kotlin data class HttpMessageNotReadableException I'm trying this code with postman, but nothing works, why ? What i send : { "name":"front_msel", "gitlabId": "83", "fichierVersion":"VERSION" } My spring controller : @RestController @RequestMapping("/projects") class ProjectController(val projectRepository: ProjectRepository) { private val log = LoggerFactory.getLogger(ProjectController::class.java) @PostMapping() fun saveProject(@RequestBody payload: Project): String { log.info("project: '{}'",...

Change BottomNavigationView Icons on Back Button clicked At the bottom of my layout I have a BottomNavigationView with three fragments. If I click the back button the fragment is switching but not the bottom icons. How can I fix it? addToBackStack() works. Maybe you have some advise to pretty the code. Is it good practise to have the fragment tags in the activity or fragment? public class MainActivity extends AppCompatActivity { private FragmentManager mFragmentManager; private BottomNavigationView mBottomNavigationView; private...

How to register Android to Firebase Cloud Messaging token via own backend? I create a library which I included in my Android App. Lib: override onMessageReceived(remoteMessage : RemoteMessage) { val intent : Intent(UNIQUE_ID) intent.putExtra("PARAM_REMOTEMESSAGE", remoteMessage) LocalBroadcastManager.getInstance(this).sendBroadcast(intent) } My Lib enables Firebase Cloud Messaging and Broadcasts incoming FCM as an Intent to my Android app, it works so far so good: Android app: FirebaseMessaging.getInstance().subscribeToTopic("woosah") // 1 val token =...

Android. set textSize so it's height matches a percentage of it's parent layouts height - possible? My task is simple, but any solution seems very complex... I have an app that dynamically generates 17 tablerows with a textView/editText in each row. Right now the textSize is hardcoded to 20f for all textViews/editText - it looks decent on my phone but it is not very compatible with fx. a tablet. I want to set the textsize to a number that will make the height of the text 1/17 of its outer container. each tableRow will then fit perfectly on the screen no matter what size/resolution the...

Android Toolbar menu items never shows, but goes into overflow I am trying to implement the toolbar that Android made available in v21 with a menu where the menu items are set to show "ifroom", but the menu items always collapses into the overflow. They also collapses into the overflow if the menu items are set to show "always". I hope someone can point out what needs to changed to make it behave correct. I would like to find a solution which doesn't do it using appcompat to achieve it, as I can see most other solutions does. Below I have attached my...

How to control when Imports are replaced by wildcard in Android Studio in Kotlin files I noticed that for up to 4 imports from the same package, auto-import will simply append the import in the list: import android.support.v7.widget.AppCompatImageButton import android.support.v7.widget.LinearLayoutManager import android.support.v7.widget.RecyclerView import android.support.v7.widget.Toolbar But adding a 5th import will make auto-import switch to a wildcard: import android.support.v7.widget.* Is there a way to keep auto-import on but tell it to not do that, or change the...

In Kotlin how to pass a fragment to FragmentManager.replace properly In the last method I get Type mismatch: inferred type is android.support.v4.app.Fragment but android.app.Fragment! was expected I am not certain how to resolve this in Kotlin. var fragment: Fragment = null var fragmentClass: Class? = null fragmentClass = CardBackFragment::class.java try { fragment = fragmentClass!!.newInstance() as Fragment } catch (e: Exception) { e.printStackTrace() } fragmentManager .beginTransaction() .replace(R.id.flContent, fragment)

What's wrong with my calculator android application? Iam making an app that work like calculator.. But my problem is that when i get integer value from EditText into TextView it is not working .. here is my code . please guide me in proper code EditText etfirst,etsecond; Button btnadd; etfirst = (EditText)findViewById(R.id.etfirst); etsecond = (EditText)findViewById(R.id.etsecond); btnadd = (Button)findViewById(R.id.btnadd); btnadd.setOnClickListener(new View.OnClickListener() { @Override...

