Compose Navigation - navigate to destination in nested graph. How to encapsulates destinations in the nested graph? According to the documentation on nested graph. Nested graph documentation The nested graph encapsulates its destinations. As with a root graph, a nested graph must have a destination identified as the start destination. Destinations outside of the nested graph, such as those on the root graph, access the nested graph only through its start destination. And in the documentation...

Use kotlin enum to avoid else statement in when expressions I would like to use the enum class to create exhaustive lists for when statements. I have created my enum class but in onCreateViewHolder() I am still getting error message "A 'return' expression required in a function with a block body ('{...}')". The error goes away when i add else statement. What's strange is that onBindViewHolder works fine even though it implements the same enum elements. How can I implement the enum here to avoid using else block in onCreateViewHolder()? enum class...

Koin SharedViewModel Property Not Updating Between Two Fragments When LifeCycleOwner Is Set to Activity I have two fragments A and B, that each share a sharedViewModel via Koin as such: val viewModel: IngredientViewModel by sharedViewModel() The binding for fragment A had its binding.lifecycleowner = requireActivity(), so it is bound to the lifecycle of the activity holding it. Fragment A also uses data binding, with a viewModel as a data bound variable as such: //layout for fragment A When I navigate to fragment B and change the value of someProperty in the...

Passing Data from Fragment's RecycleView to Activity I'm trying to pass data from one my HomeFragment's RecyclerView to my CategoryServiceActivity. I'm trying to pass my selected index of the RecyclerView so that way I can set the correct category name as the title on my supportActionBar instead of having "Category" as my title. Do I need to pass the selected name when I set the setOnClickListener on my PopularCategoriesAdapter, or should I be passing it into my CategoryServiceActivity? Thank you. My "Category" Title Issue <a...

Jetpack Compose - Adding KeyboardOptions Causes an Error to TextField The Code Text field works TextField( modifier = Modifier.layoutId(RegisterConstrainsIds.TF_USERNAME), value = userNameTextState, label = { Text(text = "username") }, singleLine = true, onValueChange = { userNameTextState = it } ) Text field doesn't work TextField( modifier = Modifier.layoutId(RegisterConstrainsIds.TF_USERNAME), value =...

Is there any gradle dependencies repository? I use Gradle as my dependencies manager in my Spring Boot project (with Kotlin). I want to add new dependencies to my (already generated) project. Is there any package manager repository such as https://mvnrepository.com/ or https://pub.dev (in Dart) to search for any Spring Boot gradle dependency? I noticed that Spring has Spring Initializr at <a...

Retrieving Graph Data using JSON and API data for Android App I am trying to create an Android mobile app primarily in Kotlin to track Covid-19 data. I am using retrofit to retrieve the API data. However when running the application to test my data come up blank. For some reason the API data is not being retrieved. The site I'm using is CovidActNow.org which requires an API key. I call the base URL in my MainActivity file with: private const val BASE_URL = "https://api.covidactnow.org/v2/" and then I've also created a Kotlin file called CovidData which...

Kotlin Hibernate Best Practice I need to implement a quite complex query including pagination, subquery, join, and projection. Here's the simplified version of the query SELECT t1.col_1, t1.col_2, t2.col_1, t2.col_2 FROM t1 JOIN t2 ON t1.col_1 = t2.col_1 WHERE t1.col_2 = :input1 -- Only if input1 is not null t1.col_2 = :input2 -- Only if input2 is not null ORDER BY t1.col_3 ASC -- Only if input1 is not null t2.col_3 DESC -- Only if input2 is not null OFFSET :offset FETCH NEXT :pageSize ROWS ONLY In this case...

Flutter 'onCreate' overrides nothing I want to add some kotlin code on my flutter app. I add it on project_name/android/app/src/main/kotlin/com/example/app/MainActivity.kt. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) if (!Settings.canDrawOverlays(getApplicationContext())) { val myIntent = Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION) val uri: Uri = Uri.fromParts("package", getPackageName(), null) myIntent.setData(uri)...

