Get Data from Firebase but I got error View.findViewById(R.id.tv_percent) must not be null Does anyone can help me ? I want to get data from firebase, all the code already green but when I try to move to my IOT fragment it forced close and the error: java.lang.NullPointerException: itemView.findViewById(R.id.tv_percent) must not be null Here's my IOT Fragment class IOTFragment : Fragment() { private var _binding: FragmentIotBinding? = null private val binding get() = _binding!! private lateinit var sensorRecyclerView: RecyclerView private lateinit var sensorList:...

Is it possible to animate or use a video to replace an icon with BottomNavigationView I have a basic BottomNavigationView with icons, but I really wanna make the menu icons different, by animating or the best option would be using a mp4 video to replay. I have the file in three formats, SVG,mp4 and Gif.

[Android][Retrofit] Using interceptor to call different an API I am working on an Android project which uses retrofit to handle network calls. I have a hard time figuring out a use case. I have an API (api1) which has already been implemented and is being called from multiple places. Now, I need to call a new API (api2) before calling api1. What would be the best way of doing this ? Can I use interceptors for this purpose ? Are interceptors the best way to handle this use case ? public class MyApi2Interceptor implements Interceptor { @Override public...

can I use callbackFlow even though I have not a callBackListener I'm using GraphQL to fetch the data from the server. The SDK is not suspendable, and I'm trying to use Clean Architecture. So I came up to return a Flow in my repository to allow the UseCases to fetch the server's response. So I have this code in my repository: override fun singUp(model: SignUpModel): Flow = callbackFlow { ... client.mutateGraph(signUpQuery) .enqueue(object : GraphCallResultCallback { override fun...

How to print an array element (a,b) instead of (ab) in kotlin? val letters = "abcdefghijklmnopqrstuvwxyz~'!+%&/()=?-:;|@£$#{[]}|0123456789".toList(); val pairs = letters.flatMap {first -> letters.filter{second -> first != second }.map{second->first to second }}; println(pairs[0]) I'm tryig to get all possible combinations of english characters like (ab),(ac),(ad)...... this code's output is: (a,b) I want to print it like: (ab)

android:exported needs to be explicitly specified I have checked all activities in the manifest.xml file, all activities are present with android:exported="true" but it retainlessly showing this error **Manifest merger failed : android:exported needs to be explicitly specified for element . Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See <a href="https://developer.android.com/guide/topics/manifest/activity-element#exported"...

I want to not dismiss the runtime permissions dialog when I click back button in Android 11+ When i Click Back Button in android 9, it doesn't do anything but in Android 11 it dismiss the permission Dialog. Is there any solution to not dismiss the runtime permissions dialog when I click back button in Android 11+ ?

Kotlin: Error 503 when loading image from flickr with Picasso My app loads images from flickr using Android's Picasso library. Curiously it was working fine sometime ago after migrating my app to Kotlin, but now I've started to have "random" 503 errors. I've set all the permissions in flickr control panel for each image so they're fully public and set security to lowest level to no avail. At first I thought lowering security in flickr was the key, but was wrong, because I'm still having this issue. Maybe it is not related to Kotlin migration at all, but...

How to have different screen and audio languages in kotlin? Currently working on an app where I would like the user to be able to select a different talkback language than the written language displayed on the screen. For example I would like to have it display a string in english and then read that string out loud in spanish. Right now when I try to select Spanish as the audio language while displaying english strings - it just reads them phonetically with an english accent. Below is my code for when an audio language is selected. private fun...

How do I retrieve a value from a list of objects in Kotlin? I've been spinning my wheels on this for a while. I have made my api call and successfully returned the data I'm looking for. I have taken this data and inserted it into a database. I've verified all of the info I need is in the database through the database inspector. Now I am looking to retrieve the data from the database, and populate a spinner with that data. Specifically I'm looking to retrieve a list of colors from SeedColors @Entity(tableName = "colors") data class SeedColors(...

