Firestore collection data not displaying in recycler view but it is accessed correctly As described in the title, I have a firestore collection with two documents which I want to show in my recycler View. I can see in logs that data is accessed correctly and my recycler view adapter size also shows correct number but recycler view does not show up. I thought it might be due to me using view binding but I doubt that is the issue. I am out of ideas, any help is appreciated! This is my RecyclerView adapter: open class BoardItemsAdapter(private val context: Context, private val...

kotlin: assigning class data member create problem I have two kotlin file one is recycler_adapter(fragment) and another is fragment_B i want to send data to fragment_B. Problem: why tag4(inside getdata() function) not printing anything?. searched every possible querry but not find solution. Adapter(below) override fun onBindViewHolder(holder: dashboard_viewholder, position: Int) { val currentitem = sampledata[position] Glide.with(holder.itemView).load(currentitem.imageResource)...

Unit testing in Android fails when using .takeIf Kotlin function I am trying to run the unit tests suite on the application I am developing after initialising the FirebaseAnalytics but I get this IllegalStateException: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process null. Make sure to call FirebaseApp.initializeApp(Context) first. The initialising looks like this: firebaseAnalytics = Firebase.analytics.takeIf { shouldLogFirebaseEvents() } When not using .takeIf function: firebaseAnalytics = if...

Listing all the properties in a Kotlin class excluding the ones with custom getters Is there any simple way to list all the properties in a class excluding the ones with custom getters? For example in this case: class Person(val name: String, val age: Int) { val signature: String get() = "$name - $age" val uuid = UUID.randomUUID() } I would like to find: [ Person::name, Person::age, Person::uuid ].

Android Development - Autofill Phone Number not appearing, only showing 'Passwords' I am trying to utilize the Android's Autofill feature in an EditText field to give the user the suggestion of using the phone number associated with their device/account at the top of the keyboard (emulating iOS's autofill feature). I tried to add android:autofillHints="phone" and android:autofillHints="phoneNumber" into the xml file for the layout. Both of these options resulted in the left screenshot where this 'Passwords' button appears. (I also tested this code on an actual device instead...

How to get long click events on Android main thread with a delay using Kotlin Coroutines The solution that I have might not be elegant the way it is written using a Handler, but gives me the desired experience, where for a long click event as long as the button is pressed, some ui process should happen and that process should be delayed a little bit because the stream of events is fast, I want to do the similar experience using Kotlin's coroutine API. button.setOnLongClickListener { val handler = Handler(Looper.myLooper()!!) val runnable: Runnable = object :...

JetBrains exposed Adding a custom field/column with a value in a slice I want to add a custom field when doing a complex join with a value Basically something like this: SELECT p.first_name, "Smith" AS "last_name" FROM person p WHERE first_name = "John" In kotlin that would be something like this: PersonTable .slice(PersonTable.first_name, "" HERE IS WHERE I’D LIKE TO PUT SOMETHING "") .select(PersonTable.first_name eq "John") The field "last_name" doesn't exist in any table in this example. I want to add it to the ResultRow. My real query is much more...

not compile kotlin project with java file I have gradle plugin and android studio 4.2.1,gradle 7.02,java 8 and kotlin 1.5.0. When i try to compile kotlin project with java file,i get a compilation errors in task compileReleaseJavaWithJavac such as: error: package android.content does not exist import android.content.ContentUris; This errors exists not only for android.content package. I tryed clean and rebuild project,but it not works for me. Thanks everybody for any help.

Inject WorkManager with Hilt but getting error "Dagger does not support providing @AssistedInject types." While injecting WorkManager using HILT, compiler throwing below error "Dagger does not support providing @AssistedInject types" Have followed all mentioned steps from below link https://developer.android.com/training/dependency-injection/hilt-jetpack PFB Coding snippet and build.gradle dependencies for HILT and Worker WorkerClass <a href=""...

