kotlinlang #stackoverflow

Custom Notification is not displayed on android 12 I have a problem with my notification code, in my device with Android 9 It works good but not in Android 12. I notice that maybe It's something related to the RemoteViews but I'm not sure. This is my code: object NotificationUtils { private fun createNotification(context: Context, activity: Activity, layout: Int, channelId: String ): Notification { return NotificationCompat.Builder(context, channelId) .setCustomContentView(RemoteViews(activity.packageName, layout))...

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07/18/2022, 8:41 PM

Gradle Issues in Android Studio I'm new to Android development with Kotlin. In the course I'm currently taking, there's a Java file I'm meant to convert to Kotlin. I'm stuck with this Gradle problem and can't find my way around. I have no prior Java experience. What can I do to resolve this issue?

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07/18/2022, 8:41 PM

Upsert query in Dao I am developing an application using Room. The operation is simple, if the table has the same letter, the letterscore will increase by 1, otherwise it will be added and letterscore will be 0. In my Dao, I wrote a query as below to upsert the data, but it gives compound operator>, LIMIT, ORDER, comma or semicolon expected, got 'ON' error in the "ON" part: @Dao interface LetterDao { @Query("INSERT INTO letter_table(letter, letterScore) VALUES (:letter, :letterScore) ON CONFLICT(letter)...

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07/18/2022, 9:01 PM

LazyColumn Acknowledging Key inside another Column? basically I have a giant Lazy Column, but I only want some components inside another component to launch the animation when that child component is visible. I am having so much trouble with the keys, I want to put a key ONLY on a certain composable within the LazyColumn. My issue is that the 'isItemWithKeyInView' is TRUE once the entire Column is showing, so the user is not able to see the animation since its not on the screen yet, but the same Column is visible. I tried putting a...

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07/18/2022, 9:21 PM

Use DI ( Dagger 2/Hilt ) at runtime without broke MVVM pattern? suppose i need to let user login at runtime using MVVM and DI patterns and i have Repository that have function to make login class RepositoryLogin @Inject constructor() { fun login(login: Login){ ... } } Now we need ViewModel that pass this Login object to our Repository at runtime, here is some of my solution: Use @AssistedInject to construct ViewModel at runtime with parameters and call "login" function that creates inside in viewModel an istance of Login class. But in...

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07/18/2022, 10:01 PM

Jackson kotlin inheritance deserialize problem I am using jackson-module-kotlin:2.13.3 and retrofit2:converter-jackson:2.7.2 in android project. I have a field 'status' that I receive and from it I understand which class to convert further, but the problem is that in descendant classes it becomes null. Main code is in Test.kt below. ResponseSuccessAbstract.kt: @JsonTypeInfo( use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "status") @JsonSubTypes( JsonSubTypes.Type(value =...

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07/18/2022, 10:21 PM

Why documentt.data.getValue() gives empty string? Please help my to get a value from Firestore I have a Firestore database where "adminData" collection but only single value is essential. I will like to retrieve it from the firebase database and store it in string. Can you please help me with the implementation in android studio using Kotlin? val myString : StringBuffer = StringBuffer() var db = FirebaseFirestore.getInstance() db.collection("adminData").get() .addOnCompleteListener { it -> if(it.isSuccessful) {...

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07/18/2022, 10:21 PM

Change background color of fragments dynamically from a switch I am trying to have all fragments change to the background color of red using a SwitchPreferenceCompat but am having trouble writing the listener code and MainActivity code. I have tried some things but am not too familiar with how to write the listener code to be able to write the mainactivity code to use it properly. I am not really looking for a solution but rather being pointed in the right direction. Thank you Here's the relevant code: Preferences xml...

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07/18/2022, 11:01 PM

What is the complexity of the groupingBy{ it }.eachCount() operation? What is the time-complexity of the groupingBy{ it }.eachCount() operation? fun main() { val a = listOf(1, 1, 3, 3, 3, 5, 8, 8) val counter = a.groupingBy { it }.eachCount() println(counter) } Here is the source code for both functions: public actual fun Grouping.eachCount(): Map = foldTo(destination = mutableMapOf(), initialValueSelector = { _, _ -> kotlin.jvm.internal.Ref.IntRef() }, operation = { _, acc, _ -> acc.apply { element += 1 } })...