What is the best way to persist state in composable recreation in Jetpack Compose? Consider we have the following structure in a toggling implementation scenario: @Composable fun RootComposable() { var someAuxToggle by remember { mutableStateOf(false) } if (someAuxToggle) { FirstComposable { someAuxToggle = !someAuxToggle } } else { SecondComposable { someAuxToggle = !someAuxToggle } } } @Composable fun FirstComposable(auxCallback: () -> Unit) { val myRandomNumber by remember { mutableStateOf(Random.nextInt(100)) } Button(onClick = { auxCallback() })...

Why does Hibernate validator in Spring Boot not address field validation constraints after processing class constraints? I am trying to use Spring Boot Validation/ Hibernate Validator in one of our services and for the purpose of that service I created a DTO where I set customized constraints to the DTO root and on its fields. The DTO looks like this: @JobIsInUserQueue @CanPerformTask class PerformableJob( @HasCurrentTaskList val job: Job, val user: Person ) Given I have defined those annotations, and the implementation classes following the Jakarta validation framework API, When I create an...

Can I observe the change fo a variable in Kotlin? I know I can use get a notification when the value of a variable has changed, Code A is OK. I hope to monitor the change of a normal variable such as var myFilename="OK" in Code B, but myObserv isn't launching when myFilename has changed. Can I observe the change fo a variable in Kotlin? Code A var savedFilename: String by Delegates.observable("") { prop, old, new -> ... } Code B var myFilename="OK" var myObserv String by Delegates.observable(myFilename) { prop, old, new ->...

Convert UTC Date to LocalDateTime (with support to older Android APIs) I'm looking for a way to convert UTC date to LocalDateTime without limiting to API 26 (Android O) and above. Is there an alternate way to do this that will support API levels below API 26? I've currently got this and it works for devices running 26 and above: @RequiresApi(Build.VERSION_CODES.O) override fun utcToLocalDateTime(utcDate: String): LocalDateTime { return utcToDate(utcDate).toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime() } Please let me know if theres an...

how to rewrite code from kotlin to golang i need to convert below code from kolin to golang, any help is appreciated! this code is generate and nft token id, im don't know any about kotlin, help me please. full code: <a href="https://github.com/rarible/ethereum-indexer/blob/d6813d9ac6d86ad31a6e6238efaaa5aecb17a437/nft/api/src/main/kotlin/com/rarible/protocol/nft/api/service/colllection/CollectionService.kt" rel="nofollow...

Get current and previous value in flow's collect I need to handle current and previous value in flow collect, so I need some operator that acts like that: ----A----------B-------C-----|---> ---(null+A)---(A+B)---(B+C)--|---> One idea is something like: fun Flow.withPrevious(): Flow = flow { var prev: T? = null this@withPrevious.collect { emit(prev to it) prev = it } } But this way there is no control over a context in which first flow will be executed. Is there more flexible solution?

Android registerForActivityResult launch never prompting for Permissions I am trying to simply prompt for WRITE_EXTERNAL_STORAGE in a hello world targetSdk 28 Android app running on a Android 12 Pixel 5. The whole project is here: https://github.com/paulpv/AndroidPermissionsTest The main code meat is: private var runAfterRequestWriteExternalStoragePermissions: (() -> Unit)? = null private val writeExternalStoragePermissionsRequired =...

Mockito Test: verify static method was called inside object class // i am writing junit first time need to help any one seems to mock all static methods in the class: Actually, there were zero interactions with this mock. Wanted but not invoked object ExerciseMainLogger { fun setLog() { AnalyticsLog.insertEventLog(builder) } } object AnalyticsLog { @JvmStatic fun insertEventLog(eventBuilder: EventBuilder) { if (TestConfig.isTestMode()) { LOG.d(TAG, "[SA] test mode") return } val eventLogs =...