Is there a way to show all the extension functions of a given Kotlin class in Intellij IDE? The only way I've found so far is to create an instance of the given class and then using the autocomplete to see all possible functions. Obviously, this way is cumbersome and takes too much time. Is there a neater way to see all possible functions?

How to pass an anonymous implementaiton of an interface in kotlin I am try to convert java code to kotlin final AltexImageDownloader downloader = new AltexImageDownloader(new OnImageLoaderListener() { @Override public void onError(ImageError error) { // Here you should show something to the user, right? } @Override public void onProgressChange(int percent) { // Here you can show the percentage of progress and...

How to do sum of elements for multiple list in kotlin I want to combine two item list by sum of items group by it's count. object definition:Item (name:String, count:Long} var list1 : MutableList = //From API 1 call var list2 : MutableList= //From API 2 call Example: Item 1: [{"pen",2}, {"pencil, 3}] Item 2: [{"pen",6}, {"chair, 2}] Output like: Final list: [{"pen",8}, {"pencil, 3}, {"chair, 2}] How do I achieve in kotlin using any collection inbuilt function? I see but I could not found better ways. I don't want to write...

How to Handel Map In android using Kotlin class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } }

Kotlin inlined extension property I know inline keyword means to avoid the call overhead calling a funtion. But I can't figure out what inline a extension property work for? Let say we have two extension property named foo and another with is inlined named bar val Any.foo : Long get() = Date().time inline val Any.bar : Long get() = Date().time Executing any of them, we gent the expected output, the current time. The bytecode for this file is this below: public final class InlinedExtensionPropertyKt {...

Handler post is not working in Kotlin, what is wrong Could someone show me what is wrong, I try to use a Handler post a Runnable but it's not execute var mHandler: Handler? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) mHandler = Handler() var runnable = Runnable { Log.d("TEST", "++++ runable") Log.d("TEST", "++++ come end") } Log.d("TEST", "++++ runnable" + runnable) Log.d("TEST", "++++ handle" + mHandler)...

Check Activity in MultiWindowMode or not Kotlin How to check if my activity is in MultiWindowMode or not I have used activity.isInMultiWindowMode() activity.isInPictureInPictureMode() but showing error do i have to extend something as MultiWindow is not recognizing i have gone through other post regarding multiwindow but no hope

Inject the data class coming from retrofit Is there a way to inject the data class that been created using retrofit response to an activity ? I am getting some data from the server in the SplashScreen , then i am casting these data classes to json string and send them using intent to the MainActivity .. but i think it's a bad idea. Also I don't want to use localDb for now like SP or Sqlite .

Android draw behind status bar shifting issues So my goal is to have two fragments where one has no ActionBar (which I am using a Toolbar and app theme is NoActionBar) and draws behind the status bar. And another that does not draw behind the status bar and implements my toolbar. I have all of this working except for some unwanted behavior. My first fragment that is applied on startup is full screen and draws behind status bar, when I switch my other fragment the only behavior I can seem to get is to have my whole entire view get...

How to get data from more than one json api I have more than one json api ex: api1 ,api2 and api3 Each one of them has different structure from the others, I want to get data from these three api and combine them in one recycler view , i searched about these subject but couldn’t get any useful tutorial i am already using retrofit for fetch data from only one api , should i using rxjava withe retrofit to do what i want And how .

Hibernate with Kotlin: @ManyToOne(fetch = FetchType.LAZY) I am using Hibernate with Kotlin and I am having an issue with FetchType.LAZY on @ManyToOne relations. Consider following: @ManyToOne(fetch = FetchType.LAZY) open var event: Event? The problem is that when FetchType.LAZY is used, the fetched Event will be of class Event_$$_jvst_... with JavaassistLazyInitializer on it. But the event will never be initialized, everything will be null or empty. Once the FetchType.LAZY is removed, everything works correctly. This didn't happen in Java. I...

