What happens if my RecyclerView adapter is reinitialized several times? I have some recycler view code in a function that gets called several times as bluetooth devices are scanned. My code is working but I am wondering what unseen effects are occurring from having my recycler view initialization code in a function that gets repeated a lot? I eventually want to update the list rather than replace it via notifyDataSetChanged() but I am unsure how to do that with my current code structure. Any help would be appreciated! @SuppressLint("MissingPermission",...

GooglePay integration without using of deprecated Activity's onActivityResult The method onActivityResult of Activity is deprecated. The integration of GooglePay from official documentation using the onActivityResult method. Is there the alternative integration way to avoid the using of this deprecated method?

Animate icon during data loading and transint it to the static state with animation wnen loading finished How implement animation with the next behaviour: When data is being loading icon should be animated like a pendulum (-15 to 15 degree) When data was loaded icon should be changed to another one with alpha channel animation, namely: Loading state: Animation { ImageView: icon1 from: -15 degrees to 15 degrees } Loaded state: Animation { ImageView: icon1 -> icon2 from: -15 degrees to 15 degrees to 0 degrees alpha: icon1 (1.0 to 0.0) -> icon2 (0.0 to 1.0) } Note: I wrote animation for the first...

Filter Recycler View content by pressing button in PopupWindow in Kotlin Hello i made a recycler view of «anuncios» for selling houses , and i want to create a filter ,by pressing a button inside a popupwindow, that will filter the data, based on that parameter (for example, there is 4 buttons in this pop-up window (1 bedroom, 2 bedroom, 3+ bedroom , all), and when i press each button, it appears in the recycler view the correspondent data. I know how to create the pop-pup window, however iam struggling in finding the best approach in changing the data in my...

Is it possible to create a string representation of a lambda in Kotlin? I'm trying to get a toString or something similar of a lambda expression. For example: We have this expression val isEvenThan1 = { x: Int -> if (x % 2 == 0) 1 else 0 } We wan a string output similar to this "(x) -> { if (x % 2 == 0) 1 else 0 }" I'm primarily looking for any libraries or work arounds to be able to output the internal logic of a function.

Is it ok to use an empty override method? In java and kotlin . Or what is the best way ? Is it true way with SOLID? E.g : @Override public void xJavaFunction() {} or override fun xKotlinFunction {} is it true way in SOL(Liskov substitution principle)ID

Kotlin Desktop Compose Does Not Refresh Main View Every time I click on a tile in my board it should refresh the MainView() so a red border can be on the tile, but it doesn't refresh the view. Is there any way to update the view every time the board changes? Application Start: var board: Board = Board() fun main() = application { board = Board() Window(onCloseRequest = ::exitApplication, title = "Castle Run" ) { WindowContent(::exitApplication) } } UI: @Composable fun FrameWindowScope.WindowContent(onExit: () -> Unit)...

How to Change recycler view data according to TabItem My app makes the call in an api where it returns an "x" number of posts, in the following example 2 posts are returned, 001 and 002, but this can change and return 10 posts. I already created the code to add a Tab item for each post, but how do I link the clicks to each list and put it in the adapter of the recycler view according to the click on the Tab? my code: val arrayList : ArrayList = arrayListOf() for (posto in listaIDPostos){ var list : MutableList = mutableListOf()...

Change lambda expression return type to Unit navigation bar i am very beginner. sorry if its too easy or im stupid. i want to make bottom navigation menu with material design 3 kotlin. but this error comes. i want to change visibility of scroll view. what is problem? NavigationBarView.OnItemSelectedListener { item -> when(item.itemId) { R.id.main -> { likes.visibility = View.GONE mainmenu.visibility = View.VISIBLE } R.id.starred -> { mainmenu.visibility =...

Kotlin Multiplatform freeze object I'm new to kotlin multiplatform, and I need to freeze an object as I'm still using the strict memory model. But I cannot solve this dependency on android studio, on my multiplatform module: The following reference cannot be resolved: import kotlin.native.concurrent.freeze I'm using kotlin 1.6.10 and multiplatform corutines version 1.6.0-native-mt. Do I have to configure something else to be able to freeze objects on a multiplatform module?

Android- replacing a fragment inside fragment container (containing multiple fragments) replaces the whole container rather than that one fragment I have a fragment container, which contains multiple other fragments, but when I am trying to replace one of the fragments inside the fragment container(to reload that fragment), the fragment does get replaced but instead of only that particular fragment getting replaced the whole container is getting replaced by that fragment and even when navigating to other fragments only that fragment is showing up. I only want to replace one particular fragment present in the container not the whole...

Kotlin error: Dagger does not support injection into static fields i tried to use Dagger for dependency injection in my Retrofit project, but when I build the code it throws this error : Dagger does not support injection into static fields. Does anyone have any idea why I get this error? i cant figure out what I did wrong. MianActivity.kt: @Inject lateinit var mApiService : ApiService class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

is ValidatedNel arrow-kt in v1.0 still an Applicative (Functor)? I understand that in previous versions of Arrow-Kt was an instance of the Applicative typeclass. In the current version 1.0.x, most typeclasses are no longer present/visible (to make the library more accessible, I presume?). There are some excellent explanations why an error accumulating Validation data type can't be a Monad, for instance Haskell 1 and <a...

Android cameraX not saving photo I have followed the android codelab of cameraX implementaion up to the ImageCapture use case (https://developer.android.com/codelabs/camerax-getting-started#4). I'm using android studio emulator with Pixel 5 API 31. The PreviewView is presenting the camera stream, but when I'm hitting the take photo button nothing is happening. no Toast message and nothing wrong in the log. What am I...

getLastKnownLocation returns null for getting location for latitude and longitude Here is my code private var longitude = "" private var latitude = "" val lm = activity?.getSystemService(Context.LOCATION_SERVICE) as LocationManager? if (ActivityCompat.checkSelfPermission( requireActivity(), Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( requireActivity(), Manifest.permission.ACCESS_COARSE_LOCATION...

