Android - Unmute VideoView on Button Click I'm actually setting up a simple videoView, that would be muted (sound) when the activity starts, then the sound can be activated via a button press. I don't want to use the AudioManager, but the Media Player instead. I didn't find what i did wrong, yet. Seeking for help. My code is actually in Kotlin, but i believe even a java solution would help me. Here is my code: import android.net.Uri import android.support.v7.app.AppCompatActivity import android.os.Bundle import...

Kotlin Fİrebase stograge imageUri error reference .putFile(imageUri) kotlin.UninitializedPropertyAccessException: lateinit property imageUri has not been initialized at com.ysnel.envantert.StandUpdate.update(StandUpdate.kt:177) at com.ysnel.envantert.StandUpdate.access$update(StandUpdate.kt:19) at com.ysnel.envantert.StandUpdate$onCreate$3.onClick(StandUpdate.kt:73)...

Kotlin Common Dialog Not Showing Unable to showing Common Dialog.I am new in Kotlin.Does any guys meet this issue? I have tried class CommonStaticClass { fun showCommonPopUp(activity: Context, msg: String,drawable: Int): Dialog { val metrics = activity.resources.displayMetrics val dev_width = metrics.widthPixels val dev_height = metrics.heightPixels val dialogCommon = Dialog(activity)...

Kotlin Generics type parameters At the following source code fun main(args: Array) { println("Hello, world!") val mutableIntList = mutableListOf(1, 2, 3) addInt(4, mutableIntList) // No compile-time error addAnotherInt(5, mutableIntList) // Compile-time error println(mutableIntList) } fun addInt(item:T, list:MutableList){ list.add(item) } fun addAnotherInt(item:T, list:MutableList){ list.add(item) } The functions addInt and...

Database application [on hold] Now I want to transfer the Database application was done in the environment of Android Studio and the language of Kotlin from the local server to the public server How can I do this and how to get started

Why do I have different versions of Kotlin JARs in the classpath? I decided to add a couple Kotlin files to an existing Java Android project in AS 3.0. Once I added Kotlin files, I let the assistant add the appropriate lines to my build.gradle files, in particular: project build.gradle buildscript { ext.kotlin_version = '1.2.21' //... dependencies { classpath "org.jetbrains.kotlinkotlin gradle plugin$kotlin_version" app build.gradle // top of file apply plugin: 'com.android.application' apply plugin: 'kotlin-android' //.......

Typecasting Error in Kotlin: ArrayList I am creating a music player app, In which there are a recycler view and many fragments. I am getting an error on my MainScreenFragment.kt file. I checked the error log and the error its shows is: ******Caused by: kotlin.TypeCastException: null cannot be cast to non-null type kotlin.collections.ArrayList /* = java.util.ArrayList */ at com.thepanku.musicplayer.Fragments.MainScreenFragment.onCreateView(MainScreenFragment.kt:60)...

Using Fuel's responseObject with a generic call site I've a problem using Fuel's responseObject in a generic fashion. I'm trying to develop a centralized method with components getting their HTTP response object already deserialized, ready to go. It looks like this: class Controller(private val url: String) { fun call(endpoint: String): T { return "$url/$endpoint".httpGet().responseObject() } } class App(private val controller: Controller) { fun getModel() { val model = controller.call("model") // use model } } Of...

Android WebView - JWT Authentication I have an Android app that I'm switching from basic auth to JWT so that, among other reasons, I don't have to store the user's password locally. This is working well for all of my API requests, but one part of my app uses a WebView to show custom content that is hosted on my server. This content also requires authentication and currently I use the username/password combo in the WebViewClient class to supply the credentials. Now that I'm going to JWT I no longer have these credentials, only...

Kotlin string split with readLine() method So I have this Java code: String values = input.nextLine(); String[] longs = values.split(" "); Which splits the string input into a string array. I try it in Kotlin var input: String? = readLine() var ints: List? = input.split(" ".toRegex()) and I get an error: "Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of the the type String?" I am new to Kotlin and would like some clarity on how to do this. Thank you!

Custom URLSpan don't trigger onClick event, using kotlin I have this layout: And this code to implement and set my customized URLSpan as the textView text val urlSpan=object:URLSpan("http://10.0.2.2/feed.xml"){ override fun onClick(widget: View?) { longToast("link was clicked!") } } val spannableString=SpannableString("this is a spannable link") spannableString.setSpan(urlSpan,10,19, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) textView.text=spannableString But the onClick event of my customized URLSpan never...

How can I use Kotlin in Sublime Text3? I want to try Kotlin in Sublime Text3, but I don't understand how to do it well even when I saw some websites. Please tell me how to do it in detail?

Returns and Inlines (Kotlin) Hi so I am trying to find the equivalent Kotlin equivalent to this java return: return new int[] {1, 2, 3}; I've tried just declaring then returning like this: val returnArr: IntArray = intArrayOf(1, 2, 3) return returnArr But I get a warning that says "Variable used only in following return and can be inlined" As a Kotlin noob, what exactly is meant by inline? Is there a way to do this all on one line? Cheers!

Can't get Room DB to run with Kotlin You can find all of the code in my repo: https://github.com/NWuensche/BookNotes/tree/add-room-db I get the following error: E/AndroidRuntime: FATAL EXCEPTION: main Process: com.nwuensche.booknotes, PID: 22753 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nwuensche.booknotes/com.nwuensche.booknotes.MainActivity}: java.lang.RuntimeException:...

Maven fails with spring boot, junit 5, kotlin I have a Kotlin Spring Boot application and using JUnit 5 for test. When i build project in Idea - it successfully builds. When i run test in Idea - all tests passes. When i run test with mvn test - all tests runs and passes. When i run mvn spring-boot:run - application successfully starts. But when i run mvn clean package i have a following exception: Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class...

