But I am getting this:``` None of the following functions can be called with the arguments supplied: @InlineOnly public inline fun print(message: Any?): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Boolean): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Byte): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Char): Unit defined in kotlin.io @InlineOnly public inline fun print(message: CharArray): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Double): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Float): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Int): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Long): Unit defined in kotlin.io @InlineOnly public inline fun print(message: Short): Unit defined in kotlin.io

Task :app:buildInfoGeneratorDebug```

Hi I was curious, Couroutines Vs RxJava ? Which one is more suitable in your opinion ? For me it's Rx mainly because I have more experience with it, but what do you guys think ?

I'd love to know if anyone has explored the Unidirectional Data Flow for Android? I took a unique approach implementing it with LiveData + Kotlin as opposed to RxJava. A few major Kotlin benefits with this pattern are the

Sealed class

and the shallow

.copy(..)

function. I'd love any feedback on this new approach! 🙂 🤖 Medium - https://hackernoon.com/android-unidirectional-flow-with-livedata-bf24119e747 YouTube -

Afternoon everyone! I currently have a C# Android application out in the app store. I'm looking to rewrite app in Kotlin. How hard is it to swap an app artifact out and make sure the id/purchase id's and all that match?

Hello! is it possible to use

kotlin-android-extensions

for

@Parcelize

but not for views?

is it safe to exclude

.kotlin_module

files when build release apk?

Anyone have any links/resources for Android XML style guides?

I’m just now using coroutines in Android more exclusively. I build a library that takes care of analytics for a suite of apps. The public functions on that library are

suspend

functions. If I want to log, say, which screen the user opened then I’ll want to call one of those

suspend

functions from the library. However, if I’m calling from

onCreate

in an

Activity

, what coroutine scope do I want to use? I want the analytics to get recorded and not canceled if the

Activity

is destroyed.

Dear All, I want to build an instagram like stories feature. Any help / resources will be helpful. 🙏 TIA

Hello, how would I get "url" out of Json like this with kotlin:``` { "meta": { "status": 200 }, "response": { "hits": [ { "highlights": [], "index": "song", "type": "song", "result": { "url": "https://genius.com/Lucidious-changes-lyrics",```

@jw I still facing the below issue after updating kotlin version to 1.3.40. public abstract fun writeToParcel(p0: Parcel!, p1: Int): Unit defined in android.os.Parcelable. Still I need to stick with androidExtensions { * experimental = true* * }* . Please clarify.

Hi boys... any suggestions for Android Studio Git (Bitbucket) Plugin with pull-requests fnct?

This message was deleted.

Anyone happen to know if Retrofit 2.6.0 uses Dispatchers.IO by default with coroutines?

Would a

Contract

for deprecation be a good idea? Take

Html.fromHtml

for example, even though we have

HtmlCompat

we wont have to go and create a

XxxCompat

for everyone if something like this was possible. Consider this snippet:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                Html.fromHtml(contactToDisplay, Html.FROM_HTML_MODE_LEGACY)
            } else {
                @Suppress("DEPRECATION") // maybe we can do something to avoid this? 
                Html.fromHtml(contactToDisplay)
            }

If we could wrap this in a contract maybe, plus android SDKs mostly have when a particular api was deprecated, even though below a particular SDK level, it was completely fine using it. Also, looking at a bigger picture we could maybe not just use primal checks like

implies x != null

there could be some other annotation with retention policy of runtime or something and maybe we could do

implies x is NotDeprecated::class.java

or something. Just a thought.

Tried something like this

Mockito.when(view.hideKeyboard()).then(doNothing())

Hi guys, I'm studying android + kotlin in google Udacity course and in the course say that for performance improvement we shouldn't use a lot findViewById when you can store the view in a field. My question is, AndroidX adds a way better to get views just putting the name of it and using, internally this property calls findViewById ? I should store this view too using AndroidX ?

I'm using this data class to store the form data

data class FormData(
    private var _email: String = "",
    private var _password: String = "",
    private var _isAllFieldsValid: Boolean = false
) : BaseObservable() {
    var email: String
        @Bindable get() = _email
        set(value) {
            _email = value
            notifyPropertyChanged(BR.email)
        }

    var password: String
        @Bindable get() = _password
        set(value) {
            _password = value
            notifyPropertyChanged(BR.password)
        }

    // I want this function to be notifed for both email and password changes
    fun onValuesChanged() {
        
    }
}

Is there any way to achieve this rather than callback or observer?

I wanna start to learn Rx reactive programming I know some concepts but didn't use it before 1- Could u please someone recommend me something to learn? 2- someone told me that I have to learn it in java first, is it true? 3- also in kotlin i see rxkotlin, coroutines, rxAndroid, I don't know what is preferred? thanks in advance ♥️

Did anyone play around with compose? The documentation said something about a live preview but I can‘t find any :/

Moreover, Kotlin's concept of suspending function provides a safer and less error-prone abstraction for asynchronous operations than futures and promises. Could someone explain why this is true?

I have confuse when using lifecycleScope in fragment, why the fragment’s context is null inside lifecycleScope? I also asked this on stackoverflow, here is the link: https://stackoverflow.com/questions/56415530/why-the-fragments-context-null-inside-lifecyclescope

This message was deleted.

