How can I create the function for this? It should display the sum of the numbers of Odd or Even from 1 to the input value fun main(){ print("Enter a number: ") val a = rdInt() print("Display the sum of odd numbers[Y/N]: ") val choice = rd() var isOdd = false if(choice.equals("Y")) isOdd = true sumOfOdd(isOdd, a) //create this function } private fun rd() = readLine()!! private fun rdInt() = rd().toInt() The output should be like: Example 1 Enter a number: 7 Display the sum of odd numbers[Y/N]: Y The sum of odd numbers from 1 to 7 is 16 Example 2 Enter a number: 7 Display the sum of...

Android Base64 Image is not sending correct code I am trying to send Base64 Image (captured by camera) to server using volley but the sent data of image are not correct therefore I get error in server and not able to store the image. I also tried to read the Base64 code with online tools and none of them were able to read the code as well. Sample base64 from my device This is what actually being sent to server....

How to get SMS threads I'm trying to get a list of SMS conversations on Android. I made this Kotlin code: val threads = contentResolver.query(Telephony.Threads.CONTENT_URI, null, null, null, Telephony.Threads.DATE) This throws this error: java.lang.RuntimeException: java.lang.IllegalArgumentException: Invalid column null I don't think am querying it the right way. What can I do to fix it? Thank you in advance.

Kotlin Native convert ByteArray to ULong/Unsinged Long How to convert a ByteArray to ULong in kotlin. val byteArray = byteArrayOf( 0, 0, 0, 0, 0, 0, 0, 1 )

Write a native code as background to get data from golang server I have created a golang server which communicate well with my flutter code and I can get messages from the server but only when my app is running My problem is that if the app is not running I can’t get data from the server So I went though the internet and asked some friends about the problem All I got It’s I need to implement native code to my golang server so from native code I will create a channel to my dart file But I don’t know how

App Reject By Play Console Please Help to Resolve this Please see this image receive from Play Console after by Tournament Application Rejected Please Help me to resolve this issue... Thanks in Advance.....

Kotlin: Incompatible types: String and Int I tried to code this on kotlin: fun main() { val number = 9 when (number) { is String -> println("Number is String") !is String -> println("Number is not String") } } But an error appears: Incompatible types: String and Int. Shouldn't what should appear is the words: "Number is not String"?

Kotlin ClassName::class.java vs MainActivity::class.java [duplicate] What is the difference between "ClassName::class" and "ClassName::class.java" in Kotlin. I know that ::class returns the runtime-class. But here both Log-statements ... Log.i("onClickListener", MainActivity::class.toString()) Log.i("onClickListener", MainActivity::class.java.toString()) ... return basically the same.

AutoClearedValue accessed from another thread after View is Destroyed I am using AutoClearedValue class from this link and when view is destroyed, backing field becomes null and that is good but i have a thread(actually a kotlin coroutine) that after it is done, it accesses the value(which uses autoCleared) but if before it's Job is done i navigate to another fragment(view of this fragment is...

Why when using FragmentContainerView, the design tab is not refreshing? While im learning to navigate between fragment, i've got this warning. Replace the tag with FragmentContainerView. So i easily fixed the warning by replacing the tag and now the design tab is not showing the fragment that i have make. This is the screenshot of it: This is the screenshot of normal condition when I'm using fragment tab. <a href="" rel="nofollow...

Media Store record Not creating while saving image to Picture Folder in Android 10 So, I need to save image to the Picture folder. There will be some subfolders too. But every time I want to save an image it is giving this error: Failed to create new mediaStore record This is what I tried: @RequiresApi(Build.VERSION_CODES.Q) @Throws(IOException::class) fun saveMediaToStorage(context: Context, bitmap: Bitmap, format: CompressFormat, fName: String, folderName: String, extension: String) { //Generating a file name val filename = if...

Is Coroutine job auto cancelled upon exiting Activity? I have the below code of a slow loading image class MainActivity : AppCompatActivity() { private lateinit var job: Job override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val imageLoader = ImageLoader.Builder(this) .componentRegistry { add(SvgDecoder(this@MainActivity)) } .build() job = MainScope().launch { try { val request...

