Not able to get location every time in android sdk I had an application where employee can punch his attendance through android app. But location result is not 100% perfect. 90% app fetches current location and 10% it shows location not found and its random after 1 min same employee punch in app then he is getting proper result I am having trouble with getting user's current location with address (geocoder) in Android app. After lots of searches over many links I came up with the following link and found <a...

Find string in array and return its index Is there a way to search through a string array and return its index if it is found. Of course I can just iterate through the array and perform the search myself. But I am wondering if there is a more efficient way of doing it. Kotlin has the "contains" method but that returns a boolean. I want the index position instead.

Can't fetch the index number of repeated character in a string [Kotlin 1.3.31] I am trying to print number of times each char in a string repeats on the right position but because of repeating char I cant fetch the index of the second occurrence of that char I tried the indexOf with position specified as the last index ,and now the error is occurring for consecutive repeats only var Last=0 for (Left in str){ var num:Int=-1 var index=str.indexOf(Left,Last) for (i in index..len) if (Left.equals(str[i],true)) {...

Save Image &amp; Videos in Gallery with auto Refresh of gallery in Android Kotlin/Java I am trying to save images and Videos in gallery. It is saving but gallery is not refreshing auto. How to save File(IMAGE/VIDEO) that save in gallery with auto refresh of gallery just like whatsapp images/video saves. Here is my Save function: fun saveFile(currentFile: File, context: Context):Boolean { val destPath = Environment.getExternalStorageDirectory().absolutePath + DIRECTORY_TO_SAVE_MEDIA_NOW val destFile = File(destPath) checkFolder(destFile) try {...

Are Kotlin Lists... "instantiable" interfaces? So I have a class that models a string of bits. This would be great to do with a plain old list of ints but to practice a bit I wanted to derive a Kotlin collection. I want to derive a basic immutable collection. In Java List is an interface. In Kotlin this also seems to be the case. The documentation says it is, so logic says that it can't be instantiated. However... if that is the case then what does listOf() return? Runnig a simple listOf() in the Kotlin REPL gives a result that...

How to do deferred deep-linking to an external app on android? So I want to do deferred deep-link from my app to an external app (app I am not in control of) on android. I can now construct 2 intents that acts as I anticipate: first opens the play store and installs the app, the other opens the app at a specific location. How am I able to do deferred deep-linking so that the app will install when not installed and when installed open at this specific location in the app in one go? It seems like most answers to this problem is regarding receiving...

Contains method returns always false? i am fetching contacts and adding to a list.list contains duplicate contacts too,i have to remove duplicate contacts at the time of adding to list. i am using contains method at the time of adding to list but contains method always returns false even there is same element in list. if (!phoneContactVOList.contains(contactVO)) { contactVO.ContactName=name contactVO.ContactNumber = phoneNumber...

Getting object using position when spinner item is selected (onItemSelectedListener) I have an activity with two spinners. The first spinner (projectSpinner) populates the second(contentSpinner) using the field project_id of a data List. In a non-component architecture, I'd simply store the List inside my activity and later on inside my onItemSelectedListener do something like Project[position].project_id to help me populate the second spinner(contentSpinner) Now that am trying to adopt an MVVM architecture I fail to figure out how to get this project_id. Here is what i...

Returned image from Camera error on fileDescriptors I want to open Camera and save image as bitmap after photo is taken. I've found solution, but part of it doesn't work properly. Do anyone know what can cause this exception? getImageFromResult() is called inside onActivityResult. Result code is result code returned from Camera intent and ImageReturnedIntent is data(image). Exception: fileDescriptorErr: open failed: ENOENT (No such file or directory) (decodeBitmap) Code: fun getImageFromResult( context: Context, resultCode:...

Kotlin coroutines: why can't I see logs until the end? I'm new with kotlin coroutines and have some doubts. So I'm trying to download a list of fonts using a kotlin coroutine, and I added some logs to see when a font is downloaded, or a message when it already existed. I was expecting to see one log each time a font is accessed, however I see only the progressBar, and when it gets hidden, I see all the logs at once. Am I doing something wrong? private fun init() { val job = Job() val bgScope = CoroutineScope(Dispatchers.IO + job)...

