java.lang.IllegalStateException: no current navigation node in Kotlin NavigationComponent App I was developing an Kotin App which make use of Navigation component to moves between the diferents screen of the App. My problems comes when I try to separate the root_navigation.xml of the main_navigation.xml The main structure of my app is a splashScreen which send you to LoginScreen, where you can authenticated which firebase via Googe Provider or email/password provider. The HGoogle Authentication works fine, and send you to the HomeFragment of the App, but the Authentication with...

Kotlin - how to create and connect two different android apps in same PC? In my case, have two different apps but both two have some connections. Like, app 02 scan app 01 QR, send notifications so How to make both two app in same laptop and connect. Is it possible to create two different app modules in one project? but how to share data between those two apps?

How to center a progress bar in Jetpack Compose? I have a case of "Success" which is triggered when I get the data from a database: is Success -> Box( modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center ) { LazyColumn { items( items = items ) { item -> itemCard( item = item ) } } when(viewModel.isItemDeleted.value) { is Loading -> CircularProgressIndicator() is Success -> Unit is Failure -> Log.d(TAG,...

How to best show a popup menu on Jetpack Compose for Desktop? So I have the concept of a popup menu... @Composable expect fun PopupMenu( menuItems: List, onClickCallbacks: List Unit>, showMenu: Boolean, onDismiss: () -> Unit, toggle: @Composable () -> Unit, ) And I have a popup menu implementation for desktop... @Composable actual fun PopupMenu( menuItems: List, onClickCallbacks: List Unit>, showMenu: Boolean, onDismiss: () -> Unit, toggle: @Composable () -> Unit, ) { DropdownMenu( expanded =...

Map Retrofit RxJava Result into sealed class Success and failure I am using retrofit with RXJava to call my APIs, i am trying to map my call result into sealed class success and failure parts, I did the mapping part but I am always getting this error java.lang.RuntimeException: Failed to invoke private Result() with no args Here is my code: Retrofit interface @POST("$/Test") fun UpdateProfile(@Body testBody: TestBody): Single Result Sealed Class sealed class Result { data class Success(val value: T) : Result() data class Failure(val throwable: Throwable)...

How do I test SharedFlow controlled by a viewModelScope? I have a SharedFlow. When the ViewModel is created, I change the value to Val1. After that, I use the viewModelScope to make some fake delay of 3 seconds and then change the value to Val2. class MyViewModel : ViewModel() { val x = MutableSharedFlow() init { x.tryEmit("Val1") viewModelScope.launch { delay(3000) x.tryEmit("Val2") } } } Question How do I test the initial value is Val1? How do I test if the value has changed to Val2...

ERROR : Type annotation was missing for parameter MultipartBody Trying to use Retrofit for the first time and am also very new to Kotlin so I'm hoping this is just a syntax issue and nothing bigger. Trying to create the interface for an image upload but I'm seeing this error: value-parameter @Part MultipartBody: [ERROR : Type annotation was missing for parameter MultipartBody] The interface: import retrofit2.http.Multipart import retrofit2.http.POST import retrofit2.http.Part import okhttp3.MultipartBody; import retrofit2.Call; interface...

how to generate QR using data from another activity? kotlin - Android Studio I use this code for generating QR code, but with this there's no error, at the same to not generated. Is their anything wrong in this code? I'm confused. I think I did all correctly. But why the QR is not generated? I'm a student. please help me to solve this? override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) view.findViewById(R.id.imageQR) val bitmap: Bitmap? = textToImage(sessionId, 500, 500)...

Gradle build time is slow, more than 5hours for my android project. Build variant is debug I have a robust android project thats uses too many modules, i want to decrease my gradle build time because the build time elapse more than 5hours. Here is my gradle.properties file # Specifies the JVM arguments used for the daemon process. # The setting is particularly useful for tweaking memory settings. org.gradle.jvmargs=-Xmx4g android.useAndroidX=true android.enableJetifier=true #android.enableR8=false android.enableD8=true kapt.incremental.apt=true #org.gradle.daemon=false...

Can't run IOS tests for Kotlin Multi Plateform Mobile app I just installed the KMM plugin on Android Studio to create a multi plateform mobile app. I followed all the steps in the doc https://kotlinlang.org/docs/kmm-create-first-app.html#run-your-application-on-android but when I tried to run the test for IOS, I received "No tasks avaiable". Someone has the same issue than me ? I work on a Mac Book air M1 computer and I have...

