Retrofit + RxJava Not making API Request I have an issue with Retrofit and RxJava2 in Kotlin. Here is my build.gradle: // Retrofit implementation 'com.squareup.retrofit2retrofit2.6.1' implementation 'com.squareup.retrofit2adapter rxjava22.6.1' implementation 'com.squareup.retrofit2converter moshi2.6.1' implementation 'com.squareup.okhttp3okhttp4.2.0' implementation 'com.squareup.moshimoshi kotlin1.8.0' // RxJava implementation 'io.reactivex.rxjava2rxandroid2.1.1' implementation 'io.reactivex.rxjava2rxjava2.2.11' I...

Android : I want play video from server like mx player quality Any one can help me which server is used in "MxPlayer" for online video play.I need implement in our app.

Android Instrumented testing asserting if an activity is started I am developing an Android application using Kotlin programming language. I am adding instrumentation tests into my application. Now I am trying to test if an activity is started after some delay. This is my activity code. class MainActivity : AppCompatActivity() { companion object { val LAUNCH_DELAY: Long = 2000 } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main)...

Android Kotlin expresso asserting intended activity in the unit test is throwing error I am developing an Android application. I am adding instrumented tests to my application and testing if an activity is launched using expresso. But I am getting error in asserting that an activity is launched using the Expresso test framework. I added the following express packages into my app gradle androidTestImplementation "androidx.test.espressoespresso core$expressoVersion" androidTestImplementation "androidx.test.espressoespresso intents$expressoVersion" This is my activity...

Can't use the same DisposableObserver with subscribeWith twice after dispose() The code (Kotlin) is very simple, but I don't understand, why I can't use the same object to subscribe again? val x = Observable.interval(1L, TimeUnit.SECONDS, Schedulers.io()) .map { println("emitting=$it") it.toString() }.publish().autoConnect() val o = object : DisposableObserver() { override fun onComplete() {} override fun onNext(t: String) = println("O:=$t") override fun onError(e: Throwable) {} } println("---------- subscribe ----------") val s2 =...

Unintended behaviour as a result of pressing back button I have two activities. Activity A contains a recycler view of card view elements with images in them. On selecting an element in Activity A. The full landscape version of the image is displayed in Activity B. The layout file for Activity B is a follows: The codebase for Activity B is as follows: class PosterViewActivity : AppCompatActivity() { private lateinit var imageView: AppCompatImageView override fun onCreate(savedInstanceState: Bundle?) {...

Android unit testing if an activity starts with a timeout or after a delay is not working I am developing an Android application using Kotlin programming language. I am adding instrumented tests into my project. Now, I am having a problem with testing if an activity is started after a delay. I am using Espresso for instrumented tests. This is my activity class class MainActivity : AppCompatActivity() { companion object { val LAUNCH_DELAY: Long = 2000 } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

Memory Leak in Dialog Fragment I have a Dialog Fragment named SignInDialogFragment which is called from HomeActivity. When it is called, it presents username and password EditText fields and convey the input with Interface to related functions in HomeActivity. When I call SignInDialogFragment from HomeActivity and then dismiss it without doing anything, LeakCanary warns me that there is a memory leak. Here is how SignInDialogFragment is set in HomeActivity: private val signInDialogFragment : SignInDialogFragment by lazy...

ItemTouchHelper does not initiate swipe I have looked up many tutorials on the swipe functionality to the RecyclerView. When I attach the ItemTouchHelper, it has no effect on the ViewHolder. I had put a put a breakpoint in onSwiped method but it does not even reach there when I am trying to swipe. I made a new project and just implemented a random recyclerview with some view holders. I attached the ItemTouchHelper and I had the same problem. override fun onViewCreated(view: View, savedInstanceState: Bundle?) { val model =...

@Singleton annotated class creates multiple instances with Dagger2 in Kotlin I have a class annotated with @Singleton like this: @Singleton class SomeClass @Inject constructor() { ... } and I use it in other classes like this: class OtherClass { @Inject lateinit var someclass: SomeClass init { DaggerAppComponent.create().inject(this) } } @Component @Singleton interface AppComponent { fun inject(otherClass: OtherClass) } But I get different instances in every class I inject SomeClass into. What am I doing wrong?

