{ "status": "FAIL", "code": "400002", "errorMessage": "Signature for this request is not valid." } Im trying to get "create order" api from binance pay api to make payments in my kotlin android application. I am following api documentation to build the payload and signature but unfortunately its not working. Im getting this error : "errorMessage": "Signature for this request is not valid." Anyone can help? private fun createSignature(payload: String, secretKey: String): String...

Android checkbox not inflated as MaterialCheckBox as stated in documentation I'm trying to following the documentation from Material 3 for checkboxes: https://github.com/material-components/material-components-android/blob/master/docs/components/Checkbox.md At the very beginning it states: Note: is auto-inflated as via MaterialComponentsViewInflater when using a Theme.Material3.* theme. This does not seem to work for...

How to treat nested entity add/update/delete operations in Hibernate? I once again joined a project which uses Hibernate (Spring/Hibernate/Kotlin to be exact) and have read through a number of Vlad Mihalcea articles to refresh my knowledges about this ORM (this article is of my current interest). What I'm trying to understand is how should I treat add/update/delete operations for nested entities (bidirectional @OneToMany). Here is...

Can sealed class subclass call a inherited method and return subclass? How can I share sealed class methods by its subclass and return subclass themselves? Here we can't use type parameters. Is there a simple way such as simple type cast? sealed class Base { fun customCopy() = when (this) { is X -> copy() is Y -> copy() } } data class X(val x: String) : Base() data class Y(val y: String) : Base() fun main() { val x1 = X("x") val x2: X = x1.customCopy() // Required X, but found Base }

Ktor static content does not work properly I am writing an app with a post function. The post contents will be stored in these paths: const val PROFILE_PICTURE_PATH = "build/resources/main/static/profile_pictures/" const val BANNER_IMAGE_PATH = "build/resources/main/static/banner_images/" const val POST_CONTENT_PATH = "build/resources/main/static/post_contents/" And Route.kt file with this static { resources("static") } When I run the server in localhost, I can get the content. However, when I deploy the backend to the server, I...

How to cast in Kotlin? I want to save a Double variable in an Int variable but I don't know how to do it. in Java I use this: double doubleNumber = (int)intNumber

Copy the text with the font in the Android application In some Android programs, you can copy text with a specific font and paste it in other programs, but how do they work? like this: 𐎢𐎲𐎢 I want to show a text with its font to the user and allow him to copy it, but like the example above, I want its style to be copied as well, but only the normal text is copied. like this: abcd But what I want is this : 𐎷

Utilizing File Api for File Access in Android 11 I'm experiencing some interesting behavior on a few Android 11 devices in regards to reading and writing to external storage. I know some changes were implemented with Android 10/11 in regards to storage but I was under the assumption than an app could access it's own app-specific directories (internal and external) without incident. Any suggestions are welcome. Device #1: Throws the EPERM Error (Operation Not permitted) when writing to the removable external storage card with the following...

How to disappear Dialog when user press outside in jetpack compose I am using custom dialog in my project. I want to open Dialog on IconButton click. I cannot use @Composable function inside onClick in IconButton. I am getting same error with this type question. I am using same approach from this post to solve the problem, then another problem is arise. When we try back button the dialog is not closing, instead it still open all the time....

Query method parameters should either be a type that can be converted into a database column or a List / Array that contains such type. Why? @Dao interface LectureDao { @Insert(onConflict = OnConflictStrategy.REPLACE) fun upsert(lecture: Lecture) @Delete fun delete(lecture: Lecture) @Query("update lecture set attendanceCount = attendanceCount + 1") fun incrementAttendance(lecture: Lecture) @Query("select * from lecture") fun getLectures(): LiveData } Well, I have a problem when I write incrementAttendance function I got this error. What I'm trying to do is I want to increase the absentee status by 1 for a specific lesson....

Kotlin enum map Is it possible to create such a map that is granteed to contain all enum keys as its keys? Here is what I'm trying to achieve but with null-safety garanteed. enum class Product { A, B } private val _products = mapOf( Product.A to MutableLiveData(), Product.B to MutableLiveData() ) val products = mapOf( Product.A to _products[Product.A]!!, Product.B to _products[Product.B]!! )

How do i solve "'return' is not allowed here" in Firebaseauth method? fun login(username: String, password: String,auth:FirebaseAuth): Result { lateinit var Result_: Result auth.createUserWithEmailAndPassword(username, password) .addOnCompleteListener { task -> if (task.isSuccessful) run { val fakeUser = LoggedInUser(java.util.UUID.randomUUID().toString(), "Jane") Result_ = Result.Success(fakeUser) return Result_//'return' is not...

Why am I able to have null values in non-null variables? Here is my kotlin class: class Test{ val x: String = run { y } val y: String = run { x } } The variables x and y both end up as null, despite being declared as non-nullable strings. You can run it here. As you can see, you end up with null pointer exceptions from trying to call methods on x or y. Why is this possible? How can you really have null safety with this in mind?

Remove black tint from IconButton in jetpack compose I am using IconButton in code. I used drawable with different color. When I run the code it shows black think. So what is wrong in here? IconButton( onClick = { } ) { Icon( painter = painterResource(R.drawable.ic_menu), contentDescription = null, ) } Actual Output Expected Output I am sharing my drawable file...

My every project files and class suddenly turned into an strange format Everything was good. Today, i opened android studio my every kotlin classes code and even layout and value files, turned into another format like xml. I don't know what kind of strange reason it is. i am trying to fix this for 2 days now.even i opened my files into some other editors(sublime,notepad)but the problem is still there. i am attaching some screenshots i also tried these couple of...