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07/18/2022, 11:21 PM

Class 'ListHerbalAdapter' is not abstract and does not implement base class member public abstract fun getItemCount `class ListHerbalAdapter(private val listHerbal: ArrayList) : RecyclerView.Adapter() { var onItemClick : ((Herbal) -> Unit)? = null override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ListViewHolder { val view: View = LayoutInflater.from(parent.context).inflate(R.layout.item_row_herbal, parent, false) return ListViewHolder(view) } override fun onBindViewHolder(holder: ListViewHolder, position: Int) { val herbal = listHerbal[position]...

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07/19/2022, 2:41 AM

How to port ScrollView written in kotlin to flutter The question is difficult to understand due to machine translation. Sorry. Scrolling view with scaling and panning in Kotlin. I would like to port this to flutter, but GestureLisner is not working and I don't know how to solve it. The XML Layout itself is displayed, but the GestureLisner for scaling and panning is not detected. Can anyone help me with a solution? Below is the code created in Kotlin. We are aiming to port this. class MainActivity : AppCompatActivity() { private lateinit var...

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07/19/2022, 3:41 AM

how to start app on boot in android tv box I have an application on android tv box and I want to start this app when TV start or this android box connects to TV. and also I work in flutter but this app is only on Android. I add this to AndroidManifest.xml: and this is BootReciever package com.example.app import android.content.BroadcastReceiver import android.content.Context; import android.content.Intent; import com.example.insoft_web.MainActivity class BootReciever:...

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07/19/2022, 5:21 AM

How to integrate google pay payment gateway in kotlin android project, anybody help pls In my kotlin existing project, how to integrate google pay app when i click pay now button. When i click pay now option, app should check whether gpay app installed or not and if installed means through gpay app payment can be done.

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07/19/2022, 5:21 AM

Callback returns a null arraylist when getting data from firestore I have created a callback function to get the arraylist of conversations when the task is completed. It gets all the data and adds it to the list but still, it returns null. Is there a way to fix this issue? fetch conversations method: private fun fetchConversations(fetchConversationsCallback: FetchConversationsCallback) { db.collection("rooms") .addSnapshotListener { value, error -> if (error != null) { Log.d(TAG, "Get failed with ",...

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07/19/2022, 5:41 AM

Kotlin - Achieving Executors.newSingleThreadExecutor behaviour using coroutines Executors.newSingleThreadExecutor queues the tasks registered to it and then executes them sequentially. The following code: val singleThreadedExecutor = Executors.newSingleThreadExecutor() (0..10).forEach { i -> singleThreadedExecutor.execute { if (i % 2 == 0) { Thread.sleep(2000) } else { Thread.sleep(1000) } println(i) } } outputs this: I/System.out: 0 I/System.out: 1 I/System.out: 2 I/System.out: 3 I/System.out: 4...

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07/19/2022, 5:41 AM

Android - Listen for keys on the broadcast receiver I want to know how to listen for keys (like f1, f2, etc) on the broadcast receiver? Note: I have a USB broadcast receiver. I want to listen for keys on it.

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07/19/2022, 5:41 AM

How to share specific event linke we share video and use click on the link and go to that video I want to share a specific link we share a video and click on the link and go to that video. I use the firebase dynamic link. And I achieve the image format by the below code, I want for the video, I didn't get the documentation for the video. Anyone knows about it Share the knowledge Firebase.dynamicLinks.shortLinkAsync(ShortDynamicLink.Suffix.SHORT) { link = deepLink domainUriPrefix = "https://xxxxx.xxx.xxxx" socialMetaTagParameters { title = "yyyyyyy"...

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07/19/2022, 6:01 AM

How to truncate csv file to n of rows not reading the whole file I have big csv(12 gb), so I can't read it in memory, and I need only 100 rows of them and save it back(truncate). Has java such api?

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07/19/2022, 6:01 AM

How to Get Data From Firebase Dynamic Link I have Make Google Map Integration Of My Application. Then Implement the firebase dynamic link when user and driver both location driection show on map then share the dynamic url and just click show in app also get data in log in string format. how to get string format data access from one variable which i store in project

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07/19/2022, 6:01 AM

Android MaterialCardView's drop shadow/elevation disappears when rotating it 180 degrees Summarize the problem: I am working on a paint app, and in this app, the user has the option to rotate the canvas, this feature can be useful in some scenarios. The problem I am having, is that when I rotate the CardView, which hosts the canvas/bitmap, 180 degrees -- the drop shadow gets lost. I do not get this problem when I rotate the CardView 90 degrees, only 180 degrees. Describe what you've tried I've tried many things, such as giving the CardView more space so that the drop shadow will...

