Error defining a list with a templated class I have the following: data class GenericItem (val id: Int, val data: T) I am trying to define a generic list as follows: val rows: List but I get an error: one type argument expected for class GenericItem What am I doing wrong here and how can I fix it?

Android viewmodel transformations map not working I have a view with button - My view code - private val viewModel: MyViewModel by viewModel() override fun onCreateView(...): View? { //Button click view.getMyData.setOnClickListener { viewModel.onGetDataClicked.observe(this, Observer { view?.progressBar?.isVisible = it.loading view?.description?.text = it.data.value }) } return view } My view model code - val viewState = MyViewState() val...

Why is UI not updating sometimes using recyclerview and data binding? I'm creating a to-do app using MVVM with Room, LiveData, a RecyclerView with ListAdapter and data binding. When I check off an item, it jumps to the bottom of the list (sorted by incomplete, then complete). I'm also using a different layout for completed items where the text becomes italic and grayed out. Usually when I check a box, it jumps down and turns gray/italic, but sometimes it stays black. How can I track down this issue, or could it be a problem with the data binding library? //...

What networking library do you use and why? [on hold] I have been writing Android code with Java for some time and have become accustomed to using Retrofit and Volley for network calls. This new project that I am on requires me to write in Kotlin. So, I was wondering what the more popular libraries are when using Kotlin Additionally, I use the com.squareup library for retrofit, and blindly didn't know there were about 15 other libraries available. Likewise, I use the Google Volley dependency and found that there were several other libraries...

Firebase Authentication: Sign out when app gets killed I have an Android App that allows users to create a user account, but also to continue without a user account. The Authentication is done with Firebase. The MainActivity is the Login-Activity. Here, the user can choose to login or to continue as guest (without user account). If they login, they can choose whether they want to stay logged in or not when they close the app. I want, that when they continue as guest or when they check the stay-logged-in-checkbox, they get directly navigated to...

How to fix "expecting member declaration" with recyclerview I have created a RecyclerView but when I attempt to assign a layoutManager to the view I get the ubiquitous "Expecting member declaration". I am using androidx. There seems to be a number of other problems with this error, but I can't align the solutions with my problem. I have tried the Build -> Clean approach with no joy. I have tried applying lateinit for the recyclerview import android.content.Context //import android.support.v7.app.AppCompatActivity; import android.os.Bundle import...

call from java the kotlin's function -> lambda expressions are not supported in -source 1.7 In my android project in app/build.gradle: android { compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } compileSdkVersion 29 defaultConfig { minSdkVersion 21 targetSdkVersion 29 versionCode 1 versionName "1.1.1" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" // Enabling multidex support. multiDexEnabled true and in...

Kotlin. How to execute code on a button up event Kotlin. How to execute code on a button up event Hi . I'm new to android. How do you handle a button up event? I can get a onclicklistener working,but need to execute code when button released btnDownFast.setOnKeyListener(View.OnKeyListener { v, keyCode, event ->

How can I use the response result of an RXJava call as a condition for an if statement inside another RXJava function? So I know this is convoluted, please bare with me. I am making 2 RX calls that are nested within each other and are co-dependant. There is an issue with the server (which cannot be solved right now for various reasons) which returns errors in the 2nd nested call. Until this gets solved, I need to have it that if the 2nd call returns an error, the results of the first call are discarded as well. Right now, the entire iterative process stops the moment any of these error responses occur, and...

How to create context menu for RecyclerView using Kotlin i want to popup context Menu on long click RecyclerView items using Kotlin code

Use of Either<L,R> with Firestore I'm trying to use Either with Firestore , the function I have is this one fun setDataIntoFirestore(data: HashMap): Either{ db.collection("test") .add(data) .addOnSuccessListener { //Here I need Either.Right(true); } .addOnFailureListener { Log.d("FirestoreData", "Failure: " + it.message) //Here I want to add Either.Left(it) } } I'm trying to do this because I want to...

Dependency for Conversion of EPSG 4326 to EPSG 32644 In Android For that conversion, I need to import one library i.e QgsCoordinateReferenceSystem. But I am unable add dependency file. Can anyone please guide me?

Firebase Auth: Not able to authenticate a mobile number that is no longer whitelisted for test Using a mobile number that was whitelisted for testing in a real world authentication throws an exception, none whitelisted numbers do nott Have tested with a non whitelisted number and this does not throw an exception. In order to test the phone auth functionality of my app, I added my mobile number to the whitelist. After completing the coding and testing. I removed my number from the whitelist and wanted to do a real world authentication. The auth methods throws an exception...

How to change the mouse pointer speed programmatically in iOS and Android I have a wireless mouse connected to my iOS and Android phones. In my app I need to change/set the mouse pointer speed programmatically. I am using iOS 13 and Android 9, API 28. I am looking for code examples in Java, Kotlin, Objective-C and Swift. So far I have been able to change the speed only on SOME Android phones (like Nokia 5) but not others (like Huawei Mate 20) by going to Settings > System > Languages & Input > Advanced > Pointer Speed.

TextInputEditText padding not working inside ConstraintLayout I have TextInputEditText inside TextInputLayout on a ConstraintLayout. I want to set a paddingLeft to the edittext, but it is not working. If I change to paddingStart it is working just fine, but I need paddingLeft: And EditText.OutlinedBox is : 56dp 18sp @null @font/nunito_regular @color/colorTextSecondary @color/colorBrand true Is there any...