None of RxJava subscriber onNext/onError/onComplete get called when chaining Observables created from Observable.create() I'm trying to implement a basic RxJava chaining call where Getting the user name and photo from Facebook Graph API Use that information to then register with my Backend service So I try using flatMap like below getProfileFromFacebook().flatMap { user -> userRepository.createUser(user) } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { Log.d("test", "onNext") }, { Log.d("test",...

Unable to access variable from innerclass : Kotlin android I am new to Kotlin development in android. here I am trying to access a variable defined in a class from it's inner class as below. class MainActivity : AppCompatActivity() { var frags: MutableList = mutableListOf() //.............onCreate and other methods .... internal class CustAdapter(var arrayList: ArrayList) : RecyclerView.Adapter() { override fun onBindViewHolder(holder: MyViewHolder?, position: Int) { holder!!.bindItems(arrayList[position]) } override...

Is it possible to express kotlin 'with' method equivalent in Scala? Kotlin Standard lib contains the 'with' method that receives an object and a method of that object defined as: public inline fun with(receiver: T, block: T.() -> R): R = receiver.block() And can be used as: val str = "string" with(str) { println(size)) // will print 6; equals to "string".size println(substring(3)) // will print (ing); equals to...

Is Kotlin able to define many variables in one line? I asked myself how to define many variable in one line in kotlin ? Do you know how to do that, Is kotlin able to do that ? Can someone help me ? For exemple how to define "score" and "try" in one line consider as Integer variables ? var score:Int? = null var try:Int? = null Also, can someone help me to read char variable ? Like this : var rep = readLine() // Instead of an String I want to read a Char Thanks you, BX_Stud.

Access edittext Of Activity from BroadcastReceiver Class in android using kotlin I want to disable my edittext field if no internet connection is available. So, for that, i had make broadcastreceiver class to detect network change activities and when i receive broadcast that no internet connection is available, at that time i want to disable my edittext field and as internet connection is made on by user the field should be enabled automatically. Most important thing is that i am doing this thing using kotlin and i had found many solutions but all are for java. So, please...

How to read a character in Kotlin? Can someone help me to read a char variable ? Like this : var rep = readLine() // Instead of an String I want to read a Char Thanks you, BX_Stud.

Android library module does not compile when using classes from pure Kotlin module I have a project using this structure: https://github.com/android10/Android-CleanArchitecture, and I am trying to convert it to Kotlin. The domain module compiles just fine, but when I try compile the data module I get the following error: Unresolved reference: ThreadExecutor` and some other similar errors. These errors are about interfaces, dataclass or Dagger singletons. It seems that the...

Kotlin android. binding not update data Good evening! I try to use binding in kotlin, but data aren't update. All compile and work, but when user change text and click bsave -> i try to return data from textEdit, and data is not updated. TextEdit contains old data. In java it is working, but in kotlin i have problem. Can you help me? It is my method onCreate, here i create model and binding its. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding =...

Kotlin Unit Test Not Finding Module Dependency Interface I have an app module and a domain module. In my domain module I have an interface called Repository. In my app module I use dagger to inject an implementation for this into my class and this works fine. When I then go to test it using a kotlin unit test, at runtime I get a NoClassDefFoundError. I have also tried to include the domain module in my app modules dependencies like so but that also did not work: testImplementation project(':domain') Here are my current test dependencies and...

Kotlin anko onclick is unresolved reference I am new to Kotlin and anko, I am phasing an error on android studio 3.0 beta 6,Kotlin version 1.1.50 and anko 0.10.1 Error: Kotlin anko onclick is unresolved reference

Flowable created in flatMap never canceled I have a Flowable that whenever a value is emitted from it I need to do a series of async lookups to Firebase. My Firebase queries need to be remain open as long as the LatLngBounds haven't been changed. Once the LatLngBounds have changed, resource cleanup should happen against the old query but it isn't happening. The code below is a simplified version of what I need. Why is the flowable created in the flatMap never canceled? val bounds = Flowable.create(FlowableOnSubscribe {...