How do I pass a List<List<T>> to my fragment? I am trying to use ViewPager2 and for each new fragment created, to pass in some things in the bundle. There are two things I am not sure about, my class structure and the factory method newInstance() for creating the fragment. abstract class Theme(@DrawableRes backgroundRes: Int) @Parcelize data class BackgroundTheme(@DrawableRes val backgroundRes: Int): Theme(backgroundRes), Parcelable @Parcelize data class FontTheme(val fontName: String, @FontRes val fontRes: Int, @DrawableRes val...

Why Kotlin not have treeSet and treeMap collections? I am not able to find treeSet and treeMap implementation in Kotlin. Studio is also not detecting those collection. Is there any alternative for these two in Kotlin?

why exception throw excute before thread finished sleep in kotlin(or java) thread(isDaemon = true) { var size = 100 while (size > 0) { size-- println("count $size") val t = Thread.currentThread() println("$t") Thread.sleep(200) } throw Exception("error cause nothing") }.start() i write above code for testing my android app exception caught tool when app crash. result: could somebody can explain the reason?

receive random event like headset plug out when register the headset broadcast android In my app, i want the user can listen to the audio from Bluetooth, headset and speaker so I provide one spinner and If Bluetooth is connected then the spinner add Bluetooth, and headset also connected then spinner add headset too. But when I start service in concrete to register Bluetooth and headset broadcast receiver and run the app I get the headset plug out the action from the headset broadcast receiver even if the device is not connected to Bluetooth and headset device or plug out from...

upload files apollo android I want to upload images to apollo-server server mutation schema,"create post" take text and files and should store files and create post const mutation = new GraphQLObjectType({ name: 'Mutation', fields: { createPost: { description: 'Create a new Post', type: GraphQLID, args: { text:{ description:"description", type:GraphQLString }, files: { description: 'images and...

Access private methods inside ViewModels and other classes using Mockito, Junit in Kotlin **This is how to access the private methods inside a viewmodel class or any other class in kotlin. When it is required to pass multiple parameters to a method. We need to create an array of Classes which are required to pass to the method. Then in the invoke method we need to pass the parameters. If the method is returning something like List, Object, String then we can verify the outcome from the method call using the verify method.** @RunWith(MockitoJUnitRunner::class) class...

How to hide under line color of the edittext when it focused How to hide the underline color of the edit text when it focused. At the same time when it unfocused I want to show underline color in android

Apache Camel - Increase in count of running NettyClientTCPWorker threads with every request I am using a splitter which calls routeA or routeB in parallel. val splitterBeanName: String? = getEndpointSplitter() val aggregatorBeanName: String? = getEndpointAggregator() from("direct:${splitEndpoint.getEndpointRouteName()}") .split() .method(Class.forName("${Paths.SPLITTER_CLASSES_PATH_PREFIX}$splitterBeanName"), "splitRequest(*)") .aggregationStrategy( getAggregator(...

app doesn't play sound or access mic of bluetooth and headset only play sound in speaker and use mic of speaker android In my app, I want the user can check test sound in Bluetooth, headset, and speaker and check the mic in Bluetooth, headset, and speaker But test sound is played only in speaker and sometimes in the headset(mostly playing in speaker even if the audio manager is connected to Bluetooth or headset) and in mic always detect speaker even if the audio manager is connected to Bluetooth or headset. Here audioUtil public class AudioSourceUtil { public static String TAG = "AudioSourceUtil";...

How can I stop Bottom sheet enter animation when returning to screen without disabling all animations I have a BottomSheetDialogFragment with the default enter and exit animation. When the lifecycle chages (eg. go to home screen and return to the app) the bottomsheet starting animations plays. I have tried disabling animations with setWindowAnimations(-1), however this also disables the exit animation when closing the dialog, which is not an option. I show my bottomsheet this way: MyBottomSheet.newInstance( ... ).show(parentFragmentManager, null)

Caused by android.database.CursorWindowAllocationException I am using the room database in my application. I have a feature to download some content within my application. When each content is saved in my DB, I need to update a table that has columns that indicate whether each content is saved or not. We set a boolean in the table when content is saved. So the flow is: Call an API, save its contents, and after saving update column in another table to true. This happens for multiple APIs. Each content save success will have the update query executed...

