Resolve @ReactMethod to undefined instead of null I'm creating a React Native bridge in which I'm using undefined as a default value for null. When a value returns null from Kotlin and we resolve the promise with that value, it appears as null on Typescript. Any way a bridged Kotlin method can resolve into undefined directly?

Is there an easy to get random number from the range in kotlin? I have checked THIS example but my studio do not see this function and not import is. Is there a similar way ? This one not import val randomNumber = (100..200).random()

ViewGroup.addview() is working but child view is not showing I develop an android app. I want to add TextView(s) to a LinearLayout dynamically. No error occurred but TextView is not showing. I thought sleep_records_container' height might be 0dp and I tried to set 300dp but nothing showed in this container. How do I solve this problem? Below Fragment is aim to show sleep records in one month. SleepRecordFragment.kt class SleepRecordFragment: Fragment() { @SuppressLint("SimpleDateFormat") override fun onCreateView( inflater:...

DaggerApplicationComponent Unresolved Reference I'm trying to apply DaggerApplicationComponent in MVVM architecture by modifying MVP app, Belajar App, but I've just got error of Unresolved reference: DaggerApplicationComponent. Kotlin kapt has been applied and I've tried to rebuild project, but instead I got error from application component: C:\Users\3\AndroidStudioProjects\belajar3 - Copy (3)\app\build\tmp\kapt3\stubs\debug\id\kotlin\belajar\di\component\ApplicationComponent.java8️⃣ error: [Dagger/MissingBinding] retrofit2.Retrofit cannot...

I am getting red line while using this dependency in android studio. How to resolve this? implementation 'com.android.support:recyclerview-v7:28.0.0' When I add this dependency, I got red line error

Grab a reference on joining colunm when in a spring boot application I am working on a spring boot project using kotlin and jpa I am stack with following Let us assume the we have a user and post table Each user has multiple post Now the normal behaviour is to create a relation ship by adding annotation onetomany in the user entity class And that i have done and added @joinColumn(name=uid) and that is fine until now The problem that i need a refernce to this joining column because I need to use it inside my code Also i need to create a find method on this...

How to keep bottom sheet in backstack when navigating forward? I am using Accompanist Bottom Sheet Destinations in my project. The setup is exactly the same as shown in docs. @Composable fun MyApp() { val bottomSheetNavigator = rememberBottomSheetNavigator() val navController = rememberNavController(bottomSheetNavigator) ModalBottomSheetLayout(bottomSheetNavigator) { NavHost(navController, Destinations.Home) {...

Firebase dynamic deeplink crash I am following Add Firebase to your Android project documents to integrate the Firebase dynamic deeplink. I am getting below error in code: java.lang.NoSuchFieldError: No static field NO_OPTIONS of type Lcom/google/android/gms/common/api/Api$ApiOptions$NoOptions; in class Lcom/google/android/gms/common/api/Api$ApiOptions; or its superclasses (declaration of...

How to make a locked levels in a game in kotlin? I'm making a game with so many levels I want that when the user unlock a level he can continue to the other level automatically and also when he leave the game and comeback and click at any of the levels the he unlocked it opens. how can I do that?

How to create a shortcut of recycleview item on home screen on button click programtically android 1.I want to know how to create a shortcut of specific path on home screen. 2.Can particular item of recycelerview can be created and added as shortcut on home screen? 3.If it is possible any programmatic leads how it can be done. some type of code snippet if possible.

