Doesn't check username when creating user user was saving if else until I added private fun CreateAccount() { val username = txtUsername.text.toString() try { if (username.isEmpty()) { Toast.makeText(this, "Username is null", Toast.LENGTH_LONG).show() } else{ val response = RestServiceObject.buildService(UserService::class.java) response.addUsers(username = username).enqueue( object : Callback {...

Kotlin sortedMap compared by the Pair value not the key I found this statement sortedMapOf(compareBy { it.length }, Pair("abc", 1), Pair("c", 3), Pair("bd", 4), Pair("bc", 2)) So it sorts first by the length of the key. However what I need is a sort by the value of the map's pairs. Therefore I tried this: mapOf("eat" to 11.0, "sleep" to 50.0).toSortedMap(Comparator { o1, o2 -> o1.second.compareTo(o2.second) }) For some reason the part Comparator { o1, o2 -> o1.second.compareTo(o2.second) } gives me an error. My IDE (IntelliJ) tells me this:...

How to disable wifi connect dialog When connecting to Wifi programmatically I see a system dialog in Android 10 or higher. This dialog requires the user to accept. Is there a permission to hide this dialog? In older versions of Android it doesn't show. This app is for myself, but I don't want to modify the OS. I can add any permission because I won't put in the playstore, but I wouldn't want to mess with my phone's OS. Any ideas?

Android fragment creation without constructor params I have a viewpager2 adapter class SectionPager2(fragment: Fragment): FragmentStateAdapter(fragment) { private val fragmentList = mutableListOf() override fun getItemCount() = fragmentList.size override fun createFragment(position: Int) = fragmentList[position] fun addFragment(position: Int, fragment: Fragment) { fragmentList.add(position, fragment) } } I use it along with a Tablayout like this val sectionPagerAdapter = SectionPager2(this) for (item in...

RecyclerView sometimes doesn't load I get the data for the list from the Internet. Everything works fine, but when Fragment is restored after stopping (minimized the application and used others), the list is not loaded (not always). It doesn't happen all the time, so it's not even possible to track in which lifecycle period it happens. The adapter is initialized here: override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) setupView(view) } override fun...

Android Authenticator API runs in infinite loop I've following Authenticator API Implementation: class TokenAuthenticator( ... ) : Authenticator { override fun authenticate(route: Route?, response: Response): Request? = synchronized(this) { if (responseCount(response) >= 2) return null response.createSignedRequest() } private fun Response.createSignedRequest(): Request? = try { val response = api().refreshToken().execute() if (response.isSuccessful) { ......

Dynamic filters for products in EShop application problem I have dynamic filters implemented into my E-Shop application. Each product can have multiple characteristics and each characteristics can be applied to multiple products. I have table for products, table for characteristics and product_characteristics table (Many-To-Many). Here is a picture of the tables Example of characteristic: Id Name Value 1 Brand Casio 2 Brand Hugo Boss 3...

How to create a RecognitionListener in Android Kotlin I'm new to Kotlin, and essentially I'm trying to create an app that counts how many times someone says a keyword. I'm using the SpeechRecognizer API, and I'm having trouble creating a RecognitionListener. Below is the problematic code: private val speech: SpeechRecognizer by lazy { SpeechRecognizer.createSpeechRecognizer(this) } if (SpeechRecognizer.isRecognitionAvailable(this)) { Toast.makeText(this, "Voice recognition available.", Toast.LENGTH_SHORT).show() val...

Sort array of strings using kotlin without using built in function Given an array of strings Arr[], the task is to sort them in lexicographic order. Example #1 Input: Arr[] = {“sort”, “this”, “list”} Output: [list, sort, this] Example #2 Input: Arr[] = {“sun”, “earth”, “mars”, “mercury”} Output: [earth, mars, mercury, sun] How to solve it without using built in function sort() ?As I get this answer on geeksforgeeks but I didn't understand the solution here on geeksforgeeks.org/sort-given-words-as-array-of-strings

How can I get the size of a text when I use Text() in Compose? I create a new project by Empty Compose Activity wizard in Android Studio. The Code A is generated code by Android Studio. Text(text = "Hello $name!") displays a text with default font style, I hope to get the size and unit of the text, such as 16sp, where can I find these informations? Code A class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContent { MyApplicationTheme {...

