How to show DropdownMenu as dialog Is it possible to show items in a DropdownMenu as a Dialog rather than a traditional Spinner? I noticed that the former is much better at handling and display a bigger set of items. Expected result Current code class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContent { MyAppTheme {...

Update data from one element in RecyclerView using ViewModel and LiveData I am trying to write an app using a variety of architectural components/concepts and are now at a point where I am not sure what the best/preferred solution to one of my problems is. I have a fragment inside the app that has a RecyclerView and displays elements from the Database in a List. Each item has a delete and an edit button. Now I have to implement those functionalities, but I am a bit at a loss on how to do this. I can either update the database and listen for changes there to update...

How may I fix android's databinding not recognizing some views contained in the xml file? I've recently cloned an old project and to my surprise 2 fragments had issues with data binding. 1. As you can see on the picture: Ive declared the binding variable(34), and initialized it accordingly(46). 2. As seen on this function, some views are not recognized and some are. The code works, the app compiles, but the IDE doesn't seem to...

audioManager not working on Android 11 and 12 I am making an internal calls application, when I call a number, the native android dialer opens and then instead of following the call in the native dialer, I follow the call in the app. The problem is that from the app it has no effect when I want to activate or deactivate the native dialer speaker. The native dialer is in the background, and the app is in the foreground, but for some reason when I try to activate the speaker from the app, to follow the call from here, it doesn't work. This...

Uneable to find TransformToGrayscaleOp class in android for transform to greyscale in android I want to transform my image to grayscale but when i traid to use TransformToGrayscaleOp class i got this error in the ide: Unresolved reference: TransformToGrayscaleOp Here's my code until now: val model = Modelo.newInstance(applicationContext) val imageProcessor: ImageProcessor = ImageProcessor.Builder()...

Nested beans with StaticTableSchema & enhanced DynamoDB client from AWS Java SDK 2.x How do I create a StaticTableSchema for a nested bean (like for the items property here)? data class Order( var id: Long = 0L, var items: List = emptyList(), … ) data class OrderLineItem( var id: Long = 0L, var price: BigDecimal = 0.0.toBigDecimal(), … )

What is a well recognized Android Development Bootcamp? I have been self teaching android development with kotlin for the last year. When looking through job postings I am seeing that many jobs ask for a degree, or a bootcamp. I see that there are many bootcamps when searching them, but after researching them, many seem to be scams based on reviews. Are there any that are typically viewed as more reputable than others? Any advice would be appreciated.

Making changes in Composable function when a value in another composable function changes I am trying to make a news app with a feature in which users can click on chips containing names of the countries to get headlines of that country (users can select multiple chips for getting headlines of the selected countries). I have created chips in separate composable function and want to keep track of boolean in mutableStateMapOf() so that when it changes I can send the currently selected countries (boolean value equal true) back to HomeScreen Composable where it can launch the effect...

OpenAPI Generator Kotlin Jackson I use the openapi generator kotlin module to generate kotlin classes from my openapi.yaml file. The process works fine until I try to deserialize the received JSON in my code to a kotlin class using Jackson. This is the generated class data class Request ( @field:JsonProperty("name") var name: kotlin.String, ) This is the error I get java.lang.IllegalArgumentException: Cannot construct instance of

...package.Request

(although at least one Creator exists): cannot deserialize from...

Get specific value from Coroutine after the fun is completed I'm a beginner in kotlin and I use coroutine for the first time in android. I want to get the value of classification after the async call is completed and transfer the result to the fragment, where this function exists in the non-activity class. I wrote the following function but it return an empty string with the first click of the button and return the value with the second click. Could you please help me? The calling in a fragment: runBlocking{...

Does it correct create viewModelscope.launch on every request? Kotlin Flow, coroutines i have code like this: class MyViewModel: ViewModel() { val myRepository = ExampleRepository() init { fetchServerRequest() } fun reload() { fetchServerRequest() } private fun fetchServerRequest(){ viewModelScope.launch { myRepository.fetchServerRequest() //repository returns Flow .collect { //handle result } } } And my question is: Repository returns cold Flow. Does it correct to create new coroutine c every time when i...