How to use SVG with kotlin-react Hi could someone help me how use SVGs with Kotlin React. I'd like to achieve similar thing as with following example using react and javascript: const MyComponent = ({radius, color}) => ( ) Unfortunately I haven't been able to find by myself any example or sufficient documentation. Using Kotlin i don't know what language features I could use to achieve the same. Could anyone help me to fill following snippet using Kotlin? fun RBuilder.MyComponent(radius: Int, color: String)...

Kotlin throws NullPointer exception I am starting to use Kotlin alongside with Java. This below code in java. Throws no null pointer exception initFoodQuantitySpinner(); CartDb cartDb = new CartDb(getActivity()); try { P.addToCart(getActivity(), food.getId(), food.getPrice(), foodQuantity); } catch (Exception e) { e.printStackTrace(); } FoodCartModel foodCartModel = new FoodCartModel(new Food(food.getId(), food.getName(), 0, "", "", food.getPrice(), 0,...

How to implements OnlickLister interface in Kotlin? How to implements OnlickLister interface in Kotlin as we do in Java ,and handle the ids like switch case?

How to rename a property's backing field in Kotlin You can easily rename the getter and setter of a property like so @get:JvmName("getFancy") @set:JvmName("setFancy") var fancyProperty = ... But I can't figure out how to change the name of a backing field, even using the @field target. @field:JvmName("fancy") var fancyProperty = ... The above give an error: This annotation is not applicable to target 'member property with backing field' and use site target '@field'

Reference constructor of type excluding optional parameters I am having class of type A, which has contructor, that requires parameter x and has some optional parameters: class A(x: String, y: String = "default_y") Now I want to reference constructor with required parameters: var function: (String) -> A = ::A Now I am getting problem of incompatible types as signature of that constructor is 2 strings, not just one. When I add this constructor overload, compiler stops complaining: class A(x: String, y: String = "default_y") { constructor(x:...

403 Error while trying to retrieve Reddit User's saved posts using JRAW I'm currently trying to get a users saved posts using the JRAW reddit api wrapper using this code: val helper = App.get().accountHelper val paginator = helper.reddit.me() .history("saved") .build() val saved = paginator.next() <a...

Why kotlin gradle plugin cannot build with 1.8 target? I have the simplest gradle project configured using intellij for kotlin 1.2.10. Here is my build.gradle file: buildscript { ext.kotlin_version = '1.2.10' repositories { mavenCentral() } dependencies { classpath "org.jetbrains.kotlinkotlin gradle plugin$kotlin_version" } } group 'com.ali' version '1.0-SNAPSHOT' apply plugin: 'java' apply plugin: 'kotlin' sourceCompatibility = 1.8 repositories { mavenCentral() } dependencies { compile...

How to restrict textfields in TornadoFX to numbers only The problem here is that I wanna make sure that the user doesn't enter any strings or text especially that I need to enter his choice into a database later so I don't things to get messed up in the database's part, here is part of code which is the view I wish to use the textview with restricted Integers (specifically the amount am field). PS: I'm still new to both JavaFX and TornadoFX so hope this doesn't sound like a rather silly question. My Code: package com.company.view import...

Document template generation kotlin Working before in Android Studio if before the function I put / ** and hit enter, then I automatically generated the next document with annotations for describing the parameters, the return value, etc. /** * @params a * @return */ int f(int a) { return a; } When I started working with Kotlin in Android Studio, I tried to generate a similar template, it produces blank template without returns, params, etc. /** * */ fun f(a: Int) { return a } I installed...

Android LiveData in androidTest returns null I'm running an androidTest unit test and I have a method that returns LiveData from a DAO object using Room. I'm calling the method like so: val animal = roomDatabase.animalsDao().getAnimal(1) animal.observeForever(mMockObserver) assertNotNull(animal.value) I used Mockito to mock the observer: @Mock private lateinit var mMockObserver = Observer This should return an instance of LiveData containing the Animal at id 1, but it's null. It's my understanding that in order for LiveData to...

how to make mini left sidebar "tab" in android like in product category in online shop app? I don't know if it is a tab or not, but how to make mini leftbar "tab" in android like this: and, what is the term for view like this?

Observing repository LiveData from ViewModel and notify UI Google says that is not possible to observe a LiveData from a ViewModel: [...] However ViewModel objects must never observe changes to lifecycle-aware observables, such as LiveData objects.[...] And I would handle the repo.login() result in the ViewModel and notify the UI thought the two <a href="https://github.com/googlesamples/android-architecture/blob/dev-todo-mvvm-live/todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/SingleLiveEvent.java" rel="nofollow...

Add jar to kotlin file using ubuntu terminal i have a kotlin file that need to java library in intelliJ it easy to put a jar library but in ubuntu terminal i just add the jar file to files what I have to do when i want to convert kotlin file to java for run it by java show me alot of errors about library ?

Setting top margin iText Android I am using iTextg to split an image to span multiple pages, but I am not able to set Top Margin for each page. I tried setting margins in Document() constructor, I also tried setMargins()method before I use the document.open() method. Also adding empty lines or paragraph is not working. I think I am doing something wrong here. private fun addImage(pdfWriter: PdfWriter, document: Document, byteArray: ByteArray) { var image: Image? = null try { image = Image.getInstance(byteArray)...

Creating a DB factory using kotlin So I'm trying to create a MongoDB factory with kotlin... but I think I don't really understand the concept of companion object very well because I can't even get this to compile: package org.jgmanzano.storage import com.mongodb.MongoClient import com.mongodb.MongoClientURI import com.mongodb.client.MongoDatabase class MongoConnectionFactory(private val connectionURI: String) { private var database: MongoDatabase init { val connectionString = MongoClientURI(connectionURI)...