users it just once, and I was using shared preferences for it, and when debug the project it is throw an error like that in logcat, List contains no element matching the predicate. , and in android emulator I can see main screen, but app crash quickly, when I open app again on simulator, onboarding screen shows just 1 second and open main screen, than app crash, I do not know why? I guess problem is because...

TelephonyManager.UssdResponseCallback sometimes use to dial the code successfully but still go to the onReceiveUssdResponseFailed callback Am working on an app to dial ussd code in background but am having a critical issue concerning the ussd callback, sometimes the code will successfully dialed but still the onReceiveUssdResponseFailed is still called public void dialUssdToGetPhoneNumber(String ussdCode, int sim) { if (ussdCode.equalsIgnoreCase("")) return; if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) { requestPermissions(new...

Multiple MIME types pdf and image From file manager I want to allow choose only pdf and images, is it possible to do in Android? I tried do same things from another answer, but I don't know why, file manager allow choose any file. override fun createIntent(context: Context, input: Array?): Intent { val mimeTypes = arrayListOf("image/*", "application/pdf") return Intent().apply { type = "*/*" action...

Read Gradle module metadata to select an artifact with maven Maven doesn't read Gradle module metadata to select an artifact. With Kotlin MultiPlatform, for instance okio publishes a bunch of artifacts like okio-jvm/ okio-linuxx64/ okio-macosarm64/ okio-macosx64/ okio-metadata/ okio-mingwx64/ When depending on it with Gradle, one can declare a dependency on com.squareup.okio:okio and Gradle will select the corresponding artifact. If the dependency is defined in Maven, the...

nested list filtering without changing object type in kotlin I want to filter nested lists with kotlin without changing the object type. For example, I want to get the list 'ExamObj' with age value 27 for the above model. The method to return the list is as follows. fun progress(respList: List): List{} this method takes a list...

How to get collection values in Kotlin lambda I have two collections: A and B. Both of them consist of equal amount of chars. I zip them. Then I need to count pairs of the same elements, like 'A' and 'A'. I need to write a predicate, but I can't find the way to get both elements from a zipped collection. I've tried something like this: val num = A.zip(B).count { it.i: Int, it.j:Int -> it.i == it.j} and this: val num = A.zip(guess).count { it[0] == it[2] } But it doesn't work. How can I reach both elements from these sub lists...

Proper usage of com.fasterxml.jackson.module.kotlin.UIntDeserializer I would like to make use of extra deserializers defined for Kotlin-specific data types: UInt, ULong and UShort. The following code does work as expected: val actual: UInt = objectMapper.readValue("4294967295") val expected: UInt = 4294967295u assertThat(actual).isEqualTo(expected) However I can't make it work for a data class like this: data class U( @JsonProperty("x") @JsonDeserialize(using = UIntDeserializer::class) val x: UInt ) val actual: U =...

Android add toolbar to fullScreen SDK On my job, I have a task to implement new SDK in the app. Everything works fine, but I have one situation. I start SDK like this in my fragment: IdenttWebViewSdk.start( activity = requireActivity(), sessionId = documentUploadResponse.sessionId, /* SESSION ID */ documentId = documentUploadResponse.reference, /* DOCUMENT ID */ frontendVerificationUrl = configurationRepository.getIdenttVerificationUrl(), requestCode = 100 ) The...

MVVM - What is the best layer for this logic? I am fetching images by using retrofit with MVVM Architecture. Now I want to add some features like image editing or compression and uploading. My question is . For MVVM architecture, is the business logic for these features a use case? domain usecase ImageCompressionUseCase.kt UploadImageUseCase.kt ui ImageCompressionViewModel.kt ImageCompressionFragment.kt UploadImageViewModel.kt UploadImageFragment.kt My brain says it's use cases but I'm a bit hesitant :) ImageCompressionUseCase.kt...

How to add title, image and description for a deep link in our app? I know this can be achieved using Firebase Deep Linking, but I find it a bit too complicated with a custom domain, so I go with the regular one. But, I could not find how do I add an image, title and subtitle for it? Also, the URL will be dynamic like this: forms.mysitename.in/solve/randomFormId

App crashes and gives this error java.lang.NullPointerException: null cannot be cast to non-null type android.content.Context i am new to android development,any help will be really appreciated, here is the code class Dashboard : Fragment() { lateinit var recycle:RecyclerView lateinit var reLayout:RecyclerView.LayoutManager lateinit var RecObj: AdapterData var bookInfoList = arrayListOf() override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,savedInstanceState: Bundle?): View? { val view = inflater.inflate(R.layout.fragment_dashboard, container, false) recycle =...

Serialization omitting nulls I have a class like this: @Serializable data class MyClass( val prop1: Int, val prop2: Int? ) When prop2 is null, I want to serialize this class without including the prop2 property. I can do this like this: val json = Json { explicitNulls = false } json.encodeToString(MyClass(42, null)) // gives {"prop1": 42} Unfortunately, there are many places in a large project that serialize this class, and currently they just use Json.encodeToString which includes the nulls explicitly. How...

Sending a notification if a document is added on a collection (firestore) Is there a way to get a notification everytime a document is added on a collection viewable in a recyclerview? This is what i have tried so far. It works if something is added, but a notification is sent again if i open the activity containing the recyclerview. I only wanted the notification to appear if outside the app or on another part of the app. private val CHANNEL_ID = "channel_id_example_01" private val notificationId = 101...

How to perform action in fragments by clicking action bar icon in activity Hello I have two icons in action bar update and edit when I click on edit icon my edit text becomes editable and I can edit data their. By clicking on update button my these editable edit texts data updated in firebase. I am doing this work in activity right now but I want fragment when I click on action bar icon in activity it perform update or edit functionality in fragment. Please guide me how to do this???

Android kotlin calling same api with different date params and inserting to room all together I have an api to return data based on from and to date params. The api is limited to return only 1 day data at a time. I need to fetch data for 7 days and insert it to room db. Fetching day by day and inserting to db is time consuming and hence causing bad user experience. How can I make 7 parallel calls to same api with different date params? After making all 7 parallel api calls, how can I combine the responses and bulk insert to room db Is there any other better way to fetch the entire...