How to define OneToOne mappings with embedded ids with foreign key constraint on non-primary key field? I have the following tables: @Entity @Table(name = "villages") class VillageEntity( @EmbeddedId val id: VillageEntityId) { @Column(name = "map_id") val mapId: Int } @Embeddable data class VillageEntityId(@Column(name = "village_id") val villageId: Int, @Column(name = "gameworld_id") val gameworldId: UUID) : Serializable @Entity @Table(name = "map_cells") class MapCellEntity(...

FillMaxHeight, padding and wrapping content not behaving as expected in JetpackCompose I got into Jetpack compose and I am having a hard time finding examples of a normal screen. Everyone just uses scaffold and calls it a day. Using fillMaxSize is supposed to do exactly this, can someone explain how composable inherit their size? The topmost composable specifically (root composable)? @Composable fun MainContent() { Surface(modifier = Modifier.fillMaxSize()) { Column() { SearchBox() CurrentWeather() WindAndHumidityBox() }...

Resize FrameLayout does not show all children android I have a custom view that extends a FrameLayout and inside that i have some child views. The xml is like the following. As you can see at the beginning the ImageViews are "gone" (i have tried invisible also). Later, in some point i want to programmatically do 2 things I want to make the localPeerContainer width, height -> match_parent, match_parent I want to make the Imageviews visibility = View.VISIBLE ViewUtils.translationX(localPeerContainer, 0f)...

Any alternative for android studio? So the problem is my laptop is having problems keeping up with android studio. It runs extremely slow, so I want to know is there any alternative way to do android development in Kotlin with some other light weight IDE which has an emulator too for testing the app. For ex, can i use IntelliJ IDEA. If Yes, then please explain how to do it step by step, I'm a beginner. Thanks in advance.

Stubbing/Mocking the same suspended method twice (with different inputs each time), second time returns Null Pointer Exception (Kotlin) I am stubbing this specific suspended function twice with mockitokotlin2 in my test file requestClientTest.kt (I would use mockk but my team is currently not going to update our gradle and kotlin). The first time I do it, it works perfectly. However, the second time I stub it, it returns a NPE This is the first time i stub it (in requestClientTest.kt). executeRequestAsync is called through the function executeToken, located in requestClient.kt . This seems stubbed correctly. The only thing...

How do I overload Kotlin's string template operator (the dollar symbol)? I'm sure I've read that Kotlin's "dollar operator" for string templates can be redefined, but their documentation on operator overloading does not indicate how to overload it, and their documentation on string templates, like most online tutorials on string templates, tell you merely how to...

Kotlin vs Java for Android apps [closed] I am about to start writing Android apps. Background is in VB, tried B4A but wasn't for me. I started learning Java, but now it looks like there is a big push to make Kotlin the main Android development language. Pretty much every article I read lists Kotlin as superior. So I'm trying to decide if I should keep going with Java or switch now before I get too far in.

Hilt Unsupported metadata version in Kotlin 1.5.0 I was tried to run my code in kotlin 1.5.10 with a very simple Dagger code as below class MainActivity : AppCompatActivity() { @Inject lateinit var info : Info init { DaggerMagicBox.create().poke(this) } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } } class Info @Inject constructor() { val text = "Hello Dagger 2" } @Component interface MagicBox { fun...

How can I get a variable without creating a new instance Kotlin I'm learning Kotlin and I face some problems. I want to get a variable from another class but when I call it, there is a new instance of the class who have the variable. In Java, we're doing this class Main { public static void main(String[] args) { SomeText.text = "another text"; System.out.println(SomeText.text); } } class SomeText { public static String text = "My Text"; } And the result is "another text". But in Kotlin if I'm using this : fun main(args:...

ListView show item only after refresh I started to learn android and one time I faced with problem like it: In my fragment I have editText and ListView. I set standard adapter with ArraList data and saw that ListView show items only after I call the keyboard tapping on editText. I tried to find any information about it on many programming websites but I faced failure. What kind of problem I have? My .xml file: My fragment file: override fun onCreateView( inflater:...