Kotlin Responsive webview not working, used a bunch of settings but it's not turning into a responsive webview private lateinit var binding: ActivityMainBinding class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMainBinding.inflate(layoutInflater) setContentView(binding.root) val mWebView = binding.webview1 mWebView.loadUrl("https://hotels.cloudbeds.com/") val webSettings = mWebView.settings mWebView.settings.useWideViewPort = true...

getting NullPointerException when testing fragment using Robolectric in android i am a newbie to testing android apps. i am trying to test a login fragment which has email, password fields and login button. here is the test code-> @RunWith(RobolectricTestRunner::class) class LoginSuccessTest { private lateinit var navigation: AppNavigationImpl @Before fun setupTestEnvironment() { navigation = mock(AppNavigationImpl::class.java) FirebaseApp.initializeApp(getApplicationContext()) } @Test fun loginSuccess() { val...

Passing data Jetpack Compose screen I am trying to pass data from a screen to another but overtime it sends null. I am using Jetpack Compose. @ExperimentalAnimationApi @ExperimentalPagerApi private fun NavGraphBuilder.addLanding(navController: NavController) { composable(route = Screen.Home.route) { val req: Place? by it .savedStateHandle .getLiveData("place") .observeAsState() SendPackageView(navController, req) { // optional: clear data so LiveData emits...

What is the name of this sliding selection list? I want to implement this type of sliding selection list in my kotlin based android studio app. but, I don't know what actually it is. so, plz help me

How to update textview in recyclerview on the fragment as edittext is updated? I am trying to update the my itemViews of recycler whenever i change one of the edittext is changed. For example, if my edittext says C20 is for cheetos (where C20 is eduttext and cheetos is textView), if i change it to L20, i want my textviews to be updated. I tried the following approach which is not working, my dataset is changed , but view is not updated. Am i missing anything here? attaching my rcv adapter below. Please look at updateStockDetail function. class RecyclerViewAdapterU (val...

Is coroutineScope just like block function in Kotlin? I'm learning CoroutineScope, I know launch{ } will not block work in Code A, so I get the Result A as I expected. I think I should get Result B2 when I run Code B, but I get Result B1, why? It seems that the coroutineScope block the programm to run until it finished, right? So I write Code C to verify my ideas, I get Result C just like coroutineScope block the program. Code A import kotlinx.coroutines.* fun main() = runBlocking { launch { delay(200L) println("Task from...

I want to multidelete in recyclerview with easy approach i am working on a app that has fragments and live data of images. i tired several approaches but couldn't succeed. can one guide me with some easy approach in kotlin

How to "Open Bottom Sheet Dialog" from "Bottom Navigation Bar" in Kotlin? I use bottom navbar from "ismaeldivita.chipnavigation.ChipNavigationBar" and i have a "Bottom sheet dialog". I need to open the Bottom Sheet Dialog from one of the menu items on BottomNavBar but i don't know how to implement to my Kotlin Code. someone please help me. and thanks for your help this my XML Code

Paging 3 with Rx (observable) instead of Flow I'm implemented android paging 3 library in my app, but data is transferred to rendering as flow. I would like the data to be transmitted to rendering as observable. How can i do this? Mapping data from PagingSource to Flow: override fun observe(date: LocalDate): Flow = pagingHistory { historyDao.observeByDate( fromDate = dateFormatter.formatIsoDate(date), toDate = dateFormatter.formatIsoDate(date.nextDay()) ) } private fun pagingHistory(...

Android Kotlin coroutine crashing sometimes I see in google console under crashes and ANRs signal 11 (SIGSEGV), code 1 (SEGV_MAPERR) with : backtrace: #00 pc 000000000080e2c0 /data/app/~~aD8u01A497bLZRMvkEbJ1g==/com.my.app-z6uTL_p-g6ZENWn3VaIing==/oat/arm64/base.odex (com.my.app.loader.external.MyLoader.doLoad+272) #00 pc 0000000000736fdc /data/app/~~aD8u01A497bLZRMvkEbJ1g==/com.my.app-z6uTL_p-g6ZENWn3VaIing==/oat/arm64/base.odex (com.my.app.loader.SimpleMyLoader.load+732) #00 pc 0000000000dcd1f8...

ViewPager create 2 items at a time I have a viewpager made up of fragments that contain a recycle view. Now the viewpager creates 2 items at a time, which makes it impossible to correctly submit the list, and the data is displayed incorrectly. How can I fix this? Here is my adapter : class ScreenSlidePagerAdapter(fm: FragmentManager) : FragmentStatePagerAdapter(fm) { override fun getCount(): Int = 4 override fun getItem(position: Int): Fragment { return SalesOfficesFragment() } }

Is invoking a suspend function directly just like it wrapped with coroutineScope in Kotlin? I'm learning CoroutineScope. Both Code A and Code B get the same Result AB. I know all code in coroutineScope should be finished then run next code, so I think I can get Result AB for Code A as I expected. The suspend fun doWorld() return Unit, I don't know why the system need to wait for displaying "World" first in Code B, I think Code B is just like Code C. What wrong with me? Code A import kotlinx.coroutines.* fun main() = runBlocking { coroutineScope{ doWorld()...