How to update live data of the viewModel, when click is performed on recyclerview item I am new to the Kotlin and I am trying to create an application with MVVM. so what I am trying to do is to make a web call using retrofit in the repository and returning data to the view model and then observing the data from the fragment and as soon as data changes I am notifying it to the recycler view adapter everything is working fine. Now, the problem is I want to update that live data of ViewHolder from the recyclerview. when I click on the CheckBox in recyclerView the data should be...

java.lang.NoSuchMethodException for onCreate I see crashes in the Google Play crash log that is really stumping me. java.lang.RuntimeException: at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3086) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:3229) at android.app.servertransaction.LaunchActivityItem.execute (LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks (TransactionExecutor.java:108) at...

RXJava2 block stream until condition is satisfied I have a queue of files to be uploaded which are emitted by an Observable and I'd like to only upload files when I have a WIFI connection. I've got a solution which will only start emitting the queue when a WIFI connection is established, but ideally I'd like to check before emitting each queue item (and then blocking at this point until a WIFI connection is established). In this way the queue will block items being uploaded if the Wifi is disconnected during the queue upload and resume when...

Illegal reflective access operation occurring in Kotlin while trying to run a hello world program I am trying to run Kotlin using IntelliJ and I can't run anything without getting an illegal reflective access operation. not even a hello world program. I've tried checking for updates to Kotlin The code I run is below. the error happens with and without the package. fun main() { println("Hello World!") } I get the error WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.intellij.openapi.util.JDOMUtil$2...

Declare a function using a generic parameter I have these two functions: fun displayTotalSelectedString(btn: ListItemButton, items: MutableList?, resId: Int) { btn.text = if ((items == null) || (items.size == 0)) getString(resId) else getString(resId) + " (" + items.size + ")" } fun displayTotalSelectedInt(btn: ListItemButton, items: MutableList?, resId: Int) { btn.text = if ((items == null) || (items.size == 0)) getString(resId) else getString(resId) + " (" + items.size + ")" } They are almost identical except the second...

Starter script for Gradle Kotlin application cannot find main class I'm trying to build a Kotlin application using Gradle 5.4.1. The code generated by gradle init can be run via ./gradlew run, and I assumed I should be able to execute the script generated in build/scripts. That script however cannot find the main class for some reason :( Is this a problem with Gradle, the application plugin, or my assumptions? $ mkdir example $ cd example $ gradle -v ------------------------------------------------------------ Gradle 5.4.1...

Project fails to compile when automatically generating an adapter for a class that can contain instances of itself It doesn't look like I can add a field with the same type as the parent class if I want to automatically generate an adapter with moshi Here is my code: @JsonClass(generateAdapter = true) class CommentModel: ListingItem() { var id: String? = null var body: String = "" var created: String? = null var score: Int = 0 .... // bunch of other fields // this is the cause of my compilation error var replies: List? = null } The project fails to compile and gives me...

How can I open a toolbar menu (not the main one) of an individual subview item in Espresso? In Android Espresso, I want to open a action bar menu of an individual item, so I can delete that item from a recyclerview. I know I can use the method "openActionBarOverflowOrOptionsMenu", but that only identifies the main Toolbar of the activity. Each item of my recyclerview has a Toolbar element, and I can't find a way to perform the open-menu action on a specific item. Each item in my recyclerview looks like this: <a href="" rel="nofollow...

I need to make to disappearance ImageView. How I can make it? It's the last one what I need to do I need to make to disappearance ImageView. How I can make it? It's the last one what I need to do. I have piece of paper. I need to move it in basket and it will disappearance. Main5Activity.kt The file I realized piece of paper move. How realize delete piece of papre or disappearance? package com.example.fairytale_quest import android.os.Bundle import android.support.v7.app.AppCompatActivity import android.view.MotionEvent import android.view.View import...

kotlin, where the return from inside the let go inline fun T.run(block: T.() -> R): R { return block() } and have a function like: fun getType() : String? { val type = mContent.let { if (!TextUtils.isEmpty(it) && it == "TYPE_1") { return "TYPE_A" . //where it returns to, as the result of the let{}, or as return value to exit the fun getType()? } else { return it } } if (type == "TYPE_A") { return getType_A() } return type } where...