PHP null POST value I was training for Volley library and tried to send POST request to my API. The following code is my PHP code. When I try to send request to this with Retrofit library, it's successful. I can get {"isim":"ibrahim"} output. But when I try the same thing with Volley or Postman, I got the 'null value' output.

How to open android app in PC browser with http protocol? First, I don't know how to call this in android development. I am trying to search on the internet but found nothing. Scenario: I develop an android app that could do database functions e.g. create, update, delete some data. Say simple list of animal names. I could do everything database functions but only on android device (I mean my app). My question: Could I do all the database functions on PC browser that connected to my android app with a url link? For example -- <a...

Passing null value to Kotlin method with non nullable default arguments I am new to Kotlin and I found one of the features which Kotlin differs from Java is method default arguments. https://kotlinlang.org/docs/functions.html#default-arguments I am creating a simple Kotlin application which passes null values to a method with 2 non nullable default arguments, which results in a compilation error - Type mismatch: inferred type is String? but String was expected)....

okhttp:4.4.0: Can't set timeout: Val cannot be reassigned Kotlin project in build.gradle implementation 'com.squareup.okhttp3okhttp4.4.0' By default timeout is 10 sec. I want to change to 30 sec. I try this: import okhttp3.MediaType.Companion.toMediaType import okhttp3.OkHttpClient import okhttp3.Request import okhttp3.RequestBody.Companion.toRequestBody import okhttp3.Response val requestTocan = Request.Builder() .url(loginTocanRequestURL) .get() .build() val httpClient =...

How to dynamically combine interfaces in Kotlin? I am not sure how to word the question in a more correct fashion or how to come up with an example that is less contrived. Let's say that I have an interface that describes some fields (Data in my example). I then want to apply some transformations to it (sum and multiply the fields in my example). Ideally, this should be like a data pipeline configurable at runtime by the user of the application (via a config file, for example). I also define interfaces for properties that get added to my...

How to add setOnClickListener on FrameLayout.LayoutParams? I'm new to Kotlin. And I want to set click event on a FrameLayout.LayoutParams programmatically. Code bellow is working. val frameLayout : FrameLayout = FrameLayout(this) as FrameLayout frameLayout.setOnClickListener {shownLayoutClick(frameLayout)} But I can't add click listener on FrameLayout.LayoutParams. How to add clicklistener to this one?

Kotlin - Type Erasure and Casting I'm trying to understand how a ClassCastException can be thrown from code, where as far as I understand, the type being cast to has been erased. Example class Foo(val key: String, val value: T) { override fun toString() = "$key: $value" } fun findByKey(items: Iterable, key: String): List { return items.filter { it.key == key } as List } fun main() { val items = listOf( Foo("a", "abc"), Foo("a", 12345), Foo("a", false) ) val filtered =...

How to send/view a file from flash on android? I want to view/send a file from OTG USB but it shows me a dialog message "can't open file" when I want to view it or "No apps can perform this action" when I want to send it even though I have a pdf reader. val uri = FileProvider.getUriForFile( this, this.applicationContext.packageName.toString() + ".provider", File("/storage/emulated/0/Example.pdf") ) val intent = Intent(Intent.ACTION_SEND) intent.setDataAndType(uri,...

store multi images in Mysql database in one filed i am working on something like playstore , as you can see in playstore for example for game type. in game type we have for example 20 game; suppose that when you click on for example call of duty it has one image for profile and 4 or 5 image that shows the game's environment the problem is that --> if i want to do that, how i should store atleast 4 image in one filed for example i have table like this: id(int),game_type(varchar),title(varchar),imageUrl(??) for example this is my table. so...

