Is there any good pattern for keeping track of the latest value of a DataStore preference without having to go via Flow and asynchronicity, for example for keeping track of a boolean value at various places without having to go through coroutines? Like observing all changes and updating a property which can be used in if/else in various parts of the code base? Code examples? Or is it a bad idea altogether?

Hello you all 🙋‍♂️, What do you think about this approach? On an Android project with a modularization per feature architecture, would you create a retrofit instance per each feature? Isn't this very costly? My friends and I are currently working on this kind of architecture, and we are in the stage of integrate the REST API. We are trying to isolate as much as we can every feature. But should we create a retrofit instance on each feature module that needs to call a service or should we have another module let's say "data" and handle all the retrofit thing there? What would you do?

If Fragment's

onStart

is always called (even when you've backgrounded the app and returned) what is its purpose? How do you do something only once after a fragment's view is created?

Hello everyone, I am facing one issue related to test cases. My Android project has more than 250 tests. Most of them include API mocking & some of them are unit tests. In Android Studio when I run the individual test class, all tests in that class succeed. But when I run the entire test package(altogether), some of the tests fail randomly. The project has the unit & espresso tests with

MockWebSerever

&

Awaitility

to handle API mocking & async operation. The

.gradle

file also has Android Orchestrator & clearPackageData declared. All the tests are independent. Still, the issue persists. Can someone help me to fix this issue? Please let me know if you need more details about tests & Android version.

Hello everyone, I’m having some issues trying to set a special autoSizing behaviour for a TextView. My font size is currently 26sp, I want my size to reduce down to 22sp at most to try to fit my text on 2 lines. But if even with 22sp, my text is too long, I want it to ignore the two lines restriction and stay at 22sp but on more than 2 lines. Is there any way to achieve this?

Hey guys, I've been overwhelmed by ContentProviders and FIleProviders and need some help. I have an image stored on the emulators SD card in the /Pictures direectory, the files path is like this

/storage/1018-2710/Pictures/Sarx7IIJi-o.jpg

, but when I try to share the image I get an error saying

Failed to find configured root that contains /storage/1018-2710/Pictures/Sarx7IIJi-o.jpg

. I have configured everything from the docs , but I cannot figure out which combination I need for my file-paths.xml file. I am currently using this

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="<http://schemas.android.com/apk/res/android>">
    <external-path name="external_files" path="/" />
</paths>

But this is the wrong location for the files I need. Basically, I am asking which one of these do I need to be able to access files from the MediaStore.Images ie /Pictures directory. Thank you! I tried googling and reading the docs but that got me to this point.

[SOLVED] Hello everyone. I am new to Android. I am facing an error 

A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution

 when using Room framework(may be library?). I make an application to practice 

Room

 , referring to this official course. I create

Entity

,

DAO

,

Database

,

Repository

,

ViewModel

and

Converter

to persist

Date

in SQLite. almost all things are done. but when I try to debug my application from Android Studio, I got this error

A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution

(please look at the attached image). If anyone else can help me, this repository on GitHub can reproduce this issue so please check it. Please tell me how to solve this problem. P.S this is more detail error description.

* What went wrong:
Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution
   > java.lang.reflect.InvocationTargetException (no error message)

I'm following the recommended Codelab for learning how to use Room, and they suggest copy and pasting this code.

// Annotates class to be a Room Database with a table (entity) of the Word class
@Database(entities = arrayOf(Word::class), version = 1, exportSchema = false)
public abstract class WordRoomDatabase : RoomDatabase() {

   abstract fun wordDao(): WordDao

   companion object {
        // Singleton prevents multiple instances of database opening at the
        // same time. 
        @Volatile
        private var INSTANCE: WordRoomDatabase? = null

        fun getDatabase(context: Context): WordRoomDatabase {
            val tempInstance = INSTANCE
            if (tempInstance != null) {
                return tempInstance
            }
            synchronized(this) {
                val instance = Room.databaseBuilder(
                        context.applicationContext,
                        WordRoomDatabase::class.java, 
                        "word_database"
                    ).build()
                INSTANCE = instance
                return instance
            }
        }
   }
}

The code contains a number of things I don't understand (

@Volatile

,

synchronized

), and Android Studio warns that

synchronized

is a Kotlin internal with no stability guarantees. Copying in something I don't understand which uses internal APIs I don't understand doesn't feel like a great idea. Is there an alternative?

Hi guys. I have a question, why my data will update and display on the RecyclerView in real-time even though my code does not consist of

observe()

to observe the ViewModel? I bit confuse.

