Run ViewModel method as a reaction on composition I have a top-level composable representing some app screen, which uses 2 view-models (for clarity). ViewModel_B starts some network activity once created: Once network request finishes, it updates state_B: MutableStateFlow inside ViewModel_B which is observe from our composable. And that state is, for example, Loading | Error | Success enum, and let's say Success contains some payload: When it's Success, I want my ViewModel_A to start another activity, which would in turn affect another...

How to properly get results from mlkit? I'm working on my first android app and I'm trying to do some OCR using mlkit. I've written a class that receives several images, analyses them and save results in a room database, and this part works. However I can't get the return on the code that uses the class (I'm assuming because it's async - correct me if I'm wrong). Here's the code where I call my class: override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

Compose component inside xml is not redrawn when fragments are being replaced I have added a compose component in a custom view XML which is added from a fragment, where the project is using a navigation graph library. But when I navigate from this fragment and come back the UI(XML) will be restored except the composed component inside it. It looks like the entire UI is getting redrawn without the collapse component when the fragments are being replaced. compose component inside xml ... ... and setting up here...

Retrofit ScalarsConverterFactory.create() doesn't effect to error "Expected a string but was BEGIN_OBJECT at line 1 column 2 path $" I am trying to get request from a currency API and it's Json type is like this. { "eur":{ "code":"EUR", "alphaCode":"EUR", "numericCode":"978", "name":"Euro", "rate":0.99540765179992, "date":"Tue, 12 Jul 2022 23:55:01 GMT", "inverseRate":1.00461353516 }, Here is the link of JSON http://www.floatrates.com/daily/usd.json Even I try some solutions on here I couldn't effect to that error below...

Is it possible to remove bottomNavigation Bar while moving from one fragment to another fragment? I want to remove bottom Navigation bar while moving from one fragment to another fragment. This is how I am trying to remove bottom Navigation bar. class LoadFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate the layout for this fragment val view = inflater.inflate(R.layout.fragment_load, container, false) val bottomView =...

Why covariance is needed in the following example? This might be a dumb question but I cannot wrap my head around this example: open class Case {} class InheritedCase: Case() fun getCase(): Case = InheritedCase() Can someone explain why out must be specified and why a compile error is thrown when only using String?

Saving SQLite database in Excel format I am writing an application on a Boiler in which data is saved to a database, I know that the database is saved in a folder that is not accessible to the user or other applications, and the question is: is it possible to implement the database saving function in the application in csv or excel format, so that later it could be transferred to a computer. Is this possible? If so, how to do it in Kotlin? And is it possible to transfer the edited data back to the database after editing on the...

How to check if one composable is on the same y position to another? (Arrow indicates to element from the scrollable column) I want to change the item image (above the arrow) depending on the pokemon on the right. User can vertically scroll items. I need to get the item which the arrow indicates on and handle indicated item change caused by scroll. Example: arrow indicates on "Vaporeon" User scrolls to "Jolteon" (this yellow item) While the user is scrolling, the image above the arrow should change to an image related to "Jolteon" at the moment of starting indicating on him Image stays as is until the arrow is...

Why do I get classNotFound exception Although I have added my class name in manifest? I am trying to implement Dagger hilt in my project for dependencies injection. I have MyApplication class which extends Application ,I have added this app in manifest.xml file too ,When I build the code every thing works fine, but when I run it my app crashes with below errors. It throws run time exception with class not found exception . Error 2022-07-13 18:30:42.953 23036-23036/? E/pendencieinjec: Unknown bits set in runtime_flags: 0x28000 2022-07-13 18:30:43.414...

Runtime JAR files in the classpath should have the same version. These files were found in the classpath: I have problem with pipeline test on branch and master although it used to pass on the master before. Today i update Android Studio, this can this can cause errors? I run on branch: ./gradlew assemble i get error: w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath: /Users/ddlugosz/.gradle/caches/transforms-3/d749d7039f211123753228b7812f7d3e/transformed/jetified-kotlin-stdlib-jdk8-1.5.10.jar (version 1.5)...

How to mock a binding method in Dagger 2? So, I'm trying to test my Dagger2 application with Espresso; to make quality tests I'm mocking some of the services using Mockito with DI. So far, I've been able to do it straight forward, until I had to mock a @Binds-annotated method and received this error: Binding methods may not be overridden in modules Am I misunderstanding something? What is the proper way to approach this? Here's a little example to help understand my situation: @Module(includes = [XBindingModule::class]) open class...

How to zoom on a specific image from url on webview AndroidStudio By using a Webview I'm trying to display only the QRcode from this url: https://app.ethiomobilemoney.et:2121/ammwebpay/#/?transactionNo=202207131604471547205398120337410 which is located at the center of the webpage. So my idea was to zoomIn on the webpage until only the qrcode is visible. This is my xml file. ' And this is my java code: public...

how can i solve GoogleApiManager SERVICE_INVALID for App with Location permission? i'm new to coding and as a final project on a course I decided to build and Android app, since it's what I want to focus my studies later (kinda regret it now...). My idea is about an app that will have GPS services and actions based on GPS locations, so I started following tutorials from the basics up, now i'm following a basic tutorial about a GPS app (in Kotlin) that just displays the current location with an on/off switch. I'm still getting familiar with Android Studio and all the methods...