List item contents don't follow constraints after scrolling I have an expandable list view. The child elements use a ConstraintLayout with 3 elements inside (2 text views and one ImageView). The image view should only be visible for some list elements (with label=foo in the example). This works, however the problem is that when scrolling down and up, the constraints don't seem to be followed. The problem is not the wrong list elements having the ImageView visible, the problem is how the stuff within the items aren't aligned properly after scrolling,...

How can I add the main class to MANIFEST.MF for a Kotlin jar built with Bazel? I'm building a very simple jar with one main method. I've got the Kotlin rules working, and I can build the jar just fine: kt_jvm_binary( name = "myapp", main_class = "MainKt", srcs = ["src/main/kotlin/Main.kt"] ) However, that main_class argument doesn't add anything to the manifest to allow me to run the jar (I assume the one in the bazel-bin folder is the right one). I've tried using a library then compiling it using the java_binary rule instead: kt_jvm_library( name =...

Android enabled bluetooth and scan for devices I am trying to develop BLE code for Android app, using several examples but I constantly have disabled BLE state. I am using an Amazon FireFly tablet with the most up to date o/s and I can see all the BLE devices when I scan for Bluetooth devices in the setting menu. But, cannot see any BLE devices when I run this code. The "if(!m_bluetoothAdapter!!.isEnabled()) " always return a false condition and never performs a device scan. Is there something else I need to do on the false condition,...

Experiences migrating from Groovy to Kotlin Now I have an application builded in Groovy and I would like to migrate it to Kotlin. Because the current one doesn't has Object Oriented Design Paradigmn and it was builded more dynamically using maps and arrays instead of objects. Besides that it doesn't has good clean code practices. Other advantages of using Kotlin I think could be in the IDE level: Auto-completion and content assist quick documentation navigation to source refactoring and more Anyone with this experience could share...

Kotlin's safe-cast (or in this context "unsafe"-cast) hides possible NullPointerException warning by Android Studio While developing in AS with Java, below line shows warning that toggleSoftInput may produce NPE. Which is quite helpful if you forgot NPE check. InputMethodManager imm = (InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE); imm.toggleSoftInput(....); But in the case of Kotlin, this becomes a problem. Casting with as means IDE won't bother to check if toggleSoftInput() may produce NPE or not because as implicitly implies so. val imm =...

RecycleView List with SearchView ist empty after back pressed I am struggling with setting up my recycle view with a search view, well not really because my search view does work with my recycle view. The filter works and the items are displayed liek i want them to after i entered my search query. But when i click a list item to show the details and in the detail view press the back button, the list won't show me my items, the list is empty. I think it as someting to do with my filtering setup because when i don`t set the OnQueryTextListener it just...

Retrofit with Login InstagramAPI When I try to use the following url through the browser, I have an api where I can access the followers of that account by entering the id of that account if an instagram account is logged in from the browser without requiring access_token. My goal is to attract the user's followers with android studio. I know how to use retrofit, but how do I login with instagram retrofit? Can you help with this? <a...

setting log level ignored I am using kotlin with gradle and it works great except I can not configure the log level for my SimpleLogger I have a one line src/main/resources/simplelogger.properties with the following content: org.slf4j.simpleLogger.defaultLogLevel=debug this is my build.gradle buildscript { ext.kotlin_version = '1.3.10' repositories { mavenCentral() } dependencies { classpath "org.jetbrains.kotlinkotlin gradle plugin$kotlin_version" } } apply plugin: 'kotlin' apply plugin:...

Kotlin Char MAX_CODE_POINT - Unresolved Reference According to this document: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char/index.html Char has a companion object property MAX_CODE_POINT. But, when I try to access it, I get: $ kotlinc-jvm Welcome to Kotlin version 1.3.50 (JRE 1.8.0_212-b04) Type :help for help, :quit for quit

>> Char.MAX_CODE_POINT

error: unresolved reference: MAX_CODE_POINT Char.MAX_CODE_POINT ^...