How to get top Fragment in backstack from DialogFragment I'm using navigation to navigate between fragments. And I have a DialogFragment, it can called from from many fragment like this: val dialog = FragmentDialog dialog.show(childFragmentManager, "home_fragment") And I want to know dialogfragment called by which fragment I tried with FragmentManager.backStackEntryCount but it's seem doesn't work Can I have a advice for this problem ???

Setting Alarm sound programmatically doesn't work but Ringtone and Notification does? RingtoneManager I want the user the be able to choose between setting a sound as Alarm, Notification and Ringtone. Debugging device is Samsung Galaxy S10+. Not sure why it's not working and also not sure how it is suppose to work if every Alarm can have a different sound, what should change ? Setting it as Ringtone and Notification works totally fine, just when I choose RingtoneManager.TYPE_ALARM nothing changes private fun changeSystemAudio(context: Context, type: Int, file: File) { val values =...

Is there an easier way to declare a lambda as a variable in java similar to that of Kotlin? here's how lambdas are in kotlin - val myLambda: (Int, Int) -> Unit = { a, b -> Log.d(TAG, "sum value = ${a + b}") } myLambda(1, 2)//running the lambda In java, I found these two methods to do the same. Here, I can't have the runnable take a parameter. // runnable method Runnable runnable = () -> { System.out.println("x"); }; runnable.run(); The issue with this method is I would have to declare multiple interfaces for different types // interface method Finder finder = (s1, s2)...

Android Room use Type Converter insert success but can't query Room 2.4.2 I need store the List data to database , so I convert the numbers to a String,this is convert code , I add it to my database and i insert data success : class Converter { /** list -> [1][2] */ @TypeConverter fun numberToStr(numbers: List): String { val sb = StringBuffer() numbers.forEach { sb.append("[$it]") } return sb.toString() } /** [1][2] -> list */ @TypeConverter fun strToNumber(str: String): List {...

How to localize User Consent API prompt text on Android I'd like to localize or event better change the prompt text of User Consent API. Default behavior: So instead of Allow example to read the message below and enter the code I want it to be translated in other languages.

NoClassDefFoundError for singleton kotlin android? I create an arr of my library module and use it in another application. On one of the singleton class from my aar I get NoClassDefFoundError for its usage This is my singleton class object SharedPrefTask { fun doSomeWork() { ///// } } This is the class where I use the singleton class ConfigController(val mContext: Context) { private var prefTask: SharedPrefTask = SharedPrefTask fun fetchConfig() { val configs = prefTask.doSomeWork() } } Is there something which is wrong here? I...

Navigation Component Pop Fragment with navigation view I am using bottom navigation view with android navigation component, in some cases I open some other fragment instead of home (main) fragment at start. so in that case when I switch to other tabs and then click on home tab, now I want to open home tab but I get the opened fragment Example : normal flow: I have fragments structure A B C D conditional flow : X B C D , X is my conditional fragment I open at start sometimes

How to clear setPivotX()/setPivotY() below Api 28? in Api 28 View provides resetPivot() to "Clears any pivot previously set by a call to setPivotX(float) or setPivotY(float)" but how to do this below Api 28

How can I reference theme colors in Kotlin Working in Kotlin on Android Studio 2021.2.1, for a themes.xml file like this: #888888 @color/purple_700 #FFFFFF ... In class code, I can reference the colorPrimary color and use it to do something like draw a filled rectangle like this: fun drawRect(iv:ImageView) { val bitmap = Bitmap.createBitmap(iv.width, iv.height, Bitmap.Config.ARGB_8888) val canvas = Canvas(bitmap) val paint = Paint() paint.style = Paint.Style.FILL...

LiveData observer not triggered I want to navigate to an other Fragment when the user selcts a value (player id) in the AlertDialog. I use this change to the id to trigger the navigation. Unfortunately the observer of this property doesn't get triggerd. Please see the following code: SelectCharacterDialogFragment.kt @AndroidEntryPoint class SelectCharacterDialogFragment : DialogFragment() { val viewModel: WelcomeViewModel by viewModels() override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {...