Testing Intent that will be triggered by an alarm I'm trying to set unit test for my android app. I have to test a notifications services that looks like that : This class provide function to set notification in a context class DeadlineNotification { companion object { private lateinit var alarmManager: AlarmManager private lateinit var pendingIntent: PendingIntent /* Create a notification channel for reminder notifications Creating an existing notification channel with its original values...

InflateException after changing textColor attribute in ExpandableListView I have a simple Kotlin class WarningFragment in which I set an adapter for ExpandableListView and pass list headers and details of every list header inside. For the record, here's the code of the class: class WarningFragment : Fragment() { private var _binding: FragmentWarningBinding? = null private val binding get() = _binding!! private val header: List = WarningData.warningData.keys.toList() private val body: List = WarningData.warningData.values.toList() override fun...

Trouble with subscribe to Observable in RxJava I have an issue where my program are not getting the result from Observable in subscribe() method. I'm trying to build simple console app that runs a request to the server and then prints to console the result. And as I see everything works fine but I just can't get the result in subsribe(). It seems like the app finishes before the result is returned to the method. Here is my code running the rquest: coffeeShopApi.getCoffeeShops("") .subscribeOn(Schedulers.io()) .subscribe({...

Using flow as the return type of an API call I am into kotlin and co-routines since last 8 months, as per my understanding it is not optimal usage of flow if we use it as the return type of an api call. e.g fun getCoutries():flow{ emit(apiInterface.getAllCountries()) } I am seeing usage of flow like these in one shot api calls, I want to know if this should be discouraged or not. Since flow is to be a stream rather than being one shot.

RecyclerView items aren't displayed I have configured a regular RecyclerView with ListAdapter and DiffUtil. But this time it isn't working. List of items is sucessfully received (which can be checked using Log.d in DriverDetailsFragment) and passed to RecyclerView adapter, but for some reason list isn't displayed. Fragment - DriverDetailsFragment class DriverDetailsFragment: Fragment() { private var _binding: FragmentDriverDetailsBinding? = null private val binding get() = _binding!! private lateinit var adapter:...

ClickableSpan AND onClickListener on TextView I need to have both on a TextView: When the TextView is clicked, trigger a function. But when a certain part of the text is clicked, trigger a different function. So I have a ClickableSpan for that certain part, and an OnTouchListener on the whole TextView: SpannableString string = new SpannableString(input); // ... string.setSpan(new ClickableSpan() { @Override public void onClick(View widget) { functionOne(); } }, start, i, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);...

How to save number from EditView in another integer in kotlin I'm pretty new to android so I will try to explain this the best way I can, so I have a EditView in an activity I created like this: and in my MainActivity.kt I save the number user input's like this: val number = findViewById(R.id.num) but when I try to sum the number user input's with a number I declared in my code like this: var summ = 1 summ += number When I launch program I says this: None of the following functions can be called with the arguments supplied: public final operator...

way to Reduce Memory and CPU Usage when create Zip I want to reduce Memory & CPU Usage My logic is get a s3Object from s3 and download local create zip file upload Zipfile on S3 Here is my code Is there any way to reduce Memory and CPU Usage....? //get a s3Object from s3 and download local fun downloadFile(keyList: List) { keyList.map { key -> val s3ObjectInputStream = getS3Object(key).objectContent val fileOutputStream = FileOutputStream(File(key.split("/")[1])) //I did change BufferSize but it was not...

How do I grey out an area outside of a polygon in MapBox for Android? I am currently using MapBox maps for Android v10.3.0. My app is written in Kotlin. Using the PolygonAnnotation, PolygonAnnotationManager, and...

Kotlin: How to get list of user installed apps? I want to list all those apps installed on the phone on RecyclerView. I am using the following code, but that only lists System Apps not any of the apps installed by the user. private fun loadApps() { val packages: List = mContext.packageManager.getInstalledApplications(PackageManager.GET_META_DATA) for (packageInfo in packages) { val newApp = AppInfo() newApp.setAppName(getApplicationLabelByPackageName(packageInfo.packageName))...

