Navigation bar - show, hide home and recents buttons Is it possible to hide only home and recents button on system navigation bar ? I see that there is only possibility to show/hide whole system navigation bar, but I would like to stay with only back button visible.

Gradle error shows "Could not resolve all files for configuration ':app:debugRuntimeClasspath'." When I build the project the error says, What went wrong: Execution failed for task 'appmergeDebugNativeLibs'. Could not resolve all files for configuration 'appdebugRuntimeClasspath'. Could not find com.android.supportmultidex2.0.1. my app build.gradle looks like this; apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' apply plugin: 'com.google.gms.google-services' android { compileSdkVersion 31 buildToolsVersion...

How to transform/update one flow depending on another flow? I have a two flows. One is a list of products updated by network calls and the second flow is a list of products read from a local SQLite database (using Room). Storefront flow Get all products --- Network ---\ Search products --- Network ------- List ---> data class Cart ---> Flow Filter products --- Network ---/ Cart flow Load Cart from SQLite --- Room ------ Flow ---> Flow The List read from SQLite will have the latest quantity, read using a flow. And I would like this quantity to...

How to test callback call with Mockito and PowerMock So I have this type of code. Simplified as much as I can. class Callback { fun onEvent(){} } class MyClass { fun doSomething() { StaticClass.getMeAnObject().callFunction(Callback()) } } I want to test Callback::onEvent(). Here is what I tried to do @RunWith(PowerMockRunner::class) @PrepareForTest(StaticClass:class) class MyTest { @Test fun testCallback() { val objectMock = mock(ObjectReturned::class.java) mockStatic(StaticClass::class.java)...

Ktor WebSockets: kotlinx.serialization.SerializationException: Serializer for class 'DefaultClientWebSocketSession' is not found today I was on the way to make a real-time Application and I wanted to use WebSockets for updateing my states. Everything worked well until I got this Exception: kotlinx.serialization.SerializationException: Serializer for class 'DefaultClientWebSocketSession' is not found. Mark the class as @Serializable or provide the serializer explicitly. I searched and searched and I didn't find anything. So my code looks simliar to this: Gradle Imports: implementation("io.ktorktor client core1.6.2")...

For what purpose is packagingOptions used? Something I noticed in build.gradle when I use android studio canary. What exactly is its intended use? packagingOptions { resources { excludes += '/META-INF/{AL2.0,LGPL2.1}' // ??? } }

cant use handler to start fragment with delay I want to set SplashScreen(fragment) in my app and because its a online shopping application I should check for internet connectivity. I have 4 main fragment and one main activity in this app. I used progress bar ,textview and a refresh button in splash fragment. lets see part of code!... val networkConnection = NetworkConnection(requireContext()) networkConnection.observe(requireActivity()) { isConnected -> if (isConnected) { binding.refresh.setOnClickListener {...

Get instance of viewPager from fragment class So I have a viewPager with a few fragments, I want to be able to programatically change viewPager screen. For example if I am in fragmentOne, I want to be able to change to fragment to next one when user clicks a specific button, and that button is in fragmentOne layout. I have attached code snippet. class OneFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate...

Convert gradle implementation to gradle id I have a dependency for AWS Secrets Manager which I want to use, but my project works with gradle plugin and id. implementation("com.amazonawsaws java sdk1.12.37") How should I use it ? I tried the way below, but it didn't work: id("com.amazonaws.aws-java-sdk-secretsmanager") version "1.12.37"

Backbutton not working when trying to navigate back from fragment to viewpager2 I have a Button in my viewpager2 which navigates the user to another screen, where they can change their password etc. The problem I encounter is that the back button on the screen they navigated to is not working (e.g when the user presses back and or the toolbar button, nothing is happening / the user is not navigated back to the viewpager2). The only error I then get is: SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length. Graph Picture (trying to navigate from x to y): <a...