How to use variables for enter/exit transitions in AnimatedNavHost Kotlin Compose I'm building my UI using AnimatedNavHost, and it's getting a little big. I was trying to assign variables to the values of enterTransition, exitTransition, etc. Here's my code: AnimatedNavHost( modifier = Modifier, navController = navController, startDestination = "menu" ) { composable("settings", enterTransition = { when (initialState.destination.route) { "menu" ->...

How to change popup menu color in matetial3 How can i change popup menu background color in material3. I have tried a lot but found no solutions. I had tried itemBacgroundColor also but it’s still in different color. I want it to white.

Conditional parameter in composable I have a composable with defult parameter -> height = 300. Here I have condition which gives height 360 or 300 (default). Is there any way that I don't need to write the default(300) value. I was thinking about something like -> MaximizedContainer(onClick = { onClick() }, if (infoOpened) {height = 360}) {}, but this is not working. So currently it looks like this -> MaximizedContainer(onClick = { onClick() }, height = if (infoOpened) 360 else 300) {}, but I don't want to every time specify...

Android Kotlin Proguard Obfuscation of Kotlin Default Impl I use Android + Kotlin + Proguard Code inferface Authentication { val authenticated: Boolean val lastAuthentication: Instant fun authenticate(): Flow suspend fun revokeAccess() } And an implementation of that interface internal sealed class AuthenticationInternal( private val trustProvider: TrustProvider) : Authentication { override val authenticated: Boolean get() = trustProvider.authenticatedBefore() override val lastAuthentication: Instant get() =...

How to open different acitivies when click any recyclerView Items in Kotlin? I got crazy ı am not able find solution. Please help me. 2 days ı am looking for solution. I clearly watn that if I click any recylerView Item starting a new activity. Each item has to own its activity. Thanks in advance

Navigate to navigate when the corresponding button is clicked in Android JavascriptInterface I want to call navigate on click of Javascript button onClick function onClickButton using JavascriptInterface in Android Kotlin WebView. Kotlin code is structured like this. inner class JavaScriptInterface { @JavascriptInterface fun register(data: String){ navigate( tDirections.actionxnut08EventToEventJoinForm() ) } } The Javascript code is structured like this. const onClickButton = () => { } return ( onClickButton()}> ) How can I call...

Right way to access activity context from ViewModel This is not a question to solve an error, I just want to make sure I am going for the right approach and not introducing any memory leaks and all. I'm using DataBinding with ViewModel the view model holds the data of the specific view and also do all type of view listeners (eg: onClick) inside the view model like this // a view model to control the app drawer internal class DrawerModel : ViewModel() { // view automatically updates when I change the values of the following...

Kotlin - How to wait for multiple API calls to finish and update UI? I'm new to kotlin coroutines. I've been trying to run multiple API calls in parallel and then when all the calls are done update my UI and dismiss the loader, but with no success. This is my code private fun getScoreForType() { val job = CoroutineScope(Dispatchers.IO).launch { types.forEach { type -> getScore(type) } } runBlocking { job.join() // do some ui work dismissLoader() } } private fun getScore(type: String) {...

How to show GPS permission dialog like google I want to show GPS enable/disable dialog same like google. I have tried with GoogleApiClient but it is deprecated now so what is the alternative for this? I have attached screenshot below. Another solution is to show custom dialog and when user press on OK button I can redirect user to GPS permission setting screen but I want to achieve that like google so what is the better solution for that? Thank you in advance :)

RecyclerView with courutines, using Fragment dosen't populate data Kotlin I am trying to work wih courutines and recycler view. I've done everything necessary to send requests to the API, but I still can't get the list that should be inside the recycler view. I am using fragment to create list and bottom nav. When I go to the fragment where my list should be, then I get the error: RecyclerView: No layout manager attached; skipping layoutand nothing more. I googled about this error and it says I should define the layout manager in xml, but it alreadt has layuout...