How do I pop android navigation backstack up to a certain fragment? I am once again asking for your intellectual support. I have a fragment that puts a number of copies of itself on the navigation backstack like this: Navigation.findNavController(button).navigate( TaskCollectFragmentDirections.actionTaskCollectFragmentSelf(args.taskIndex, args.screenIndex + 1) ) The code above works as intended. The problem comes, when I want to pop a specified number of these fragments off the navigation backstack. (Triggered by a buttonpress.) I've tried to do it like...

Android Studio unable to access Orianna API when it works fine in Java I am currently creating an app, where I am trying to use the Orianna plugin to access the RiotAPI to pull summoner information on Android Studio/Kotlin, but it is unable to do anything with the data pulled Kotlin: https://pastebin.com/csjLCNfk Error: Java: <a href="https://pastebin.com/AZYjC4ji" rel="nofollow...

Parameters KFunction in Kotlin I have a class that has the type parameter KFunction (It is understood that I will indicate the type of function that I want to work with in the future) I want a class method to take the same parameters that KFunction has and call subscribers with those arguments. However, I don't know how to get the type of the function parameters. There are delegates in C #. How to do something like this in Kotlin? My class: class Event { val subscribers = mutableListOf() operator fun...

Android Kotlin Initializing listof JSON objects So I have a Comment class contacting JSON objects which I want to store in a list like so: class Comment(commentJSON: JSONObject) : Serializable { private lateinit var commentDate: String lateinit var humanDate: String lateinit var commentId: String lateinit var commentBody: String lateinit var child: List } So far so good. The problem comes when I want to initialize the "child" List: init { try { commentDate = commentJSON.getString(COMMENT_DATE)...

Necesito eliminar item de un arrayList con valores duplicados en Kotlin [closed] Tengo un arrayList en kotlin donde tiene algunos datos duplicados (id duplicados) newProduct: ArrayList Ejemplo del data class: data class CartProduct ( ..... val id: String, ..... val quantity: Long, .....) Entonces necesito eliminar los items del arreglo duplicados y conservar solo uno y que ese item tenga como valor de quantity la suma de todos los quantity que estaban duplicados con ese id Hasta el momento solo tengo algo asi: newProduct.removeAll {...

Compose Fragment crashes application when using Jetpack Navigation I am currently facing a really weird issue in Jetpack Compose. I am using the Navigation Component library (hosting Fragments in a NavHostFragment). Some newer Fragments are already using Compose, but I get this crash on a rare occasion. Mostly when navigating using the Navigation Drawer to the settings page and clicking back on an item in the Bottom Navigation View. I am currently using Jetpack Compose alpha-12 and Navigation 2.3.0. @AndroidEntryPoint class StatisticsFragment : Fragment() {...

Android Dynamic Feature : Error -2 Module Unavailable I have been debugging all day with no result, I've followed every documentation and google code labs and uploaded the bundle to internal testing and the error persists : Module Unavailable, below is my implementation: Module AndroidManifest.xml Module build.gradle: plugins { id 'com.android.dynamic-feature' id 'kotlin-android' id 'kotlin-kapt' id 'kotlin-android-extensions' } android { compileSdkVersion 30 buildToolsVersion "30.0.2" defaultConfig {...

loop through the lines which are specified through a parameter I have a chunk of code below which reads from a file in s3 and processes all the lines. The file doesn't have any line numbers in it. However, I want the code to process only specific lines of file. How should I approach that? Note: The start line number and end line number are being passed as parameter. Below is the current code var counter=0 s3Service.getS3FileBufferedReader(s3File).use { s3BufferedReader -> s3BufferedReader.useLines { lines -> lines.forEach {...

I am creating one app .please tell me about my app must want server and database? I am creating one app . please tell me about my app must want server and database ?. database and server important ? ok its important . how can I add database in my app . server important ? how can add and send data to server and send user data (email,password,posts) to server and how to protect and Encrypt that.How to check If the user logged in or registered .