Parameter specified as non-null is null issue I'm getting the above error message when mapping a response object to model. I've marked the parameter as nullable but i'm being told I haven't? I pass null as parameter to function but my understanding is marking the param as nullable allows this to work? "Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkNotNullParameter, parameter lastOrder" fun contentBlockResponseToModel(contentBlockResponse: ContentBlockDataResponse, lastOrder: LastOrder?): List {...

Android: Manage request app permission from a module Good morning everyone. what i am trying to do in the app is the ability to manage the different requests outside the app module. In particular, I am following the documentation and best practices to implement a request. Currently the function that an Activity or Fragment should call is the following: fun requiredPermission( activity: Activity, requestDialog: RequestDialog ) {...

Add and Remove Views in Android Dynamically in Kotlin I modified my code by referring to the "https://www.tutorialspoint.com/add-and-remove-views-in-android-dynamically-in-kotlin". There was no error in my code, but the view added when running in the app was not visible. I have no idea what the problem is. Please help me!! Activity to which the view is added package com.akj.callback import android.content.Context import android.content.Intent import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import...

How to hardcode a http_proxy setting in Android app written in Kotlin or Java I would like to make my App always access internet via my proxy server, including some 3rd party SDK that make HTTP requests. How can I do that? In python, I can simply achieve this by: os.environ['HTTPS_PROXY'] = 'http://my-proxy-server-ip:1080' I will develop my Android App in Kotlin or Java, how can I do this?

Why @JsonProperty not work for camel case properties in Kotlin There is a very simple class: class Price( @JsonProperty("YPRICE") val yprice: String? = null, @JsonProperty("ZPRICE") val zPrice: String? = null ) And the following code to serialize to string: val mapper = ObjectMapper().registerKotlinModule() mapper.writeValue(System.out, Price()) The result in console is: {"YPRICE":null,"zprice":null} If changing the property of zPrice to zprice, then the result changes to: {"YPRICE":null,"ZPRICE":null} And if changing the property of...

Firebase database set value doesn't change the value first I'm beginner I'm trying to upload some data to firebase and its collection of objects, so I convert it to JSON format and upload it as String just like saving arrays in SharedPreference (i mean the idea to convert array to string) here are the rules: { "rules" : { ".read" : true, ".write" : true } } here is the Data Class: data class Content( val books: List, val poems: List, val proses:List I create a class to manage all processes with...

How to break kotlin when clause? Suppose that I have code in Java @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getActionMasked()) { case MotionEvent.ACTION_DOWN: { if (something()) { break; } // do more stuff here break; } } return false; } I rewrote it for something like this, but I'm not sure it's correct and it doesn't have any flaws. override fun...

How to store external keys / secrets in android strongbox? I am working with android jetpack security at the moment. I want to store external generated keys/secrets in my android app. Is there any way to write external keys in the android keystore? Best way for me would be a way where i can save external secrets in android keystore strongbox. If the device has an secure element, is there a way to write / talk to it directly?

Event class not working: Runtime error Unresolved reference getContentIfNotHandeld() For whatever reason, I am always getting an "unresolved reference: getContentIfNotHandeld()" when I am trying to use the Event class in android. What makes this more weird, that I can click on the function, and it will navigate me to the place where I can find it. Furthermore, there is no compile time error, only an runtime error. Same goes with my extension function for the livedata: fun LiveData.observeEvent(owner: LifecycleOwner, onEventUnhandled: (T) -> Unit) { observe(owner) {...

Lag in spring boot kafka consumer? how to fix? There is a problem : I work with the spring boot service consumes messages from kafka. It often happens service remains in working state, but messages from the topic are not consuming and the lag is increasing in this consumer-group for this topic, why it happening? Why there is no consumer`s reconnection? Is it possible to configure it?

Jetpack-Compose ModalBottomSheetLayout throws java.lang.IllegalArgumentException with initial state "Hidden" By playing with a ModalBottomSheet in Compose, I get the following issue: java.lang.IllegalArgumentException: The initial value must have an associated anchor. My composable function has: a ModalBottomSheetState and a CoroutinScope, a ModalBottomSheetLayout with, a Scaffold as bottom sheet content. // 1. val sheetState = rememberModalBottomSheetState(ModalBottomSheetValue.Hidden) val coroutineScope = rememberCoroutineScope() // 2. ModalBottomSheetLayout( sheetContent = { /*...