How to get data out of Json with kotlin I want to get the value of "url" out of the Json below but I dont know how. I just need an easy way of getting that one value, i dont need to get whole Json as a kotlin class. In python I would just do something like: Url_json = Json[response][hits][0][result][url] But how do i do the same on kotlin? { "meta": { "status": 200 }, "response": { "hits": [ { "highlights": [], "index": "song", "type": "song", "result": { "url":...

Retrofit illegalStateException Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $ I passed a request on postman and got a successful response. Now when I try to do the same by code, using Retrofit 2, I get the error: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $. Originally I got the following error: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $, but after adding .setLenient() to Gson builder, it was solved. I know that this usually happens if...

How to prevent menu from disappearing on item click in Android? I have a menu in which all items have a checkbox. So it is like a multichoice menu. I don't want the menu to close when an item is clicked. I only want to close the menu on back press. But I can't figure out how to do it? This is the code: override fun onOptionsItemSelected(item: MenuItem): Boolean { when(item.itemId) { R.id.my_item -> { // toggle } } // something to do here? // changing return value to true or false doesn't help return...

How to Auto Generate Kotlin Class Name to match new Kotlin File in Android Studio When creating a new Java file in Android Studio, the file automatically contains the boilerplate code required. Example: package com.testproject.test public class TestClass { } When I make a new Kotlin file in Android studio, it only contains the following auto generated code but it doesn't contain the class: package com.testproject.test So I have to type the class every time. I understand that the classes in Kotlin are not required to be named the same as their...

Akka Stream emitting random amount of items I have a file that consists of 66564 lines that I am splitting into each lines. I will need to group those lines together based on a line that indicates the end of a record. I am intending to use splitAfter to do this, but for now I am already stuck with this: val numLines = AtomicLong(0) FileIO.fromPath(Paths.get(file)) .via(Framing.delimiter(ByteString.fromString("\n"), Int.MAX_VALUE, true)) .map { it.decodeString(StandardCharsets.UTF_8) } .map...

What instructions are executed before main() function in Kotlin? In Kotlin, it is said that main function is the entry point (i.e "...where the first instructions of a program are executed..." cf wiki). However, the following code prints 2 before 1 : fun main(args: Array) { println("1") } var print_me = println("2") Why? Thanks

Cannot resolve external dependency Hello im new to Android I got stuck here and this error appears: "Cannot resolve external dependency org.jetbrains.kotlin:kotlin-gradle- plugin:1.3.31 because no repositories are defined. Required by: project :app" build.gradle module apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' android { compileSdkVersion 29 buildToolsVersion "29.0.0" defaultConfig { applicationId "com.ahmadnaser.startapp" minSdkVersion 26...

Converting RecyclerView to ViewPager / PagerAdapter Background - New to Android, but pretty nifty with moving layouts around, understanding Java, Kotlin and XML. However this task seems to be way above my head. Problem - I'm looking to convert the following Java file (RecyclerView) into a Kotlin file (ViewPager) - since I already have a ViewPager hooked-up with the same scrolling behaviour as desired. I get the impression it's a 10min job for a seasoned developer. If that's the case I wonder if I could call upon some assistance from the...

How to correctly use Mockito's verify on a spring @Service test I have this service (all in kotlin): @Service class MyService { fun getSomeString(): String = "test" } And this integration test class: @RunWith(SpringRunner::class) @SpringBootTest @EmbeddedKafka // used on some kafka tests class BasicTests { and method: @Test fun `test method count`() { // here I have a kafka producer sending a message to a topic that ends up // calling myService.getSomeString via @KafkaListener from other services verify(someObjectRelatedToMyService,...

Swagger ui shows duplicate model variables Swagger-ui shows duplicate model variables when in edit and none edit mode. This happens to every single model shown on the ui have duplicate model variable. Not sure if this is due to using kotlin but its really frustrating and confusing. The duplicate variable seems to have $timefundcharity after each variable. Any help is welcome { "charityId$charity": 0, "createdAt$charity": "2019-06-19T201633.735Z", "id": 0, "id$charity": 0, "userId": 0, "userId$charity": 0, "charityId":...