HTTP or Socket Kotlin Java Keep Trying Endpoint Until Success Response Received I am developing an application that requires a feature similar to that of Hulu's or Netflix's sign in on tv with code feature. I need the android application to keep trying an endpoint until a success response is received. I also came across web sockets but am unclear on which of these routes, or other, would be the better route to go. Some questions I have in regards to this is, should I keep on request open or do multiple requests? Can I have a intent running with retries to maybe...

cannot reslove symbol 'Task' in kickstarter build project guys i tried to clone kickstarter from git & i m having problem in build project ` // Copy google-services.json from variant directory to root of app gradle.taskGraph.beforeTask { Task task -> if (task.name ==~ /process.*GoogleServices/) { android.applicationVariants.all { variant -> if (task.name ==~ /(?i)process${variant.name}GoogleServices/) { copy { from "src/${variant.name}" into '.'...

can not send int to respond in ktor I'm trying to send int response but get an error but when I use both as a string then response get successfully. post("/employee") { call.respond(mapOf("hey" to "Hey","if" to 1)) } LOGCAT java.lang.IllegalStateException: Serializing collections of different element types is not yet supported. Selected serializers: [kotlin.String, kotlin.Int] at io.ktor.serialization.kotlinx.SerializerLookupKt.elementSerializer(SerializerLookup.kt:45) at...

Which coroutine dispatcher to inject when testing a Kotlin console I have a back-end springboot Kotlin app that has some simple coroutine code for parallel IO operations. It looks something like this @Service class AccountService( private val client: ApiClient private val coroutineDispatcher: CoroutineDispatcher ) { fun getAccount(): AccountDTO { return runBlocking(coroutineDispatcher) { val foo = async { client.getFoo() //some long operation } val bar = async { client.getBar() //some other operation...

Continuous ripple animation - Android Is it possible to add a continuous ripple effect behind an icon which can be show/hide programmatically? The "icon" is a MaterialButton. Something like this:

kotlin.UninitializedPropertyAccessException: lateinit property WebView has not been initialized I created an android app and loading an html file on android webView. Which is loaded successfully and working fine. class MainActivity : AppCompatActivity() { private lateinit var myAndroidWebView: WebView; @SuppressLint("SetJavaScriptEnabled") override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setWebviewDetails(); } private fun setWebviewDetails(){...

Kotlin: unwrap an object using Jackson in Spring I'm looking at trying to unwrap a Kotlin object to the top level of the JSON structure when it is unwrapped, but my app just seems to ignore the @Unwrapped annotation. Here is my object: data class MyResponse( @JsonUnwrapped val myObject: MyObject? = null, val secondObject: String? = null ) data class MyObject( val fieldA: String ) The controller: @RestController @RequestMapping(produces = [MediaType.APPLICATION_JSON_VALUE]) class MyController() {...

Jetpack compose Lazy Column item state does not change even though state i viewModel changes I have debugged the app and I saw that the data in UIState changes when I try to add or remove the item, especially the isAdded field. However, even though the isAdded changes, the AddableItem does not recompose. Additionally, when I try to sort items, or try to write a query THAT WILL NOT SEND ANY API REQUEST, JUST CHANGES THE STRING IN TEXTFIELD, the UI recomposes. So UI reacts to changes in UIState. I have searched for similar issues but cannot found anything. I believe that the framework...

Does cyclic reference in Android creates memory leak? I have one ViewModel and one Utility class. MyViewModel creates an instance of the utility class (Manager) and registers a callback. As per my understanding, this might create memory leak as these objects won't be garbage collected as their reference count will be always greater than 1. class Manager(private val listener: (String) -> Unit): BarCodeScanResult { fun launchSDK(activity: Activity) { // launches a activity to scan a bar code } override fun processResults(result:...

Nested Recycler Views, Vertically Scrolled ( Parent using Pagination ) The inner recycler view is not scrolling I have tried many solutions, non helped me, how can I make the inner recycler view scroll vertically, they both scroll vertically.

How to get Callback share result in android How to get the intent callback sharing result, i have seen some code and implemented from my side. Below is the sample code try { Intent intent = new Intent(android.content.Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(Intent.EXTRA_TEXT, "Body"); startActivityForResult(Intent.createChooser(intent, "Choose"), 1); } catch (Exception e) { e.printStackTrace(); } Code for callback result @Override...