Creating dinamicaly Markers and accessing by variables for Google Maps Api on Kotlin Im making a project where i need to add and remove some markers created dynamically. i'm creating my markes this way: private fun AddMarkerFromArray(name:String, adrsString,codString,imgSrc:String){ val info = MarkerDataNormal(name, adrs, cod ) val markerOptions = MarkerOptions() markerOptions.position(LatLng(0.0,0.0)) .title("Location Details") .snippet("I am custom Location Marker.")...

Getting values from an edittext into a recyclerview I wish to create a system whereby a user enters a value in the edittext, presses enter on the keyboard and the entered text is added to a recyclerview as serial number 1,then the user enters another text again into the same edittext, presses enter and the new entered value is added to the recyclerview as serial number 2.

How to add a dependency in a multiplatform kotlin / native intellij project? I have the following build.gradle configuration: plugins { id 'org.jetbrains.kotlin.multiplatform' version '1.3.41' } repositories { mavenCentral() } kotlin { linuxX64("linux") { binaries { executable { entryPoint = 'sample.main' runTask?.args('') } } } sourceSets { linuxMain { dependencies { api("org.http4khttp4k core3.183.0") } }...

LiveData and Interfaces (Kotlin Generics question) I am trying to define an interface for a viewmodel, interface MyViewModelInterface { val state: LiveData } interface MyFragmentInterface { protected val mViewModel: MyViewModelInterface protected fun render(state: MyState) } The idea is to have many viewmodels with their own state objects and each will be an implementation of MyViewModelInterface. Then associated fragments will each have a viewmodel that is guaranteed to provide a livedata that they observe and on change...

Methods and member functions in Kotlin Kotlin Reference section on Functions states that 'A member function is a function that is defined inside a class or object': I have also seen references to methods in Kotlin. Are methods and member functions the same, different or misuse of terms?

how to change the notification icon in home activity as soon as a push notification arrives in android I'm using push notification in my app ,i need to change the notification icon in my home activity as soon as the notification arrives.can we use interface inside firebase service for this purpose.

Kotlin LiveData is unresolved I a working on a view model and using retrofit to retrieve my data. The view model consists of a list and I am trying to use live data to store them. val events: LiveData = liveData(Dispatchers.IO) { val retrivedEvents = eventRepo.getEvents(1) emit(retrivedEvents) } On liveData and emit I get unresolved reference but I believe I have every thing imported correctly. import androidx.lifecycle.* import kotlinx.coroutines.Dispatchers Any help would be great I am so lost on what...

Kotlinx Serialization - Custom serializer to ignore null value Let's say I'm having a class like: @Serializable data class MyClass( @SerialName("a") val a: String?, @SerialName("b") val b: String ) Assume the a is null and b's value is "b value", then Json.stringify(MyClass.serializer(), this) produces: { "a": null, "b": "b value" } Basically if a is null, I wanted to get this: { "b": "b value" } From some research I found this is currently not doable out of the box with Kotlinx Serialization so I was trying to build a custom serializer...

What to import for getSpans, getSpanStart, getSpanEnd? I am referring to this documentation. I am getting unresolved reference errors for getSpans, getSpanStart, getSpanEnd, and it. What package do I have to import? I have already imported these: import android.os.Bundle import android.text.* import android.text.method.LinkMovementMethod import android.text.style.ClickableSpan import...

How to make overlay receive touch events without consuming the touch for the other apps? I'm currently trying to make a utility overlay similar to Facebook Messenger chatheads in which you can move the view around the screen. When you click the view, it expands into a more complex layout. However, the problem is if I set the LayoutParams' flag to WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE, the apps behind receive the touch events while my overlay doesn't receive any touch events at all. But if I remove that flag, the overlay receives the touches but it blocks the touch....

Kotlin Exposed - selecting based on sub-query count In my data model I have a very simple one-to-many relationship between challenges and it's whitelist items. I am trying to select a challenge filtered by whitelist. Basically the challenge selection criteria is when the challenge is either does not have any entries in whitelist for itself or the whitelist matches by name. This can be achieved with quite simple SQL query: select c.* from challenge c, challenge_whitelist w where (c.id = w."challengeId" and w."userName" = 'testuser') or...