Does anyone know how to test components in compose without using the modifier to set the testTag? I'm working with the google maps api and google maps has some components to be set, but these components don't have a modifier, only a tag field in the constructor, does anyone know how I can get this tag to perform tests? Polyline( points = it, color = Color.Blue, tag = MAP_ROUTE_TAG ) Test composeTestRule.onNodeWithTag(MAP_ROUTE_TAG).assertIsDisplayed() Error Failed to perform isDisplayed check. Reason: Expected exactly '1' node but could not...

Android Studio: Creating a File Object for Directory in Project Resource Folder I have a folder full of images and videos in my RAW directory. I want to turn this folder into a file object in Kotlin, then traverse all the folders and files within and convert them into media that's usable for my app. The directory that contains my media (I want to convert this into a file object, this is the issue I am having): val basePath = Paths.get("").toAbsolutePath().toString() traverse(db, File("$basePath/app/src/main/res/raw/media1")) // This is a directory, and it's not being...

How to share different layouts depending on the current page in kotlin jetpack compose? I am relatively new to kotlin with jetpack compose and I am having a hard time figuring out how to share the same layout of a page among different pages. The thing is that the layout is conditional to whether the user has logged in or not (among other things). The basic implementation I have looks something like the following code. Now, when I click in a LoginButton in the LoginPage, it changes a isLoggedIn variable in the ViewModels, which in turns triggers recomposition and the proper...

Migrate from MediaController to media3 MediaController - could not find method implementation I'm currently using this MediaController import android.support.v4.media.session.MediaControllerCompat; And I need this function that is the new one https://developer.android.com/reference/androidx/media3/session/MediaController#setPlaybackParameters(androidx.media3.common.PlaybackParameters) I tried adding...

IconButton change position when click in jetpack compose I am using IconButton in my project. I am opening Dialog when I am click on IconButton. Whenever I clicked on IconButton the dialog opens and IconButton little bit shifts other side and back to position when Dialog close. You can see in this . So what is the problem of this? I want to avoid this.. OptionItemStateFul @Composable fun OptionItemStateFul() { val isOptionItemClickAction = remember { mutableStateOf(false)...

How to use ANTLR plugin and generate code in android studio How can I use ANTLR plugin and automatic code generation inside android studio? It gives me java error.

Recycler View with a fragment I'm trying to add elements but it says No adapter attached; skipping layout Don't mind the many findviewbyids it's temporary I created 2 adapters but I don't know where is the problem precisly I don't know if I should attach the adapter on the onCreate or onviewcreated or it's a adapter problem Thank you very much! Codes are below: class MainFragment : Fragment() { private var adapter: ProductListAdapter? = null companion object { fun newInstance() = MainFragment() }...

Kotlin BufferedReader from stream is blocking I'm creating an android app with visual studio on clocking, and I'm trying to make the communication between my C++ server (working perfectly) and my android app. My android socket (client) connect correctly to my serv, i can send message to the server, but when the server is sending message the readText block indefinitly. here the code for the current fragment : package com.example.androidapp import android.app.Activity import android.os.Bundle import android.util.Log import...

What is the difference between readLine() and readlnOrNull() in Kotlin? As mentioned in Kotlin API document, readLine() returns the line read or null if end of file has already been reached but it is the same functionality as readlnOrNull(). So what is the difference here? I know that readlnOrNull() and <a...

Failed to configure data source from application.yml in SpringBoot Kotlin I am using yml file to configure data source. But after executing the jar file, I get the exception application.yml spring: datasource: url: jdbc:postgresql://localhost:5332/dbName username: username password: password driverClassName: org.postgresql.Driver Exception 051350.339 [main] ERROR org.springframework.boot.SpringApplication - Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name...

Which tech stack is most effective for building a custom mobile device keyboard for a mobile app? React Native vs Swift/Kotlin Scoping out the tech stack required to build a mobile app that will be leveraging a custom built search box keyboard integrated into the iphone or android device. The search box will query a chatGPT server and return a text response in the keyboard. My question is can I use React Native for custom mobile phone keyboards? Or with that level of device control is it necessary to build the app in the native phone language e.g. Swift/Kotlin? Based on the memory limitations <a...

How to fit the view to the size of the object? (Kotlin) I'm building my first game in Android Studio. Right now, dots fall from the top of the screen down to the bottom. For some reason, in Layout Inspector the view of each dot is the entire screen even though the dots are comparatively small. This negatively affects the game since when a user presses anywhere on the screen, it deletes the most recently created dot rather than the one pressed. I want to get the dot's view to match the size of the actual dots without effecting other functionality....

Invoke function whenever any property of an object is changed in Kotlin I want a function onAnyChange() be called whenever any property of an object is changed. Ways to do this would be Define a setter for each property and call onAnyChange() in each Define one function that takes a property name as argument, sets the property via reflection and calls onAnyChange(). Use only this function to change properties. Is there a more convenient way to do this? Seems to be possible e.g. in JavaScript: <a...

NavigationView closes instantly When I try to open the NavigationView, it closes instantly so as it's not even shown at all. When I double click to open it, it shows for a brief second before closing again. My MainActivity class: class MainActivity : AppCompatActivity() {private lateinit var drawerLayout: DrawerLayoutprivate lateinit var navigationView: NavigationView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val toolbar:...

Blockchain Integration in Android I have seen many tutorial on blockchain but they all are some how assuming the learner to be web developer or kind of related field. Is there some stuff for android developer to learn so that we can use android studio with blockchain technology.? if yes then please provide some resecures.