How can I add items sepratedly from childlayout? I develop a calculator, I have to add constraints and variables, but at the end of the constraints I just want to add spinner, how can I add spinner just at the end of constraints? I am using just one child_layout

Observe the state of a Worker withou LiveData So, I am using workmanager to retrieve data from an FTP server. I have to display one type or information or another type deppending on the state of the worker. I was using getWorkInfoByIdLiveData on the viewmodel and I was observing the state of the worker on the activity. But, as the Observer is almost deprecated I am trying to use Flow instead. The problem that I have is that I don't know why, I can't use the asStateFlow() on the livedata. <a href=""...

MaterialAlertDialogBuilder with custom itemsText I use a MaterialAlertDialogBuilder which display as: But I would like to display it more like button: I already tried to use a custom listItemLayout() but it doest not change the layout. I tried to put an array of button instead of text but in this case I can not catch the click on the button. My actual code is: val itemsText =...

Is there any opposite of the findFirst() in a stream? in my java application i use the following stream: columns.stream().map(columnEncryptors::get).findFirst().ifPresentOrElse(columnEncryptor -> columnEncryptor.encrypt(bankTransaction), () -> {throw new IllegalArgumentException("No encryptor");}); The list met columns contains 9 strings, but he is only using the first one and not the other 8. Is there a operation that can do this? Thanks! :)

error message showing on Oncreate function in the android studio I have tried searching the internet but didn't got much help . if anybody know how to resolve this please help. the error image is in the link please have a look at it. in this jam creating sign-up page whenever I am clicking on the signup button to go to signup page the app closes automatically and this 👇👇 errormessage is shown. at com.example.projectmanagementfnc.SignupActivity.onCreate(SignupActivity.kt:13) // XML file [enter image description here][1]...

Preventing mistakes with property declaration order I'm looking for a way to prevent problems in Kotlin with the order of property initialization. One of my biggest loves of Kotlin is all the ways you can lean on the compiler to prevent errors. But in this case it falls flat. Here's an example class Test{ val b = computeB() val a = computeA() private fun computeA() = 4 private fun computeB() = a + 1 } fun main(args: Array) { val a = Test() println("value of b: " + a.b) println("value of a: " + a.a) } In this...

Maven Compiler Throws Kotlin Version Error I am trying to build a Kotlin project on maven. I am using the kotlin-maven-plugin version 1.7.10. But every time I run mvn clean install -e, I keep getting the error: Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.7.1, expected version is 1.1.16. Now I will be honest, I dont know much about Kotlin. So some pointers on this would nice. I have tried adding the apiVersion tag in the plugin and set it to 1.3, but that did not...

How can I put a parent value into a child object using Jackson JSON deserialization with Kotlin? let me prephase this by saying that this question is similar to Reuse value from parent object to construct child when deserializing with Jackson, but different enough that I think it warrants a new question. Like in the original question, I'm having the same problem that I want to repurpose a field set on an outer JSON object on a inner object when...

How to check how many ' ' empty spaces in the String - Kotlin I got a string Hello I am Android how can I count how many empty spaces in this string? So I need it return Int value 3

Jetpack compose Drawing over shapes I have this interesting problem in a project, where user should be able to draw the same shape over the defined shape, i have achieved this so far, but i want to check if he/she drawn over the shape correctly in ONE GO. if the finger goes outside the sqaure the current drawing should reset and put a toast message as unsucssesfull else says succesfull, How do i check if the drawing is on the Square? The white square...

How do you define private instance variables in Kotlin? So im trying to define a private class in kotlin/android studio. Am not sure what is going on, but i tried searching up videos on how to create a private class on kotlin. I stil don't think I know what to do. Any help? package com.example.calculator import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import android.widget.EditText class MainActivity : AppCompatActivity() { private EditText display

testing the diff between coroutin and thread, I can't get the OOM error when using thread in kotlin I'm studying coroutine now, and testing some difference with thread. stydying with the kotlin docs, I copied some test code and changed the code for testing thread. the docs said https://kotlinlang.org/docs/coroutines-basics.html#coroutines-are-light-weight If you write the same program using threads (remove runBlocking, replace launch with thread, and replace delay with...

Align Text and Image vertically inside Row in Compose I've got a Row with a star Image and some Text inside. I've been trying to make them align vertically whilst keeping the Text height flexible but they're always a bit off (see screenshot). @Composable fun MyRating() { Row( modifier = Modifier .background(color = Color.Green) .wrapContentSize(), verticalAlignment = Alignment.CenterVertically ) { val text = buildAnnotatedString {...

video disappears when setting match_parent in webview I have a webview in which video is played, if you set the size of the webview, for example, 200 to 200, then everything is ok, but when installed programmatically android:layout_width="match_parent" android:layout_height="wrap_content" then the video disappears from the screen, the screen becomes black. While the stream from the video continues to play as the music from the video continues to play. How I can fix it ? ......

Is Google's ML Kit available outside of Android? I'd like to use the barcode scanning functionality that comes from Google's ML Kit outside of Android (in my own Kotlin application that will run on a server). Is that even possible? If yes, how? I successfully imported it using Gradle but Gradle downloads these .aar files which I suppose are not compatible with regular Kotlin projects.

Koltin inner class extends inner class in outer class with parallel hierarchies but give Unhandled JavaScript exception class QualifiedCalls { var name = "QualifiedCalls" open inner class Outer1 { open var name = "Outer1" open inner class Inner1 { open var name = "Inner1" var superResult: String constructor() { this.superResult = this.name + this@Outer1.name + this@QualifiedCalls.name } } } inner class Outer2 : Outer1() { override var name = "Outer2" inner class Inner2 : Inner1 { override var name = "Inner2" var result: String...