How can I convert my Kotlin Array to a varargs Java String[]? val angularRoutings = arrayOf<String>(“/language”, “/home”) // this doesn’t work web.ignoring().antMatchers(angularRoutings) How to pass an ArrayList to a varargs method parameter? 1 Answer 1
As the title, is there any way to call a function after delay (1 second for example) in Kotlin? 12 Answers 12
In Java we could do the following public class TempClass { List<Integer> myList = null; void doSomething() { myList = new ArrayList<>(); myList.add(10); myList.remove(10); } } But if we rewrite it to Kotlin directly as below class TempClass { var myList: List<Int>? = null fun doSomething() { myList = ArrayList<Int>() myList!!.add(10) myList!!.remove(10) } } I … Read more
In the kotlinx.coroutines library you can start new coroutine using either launch (with join) or async (with await). What is the difference between them? 8 Answers 8
I am trying to set text in a EditText but it says: Type mismatch. Required: Editable Found: String My code is as follow: String name = “Paramjeet” val nametxt = findViewById (R.id.nametxt) as EditText nametxt.text = name Don’t say to use setText because I am using kotlin, not Java. 14 Answers 14
Given function foo : fun foo(m: String, bar: (m: String) -> Unit) { bar(m) } We can do: foo(“a message”, { println(“this is a message: $it”) } ) //or foo(“a message”) { println(“this is a message: $it”) } Now, lets say we have the following function: fun buz(m: String) { println(“another message: $m”) } Is … Read more
I have an Android studio project in which I have added a Java library module, which I call core. My three Gradle build files look like this. project/build.gradle buildscript { ext.kotlin_version = ‘1.2.40’ repositories { google() jcenter() } dependencies { classpath ‘com.android.tools.build:gradle:3.0.1’ classpath “org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version” } } allprojects { repositories { google() jcenter() } } task … Read more
A generic method that can return a random integer between 2 parameters like ruby does with rand(0..n). Any suggestion? 23 Answers 23
After upgrading my phone to 8.1 Developer Preview my background service no longer starts up properly. In my long-running service I’ve implemented a startForeground method to start the ongoing notification which is called in on create. @TargetApi(Build.VERSION_CODES.O) private fun startForeground() { // Safe call, handled by compat lib. val notificationBuilder = NotificationCompat.Builder(this, DEFAULT_CHANNEL_ID) val notification … Read more
How do I fix the deprecation warning in this code? Alternatively, are there any other options for doing this? Handler().postDelayed({ context?.let { //code } }, 3000) 19 Answers 19