How to know what version of assertEquals to use I'm working on an app in Kotlin on Android Studio. When working on a test, and I type "assertEquals" the method name is shown in red. If I type alt+enter, I get a choice of 3 versions. assertEquals(String, Object, Object) (of junit.framework.assert) assertEquals(String, Object, Object) (of junit.framework.testcase) assertEquals(String, Object, Object) (of org.junit.assert) How does one know which to choose?

How to send user to a different activity (intent is not working) *In this code, I would like to send the user to a different activity when they hit the see more button in the dropdown menu but when I try and run the line startActivity(Intent(this,home::class.java )) I get an error that says none of the following function can be called with the argument supplied * var name:TextView var mbNum:TextView var mMenus:ImageView init{ name = v.findViewById(R.id.mTitle) mbNum =...

Kotlin Change ViewText with an ID provided by a String Goal: To get a ViewText resource and edit it from an activity, using a mutable string (because then the string can be changed to alter other ViewTexts in the same function). Context: I'm making a grid using TableRows and TextViews that can be altered to form a sort of map that can be generated from an array. Issue: The binding command does not recognise strings. See my comment "PROBLEM HERE". Tried: getResources.getIdentifier but I've been told that reduces performance drastically. An excerpt...

Android Studio Getting Image From Firebase storage Hi everyone im trying to get images from Firebase Storage, each one is named after the userID, the problem and putting the images in itemListView the problem is sometimes it shows the right image for a second then it changes to the same as the other user, but it grabs all the other information right but all the arraylists i use to get the image, name and role are all correct in the same order <a...

Questions for making an app to take high resolution photos I'm trying to create a camera app using an android smartphone. The smartphone camera is a 64 megapixel camera. When you get the resolution using cameraX You can only get a camera with a maximum of 12 million pixels. I tried it on Samsung Galaxy S21. When I contacted Samsung's developer support, it seems that I can only get up to 12 million pixels. So, the question is, is there anyone using a smartphone terminal that can shoot images with a resolution of 50 million pixels or more using Camera...

Change hamburger menu from drawable to imageview I am building an app using a side menu and using supportActionBar to access to it supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_hamburger) I would like to review the R.drawable.ic_hamburger by a layout with an ImageView. The goal is to display a circle shape profile picture instead of a standard icon. I cannot find a good solution. Any idea? Thanks

Why do I get only a part of string when I use getString in Kotlin? I saved a string in resources file, I run Code A and get Result A, I hope to get the Result B. What's wrong with my code? Result A Recommend the app to a friend Code A val context = LocalContext.current val temp=context.getString(R.string.myRecommendContent) Recommend (#) the app to a friend Result B Recommend (#) the app to a friend

Get result from activity that opened with intent filter I have an intent filter like below to open specific activity when custom scheme and host called: because I don't open this PurchaseActivity via code (it's just an intent-filter that opened automatically when test://payment called) I can't call startActivityForResult, registerForActivityResult, ... inside PurchaseActivity I want to pass data to parent activity before calling finish()

Break the chain of work manager requests list for some specific condition or in case of failure I have three work requests as below val imageWorker = OneTimeWorkRequestBuilder() .setConstraints(constraints) .addTag("imageWork") .build() val gpSurveyWorker = OneTimeWorkRequestBuilder() .setConstraints(constraints) .addTag("gpSurveyWork") .build() val gpSurveyListWorker = OneTimeWorkRequestBuilder() .setConstraints(constraints) .addTag("gpSurveyList") .build() and I enqueue them in work Manager as...

!!Please Help me!! parse No Key json list with moshi in Android What I am trying to do is to get Json response from GitHub API call of user's repository list. response example from Github is like below. [ { "id": 78688034, "node_id": "MDEwOlJlcG9zaXRvcnk3ODY4ODAzNA==", "name": "py3status", "full_name": "randomguy/py3status", "private": false, "owner": { "login": "randomguy", "id": 798223, "node_id": "MDQ6VXNlcjc5ODIyMw==", "avatar_url": "https://avatars.githubusercontent.com/u/798223?v=4",...

How can I pass the checked radio button value into text View in kotlin android studio? I made a dialogue box and I put radio group in it and i add three radio button 1)male 2)female 3)others if user select male so the selected radio button male should be shown in text View

Im trying implement cast on my app but cast icon not show I'm trying to add an android cast for my android app but my cast icon does not show on my app. Here is my menu Code And this is my Cast options provider. I'm not registered with the google cast developer console so IM using CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID here class CastOptionsProvider : OptionsProvider { override fun getCastOptions(p0: Context?): CastOptions { return CastOptions.Builder()...

Kotlin Recyclerview change item color onClick i have a Recyclerview adapter in Kotlin and when i click it change the color to Red but if i click another item, the previous item still have the Red color. How to make the logic when the item click it will change Red and when click another item it will back to default color and new item become Red. this is the adapter class CategoryAdapter(private val onClick: OnClickListener): RecyclerView.Adapter() { private val diffCallBack = object: DiffUtil.ItemCallback(){ override fun...

Validating data from a database I am trying to create a registration screen. When the registration button is pressed, I want the program to check if the provided username already exists in the database. Is it does, it will not proceed with the registration. Problem is, I cannot, find a way to access the data. Here's the related code '''@Database(entities = arrayOf(User::class), version = 1) abstract class UsersDatabase : RoomDatabase() { abstract fun usersDao(): UsersDao companion object { @Volatile private var...

