getItemCount() does not get called even after notifyDataSetChanged() I get a very strange problem with Recyclerview , I get the data which is 200 items I notify the Adapter about the dataset change by using notifyDataSetChanged() but the getItemCount() doe not get called, and this is happening when I try to change the fragment (since my recycler view is withing a fragment ) you can notice this in the follwoing screenshots <a href="" rel="nofollow...

Increment value by 1 on each iteration in map Hey guys i am new to Kotlin and want to see what is the easiest way to increment value of a map by 1 on each iteration, here is my attempts This is how my map looks like. val countByStatus: MutableMap = mutableMapOf() when (val count = csv.countByStatus[rowResult.status])     {         null -> csv.countByStatus[rowResult.status] = 1         else -> csv.countByStatus[rowResult.status] = count + 1     } or csv.countByStatus.merge(rowResult.status, 1, Int::plus) or...

Android ViewModel LiveData Documentation I read the documentation but became confuse on some part. ViewModel objects are designed to outlive specific instantiations of views or LifecycleOwners. This design also means you can write tests to cover a ViewModel more easily as it doesn't know about view and Lifecycle objects. ViewModel objects can contain LifecycleObservers, such as LiveData objects. However ViewModel objects must never observe changes to lifecycle-aware observables, such as LiveData objects. If the ViewModel needs the...

How to apply a Rule to all test cases in a AndroidJUnitRunner? I'm trying to apply a TestWatcher as a rule across all my test cases run by a particular runner. MetadataCollector: class MetadataCollector : TestWatcher() { ... } TestRunner: class TestRunner : AndroidJUnitRunner() { override fun onCreate(arguments: Bundle?) { super.onCreate(arguments) } override fun newApplication(cl: ClassLoader?, className: String?, context: Context?): Application { return super.newApplication(cl, TestApplication::class.java.name, context) } } All of...

FilePath keeps returning null when uploading image in Android studio I have been trying to implement a feature in my app using Kotlin that lets a user upload an image after clicking on an empty image slot: override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.get_started) val imageView = findViewById(R.id.userPhoto) as ImageView imageView.setOnClickListener{ selectImage() } override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {...

On back navigate previous fragment lost data In my MainActivity i have a Contacts fragment, which has a ViewPager and a BottomNavigationView with FriendsFragment and PendingsFragment. By default, the FriendsFragment is shown when the ContactsFragment opens. override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { val view = inflater.inflate(R.layout.fragment_contacts, container, false) ViewPagerAdapter(requireFragmentManager()).apply...

How to use "DID" in android for string resources? I have string resources with did value My Test App My App description Category %d I get the did value from source. I have to show the string using this DID. How can I use this in android?

How to reassign a variable from another class in Kotlin? In the application that I'm building, in an Activity, I have an class that I used in diverse functions throughout my Activity. class SelectChapterActivity : AppCompatActivity() { private val storyInfo: Story // the class get() { val storyTest = Gson().fromJson(intent.getSerializableExtra("storyJson").toString(), Story::class.java) return (storyTest) } I need this class to be accessible from all the Activity, because from this class I launch another...

Android Usage stats totalTimeInForeground returning 2 different values I am trying to print a sum of usage statistics for the on-going day, for selected applications. I do this by looping through a list of usage statistics and through a list of the selected applications, checking if the package names match, and adding up the total time in foreground to a long variable that is initialized as 0. I noticed however that the total usage appears to be much higher than expected, and I added some logs to check the totalTimeInForeground values I get in the loop. I...

Button is not filling parent container height I've already looked at solutions for this on stackoverflow, but none have solved my issue, any ideas? The button is not filling parent container. I've tried RelativeLayout, and same behavior. already tried this -https://stackoverflow.com/questions/20397575/android-button-height-in-layout-not-filling-the-parent My xml

How to update a single row where the row's id is specified, in SQLite database in android studio I have a table where I store customers Ids and names and I want to update a row where the id is equal to the id I have passed as a parameter in the updateCustomerData(id: String) method. I have generated customers ids myself and store them in the COL_CUSTOMER_ID column as String data type. I have tried many ways none of them work properly and throws Exception. This is my updateCustomerData(id: String) method.

How to use okhttp3 for airflow experimental api in Kotlin? I need to transform this command to okhttp request (value of the conf key must be a string) curl -X POST \ http://localhost:8080/api/experimental/dags//dag_runs \ -d '{"conf":"{\"key\":\"value\"}"}' Response of this code val conf = "'{\"conf\":\"{\\\"key\\\":\\\"$value\\\"}\"}'" val body = RequestBody.create(MediaType.parse("application/json"), conf) val request = Request.Builder() .url(url) .post(body)...

How to make video youtube embed on webview full screen on android R I have check code from this Playing HTML5 video on fullscreen in android webview However this answer only cover for android 9 but this method depreciated in android 11. If anyone could help me

CORS failed on firefox browser on google cloud run deployed app Am running a Kotlin server on google cloud run but when I hit an post api from browser it is showing error as CORS failed. I have setup cors in kotlin ktor this way: install(CORS) { method(HttpMethod.Options) method(HttpMethod.Get) method(HttpMethod.Post) method(HttpMethod.Put) method(HttpMethod.Delete) method(HttpMethod.Patch) header(HttpHeaders.Accept)...

Kotlin/Native can't import io.ktor.network.selector.ActorSelectorManager I want to use TCP Sockets in Kotlin/Native using KTOR and I followed the according tutorial. But somehow I can't import ActorSelectorManager from io.ktor.network.selector and get Unresolved reference: ActorSelectorManager My build.gradle.kts looks like this: plugins { kotlin("multiplatform") version "1.4.32" kotlin("plugin.serialization") version "1.4.32" } repositories { mavenCentral()...