Hey everyone. I’m using Jetpack Datastore proto models, how do I clear/remove a persisted datastore? E.g. removing user credentials on logout

I’ve tried changing the configuration, like so:

implementation(project(":ktaglib:lib", { "release" }))

But this doesn’t seem to resolve the problem

Hi I am trying to create a ViewPager with indicator tabs using AndroidCompose , can any one help

Does requesting for

ACCESS_FINE_LOCATION

and

ACCESS_COARSE_LOCATION

count as accessing

BACKGROUND_LOCATION

? I have an app which request both of those permissions for

Google Maps

and I am receiving warnings about

BACKGROUND_LOCATION

after uploading the apk in playstore. I don't used

FusedLocationService

in the app as well just the google maps itself so I'm really confused about the warning presented ng

Google Play

. Can anyone shed a light on this? Is there something I should be doing?

Am I the only one noticing that there is no longer a documentation for Kotlin Android Extensions on Kotlin's official site? Especially on how to configure

androidExtensions

block ?

Good evening everyone, I'm currently trying to migrate a legacy app using v4 support libraries to AndroidX and update AGP and Kotlin to 1.4 and I'm hitting a cryptic crash during runtime that I haven't been able to isolate or track down yet. Has anyone come across this before?

Hi all, trying to add multiple build environments to my project via env files (containing api base urls, secrets and such). Coming from Javascript and unsure how to do this in in Kotlin for an android project.

Hi folks, this is not really a Kotlin question but I hope you don’t mind. I am implementing a ViewModel for the first time as per https://developer.android.com/topic/libraries/architecture/viewmodel#implement Looking at the code example here (from above link):

class MyViewModel : ViewModel() {
    private val users: MutableLiveData<List<User>> by lazy {
        MutableLiveData().also {
            loadUsers()
        }
    }

    fun getUsers(): LiveData<List<User>> {
        return users
    }

    private fun loadUsers() {
        // Do an asynchronous operation to fetch users.
    }
}

It is not clear how

loadUsers()

could be implemented, as

MyViewModel

accepts no dependencies. In particular, if I want to instantiate MyViewModel like so:

val model: MyViewModel by viewModels { SavedStateViewModelFactory(this.application, this) }

it’s not clear to me how I could pass dependencies (like “MySomethingRepository”) to the view model

So more specifically, my question is, can I use

androidx.activity

function

viewModels()

and pass dependencies to e.g.

MyViewModel

?

Hello. What can I use to decode a .wav file (Frequency Shift Keying)? Aparently reading the bytes normally from the file is giving me around 2mln bytes which I don't think it's the right way to go. Did google a little but didn't find any good late tool. Any help?

Hi guys, can anyone help me to understand if is it safe to have kotlin

1.4.x

in some of dependencies (latest okhttp library for example) and

1.3.72

in the project and in some other dependencies too?

MainVM.png,mainActivity.png

Is it possible to get to this screen programmatically?? I found

val intent = Intent(Settings.ACTION_MANAGE_DEFAULT_APPS_SETTINGS)
startActivity(intent)

but the user still needs to click a few times and they probably don’t kno where. I want them to set it to always when they launch the app the first time

Hi guys, what is your view about Google-Oracle fight? Which are the consequences if Google loses?

Hey, I have a use case where I’d like to encrypt the output of

MediaMuxer

in memory before writing to disk. The general approach is: • Create a

MemoryFile

• Create a

CipherInputStream

from the `MemoryFile`’s

InputStream

• Give the `MemoryFile`’s

FileDescriptor

to the

MediaMuxer

constructor • Create a

FileOutputStream

from the

CipherInputStream

Right now I’m having to use reflection to get the file descriptor from

MemoryFile

and I’m curious why the getter is unsupported for app usage https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/os/MemoryFile.java#230.

This message was deleted.

Hello! I have a question about the SpeechRecognizer, and I don't know if anyone is familiar with it or has gone through the same problem. What I'm trying to do is that when pressing a button it starts recording, and when the button is released it stops recording. I have tried calling the

stopListening()

method as well as the

cancel()

method, but they are both ignored and nothing happens. I don't know if anyone has done this before, but I appreciate any help

This message was deleted.

Hi guys! Anyone know of a way to disable a click on the first position of the recyclerview? I got a recyclerview with implementation of onClickListener but I need to disable the click only for the first position, anyone know how to do it?

bit more jvm than kotlin really, but would have a million of instances of data classes bloat an apps memory size

I have a

ViewHolder

class which in charges of populating the data to the

quote_list.xml

. I create a

setOnClickListener

on the ViewHolder which would call a

QuoteFragment

that populated the relevant data into it. May I know how to populate the data from the

ViewHolder

to the

QuoteFragment

?

inner class QuoteViewHolder(private val bindingQuoteListBinding: QuoteListBinding) :
    RecyclerView.ViewHolder(bindingQuoteListBinding.root) {
    fun bind(quote: Quote) {
        // Assign data to the textview
        bindingQuoteListBinding.tvQuote.text = quote.quote
        bindingQuoteListBinding.tvAuthor.text = quote.author ?: "None"

        bindingQuoteListBinding.cardQuote.setOnClickListener {
            val activity = it.context as AppCompatActivity
            val fragment = QuoteFragment()
            fragment.show(activity.supportFragmentManager, "TAG")
        }
    }
}