How do I use kotlin loop to avoid ANR in android app? I am using kotlin in my android app. I wrote following function for decoding coordinates : private fun decodeCoordinates(address: String) { var lat: String = "" var lng: String = "" var flag = true var count = 0 while (count < address.length) { if (address[count].equals(',')) { flag = false; continue } if (flag) { lat += address[count] } else { lng += address[count] }...

Two way binding with Kotlin I am trying to do two-way binding inside my MVVM based project, but unable to get it working. XML ... Fragment override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { val binding: FragmentCreatePage1Binding = DataBindingUtil.inflate(inflater, R.layout.fragment_create_page1, container, false) val clientViewModel = ViewModelProvider(parentFragment!!).get(ClientViewModel::class.java)...

Why Kotlin blindly change internal classes into public in JVM? As you know the private classes in Kotlin change to package-private under the hood and internals changed to the public. unfortunately, this can lead to the known problem here. if the compiler sees the usage of Kotlin internal classes when it wants to change it to the byte code, it can choose package-private for internal kotlin classes that didn't use outside of the package and choose public for...

How to apply an annotation to a Koin module dependency declaration? I have the following Koin module: val exampleModule = module { single { RealExampleRepository() } } I need to apply two annotations to RealExampleRepository to supress an experimental coroutines API usage warning. The annotations I need to apply are: @FlowPreview @ExperimentalCoroutinesApi How can I do this?

Access the set of abstract properties on sealed sub classes (in kotlin) I'm got a situation where I have a common property that must be defined on each of the subclasses of a sealed class. I'd like the ability to be able to access the set/list of these values without 'duplicating' the list (by hard coding it) Hopefully the below code conveys what I mean sealed class S{ companion object{ // want to avoid typing: listOf("these", "values", please") // instead grab it from the classes themselves val properties =...

Andrroid firebase: pendingDynamicLinkData always null i'm working on email verification. Email reaches the mailbox and when the user clicks on the link it moves him to the application. When I try to get data from link in getDynamicLinks method, pendingDynamicLinkData is null. But i can get the link from intent. Link looks like: (<a...

How to fix android architecture components paging onItemAtEndLoaded get in loop? I am trying to practice the android architecture components Paging Local + Remote Datasource with Room, MVVM and LiveData When i first time scroll the list(get remote data), it get into loop by onItemAtEndLoaded in PagedList.BoundaryCallback, but it scroll smooth when open the activity next time (get local data) Here is my github link here! Can anyone take a look and help me how to fix it, Thanks!...

ViewModelProviders Observable isn't observing a variable Hi I'm working with Observables in kotlin and the Observer isn't observing the variable changes, the same instance of the ViewModelProviders is working in other lines of code but not inside my fragment I have to notify a recyclerview to eliminate a row when the user click on a button and that's why i'm using observables so when the button is clicked the activity finishes and remove the row of the recyclerview Communicator Class val status = MutableLiveData() { fun...

Update Android module I am building a new android application which has multiple modules.I have a module for analytics which will have the changes quite frequently.Is there any way I can update this module without pushing an app update. I am open to write this module in Java/kotlin/React-native. I know that React native has Codepush but for this also I need to push an update for my app. Dynamic modules also do not solve my problem as...

ClassNotFoundException exception when using library I created a common library to use it in my spring microservices. In this library I used some other libraries (example: libphonenumber). I created the jar file and imported it into another project, and I used it without any problem. But when building the project, this exception is thrown : org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'phoneUtils': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to...

Kotlin: Retain, replace or remove each map entry in-place I have a mutable map (a LinkedHashMap to be specific) in Kotlin. For each map entry, I want to conditionally perform one of three actions: Retain the entry as-is Replace the entry's value Remove the entry In old Java, I would probably use an Iterator over the map's entrySet() for this purpose (using Iterator.remove() or Entry.setValue() accordingly). However, I wondered if there is a more elegant, functional approach present in Kotlin to do the same (i.e. apply a lambda to each entry...

Sealed class as an entity I'm trying to solve my inheritance problem with kotlin sealed class and forced problem with hibernate. Here are my classes: @Entity @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.STRING) sealed class LegalGuardian( @Id @GeneratedValue(strategy = GenerationType.IDENTITY) var id: Int? = null ) @Entity @DiscriminatorValue(value = "MOTHER") data class MotherLegalGuardian( @OneToOne(cascade =...

Edittext freezes when calling Editable.clearSpans() inside the onTextChanged Listener The code below crashes if I start typing in the edit text. However if I set some String like "Hello asdf" to the edit text before the listener, the code will run as expected; the "asdf" String will be bold until I clear the 'f' from end of the string then the edit text UI will freeze, no crashes though. It seems like the problem is the it?.clearSpans() method. Any thoughts? editText.addTextChangedListener { val TEXT = "asdf" if (it?.contains(TEXT) == true) { val i =...

FFMPEG command works on terminal but not with Java/Kotlin I'm trying to use an FFMPEG command for concatenating different videos. The command is ffmpeg -i video.mp4 -i video-2.mp4 -filter_complex "[0✌️0] [0🅰️0] [1✌️0] [1🅰️0] concat=n=2v=1a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4 This command works good when I run on Windows PowerShell. But when I try to run with Kotlin code it doesn't work. val firstVideo = "D:\\Videos\\ffmpeg\\video.mp4" val secondVideo = "D:\\Videos\\ffmpeg\\video-2.mp4" val resultPath =...

Kotlin coroutines UI not freezing I've checking the livedata coroutines lately and i get to something i cannot understand. why is this code (When observed) not freezing the UI? val lv = liveData (context=Dispatchers.Main){ var x = 0 while (true){ emit(x++) delay(1000) println(Thread.currentThread().name) } } Thanks.