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07/19/2022, 7:21 AM

How to create combine title and menu list in one box (drop down ) in jetpack compose? I have created a drop down menu using jetpack compose. here used card for the menu title. I just want to combine title box of drop down and body box of drop down using jetpack compose. Dropdown menu

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07/19/2022, 7:21 AM

Android - How to set a key shortcut for app programmatically I want when F1 has pressed on the phone my app opens. Is there any way to programmatically set the F1 key shortcut for opening my app on android?

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07/19/2022, 7:41 AM

How to configure Kotlin for tests in Android Studio I just started using Kotlin in my Android project. The project compiles and runs. But when I try to convert an instrumented test file from Java to Kotlin i get the dialog "Kotlin is not configured in the project. You will have to configure Kotlin in project before performing a conversion." Here is my build.gradle file import com.android.ddmlib.IDevice import com.android.ddmlib.NullOutputReceiver apply plugin: 'com.android.application' apply plugin: 'kotlin-android' //...

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07/19/2022, 7:41 AM

Problem with ViewModelFactory in Android Studio I am trying to create a ViewModel Factory with the below code: class TestViewModelFactory(private val testId: UUID) : ViewModelProvider.Factory { override fun create(modelClass: Class): T { return TestViewModel(testId) as T } } However, against the class definition, there is a compilation error saying: Inheritance from an interface with '@JvmDefault' members is only allowed with -Xjvm-default option Can someone help me with what this problem is about?

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07/19/2022, 8:21 AM

Cursor goes to start(left) of the EditText after a character is entered or deleted everything works as it should except the problem is that the cursor just goes to the start after a character is deleted or inputted, i want to it to stay at the same position This is the code: binding.includeFirstSeekbar.seekBar.setOnSeekBarChangeListener(object : OnSeekBarChangeListener { override fun onProgressChanged(seekBar: SeekBar, progress: Int, b: Boolean) { val number = java.lang.Double.valueOf(progress.toString())/100 val dec =...

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07/19/2022, 8:21 AM

null result variables in fragment android kotlin I´m traying to send variables to my fragment in android with kotlin. My problem it´s when i load my fragment this values it´s null. Im sending my data so: if (jsonObject != null) { val dataJson: JSONObject = jsonObject.getJSONObject("user") val name = dataJson.getString("name") val address = dataJson.getString("address") val email = dataJson.getString("email") val phone =...

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07/19/2022, 8:21 AM

Writing a unit test for a function in Kotlin I am new to writing Unit tests. I have a function that takes as input an Android Package name, and outputs the SHA-256 digest for that package. Here it is: fun getSignatureByteArray(packageInfo: PackageInfo): ByteArray { var outputDigestByteArray: ByteArray = byteArrayOf() val signature = packageInfo.signingInfo.apkContentsSigners[0] val digest = MessageDigest.getInstance("SHA256").apply { signature.toByteArray() }.digest() val intermediateString =...

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07/19/2022, 8:21 AM

Get kotlin class failed with dynamic string but works with constant I just call a method class through this line : val instance = Class.forName(nameClass).kotlin.objectInstance When I set the nameClass with a constant value (see below) it's work. private const val PROVIDER_CLASS = "com.abc.xyz.feature.DynamicFeatureImpl\$Provider" fun method() { val instance = Class.forName(PROVIDER_CLASS).kotlin.objectInstance } But, when I set the nameClass to string (not constant), like this fun method() { val nameClass =...

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07/19/2022, 9:01 AM

Verifying signature from .ps7 file (PKCS#7/CMS) in Kotlin I have a file fileA.json.p7s and I'm trying to validate the detached signature using Bouncy Castle. However, the code fails on verification and returns the error: org.bouncycastle.cms.CMSSignerDigestMismatchException: message-digest attribute value does not match calculated value Does anyone know how to fix this error? Here is my code: fun verifySignature(): Boolean { val signatureContent = File("src/test/resources/fileA.json.p7s").readBytes() val cmsSignedData...

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07/19/2022, 9:01 AM

Intellij - running a project after java upgrade fails I have a project with 3 modules. I am running them with Intellij. Everything worked fine until project was upgraded to java 17, I ran following commands in terminal: sdk install java 17.0.3-tem sdk use java 17.0.3-tem In Intellij preferences Compiler -> Java Compiler -> Project bytcode version is set to 17 as well as all per module bytecode target versions. I have tried to use both javac and eclipse compiler, also I have set the Gradle Jvm to temurin-17 in Intellij Build Tools -> Gradle, but...

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07/19/2022, 9:01 AM

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