Receiving com.google.gson.JsonSyntaxException: java.lang.NumberFormatException: error when loading Byte Data as Response from Retrofit I'm receiving an image from an API call to the server in the form of . But when I receive the Retrofit2 Response it causes the errors stated above. Here's my Application Retrofit Object btw: object RetrofitInstance { private val client = OkHttpClient.Builder().apply { addInterceptor(MyInterceptor()) addInterceptor(HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))...

Response before coroutine resolved, kotlin Hello stackoverflow! I am writing a little service web app that accepts data for sending an email using spring boot kotlin. My question is how to make controller respond instantly after a request received and send the actual email in the background thread. Firstly controller sends the email then publishes message on rabbitMQ and only after that returns respond as a specified string. @RestController class MailController(private val emailService: EmailService, private val msgSender:...

SuspendCoroutine code not reachable when using with Firebase auth I have a suspendCoroutine in my repository with which I want to send data back to my ViewModel - suspend fun sendPasswordResetMail(emailId: String): Boolean { return withContext(Dispatchers.IO) { suspendCoroutine { cont -> firebaseAuth?.sendPasswordResetEmail(emailId) ?.addOnCompleteListener { cont.resume(it.isSuccessful) } ?.addOnFailureListener {...

org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during psi2ir in Jetpack compose I am getting this error during compilation or code generation, I have set the jetpack compose dependencies and working on it, I have made some compose components and previews are visible but during compilation I am getting this issue. I am on Android studio ArticFox File being compiled: (154,13) in /Users/vipulthawre/AndroidStudioProjects/tbappCompose/base-question-module/src/main/java/com/testbook/tbapp/base_question/MamcqPracticeHtml.kt The root cause java.lang.StackOverflowError was thrown...

Kotlin Multiplatform project include cocoapod dependency Trying to setup cocoapods for my Kotlin MPP: plugins { kotlin("multiplatform") version "1.5.10" kotlin("native.cocoapods") version "1.5.10" id("com.android.library") id("maven-publish") } Syncing the project ends up in this error: Execution failed for task ':podspec'.

this and base files have different roots: C:\Users\user\AppData\Local\Temp\wrap6957loc\gradlew and G:\Workspace\tracking-lib.

I am on windows and always will be. The project should build on Windows and Mac....

How to make one fragment and one view model from two fragments and two view models? I have two Fragments: AllFragment and FavoriteFragment. AllFragment.kt class AllFragment : Fragment(), ItemFavoriteClickListener { private val viewModel: AllViewModel by viewModels(factoryProducer = { AllViewModel.Factory() }) private var adapter: MyItemModelsAdapter? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) viewModel.items.observe(this) { adapter?.items = it } }...

java.lang.IllegalStateException encountered when saving in an entity with FetchType.LAZY I have this entity that have this property open class LockKey { @Id @ManyToOne(targetEntity = Key::class, fetch = FetchType.LAZY, cascade = [CascadeType.PERSIST, CascadeType.REMOVE]) @JoinColumn(name = "key_id") @JsonIgnore lateinit var key: Key } When I create a new LockKey I get this error (newLockKey is with type Key) var lockKey = LockKey() lockKey.lock = lock lockKey.key = key Failed to convert property value of type 'java.util.UUID' to required type...

How to animate BottomSheetDialogFragment in Android? I have a BottomSheetDialogFragment that I would like to animate by applying Bézier curve on its entry and exit. I have managed to apply simple animation this way override fun onActivityCreated(arg0: Bundle?) { super.onActivityCreated(arg0) dialog?.window?.attributes?.windowAnimations = R.style.BottomSheetDialogAnimation } where the style is @anim/bottom_sheet_slide_up @anim/bottom_sheet_slide_down but I'm stuck how to do it with Bézier curve animation.