How to solve "does not have a NavController set" I want to reach Detail Fragment from Main Fragment. ERROR W/System.err: java.lang.IllegalStateException: View androidx.cardview.widget.CardView{7fe29a5 VFE...C.. ...P.... 0,0-381,319 #7f080085 app:id/container} does not have a NavController set W/System.err: at androidx.navigation.Navigation.findNavController(Navigation.kt:71) W/System.err: at com.isilon.beinconnect.ui.main.adapter.MainAdapter.onBindViewHolder$lambda-0(MainAdapter.kt:68) W/System.err: at...

Google Maps Launch the Application When I push the button, how will I be able to launch the Google application? My application crashes when I launch it. I'm working with Kotlin. Below is the sample of the code. Thank you launch_button = findViewById(R.id.button1) launch_button.setOnClickListener(object: View.OnClickListener{ override fun onClick(view: View?){ val mapIntent = Intent(Intent.ACTION_VIEW, Uri.parse("google.navigation:q=22.659239,88.435534&mode=1"))...

Why my app crashed when upload a bytearray image? So I want to upload the image shown in imageView to Firebase Storage, but Firebase Storage only accepts bytearray and uri files when upload. So I converted the imageview into bytearray. The code is working fine but when I upload the picture on my phone, the app crash. Anyone knows why? The code is shown below: imagePicker = findViewById(R.id.edit_cover_picture) val bitmap = (imagePicker as BitmapDrawable).getBitmap() val stream = ByteArrayOutputStream()...

Execute suspending function in jdbi's "inTransaction" handle I'm currently working on a kotlin project and for the database layer I'm using jdbi (instead of an ORM I want to use something where I can write plain SQL). I have to execute multiple statements in a transaction and the statements are already packed in suspending functions. To run multiple statements in one transaction I try to use the following code: suspend fun withinTransaction(fn: suspend (Handle) -> T): T = jdbi.inTransaction { handle -> fn(handle) } This is...

androidx.recyclerview.widget.RecyclerView cannot be cast to androidx.cardview.widget.CardView - Drag and drop I am trying to build a drag and drop activity, where user can drag an item from Recyclerview to a card view, i am following android's drag and drop documentation, the dragging is working fine, have shadows, but when i drop the item to one of the cardviews, it throwing the error,androidx.recyclerview.widget.RecyclerView cannot be cast to androidx.cardview.widget.CardView i have worked it in the past, but it was dragging item from textView to ConstraintLayout. <a...

Jackson - Generics- T as reified parameter I'm trying to implement an abstract message-consumer with kotlin and jackson for RabbitMQ. The setup for the consumers works fine, so I omit that in the code-snippets. The Problem is only in regard to parsing the String-payload to a generic-type object. My Goal is to have an abstract class like : abstract class AbstractRetryConsumer(val queueName:String) : MessageListener { // Autowiring and seting up the Beans ... override fun onMessage(msg: Message) { val msgPayload =...

java.lang.Class has no zero argument constructor and Cannot create an instance of ViewModel When I'm visiting the application and once accessing this fragment(MenstrualFragment), the application crashes and this is displayed in the Logcat - 2022-06-23 15:44:59.110 11278-11278/com.miniproject.monthlies E/AndroidRuntime: FATAL EXCEPTION: main Process: com.miniproject.monthlies, PID: 11278 java.lang.RuntimeException: Cannot create an instance of class com.miniproject.monthlies.ui.fragments.menstruation.menstrual.MenstrualViewModel at...

How can I create child views dynamically in MVVM Android? I am new to MVVM in Android. Is there a way to add child views of group layout such as chipgroup, radiogroup? Let's say there is this kind of data from a server. [name: 'coffee', size: 'tall', 'grande', 'venti' ..., name: 'pizza', size: 'small', 'medium', 'large' ...] And here is what I have done so far: main XML ViewModel val listItem = MutableLiveData(...) listItem= ... // get data and convert into view data blabla ItemViewModel class ItemViewModel() { val name:String val...