java.io.IOException: at androidx.datastore.core.SingleProcessDataStore.writeData$datastore_core (SingleProcessDataStore.kt:303) at androidx.datastore.core.SingleProcessDataStore.transformAndWrite (SingleProcessDataStore.kt:280) at androidx.datastore.core.SingleProcessDataStore$actor$1.invokeSuspend (SingleProcessDataStore.kt:165) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith (ContinuationImpl.kt:33) at kotlinx.coroutines.DispatchedTask.run (DispatchedTask.kt:106) at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely (CoroutineScheduler.kt:571) at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask (CoroutineScheduler.kt:738) at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker (CoroutineScheduler.kt:678) at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run (CoroutineScheduler.kt:665)

When using experimental APIs that require

@ExperimentalSomethingApi

or

@OptIn("some experimental option')

there is an issue. When such APIs become stable and these annotations are no longer required, then nothing indicates that the annotations are obsolete! Is there a way to detect this, other than manually trying to delete the annotation and seeing what happens?

Help! I have lost the release key which I used to sign apk builds in Android Studio. Can I get/extract that release Key info from apk? I have already tried to make a new key with almost the same info but the time/validity info is unable to match. And now I am unable to install the update on the apk already installed version on mobile.

Hello everyone. I've just open-sourced a project that I've been working on for quite some time called Gamedge. The aim is to showcase the latest trends in Android development by utilizing the best practices, libraries, and tools to develop a fully-fledged Android application. If anyone want to take a look, here's a link to the GitHub.

Hi guys Is it possible and if it is how much effort it might take to create a simulator for 3rd-party non-mobile custom device, which is to be run on android phone? Maybe there are some tools/solutions which might help implementing this, or is this an absolutely uncommon task?

@Emiliano Schiavone for a homework assignment?

Hi guys, I have a question about sealed class. What is different between these: 1. first approach:

sealed *class* Expr

data *class* Const(*val* number: *Double*) : Expr()

data *class* Sum(*val* e1: Expr, *val* e2: Expr) : Expr()

2. second approach:

sealed *class* Expr {

data *class* Const(*val* number: *Double*) : Expr()

data *class* Sum(*val* e1: Expr, *val* e2: Expr) : Expr()

}

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Calling all Android educators!

Hello everyone Is it possible to integrate PayPal with Android natively And without using Braintree ?

Hello everyone! RX has

testScheduler

and it has

triggerActions()

. Is there any analogue in coroutines? I’m looking for an analogue in runBlockingTest, but this has an experimental API.

Interested to see thoughts around using a custom DSL for implementing the UI test robot pattern. Basically, in liu of a java-esqe Builder like ScreenRobot().userName("user").password("pass").build() you could instead define a structure

robotTest {
   screenRobot{
     precondiitons{
       userName = "user"
       password = "pass"
     }
     verify{
       errorisShown()
     }
   }
}

Hi everyone 👋 , I was curious in how R8 creates the directory for the mapping.txt file. The official docs state that R8 saves the file in the

<module-name>/build/outputs/mapping/<build-type>/

directory. However, I think R8 saves the file in the

<module-name>/build/outputs/mapping/<build-variant>/

directory. I could be wrong about this, but would appreciate if someone can confirm this. Thanks!

I am getting this error when trying to launch the emulator

The emulator process for AVD Pixel_2_API_27_Phone_ was killed.

Does anyone know what could be causing this issue?

hi. I want to learn programming on smartwatches with wear os. Could you recommend me some relatively cheap smartwatch with wear os that i could buy in europe? Can you recommend some tutorial which will be good on start? I have experience in programming on Android (kotlin,Java) and iOS/Android (React-Native), so technologies are not limitation for me.

hello, does anyone knows how i can make the user change his picture by pressing on an imageButton without using firebase or so? And is there a way to save the image using shared preferences?

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If you want to learn Android app development with Kotlin, you can check out our new book. It is available now on Packt (https://www.packtpub.com/product/how-to-build-android-apps-with-kotlin/9781838984113) and on Amazon (https://amzn.to/3rlmn4B)

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When I add "var applicationDate = (clubEvent.startParticipationDate.toString(DateTimeFormat.forPattern("' 'dd-MM-yyyy' 'HH🇲🇲ss' '")))" to my app, whenever I go to that page in the app, the app crashes.

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I’m using androidX DataStore but i get the error of mutiple instance because i’m creating an instance of my preference class in all fragment and activity. How can i stop this error by reducing the number of instances. ?

Quick question: what benefits does Android Studio provide over IntelliJ for Android development? Am I correct in saying that they are both practically the same?

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why i am not able to use this now, it navigates as expected but it is not a valid generated class now by safe args, I cannot use any methods nor any suggestions ? Tried rebuilding, invalidating. This is main navigation graph which has nested graphs and global actions which I am trying to call in the below SS.

Hello Guys, I have been using data binding with Viewmodel + live data. I have seen examples to update the Ui with Livedata<UiState<ModelClass>> using databinding is via writting BindingAdapters but i have also read that binding adapter are not good as they hide the logic behind itself. I am interested to know what are the other option to do the same?

Complete Noob question:

MutableMap<K,V>

or

HashMap<K,V>

as the type for a dictionary plan on updating over time? Or some other even newer and improved variant I'm not aware of yet? And is

hashMapOf()

the best way to initialize an empty one?

Heya 👋🏻 I started to write a series of blogs talking about how to organize the business requirements, how to choose the right software architecture and presentation pattern for your app, how to organize your work, and more. Check the blow tweet to know more 🤜🏻🤛🏻 https://twitter.com/ahmedadeltito/status/1371923279506763777?s=19