How to parse XML and avoid parsing errors of namespace by setting a default one? Background I'm trying to parse some manifest XML files of Android APK files The problem I've noticed that in some cases, the XML files aren't valid, meaning that many times there is no namespace being defined, or that for some XML attributes, the namespace isn't used at all. For example, this is a tiny part of Chrome APK manifest file (it's much longer): You can see that there is no namespace being defined here, and the attributes don't use one either. In some cases, the...

How to skip top key of json? There is JSON with root key playlist that fetch from Retrofit Interface. Gson library can't parse it to data class. Is there way to do "step into" playlist key before create model? { playlist: { name: "", description: "" } } data class Playlist(val name: String, val description: String)

Coverting Float to String with comma without Rounding I'm using this for adding commas into number. val commaNumber = NumberFormat.getNumberInstance(Locale.US).format(floatValue) floatValue is 8.1E-7 , but commaNumber shows just 0. How to covert Float to String with comma without Rounding?

Time taken to remove Firebase Realtime Database Listener My question is simple "how much time does it take to remove a listener?" I am asking this because when I assign a ValueEventListener to a specific place in a real-time database and remove it after the work is done. Now, if still the changes are made to the same database location where the listener was working before being removed, I still get the values and that should not happen. So, removing the ValueEventListener removes the listener instantaneously or after a while. If not then I might be...

How to pass traceId when creating new coroutine in sleuth? How to correctly pass the traceId when creating a new coroutine context? Currently the traceId and spanId is zero when launching a new coroutine. suspend fun test(event: TestEvent) { CoroutineScope(Dispatchers.IO).launch { (if anything logged here, it should have the same trace id) } }

Insert data and get back id in mybatis I should save the record in the database and get the record id in the response. After a long search and research I came up with the following option. data class User( val id: UUID? = null, val username: String, ... ) UserRepo: @Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id") @Insert(""" INSERT INTO "user" ( username, ... ) VALUES ( #{username}, ... ) """) fun save(user:...

Caused by: org.gradle.plugin.internal.InvalidPluginIdException: plugin id 'androidx.navigation:navigation-safe-args-gradle-plugin' is invalid? I am developing new android app where I am using android navigation component but when I run the project I am getting following Caused by: org.gradle.plugin.internal.InvalidPluginIdException: plugin id 'androidx.navigation:navigation-safe-args-gradle-plugin' is invalid below my build.gradle plugins { id 'com.android.application' version '7.1.3' apply false id 'com.android.library' version '7.1.3' apply false id 'org.jetbrains.kotlin.android' version '1.6.10' apply false id...

When to update local db(coredata) from server data for particular user? I am working on mobile application in which we'll store data to local db. If a user changed his/her name or profile image from web. Then how and when, i'll update my record on local db for particular user? Either will i have to check all record one by one or any other solution. Please suggest. What should be the steps to update db?

Kotlin inline function call vs function call with default type argument Consider the following code: fun foo(type: Class = Any::class.java) { } inline fun foo() { } fun main() { foo() // ERROR! } This code causes the following error: Type inference failed: Not enough information to infer parameter T in inline fun foo(): Unit Please specify it explicitly. Why doesn't the compiler just default to the non-inlined function, with a default argument?

kotlin spring @WebMvcTest is slow I'm using @WebMVcTest for the integration test in kotlin, spring. The speed of the test varies a lot for each method, but I don't know the exact cause. Each test method code is as follows. @Test fun `test1`() { // given val folderList = mutableListOf( Folder.FolderListResponse(1L, "emoji1", "child1"), Folder.FolderListResponse(2L, "emoji2", "child2") ) every { folderService.findFolderChildList(any()) } returns folderList...

Composable does not update when mutablestateflow in viewmodel I have Viewmodel where I keep reference to post. When i want to translate post i run function to update state flow and post and if I put logs there I see that value is changed but my composable did not get any new value. Here is part of code from viewmodel that doing this magic private var originalText = tile.text?.originalText private var text = tile.text?.text private var _postTileState = MutableStateFlow(tile) val tileState = _postTileState.asStateFlow() fun...

How to iterate over a Map in Kotlin So I am new to Kotlin and I am wondering what's the standard way of iterating a Map. I have tried different ways and all of them seem to work, but I don't know if there's one better than the rest or there are some differences that I am not aware of. var mutMap = mutableMapOf("one" to 1, "two" to 2, "tree" to 3, "four" to 4, "five" to 5) mutMap.forEach { entry -> println(entry) } mutMap.iterator().forEach { entry -> println(entry) } mutMap.entries.forEach { entry ->...

Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.6.0, expected version is 1.1.15 I have this problem when I want to use "react-native-webview": "^11.22.4" with "react-native-video": "^5.2.0". The problem appear when I wanted to use react native video D:\Document\Nodejs\Github\trender\mobile-interface\node_modules\react-native-webview\android\src\main\java\com\reactnativecommunity\webview\events\TopShouldStartLoadWithRequestEvent.kt: (28, 21): Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.6.0, expected...

PsiElement.firstChild vs PsiElement.children.first() I expected PsiElement.firstChild and PsiElement.children.first() to always return the same PsiElement, however, it turns out that (considering KtElements): for KtBlockExpression they are not the same: firstChild returns a left curly brace and children.first() returns the first expression of the body. for KtTypeReference they are the same thing. So the questions is: Why are they not equivalent in general? When are the equivalent and when are they different (I am interested mainly in classes...

In Kotlin how Immutable parameters affect space complexity if you have to copy the input every time to modify it? In Kotlin, function parameters are immutable, so you cannot modify the parameter in the code without making a copy first, does this affect space complexity, and does it prevent in-place modification, thus preventing it from having O(1) constant? What is the solution to this? fun replaceFirstElement(nums: IntArray, number: Int) { // not working nums[0] = number }