I have created a statistics table. but I want the days to be at the bottom. in android I want the days to be at the bottom

String? != String in kotlin I'm from the java android background. So can someone explain why a variable with type String? cannot be equal to a variable of type String. var a: String? = "Kotlin" var b: String = "Kotlin" b = a // Gives error What's the difference in both the types ? Can anyone explain in java ?

Android Parcelable Issue - ClassNotFoundException when Unmarshalling I have an object list as follows: data class MyProduct( var id: String?, var name: String? ) : Parcelable { override fun writeToParcel(parcel: Parcel, flags: Int) { parcel.writeString(id) parcel.writeString(name) } override fun describeContents(): Int { return 0 } companion object CREATOR : Parcelable.Creator { override fun createFromParcel(parcel: Parcel) = MyProduct( id = parcel.readString(), name =...

Suspend function inside a Coroutine with delay is not working I have the following Coroutine which calls a suspending function, adds a delay afterwards and displays the result to user CoroutineScope(Dispatchers.Main).launch { //some initial setup val result = service.getResult() //suspend function //add a delay of 1s delay(1000) when(result) { ERROR -> { Toast.makeText(activity, message, Toast.LENGTH_LONG).show() } //other conditions } } When I add the delay, the code under it never runs. Being a...

does okhttp check for whether the response is complete or not for chunked responses I am receiving a big file from the server which I cannot hold in memory, hence receiving it in chunked encoded response and reading it through the okhttp Response.body().source() into a buffer and writing it to a file as below. val downloadFileBuffer = ByteArray(1024) client.newCall(request).enqueue(object : Callback { override fun onFailure(call: Call, e: IOException) { Log.d("DOCUMENT_CONVERSION", "FAILED", e) } override fun...

How to create valid POST-request with "Content-Type: application/octet-stream" data via Retrofit? There's some url to send POST-request(Content-Type: application/octet-stream) with some base64-string. I tried this(with/without @Headers): @Headers("Content-Type:application/octet-stream") @POST("some_url") suspend fun uploadData(@Body request: String): Response uploadData(request).body().string() returns an error from server. And there's one thing left: uploadData(request).headers() returns some parameters, including "Content-Type: text/html". Why? And tried to put @Header tag into...

declare findViewById 'global' I'm pretty new to android development with Kotlin and I want to declare Buttons and TextViews at the start of my program. So that I can use them in the entire program. Now the following code works like intended, but as we can see, I have to use it two times and I want to avoid this. var labelOutput: TextView = findViewById(R.id.textVIewOutput) class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

Problem with saving data of a profile in Firebase database I want to create a profile in my app, where I can edit or add some information when logged in. It already works with the checkbox but not with the other editText items. Also I want to show the saved information after I closed the app in the profile. Any idea how I could do this? Like changing an editText to a textView or is there any other way? Here is my code of the fragment Profile: (I tried several options to save data in the firebase database) package com.example.discoverme import...

How to get data from firebase with kotlin coroutines I can get data from a rest api using Kotlin coroutines but failed for firebase Car.kt data class Car ( var carID : Long, var carBrand : String, var carModel : String, var price : Double, var status : Boolean, var carImage: String ) MainActivity.kt val y = MyClass() GlobalScope.launch(Dispatchers.Main) { carList = y.getCars() //is working for(car in carList!!){ car.carImage = y.getCarImage(database,car.carID). .toString() //get...

How to play media files, whose names contain "#" with ExoPlayer? Yes, there were questions like that, especially this one(and my error is the same). But my player based on UAMP(by Google) and I don't have control with Uri.parse(), etc. My endpoint is mediaController.transportControls, where "mediaController" is MediaControllerCompat. What am I supposed to do?

Kotlin + Hibernate + UniqueConstraint = org.hibernate.AnnotationException I have Kotlin and Hibernate in project and I need to make coupled unique constraint (whoUuid and toUuid have to be unique only in pair), so I have such model: import org.hibernate.annotations.GenericGenerator import javax.persistence.* @Entity @Table(name = USERS_TO_USERS_SUBSCRIPTION, uniqueConstraints = [UniqueConstraint(columnNames = ["who_uuid, to_uuid"])] ) internal data class UserToUserEntity( @Id @GeneratedValue(generator="system-uuid")...