Google Ads publisher account Reactivated but ads not showing in app I am using admob ads in android app, Google blocked me for 30 days, after unblocking the ads never appear in the app. can you help me?

Mapbox latest implementation for rout drawing and navigation? Before i was using Map box below sdk for rout drawing & navigation builder. implementation 'com.mapbox.mapboxsdkmapbox android navigation ui0.42.6' The issue is that it requires READ_PHONE_STATE permission and when i try to build my apk it shows very large apk size. can anyone help me for this issue. i need it urgent basis. I need latest implementation with small apk size.

Inflating BottomSheetDialog from an item click in a RecyclerVIew? I have implemented a method that launches the BottomSheetDialog but I am facing this error android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running? at android.view.ViewRootImpl.setView(ViewRootImpl.java:907) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:387) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:95) at android.app.Dialog.show(Dialog.java:342) at...

How produce an Icon for the Notification.Action.Builder(...) constructor parameter? Notification.Action.Builder() constructor takes an Icon as input parameter, but I don't know how to produce an Icon? There seems to be no info on that. Old Builder constructor which takes a drawable Int is now deprecated. public Builder(Icon icon, CharSequence title, PendingIntent intent) { throw new RuntimeException("Stub!"); }

YoutubePalyerAPI not working in android 11 YoutubeplayerAPI not wokring in android 11, After player successfully initialized on loadvideo video keeps loading. This issue present in xiaomi ,realme ,oppo devices with android 11. Manifest File : android:usesCleartextTraffic="true"

Load Image and Videos into Recycler View Does someone know of a library or methodology I can adopt to have a recycler view that shows videos and images like Facebook and Instagram? I want the videos to play as it comes into focus and stops playing when not in viewer focus. Not pressing play for playing videos or pressing stop for stopping videos. It should happen automatically. Any help will be greatly appreciated!

Shareable/editable text file for shared shopping list So, for fun purposes only, I'm developing an app that me and my family will use while on a two weeks vacation. Its purpose is to have an all in one tool for various things like GPS navigation, newsboard, media gallery etc The only feature missing (from the set I wanted to add to the app) is a shared shopping list but since I wanty to keep things as quick as possible (I'm just giving the apk to everyone and let the app work locally) I need a service that hosts text files that can be retrieved,...

How to display the item list vertically on each page horizontally? I want to display 3 items vertically and can scroll horizontally from page to page

Snackbar over multiple activity's I have a snackbar but when switching activity's it stays on the original activity it had been activated. Is there a way to make it stay on screen when switching activity's? val mainSnackBar = Snackbar.make(findViewById(android.R.id.content), "", Snackbar.LENGTH_SHORT) val llp = LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT) llp.topMargin = 20 llp.bottomMargin = 20 This is the code when clicking on a...

Issue with saving/restoring state of navigation controller state I have an issue with the case when the Activity is destroyed if it's been a long time in the background (also reproducible with the don't keep Activity developer option). So, I get an exception: java.lang.IllegalStateException: You must call setGraph() before calling getGraph() on this line of code (multiple graphs, that's why .graph is used to get the current one) val myViewModel: MyViewModel = by navGraphViewModels(findNavController().graph.id) {...

Kotlin "when in range" not working for negative numbers I'm passing -3.0 (Hard coded for my testing purpose) to "when" conditions here result was always comes zero (0 - execute else statement). Positive numbers working fine, Negative numbers comes that time only not working Below I'm shared screenshots for reference.

Jetpack Compose - How to define particular Compose view role with XML Themes using MDC Theme Adapter So I'm trying to use XML Themes to work with my ComposeView using Mdc Theme Adapter. for example, I have Text(text = "Email", modifier = Modifier.padding(bottom = 4.dp, top = 8.dp)) how to define Text compose view as a Body or maybe Headline Color such as Primary and onPrimary is changed, but not the font. textAppearanceButton also not changing even though already implemented, just color works