I am getting this error whenever i am trying to run the app. Please give me a solution to solve it i have tried to run the app but the app is showing an error of An invalid XML character was found in the element content of the document.(in strings.xml) What should i do to solve this

ROOM AutoMigrations - Please declare an interface extending 'AutoMigrationSpec' I've been experimenting with the new feature from ROOM library version 2.4.0-alpha01 "AutoMigration". But I've been getting this error all the time when trying to rename one column from my table. I have already created an interface which implements AutoMigrationSpec, but still getting this error. Any help? Error: AutoMigration Failure: Please declare an interface extending 'AutoMigrationSpec', and annotate with the @RenameColumn or @RemoveColumn annotation to specify the change to be...

Why when update data in firebase the data in recyclerView duplicated if I any change in firebase like delete, update. The data in recyclerView is duplicated if any of those CRUD occur, so I added temporary swipeRefresh to refresh the activity but this solution doesn't make sense. This image below explain when I update data in firebase and what happend in RecyclerView MainDashBoard.kt import com.google.firebase.auth.FirebaseAuth import com.google.firebase.database.DataSnapshot import...

Как реализовать это view? Или уже есть реализация? Как реализовать это view? Или уже есть реализация?

How to set max count for repeat to getOrElse function in Option android I've problem with max repeat count for request that returns error. In my case I need to send a new request to backend, if previous was falling, but 3 time max. I'm using option to get result, that returns data or error: fun sendRequest(): Single option.map { if (option.error != null) { Single.just(null.toOption()) } else { Single.just(it) } }.getOrElse{ sendRequest() } } But in case when I have error I will call sendRequest endless....

How to create a flow which detects value increments of another flow? I have a hot flow fooFlow that emits integer values. How can I construct another hot flow barFlow that only emits values when fooFlow emits a larger value than the previously emitted value. Example: If fooFlow emits (4, 2, 3, 3, 7, 5, 6, ...), then barFlow emits (3, 7, 6, ...).

Is it possible to launch an app with an item in the lazyRow clicked in jetpack Compose? Can I launch my app with the last index of my lazyRow clicked? I have a list of dates that I wanted the informations of the last date to be launched with the app

Spring Boot validation message not shown I have a Spring Boot application (with version 2.4.5) as a Kotlin project. Now when I enter something invalid, I get an error message, but not my error message that I set in the annotation. Controller @PostMapping(value = ["/seatMap/save"]) fun addSeatPlan(@RequestPart @Valid data: DSeatMap, @RequestPart image: MultipartFile?, auth: AuthenticationToken) { try { if (data.uuid == null) { seatService.addSeatMap(auth.organisation!!, data, image)...

r2dbcEntityTemplate configuration with connection pool? Might rather be a dumb question but I am new to configuration r2dbc and trying to read through the documentations. I noticed that to configure pooling, I need to send the connectionfactory to connection pool. import io.r2dbc.pool.ConnectionPool import io.r2dbc.spi.ConnectionFactory import org.springframework.context.annotation.Bean import org.springframework.context.annotation.Configuration import io.r2dbc.spi.ConnectionFactories import io.r2dbc.spi.ConnectionFactoryOptions.CONNECT_TIMEOUT...

403 Forbidden SQL-Injection Error for POST with Content-Type = text/xml I need to make an API request using feign. Method type: POST; Headers must include Content-Type = text/xml. My code: @Component @ConfigurationProperties("client.machine") class MachineProperties { lateinit var url: String lateinit var timeout: String } @Configuration class MachineClientConfig( private val connectionProperties: MachineProperties, private val meterRegistry: MeterRegistry, private val objectMapper: ObjectMapper ) { @Bean fun machineApi() =...

Reading property values to boolean in Kotlin/Spring with @Value I've seen examples of how to do this in Java but I'm lacking an example in Kotlin. I want to read a property into a boolean using the @Value annotation from Spring In my constructor I'm doing: @Value("\${kafka.userComplexTopics:false}") val useComplexTopicsString: String, to pull out my String value and then in my class I have: private val useComplexTopics = useComplexTopicsString.toBoolean() I've been screwing around with SePL and can't make it work in one line.

How to import more complex React components to Kotlin? After completing the Kotlin/ReactJS quickstart, I thought of making a quick paint app to try it out. Of course however, why make my own painter when somebody has already done this, leading me to try out the react-painter npm component. However, outside of...

Kotlin Fused Location Provider Client Not Working Im Moving from Java to Kotlin and i want to get user update location, I noticed that its not so different from java using Fused Location Provider Client but its not working at all! This is my activity : class MainActivity : AppCompatActivity() { private lateinit var fusedLocationClient : FusedLocationProviderClient private lateinit var locationRequest : LocationRequest private lateinit var locationCallBack : LocationCallback private val LOCATION_PERMISSION_ID = 999...

Function parameter names in Kotlin I saw in some Kotlin samples the next syntax where the name of the parameter is set before the value being passed: LoginResult(success = LoggedInUserView(displayName = result.data.displayName)) What is above the difference from the next syntax? Is it only visual or has some type of purpose? LoginResult(LoggedInUserView(result.data.displayName))

How to convert image list to byte array override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { if (requestCode == 2 && resultCode == Activity.RESULT_OK && data != null) { img= data.data if (img!= null) { if(Build.VERSION.SDK_INT >= 28) { val source = ImageDecoder.createSource(this.contentResolver,img!!) secilenBitmap = ImageDecoder.decodeBitmap(source) imageView.setImageBitmap(secilenBitmap) } else {...