How to copy 2D list in Kotlin? I want to create a deep copy of a list of lists as shown below: var original: MutableList = ...

Toast.makeText not showing (not .show) As the title states, I am trying to get my Toast.makeText to show a message, but it isn't showing. I'm not sure if it is my xml file or something. Below is the code in kotlin. LockButton.setOnClickListener { if (i == 1) { Toast.makeText(this@MainActivity, "Unlocked!", Toast.LENGTH_LONG).show() GlobalScope.launch { val url = URL(ipcomm2) val con: HttpURLConnection = url.openConnection() as...

How to make cardview music in xml?

Can you make the popup in a dropdown menu center the list around the currently displayed item? I've recently started coding in Kotlin in Android studio and i've semi-succesfully implemented an exposed dropdown menu following the material design guidelines. However, I'd like for the displayed list to show the item currently selected rather than the start of the list if possible (eg. scroll down to item 40 if the item 40 is selected rather than display the first few items and having to scroll all the way down. The code in the activity_main.xml is The code used for the...

How to send a HTTP GET with a body in retrofit? I am trying to launch a request but it throws an error in kotlin method GET must not have a request body. @HTTP(method = "GET", path = "Users/profile", hasBody = true) fun getProfile(@Body requestProfile: RequestProfile): Deferred but if i try from postman it works fine By the way, I know it is better to switch to POST. Using GET is not a good idea, but at the moment I won't be able to do it since they defined it that way.

Why my HomeFragment of my navigation drawer need (after change a textview) to be reload to show the textview fully and after that it work perfectly? I'm working on my first real app, but now i've bug. I've a navigation drawer which have a HomeFragment, and it have button and a textview, when i click in the button the texteview need to change, it change. BUT the text doesn't appear as it should be, this is the problem. And when I put the application in background and come back in the app, the fragment refresh (activity cycle) and all is perfect. And after the first refresh it's always perfect even if we change the Fragment with the...

Problem to deserialize JSON class Kotlin with Spring Boot JPA I'm having a problem with a Rest API with Spring Boot JPA and Kotlin. An error is thrown every time I try to insert a new record using the POST endpoint. The error log that appears: JSON parse error: Cannot construct instance of com.lp3bmobi.paintcar_workshop_api.model.VehicleType (although at least one Creator exists): no int / Int-argument constructor / factory method to deserialize from Number value (3) VehicleType Class @Entity @Table(name="vehicle_types")...

Getting Datastore value for constructor injection, remove runBlocking{} synchronous block I am building an app that sends the user's FCM token as an Authorization header to my server for each networking call. (Please correct me if this is a terrible idea as well.) I have it working correctly, in some manner. One exception, I'm using runBlocking{} to get the value from Datastore. I understand this is bad practice as it negates one of the key points of using Datastore over Shared Preferences. My question is; How can I get this value for constructor injection without using...

Aligning a resized TextField in Jetpack Compose I am having problem aligning a resized TextField in Jetpack Compose for Desktop. When I resize the width of the TextField, the TextField automatically adjust itself to center position on screen. I have tried using Modify.Align and it did not work. Can someone help? Here is my code @Composable fun addSales(sales: Sales, actionChangeSales: (sales: Sales) -> Unit, actionQuantityInc: (() -> Unit), actionItemNameInc: (() -> Unit)){ Column{...

How to passing image view from fragment loaded by retrofit to childfragment? so i have 1 main fragment and 2 childfragmnet, i want to pass the image view from main fragment to childfragment without Get Request retrofit again in that 2 childfragment how to do that?? i have already try this in my main Fargment : private lateinit var imgFile: File ...... intent.putExtra("resId", imgFile) and than call that in child fragment : val bundle: Bundle = intent.extras val resId: Int = bundle.getInt("resId") binding.imgmainac.setImageResource(resId)