Cannot find 'Greeting' in scope Kotlin Multiplatform Moblie I've added a KMM module in my Android Studio project. My project builds successfully. I have added shared module in your dependencies of App level build.gradle.kts it looks like this :- implementation(project(":kotlinmultiplatformsharedmodule")) I am adding my project directory My project inside this directory

/Users/vmodi/AndroidStudioProjects/KotlinCocoapods

I created a xcode project and create a pod file...

How to add GestureDetector and ScaleGestureDetector on a ImageView with setOnTouchListener In my MainActivity i have: class MainActivity : AppCompatActivity() { lateinit var imageView: ImageView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val imageViewGestureDetector = GestureDetector( this, object : GestureDetector.SimpleOnGestureListener() { override fun onDoubleTap(e: MotionEvent?): Boolean { return true }...

How to dynamically add elements to a two column ListView on Android in Kotlin I'm new to android development in Kotlin. I would like to know how to implement a dynamic two column listView. Here is what I am trying to achieve: I should be able to dynamically add new elements by pressing the ADD button. The ADD button will open a dialog window where the user will fill out the info (description and price) of the new item. The listView should look like this: item price item price import android.os.Bundle import android.view.View import...

Returning Null When Logcat Shows Not Null trying to link fb with google auth on logcat it say not null but java.lang.NullPointerException at "Auth.currentUser " fun linkFb() { Auth.addAuthStateListener { if(Auth == null) { Log.d("auth","null") } else { Log.d("auth","not null") } } val accessToken: AccessToken? = AccessToken.getCurrentAccessToken() val credential = FacebookAuthProvider.getCredential(accessToken?.token.toString()) Auth.currentUser!!.linkWithCredential(credential) .addOnCompleteListener(this) { task -> if...

JAVA: Not supported FourCC: A.L.P.H. How to fix it? Can you help me to fix this erro saying ALPH not supported. there was a error for ICCP but I found a code snippet for this and add and error fixed but showing ALPH not supported. Can help me to fix this. Actually I am decoding encoding the animated webp file. public WebpChunk read() throws IOException { byte[] fcc = new byte[4]; if (read(fcc, 4) > 0) { if (isFourCc(fcc, 'V', 'P', '8', ' ')) return readVp8(); if (isFourCc(fcc, 'V', 'P',...

Kotlin - How to set block scope variables in flow My code looks something like this: private suspend fun decrementCount(): Boolean { ... var isGetCountSuccess: Boolean val isDecrementCountSuccess = decrementTapCountUseCase(_tapCounter.value) functionThatReturnsFlow().onEach { if (it in 0..1000) { _tapCounter.value = it } else { isGetCountSuccess = false // this doesn't work. how do I make this work? } } return isGetCountSuccess && isDecrementCountSuccess } the function that is used to return the Flow...

Kotlin Type Mismatch (interface is not resolved properly) I am using Ktorm and trying to create an abstract and generic DAO for my tables. In the end I get a type mismatch though and I don't see where I am wrong: BaseEntity is an interface for an entity class with an id: interface BaseEntity: Entity { val id: Int } User (the ORM class): interface User: BaseEntity IdTable (a table that has an int id as primary key): open class IdTable(tableName: String) : Table(tableName) { val id = int("id").primaryKey().bindTo { it.id } } Users (SQL...

Getting average values with Android Profiler in Android Studio I've been using android profiler to see how well my application performs on different devices and I was wondering if there's a way to automatically get average values such as average memory consumption in a set amount of time or for the entire duration of the profiling session. Peak values are easy to notice and mark down but an average would be very hard and time consuming to manually determine. I couldn't find any option that would allow me to easily get theses averages for me to make a...

Square Moshi casts Int to String if field type is wrong in response I'm trying to parse a JSON error body with structure { "code": 1, "message": "Some error message" } While writing tests for scenario where message is sent as Int, I expect the deserialization to fail. However, Moshi converts the Int type to String. Is this behaviour expected? Here's a failing test for the same: @Test fun `network error with wrong types should not be parsed`() { val errorResponseWithNoCode = """ { "message": 123 }...