Lately we’ve been wrapping callback into Coroutines for libraries that specifically need callbacks to function and offer no Coroutines nor Rx connectors. The snippet we’re using to achieve that comes from kotlinlang forums, some of you may recognize it.

suspend fun <T> awaitCallback (block: (Callback<T>) -> Unit) : T =
    suspendCancellableCoroutine { continuation ->
        block(object : Callback<T> {
            override fun onComplete(result: T) {
                if (continuation.isActive) {
                    continuation.resume(result)
                } else {
                    ...
                }
            }
        })
    }

I admit I’m not fully mastering that snippet (could be arguable to use it in our codebase) but it’s allowing us to get rid of callbacks when there’s no alternatives. We’re using it with firebase iirc. It’s working well, however we have a lot of trouble covering that particular snippet of code using Unit Tests. We’re using Mockito/Powermockito and seting up the unit test with this code :

@Captor
private lateinit var callbackCaptor: ArgumentCaptor<Callback<Any>>

@Mock
private lateinit var lambdaReceiver: (Callback<Any>) -> Unit

Anybody do have tips to cover that the above method using Mockito/Powermockito ?

Hello! I'm wondering if anybody knows of a simple way to avoid

data class

duplication when using room. I have a

data class

from a custom library (Kotlin but NOT Android). I have an Android app that uses that library and will store some items of that

data class

. But as far as I can see, I don't find an easy way to create an

entity

from that library

data class

. Any ideas?

Hello there, we are facing a problem with ROOM DB it says the newly added column is not found, room library version is 2.1.0, the app crashes, we have handled adding of the column in the migration, the migration seems to be successfull since the user can use other parts of the app, but when the tables where a new column is added it crashes saying, Not all users are facing this problem only 10% of users are having this problem, and mainly on Samsung s9 with Android 9 facing more. This was the old table CREATE TABLE “pfile” (“id” INTEGER PRIMARY KEY NOT NULL ,“name” VARCHAR,“lname” VARCHAR,“rlhip” VARCHAR,“sex” VARCHAR,“wk” VARCHAR,“un” VARCHAR,“fun” VARCHAR,“pn” BOOL NOT NULL DEFAULT (1) ,“dd” DOUBLE,“add” DOUBLE,“ph” BLOB,“hk” BOOL,“th” VARCHAR,“fun” VARCHAR, “swk” VARCHAR) Changed to the below( data type of some columns changed and tun column is added) “CREATE TABLE pfile_new (id INTEGER PRIMARY KEY NOT NULL ,name TEXT, lname TEXT, ” + “rlhip TEXT, sex TEXT, wk TEXT, un TEXT, lun TEXT, ” + “pn INTEGER NOT NULL, ” + “dd REAL, pdd REAL, ph BLOB, hk INTEGER, th TEXT, fun TEXT, swk TEXT, tun TEXT)” This is the code in the migrate function database.execSQL(“”CREATE TABLE pfile_new (id INTEGER PRIMARY KEY NOT NULL ,name TEXT, lname TEXT, ” + “rlhip TEXT, sex TEXT, wk TEXT, un TEXT, lun TEXT, ” + “pn INTEGER NOT NULL, ” + “dd REAL, pdd REAL, ph BLOB, hk INTEGER, th TEXT, fun TEXT, swk TEXT, tun TEXT)” ) database.execSQL(“INSERT INTO pfile_new (id, name, lname, rlhip, sex, wk,un,lun,on,dd,pdd,ph,hk,th,fun,swk) ” + “SELECT id, name, name, rlhip, sex, wk,lun, pn,dd,pdd,ph,hk,theme, fun +swk ” + “FROM pfile”) database.execSQL(“UPDATE profile_new set tun = ‘$tun’“) database.execSQL(“DROP TABLE pfile”) database.execSQL(“ALTER TABLE pfile_new RENAME TO pfile”) This is the method in the DAO @Query(“SELECT * FROM pfile”) fun getData(): List<Pfile> Following is the error we see, java.lang.IllegalArgumentException column ‘tun’ does not exist. Available columns: [id, name, lname, rlhip, sex, wk, un, lun, pn, dd, pdd, photo, hk, th, fun, swk] com.example.database.dao.UserDao_Impl.getData

Hello, I was wondering if anybody could give me any guidance for adding recyclerview to my project. I haven't done any android development for a very long time. It used to be in the support library if I remember correctly but when I read the docs at android developer, it says to use the new

androidx

libraries. I can't seem to find the version number of the latest androidx recycler view. When I search online I see a lot of old posts which direct you back to the support library. Can anybody please help me to find what I'm supposed to put in the

implementation

portion of the gradle build???

Hi, I have a callback when you click cancel in an AlertDialog. I'm trying to figure out why the exception is not caught in this case. Can anyone shed some light on it? https://gist.github.com/frel/38aaa8a05790a401dd45317c527b85eb I assume it's because of the stack trace, but I'm not sure what the alternative would be. This is the simplest version I could think of where I'm able to reproduce the issue. I'm actually trying to make an rx stream error, but instead the app crashes.

A while ago I’ve read somewhere that

View Holder

shouldn’t be an

inner class

. I don’t remember where I read it, but I don’t see any problem with making

ViewHolder

an

inner class

. Any thoughts on this?