Android Kolin: building group video chat app where the host can see all participants and the participants can see the host only I am trying to build an Android group video chat application using Kotlin. But my group video chat app has a certain requirement which is the host can see all the participants in the meeting and the participants can see the host only. First, I tried to use the Zoom API. But the thing is that all the users can see each other and it does not offer the feature I need. I also looked into this article, it does not offer me what I need either. I also found this service, <a...

Dismissing all dialogs of DialogPreferences in a PreferenceFragmentCompat What I am trying to achieve is to have a list with a reference to all dialogs opened by a Preference (can be an EditTextPreference, a ListPreference ...). Then, when the device screen is deactivated I want to be able to close (.dismiss()) all open dialogs. This is an example layout file for a PreferenceFragmentCompat: I managed to get it to Work for a EditTextPreference by changing it to a Preference and creating the Dialog and handling saving myself like this inside...

I want to get last three months from current month in Kotlin Using AndroidStudio, tab layout using viwepager2 guys actually my logic is that I want to basically show a current month with the last three months in tab layout which I am using to show the months wise data to the user so if present its "June" so I want to show tabs "April, May, June" these 3 months data to the user.

why does my flutter app not work after repeated reinstallations of java and gradle? I have a problem with my Flutter app. When I tried to start my app via an emulator, I got the following error message: FAILURE: Build failed with an exception. What went wrong: Execution failed for task 'appcompileDebugKotlin'. Kotlin could not find the required JDK tools in the Java installation 'C:\Program Files\AdoptOpenJDK\jre-11.0.11.9-hotspot' used by Gradle. Make sure Gradle is running on a JDK, not JRE. Try: Run with --stacktrace option to get the stack trace. Run with --info or...

I want to create ads with dot navigation What is this called? How to implement it in app using kotlin? I want it to navigate automatically after specific time like in amazon.

How to use PagingSource and Room with fields annotated by Embedded I want to use Paging 3 Library for pagination with db as SSO and I have some data classes which use Embedded annotation (one to many, relation) sample ↓ data class PojoEmbended( @Embedded var messageEntity: MessageEntity, @Relation( parentColumn = "messageId", entityColumn = "messageId", entity = AttachmentsEntity::class ) var listAttachments: List ) AttachmentsEntity looks like this↓ @Entity( tableName = "ChatAttachments", foreignKeys =...

How to Use Kodein instance in attachBaseContext? I need to access my SharedPreferences instance (dataHandler) in the attachBaseContext of my MainActivity,so I set the locale there, but the dataHandler instance is not available there as the injection is happening in the onCreate method, which is running after the attachBaseContext call. dataHandler allways null. I am using kodein , android studio, kotlin. class MainActivity : AppCompatActivity(), KodeinAware { override val kodein by kodein() private val dataHandler: DataHandler by...

Is it safe/right to store objects in application memory? In my flutter application, I want to access some data on many pages. So I created static final variables and assigned the data on app startup. My doubt is, if the application is so long in the background, will the os remove the object and that cause the app to crash or something when the app resumes?

Android Hilt - Inject an adapter into an adapter I have nested lists so nested adapters structure in my code for some expandable custom views. I am using hilt library and I want to inject ShipmentAdapter into TaskAdapter but when I inject it comes null. I add @AndroidEntryPoint to adapter but it did not excepted because it is restricted by fragments, view model etc. How can I inject a class into an adapter? How do you find my approach here? class TaskAdapter : RecyclerView.Adapter() { } ... .. override fun onBindViewHolder(holder:...

Dynamically rename columns in room table using kotlin I have an application which loads a csv file with 4 fixed columns and 3 optional. I create tables in a room with 7 columns, where the last 3 have a name (atr1, atr2, atr3) and take a value of the String type. Is there a way to use Kotlin to rename these columns depending on the value in the csv file? Or is it possible to create 4 columns in the room and then add more depending on the columns in the csv file? Entity @Entity(tableName = "IND1") data class IND1( @PrimaryKey @ColumnInfo(name...

how to make a number line in android? I want to make something like below: A line with labels and dynamic pointer(based on input given).