How do I start an activity in the background and close it immediately? So I have a SettingsActivity that will launch my SettingsFragment when the user clicks on the settings button in MainActivity. For my SettingsFragment, when the user launches the screen for the first time, it will activate the AlarmManager I have set it up. This defaults to on when the user signs in for the first time. The user does have the option to turn off notifications. Now, if the user never goes to the settings screen, it will never activate the AlarmManager. How do I start the...

what is the best way to update a list with diffUtils i want to update a list item with diffUtils but after i set list with diffDiffUtils like this: val coinsDiffUtil = DataDiffUtilCallBack(itemList, newData) val diffUtilResult = DiffUtil.calculateDiff(coinsDiffUtil) itemList = ArrayList(newData) diffUtilResult.dispatchUpdatesTo(this) diff util doesn't update recyclerView items so i use a function like this: fun updateItem(item: Model) { val index = itemList.indexOfFirst { it.id == item.id } itemList[index].enabled =...

How to enable Log.I from an external library? I am using ItemTouchHelper, and I've seen that in some functions Log.i are used for exmaple: Log.i(TAG, "intercept: x:" + event.getX() + ",y:" + event.getY() + ", " + event); So, when I look at the "Run" or the "Logcat", nothing appears. I want to know if there is a way show these messages.

android Room with kotlin value class? I'm trying to use a room entity with a value class: @JvmInline value class UserToken(val token: String) and the entity: @Entity(tableName = TABLE_AUTH_TOKEN) data class TokenEntity( @PrimaryKey val id: Int = 0, val token: UserToken ) I get the following error: error: Entities and POJOs must have a usable public constructor. You can have an empty constructor or a constructor whose parameters match the fields (by name and type). public final class TokenEntity { ^ is it even...

PagedListAdapter doesn't display right item after refreshing (sometimes, not always) In my recyclerview, I have a header (position 0). On this header I can filter what kind of data I want to display. Sometimes when I click on a filter option, it doesn't display the correct item. I use invalidate() to reload data after selected/unselected a filter. Example of the unexpected bug in video : <a href="https://drive.google.com/file/d/1aKdOZKj8tEdecHzWqYMFkzyP2yYpYDIb/view?usp=sharing" rel="nofollow...

Android Databinding variable type int[] Am trying to declare a variable in databinding layout it's type is array of integer but I getting an error when building the project Cannot find a setter for that accepts parameter type 'int[]' If a binding adapter provides the setter, check that the adapter is annotated correctly and that the parameter type matches. the variable declaration in xml the binding adapter @BindingAdapter("availableGradesIndexes") fun LinearLayout.bindGradeWithMarks(availableGradesIndexes: Array) {...

Kotlin , code enters if statemant even when condition is false I'm really confused here ... looks like a really silly mistake but I don't know what's happening. Here's little snippet of my code : if (tempDeltaDeviation > standardDeltaDeviation) { Log.e(TAG, "handleMessage: plus $tempDeltaDeviation : $standardDeltaDeviation") scaleUpAnimation(deltaAnimStep, "Delta", binding.deltaImg) } Really basic stuff, right ? Well checking the logs I can see : handleMessage: plus 1.57756888292539E14 :...

Android stopping periodic work manager in background I'm using periodic work manager for send local data to server, when application doesn't work. It works perfectly on mine Google Pixel, but it stopping on Arma or Xiaomi devices, let's some code: val tag = BackgroundSyncWorker.TAG val workManager = WorkManager.getInstance(context) val period = if (BuildConfig.DEBUG) { DEBUG_BACKGROUND_WORKER_PERIOD } else { BACKGROUND_WORKER_PERIOD } val request = PeriodicWorkRequest.Builder( BackgroundSyncWorker::class.java, period,...

Not getting random DIE results, all 6 are showing same image and same rolled number (Android Development) I need to display 5 random die results, what am I doing wrong that they are all resulting in the same number and image? IE. Roll a 5, they all show 5 and the 5 image shows up when they all need to be random. val iv1 = findViewById(R.id.iv1) as ImageView val iv2 = findViewById(R.id.iv2) as ImageView val iv3 = findViewById(R.id.iv3) as ImageView val iv4 = findViewById(R.id.iv4) as ImageView val iv5 = findViewById(R.id.iv5) as ImageView val btnRoll =...