Return a function (that returns a string) inside a function with kotlin I'm trying to return a function (that returns a string) inside of function but, since I haven't made this explicit (I'm not sure how to make it so that the function knows it'll return a function), I get kotlin.Unit as a result. This is the function: fun takeOutArticle(code:String) { fun onSuccess(finalPrice: Int): String { return "Your price is $finalFee." } fun onError(): String { return "Error." } val articlesCode =...

Kotlin doesnt get the data from the binding viewModel I'm trying to get the data that the user is enter in the autocompleteview but i doesnt receive it in the viewModel. There's the xml file, There is the viewModel, in the insertUpdate function I'm trying to display the connectionMailId. The connectionMailId display an empty string when I want to display ion the logs class ConnectionViewModel( val database: ConnectionDataBaseDao, private val app : Application) : AndroidViewModel(app){ private val...

EDITAR STRINGS RECEBIDAS DA API class TipoTarefaAdapter(val clickitem: (String) -> Unit) : RecyclerView.Adapter() { private var mTipoTarefaModel = mutableListOf() inner class tipoTarefaViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { fun geraItem(mTipoTarefaResponse: TipoTarefaResponseModel) { with(itemView) { txt_item_tipo_tarefa.text = mTipoTarefaResponse.descricao.replace("SEPARACAO", "SEPARACÃO") } itemView.setOnClickListener {...

Kotlin: app crashes when opening ImagePicker Kotlin noob here. I just want to ask what does this error mean? 2021-08-03 002956.272 15335-15335/com.sakura.sakurafreemarket E/AndroidRuntime: FATAL EXCEPTION: main Process: com.sakura.sakurafreemarket, PID: 15335 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sakura.sakurafreemarket/com.esafirm.imagepicker.features.ImagePickerActivity}: java.lang.ClassCastException: o3.a cannot be cast to q3.a at...

How do I return the result from a RecyclerView adaptor back to the MainActvity.kt? How do I return the result of the position from my Recyclerview Adapter, back to the MainActivity.kt? Any help on how to achieve this in Kotlin would be really appreciated! Thanks Adapter.kt class UsersAdapter( private val users: ArrayList ) : RecyclerView.Adapter() { class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { fun bind(user: User) { itemView.textViewUserName.text = user.name...

Using RxJava to generate a map where keys are values of a Kotlin enum and map's values come from another RxJava stream Introduction Let's say I have a Kotlin enum class: enum class Type { ONE, TWO, THREE, FOUR } and a following data class: data class Item( val name: String, val type: Type ) Then I have a Single that emits a list of Items – can by anything but for example purposes, let's say it looks like that: val itemsSingle = Single.just(listOf( Item("A", Type.ONE), Item("B", Type.ONE), Item("C", Type.TWO), Item("D", Type.THREE), )) Problem What I'd like to achieve...

GCM encryption built in MAC check failure I am trying to write a couple functions that can encrypt and decrypt text using AES/GCM encryption in conjunction with PBKDF2 key generation. I am transitioning my code from CTR (SIC) encryption, and the MAC check failure is killing me when all else is working. fun encryptAESBasic(input: String, password: String): String { val masterpw = getKey(password) val random = SecureRandom() val salt = ByteArray(16) random.nextBytes(salt) val factory: SecretKeyFactory =...

How Do I Compute 1-dimensional Perlin Noise in Kotlin For educational purposes I want to implement the 1-dimensional Perlin Noise algorithm in Kotlin. I familiarized myself with the algorithm here and here. I think I understood the basic concept, however my implementation can return values greater...

Kotlin - Random numbers without repeating I have a question, how to prevent random numbers from being repeated. By the way, can someone explain to me how to sort these random numbers? override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val textView = findViewById(R.id.textView) val button = findViewById(R.id.buttom) button.setOnClickListener { var liczba = List(6){Random.nextInt(1,69)}...