Kotlin Problem Delegating to Map with DefaultValue - Language Bug? In the following code, where MyMap trivially implements Map by delegation: foo@host:/tmp$ cat Foo.kt class MyMap (val impl : Map ) : Map by impl { fun myGetValue (k: K) = impl.getValue(k) } fun main() { val my_map = MyMap(mapOf('a' to 1, 'b' to 2).withDefault { 42 }) println(my_map.myGetValue('c')) // OK println(my_map.getValue('c')) // ERROR } Why do I get the following error on the second println? foo@host:/tmp$ /path/to/kotlinc Foo.kt foo@host:/tmp$ /path/to/kotlin FooKt 42...

Filter on list by a generic column in Kotlin Android I am using Kotlin and trying to filter on a generic class, therefore I don't actually have the name to go after the it.__ Is there a way of filtering on a generic column name ? Using map{columnName} actually works, but I want the whole table, not just that column returned. override fun getData( tableName: String, searchTerm: String?, columnName: String? ): List { for (clazz in getAllEntityClasses()) { if (clazz.simpleName == tableName) { val list =...

Pending Intent Notification fired automatically I want to add a local notification in my app. While calling the function for adding the notification with AlarmManager that time the notification fired instantly.(Also In second call) I tried multiple way but no solution found. I use unique id but it's not solving my problem. Here is my code: fun setNotification(allList: ArrayList, context: Context) { val fSchedule = getFilteredClass(allList) (0 until fSchedule.size).forEach { val time = fSchedule[it].diffInMilli - 300000L...

Best practice to update ConcurrentHashMap with atomic values I have the ConcurrentHashMap map and I need to update some value in there. I wrote the following code: map.compute(key) { _, value -> value?.also { reference -> reference.set(getNewValue()) } } It works well, but I'm not sure that it is an optimal solution for this case. Is there any kind of better practice?

No type arguments expected for interface Callback I'm a mid-Senior level Android developer who is working on some projects to upgrade my skills. While developing one of my projects. I came across the following error: C\Users\animesh.vashistha\StudioProjects\MovieListApp\app\src\main\java\com\example\movielistapp\MainViewModel.kt (21, 43): No type arguments expected for interface Callback My MainViewModel looks like this: package com.example.movielistapp import android.graphics.Movie import androidx.lifecycle.MutableLiveData import...

fab isn't being anchored afted calling onBackPressed() I have an activity with bottomAppBar and a floatingActionButton anchored on it but after calling onBackPressed() method, it is flowing on the bar, and I need something like what I said. Here is my code: class AppUiActivity: AppCompatActivity() { private lateinit var navController: NavController private var backPressedTime: Long = 0 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) val binding =...

How to add a login and password Button to leanback kotlin app? I am trying to make a Leanback tv app and trying to add a Login /Password button to the layout I tried adding a Textview into Activity but it doesnt work Is this how we are supposed to add a text view to the app or do i need to add some other type of Activity and make it the default launcher activity and then go to next Fragment activity.? I cant find any code which gives both in one Kotlin app

Saving checkbox states in RecyclerView inside Fragment using SharedPreferences or any other method I'm trying to save checkbox states in RecyclerView inside Fragment to restore these preferences after exit from the app and loading it again. I have a ConfigActivity for AppWidget in which there are fragments. Inside of one of the fragments I have a RecyclerView which loads calendars available for the user from Calendar Provider. Based on selected calendars the appwidget will be loading the events from them. Selected calendars should be passed into the appwidget. I've made saving states of...

use flow value of Jetpack datastore I'm trying to implement an onboarding screen on my app which uses jetpack compose, the screen will open only for the first time of using the app, and "onboarding" boolean value is saved on datastore preferences afterwards. if you know any better way to store datastore preferences i'd like to know too please, my minimal example that shows the problem: val Context.dataStore: DataStore by preferencesDataStore(name = "settings") val ONBOARDING = booleanPreferencesKey("onboarding") class...