`suspendCoroutine` throws `This job has not completed yet` exception? I'm trying to test my encapsulated translator class which uses Google ML Kit Translate under the hood. I got an error that throws java.lang.IllegalStateException: This job has not completed yet. I don't quite understand why this exception occurs. Has anyone ideas? import com.google.common.truth.Truth.assertThat import kotlinx.coroutines.CoroutineDispatcher import kotlinx.coroutines.Dispatchers import kotlinx.coroutines.ExperimentalCoroutinesApi import kotlinx.coroutines.runBlocking import...

Cancel coroutine with liveData in Android I have app which works with Retrofit2, liveData and Coroutines for get information by my API. I need to cancel job, if we start new one, I try to use Job.cancel(), but something wrong. It's my ViewModel: class MembersViewModel(private val memberRepository: MemberRepository) : ViewModel() { private var job = Job() fun getMembers(category: String, year: String) = liveData(job + Dispatchers.IO) { emit(Resource.loading(null)) try { val data =...

Testing involving MutableSharedFlow - java.lang.IllegalStateException: This job has not completed yet Apologies for what is probably a very amateur question. I'm getting to grips with flows and having issues with testing where MutableSharedFlow is concerned. The following is the simplest example I can construct that recreates the problem: @ExperimentalCoroutinesApi @ExperimentalTime class MyExampleTest { val testDispatcher: TestCoroutineDispatcher = TestCoroutineDispatcher() @Test fun test() = testDispatcher.runBlockingTest { val sharedFlow = MutableSharedFlow()...

Kotlin serializable Exception I'm making an API call and got response 200, but when I try to parse it, I got an exception I have tried for hours I don't understand why.. offset 0 is "{" so where is the problem? I'm making an API call and got response 200, but when I try to parse it, I got an exception I have tried for hours I don't understand why.. offset 0 is "{" so where is the problem? JSON Model class import kotlinx.serialization.SerialName...

WebView playing live stream randomly not in fullscreen mode I am writing an app with just a fullscreen webview object, no menus, buttons, texts or any other object, controlled through remote control. It just reproduces fullscreen live video streams, in landscape mode only, and it works, usually. For some video sources, the video is not immediately fullscreen, instead occupies a rectangle in the center of the screen, then switches to fullscreen after few seconds (the occurring time is random) override fun onCreate(savedInstanceState: Bundle?)...

Android Listview deleted checked box Kotlin Using Listview, I deleted item if check box is checked. Although it has been implemented through googling, it does not work when you press the checkbox and then press the delete button. I wrote it like the source below, but nothing reacts. What should I fix? lv.choiceMode = ListView.CHOICE_MODE_MULTIPLE val del = binding.delBtn val lv = binding.lvMainMusic del.setOnClickListener { val count: Int = mainAdapter.count if (count > 0) { val checked:...

How to execute this code in a .JAR file however in IDE works When I execute this code in my Ide IntelliJ, it works perfect. But when I do it in my file .JAR finally, it does not work. @Throws(IOException::class) fun extractZipMachineFromJar(file: String?, destination: String?) { var `in`: ZipInputStream? = null var out: OutputStream? = null try { // Open the ZIP file

in

= ZipInputStream((URL(file)).openStream()) // Get the first entry var entry: ZipEntry? = null while (

in

.nextEntry.also { entry = it } !=...

FirebaseAuthException thrown although it is caught I'm trying to build a firebase login function, but the code crashes even though the exception thrown is caught. When I output the exception as a log the code works, but when I pass it on as an exception it crashes. I would like to pass the exception on to the MainActivity in order to process it correctly there, i.e. to have the exception.message output there as toast. The login process works with the use of valid login data without problems only if firebase reports an exception it crashes....

Kotlin Start worker when onTaskRemoved I have a service which gets called when the app is getting removed/closed. The service will start a OneTimeWorkRequest. Somehow the Workmanager will never start when onTaskRemoved is called. Is there a way to make sure that when the app is killed the Workmanager gets to work? This is my code: AndroidManifest.xml OnClearFromRecentService.kt class OnClearFromRecentService : Service() { override fun onBind(p0: Intent?): IBinder? { TODO("Not yet implemented") } override...