Java code size increases while using android app I have developed a compose app which retrieves data from Socket each 3 seconds. While using app I recognized that after some time working with app it crashes with Out of memory. I profiled my app (release version) an saw that while using app java code increase until it crashes with OOM error. any ideas?

I can't use subscribewith in kotlin i can use subribeOn and obseveOn but it say Unresolved reference: subscribeWith when i try to use subscribewith so can someone help me?

Unable to get longitude and latitude kotlin android Here's my code: private var longitude = "" private var latitude = "" In the oncreateView, I have to do a api call with my latitude and longitude data. But the value of latitude and longitude never change! //location fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(requireActivity()) // getCurrentLocation checkPermissions() //CALL API val request = Request.Builder() .url("...

how to sync recomposition with state change? i have list of items when i delete item by it's id it delete related from DB and state list but in ui delete last added item id when i repoen the screen the ture list will shown //UI File val state = boardSessionViewModel.sessionState.value state.nodes.forEach { MultipleDraggableObject(...

MainActivity does not implement interface dagger.hilt.internal.GeneratedComponent or interface dagger.hilt.internal.GeneratedComponentManager I'm learning to use Jetpack Compose and I was trying to follow a tutorial to create a Pokedex with Hilt and MVVM, everything was going well until I tried to implement the viewModel, when I injected it and tried to run the app, I got the title error ( Given component holder class com.example.pokedex.MainActivity does not implement interface dagger.hilt.internal.GeneratedComponent or interface dagger.hilt.internal.GeneratedComponentManager ), I already tried several solutions from the forum...

Do-While Loop When Media Player Is Playing In my app there is a "Start" button. The desire result is whenever the media player is playing,the text of the button should be change to "Stop", and when the music stops the button text should change back to "Start". I tried doing "Do While Loop" as a solution, but even when media player isn't playing,the text is changed. Is this the right solution ? Why does it work even when mainViewModel.mediaPlayer.isPlaying is false? This is what I tried: private fun trackPlayButtonTransformation() {...

Show warning dialog before activating unknown sources In my application I need to install the Apk and the user must activate the unknown sources after Android O and the known method is as follows binding.btnInstall.setOnClickListener { if (!packageManager.canRequestPackageInstalls()) { val openSettingsIntent = Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES).apply { data = Uri.parse("package:$packageName") } startActivity(openSettingsIntent) }else{...

Is there a way to create a slider count in android using kolin language? The above question talks about an app to be created using kotlin language, it describes the increment of values like from 1 to infinity by sliding the slider bar. This is an android app.

Getting new Instance ID token (Kotlin) Kindly help me fix this. Android studio raises a "Unresolved reference: token" red alert on the val token_id = taskInstanceToken.result.token; line after trying to build project on this code Log.i(TAG, "Get Token Listener, Token ID (token_id): $token_id") val current_id = task.result.user!!.uid mFirestore!!.collection("users").document(current_id).get()...

Jetpack Compose Tests cause "java.lang.IllegalStateException: no event up from DESTROYED" when run in succession I have instrumented tests I'm running on an application using Jetpack Compose. The tests pass independently, but when run in succession, I receive: java.lang.IllegalStateException: no event up from DESTROYED along with a call stack including some lines in my entry-point composable that seem to indicate that the NavController implementation is to blame. The issue isn't reproducible in the non-instrumented build running on the same device so I have a feeling it's how I'm implementing the...

how to use viewbinding in listview? I'm a newbie.I find the listview doesn't show up if i use viewbinding to control the listview.the code is class MainActivity : AppCompatActivity() { private val data = listOf("Apple", "Banana", "Orange", "Watermelon", "Pear", "Grape", "Pineapple", "Strawberry", "Cherry", "Mango") private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMainBinding.inflate(layoutInflater)...

Kotlin, Recyclerview reusing items but updating item colour I have a recyclerview which displays a calendar. I have created a flow which populates the 42 DayOfMonth tiles and an observer submits it to the adapter. My aim was to have the next and previous month's tiles in grey (these are sometimes shown in the first and last row, depending on the first day of the month). The provided code works on initialise and everything is coloured correctly. When the user clicks a tile for...

Visibilty gone layout of custom dialog from another function I have a custom dialog in kotlin fragment which have 2 button and a progress bar in fuction submitSpk() fun submitSpks (){ val inflater = context?.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater val builder = AlertDialog.Builder(context!!) val dialogView = inflater.inflate(R.layout.activity_signature, null) builder.setView(dialogView) builder.setTitle("Tanda Tangan Pembeli") //builder.show()...

How to compile mixed kotlin and java from command line? I hava two files: A.java class A{ } B.kt class B:A(){ } I try to compile B.kt like this: kotlinc -cp A.java B.kt But compile error: WARN: zip END header not found: A.java B.kt310: error: unresolved reference: A How show I compile B.kt ?

How to differentiate Swipe up / Swipe down and Resize events in Android , iOS Web browsers I have a web application when i need to implement the Resize event listeners and swipe up/ Swipe down in Mobile browsers. Resize event - I need this to do some handle some functionality when soft keyboard open when i focus on any input on the page. Swipe Up/Down - I need this to do some functionality when use users scrolls or swipe up or down the page. Please share some resources to get started with it. In iOS resize event is not getting called but in Android i am able to differentiate resize...