I received a searchView sample source and am studying code. There are some things I don't understand, so I seek your advice I received a searchView sample source and am studying code. What I found is a sample code that I received from https://johncodeos.com/how-to-add-search-in-recyclerview-using-kotlin/ There are some things I don't understand, so I seek your advice. Related sources are <a href="https://github.com/johncodeos-blog/SearchRecyclerViewExample" rel="nofollow...

Adding Date TypeConverter causes Room to fail storing API results I have searched for quite a while and am at a loss. My app makes some fairly routine API calls and stores the results in a Room DB, this all works perfectly until I try and utilize a TypeConverter for a date field by changing the data type of a parameter in one of my classes/tables. The problem is I'm not getting any error, it's simply not storing any data in the Room database the moment I switch the type. I swear I've implemented this correctly based on everything I've read and seen, I...

Cannot solve this error. Kotlin -Firebase I need to get those data to a recyclerview, so I created an adapter class and items class. There's no issues. but, java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.busconductor/com.example.busconductor.busCodesActivity}: kotlin.UninitializedPropertyAccessException: lateinit property reference has not been initialized This is the error I got I did all right, but cannot solve this. <a...

Create a Kotlin Library (not multiplatform) in IntelliJ I'm developing a math themed Android App (in Kotlin) and want to implement the logic (so the math part) in an external library. My question is: How can I create a project, that I can use as a library, so that I can import it in other projects (e.g. the actual Android project). I know I can create a "multiplatform library" or an "android library", but I don't want to implement platform specific implementations (for js, native...). I just want to write my code in Kotlin. Is it possible just to...

Execution failed for task ':app:kaptDebugKotlin'. &gt; Getting this error when making a build on Android Studio Execution failed for task 'appkaptDebugKotlin'. A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction java.lang.reflect.InvocationTargetException (no error message)

Problem with NavArgs in my fragments android I have problem with NavArgs. I have a fragment A, B, C. From fragment A to fragment B, I pass a field from the Parcelable object, let's call it currentState. Then I get into fragment B and pass another field from another Parcelable object, let it be city and I get into fragment C. And this is where the strange thing begins. If I navigate from fragment C to fragment B via findNavController().navigate(action_fragment_c_to_fragment_b), then a NullPointerException on my getArgs() is thrown, but...

Retrofit looking for non-existent param? I'm using retrofit to generate the POST requests in my simple API call: interface IRetrofitCommService { @POST("pushnotifications/{entityId}") suspend fun getNotificationsAsync( @Path("entityId") entityId: Long, @Body model: GetNotificationsDto ): Response @POST("pushnotifications") suspend fun registerDeviceAsync(@Body model: RegisterEntityDto): Response } Note that in the second call, I have only 1 parameter, which is marked with the @Body annotation. Yet, when I try to...

RecyclerView inside of Fragment is getting, "No adapter attached; skipping layout" error I have a recyclerView in a fragment that is inside ViewPager2, but when I launch the app, the recyclerView doesn't load the data, and looking at the Logcat I see this error. E/RecyclerView: No adapter attached; skipping layout I have looked at other answers to this problem, but none of them could fix the problem. This is my code for the fragment. class FirstFragment : Fragment() { // creating variables for ui components. private var courseNameEdt: EditText? = null private var courseDescEdt:...

Error Handling with State and Jetpack Compose I'm migrating my application to JetpackCompose, but I'm having problems with State, I have a ViewModel with several LiveData, one of them is LiveData which is activated only when there is an error (return from retrofit, room or validation). It's a normal ViewModel, it works well with Android Views. I need to show a Snackbar with the Int of this LiveData (an id String), it happens that after the error appears for the first time, it starts to appear whenever a Dialog is opened, so the Snackbar...

After connecting to BLE device,how can i know which services are available, i only know to print uuids but i want to know the name of service i am new to android development with Kotlin, i am developing an app to search for BLE devices. i am able to print the services(uuids) and its characterstics(uuids). i dont have any particular beacon to connect. i am just searching with my app and getting list of ble devices around me. i am randomly connecting to one of them and printing its services to the console. My question is that how can i know for the device i am connecting what it is advertising and what can i read from it. i am not...

How to chain lambdas to a resulting lambda in Kotlin? ... or the equivalent of java.util.Function.andThen() In Java Function add1 = string -> string + "1"; Function add2 = string -> string + "2"; void print(String string) { System.out.println(add1.andThen(add2).apply(string)); } This function prints string + "12" How would I write it in Kotlin? val add1 = { string:String -> string + "1" } val add2 = { string:String -> string + "2" } fun print(string: String) { println(???) }