How partially cut the paper in EPSON TM-T88IV printer using java/kotlin I'm following this document. In that document the value for the partially cut is the following. fun finit(): String { val FeedAndCut = byteArrayOf(29, 'V'.toByte(), 66, 0) var s = String(FeedAndCut) val DrawerKick = byteArrayOf(27, 70, 0, 60, 120) s += String(DrawerKick) commandSet += s return s } complete code can be found on the...

Understanding how work with flexible in-app updates I'm trying to implement in-app updates in my application but I'm facing a doubt about how to work with flexible updates. I will show the flexible update to the user in the splash screen when the user open the application, what I need to do before this? Can the user navigate on the application or I need to force the user to keeps on the splash screen until the update are done? My doubt about this it's because of the snackbar that I want to show to her when the update are done, notifying the...

How do I pass data from Service to Activity? Beginner warning although CS student I have a Service named RestApiService and an activity named MainActivity. I have a token which I got stored in RestApiService. In link is screenshot of the RestApiService in imgur https://imgur.com/a/Msu04xj How do I get it from there to MainActivity? TIA

Kotlin BuildType 'XYZ': id 'XYZ' is already used in BuildType(uuid='', id='XYZ', name='Deploy to envr') error I was trying to refactor my Kotlin file that contains the configuration for a TeamCity pipeline. However, I keep getting the following error: BuildType 'KotlinExperiments_DeployToEnvironment': id 'KotlinExperiments_DeployToEnvironment' is already used in BuildType(uuid='', id='KotlinExperiments_DeployToEnvironment', name='Deploy to test') I tried to <a...

AsyncHttpClient Kotlin ConnectTimeoutException I am buiding an Android app in Kotlin. At some part of the app, I have to fetch data from an API endpoint served in a GCP instance using AsyncHttpClient from loopj. The problem here is that the request is sometimes succesful and and sometimes it returns a ConnectTimeoutException with an error message Connect to .bc.googleusercontent.com/ timed out. However, this problem never occurs when using Python requests. What is likely to be the problem? Is there something I am missing? Thank you....

Fast I/O in Kotlin Kotlin for competitive programming suggests the following code for reading console input. readLine()!!.split(" ").map{ str -> str.toInt() } //read space separated Integer from console Until now for every competitive problem I've used the same approach and to be honest, it has never disappointed. But for certain problems where the count of input integers is very large (close to 2 * 10^6) this...

Flow with Retrofit giving error Unable to create call adapter for class java.lang.Object error can anyone help me with this? My API looks like interface BoredAPI { @GET("api/activity") suspend fun getBored(): Bored } Repository class is like class BoredRepositoryImpl @Inject constructor( private val boredAPI: BoredAPI) : BoredRepository { override fun getBored(): Flow { return flow { emit(boredAPI.getBored()) }.flowOn(Dispatchers.IO) } } I am getting "Unable to create a call adapter for class java.lang.Object" error.

How to read a local file android kotlin I do have a basic setup to open a file. val myfileIntent: Intent myfileIntent = Intent(Intent.ACTION_GET_CONTENT) myfileIntent.setType("*/*") startActivityForResult(myfileIntent,10) override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if(requestCode==10){ if(resultCode== RESULT_OK){ val path: String? = data?.getData()?.getPath() println("Path is :...

Can I able to store my SQLite database in any cloud storage/online database? I have previously worked with the background threads and web services to manipulate/fetch the data to any online database/cloud storage. But I would like to know that is there any posibilities where I can store my SQLite database(offline database) to any online database/cloud storage? Any links of article or tutorial would be helpful for me. Thank you.

How to crop image using kotlin but the image shoud get imageview not gallery I am a beginner in kotlin, I have tried it using a bitmap, but it's not working

How to download Instagram videos using its link in Android (Kotlin)? I want to make an Android app in which I can paste the Instagram link and download the video. (kotlin) Please guide