Why try block only is not allowed? Why in Kotlin (also in Java except the case of try-with-resources) it is not possiable to write a try{} block only ? for example: this function is allowed fun tryFunction(){ try{print("hello world!")}finally {} } while this one is not allowed fun tryFunction(){ try{print("hello world!")} //build error "Expecting 'catch' or 'finally'" } in spite of finally{} block at the first example does nothing

How to include text file as resource to be compiled together as executable in Kotlin/Native? in Kotlin/JVM .txt files are usually in source/main/resources directory to be compiled into jar executable. To compile .txt files together with .kt files Kotlin/Native so that compiled executable includes those .txt, what kind of build.gradle configuration Ide setting like Idea or Eclipse Kotlin compiler option Steps of commands or things todo Are needed? And after including those .txt files, how kotlin code can be written to access those text? For example, in InteliJ Idea project for...

Intelij issue resolving dependency for spring kotlin Intellij is giving me errors all around for brand new kotlin/spring project and I cannot build or run the project from the IDE. If I do it from the command line however, there are no issues and I can build and run the app. 'classpath' in 'org.gradle.api.artifacts.dsl.DependencyHandler' cannot be applied to '(groovy.lang.GString)' 'apply' in 'org.gradle.api.plugins.PluginAware' cannot be applied to...

Get a file with custom extension in android I'm trying to get a file with custom type of .khn from user and do something with it. There's my code: val intent = Intent().setType("*/*").setAction(Intent.ACTION_GET_CONTENT) startActivityForResult(Intent.createChooser(intent,"Select a file"),200) override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if (requestCode == 200 && resultCode == Activity.RESULT_OK){ val file =...

"DataPoint field samples must be public" error when using JUnit 4 Theories in Kotlin Overview Applying @DataPoint or @DataPoints to a property in a Kotlin class results in "DataPoint field samples must be public" error. Description Theories in JUnit4 use @DataPoint and @DataPoints annotations to mark sample data which is collected and passed to individual tests that can take them as arguments. When these annotations are applied to Kotlin properties (which are also necessarily annotated @JvmStatic and declared in companion objects), the test cases fail with the error...

how i can play media player when click button in android studio kotlin hi i make app and i new in android studio with kotlin language i make audio app which have mediaplayer inside app inned to open the media when click in button but when the first time when click in play the secound click is close all media and not play i use audio manager to close all media when play this is mainactivity code import android.annotation.SuppressLint import android.media.AudioManager import android.support.v7.app.AppCompatActivity import android.os.Bundle import...

Kotlin Compiler in WIndows 10 I'm looking for a tutorial showing how to install Kotlin compiler on Windows 10, but I didn't find it. I'm getting started with programming tools and, by now, I am not intersting in installing another OS (only by now). Some tip to give me? Thank you.

Rest-assured secret token OAuth2 I have a problem when try to test login into spring oAuth2 secured app using REST-assured. When I use rest-assured basic authorisation SerenityRest.given() .header("Authorization", "Basic dGVzdDp0ZXN0Cg==") .contentType("application/json") .auth() .preemptive() .basic(login, password) .queryParam("grant_type", "password") .`when`() .log() .all()...

Performance issue with DataBinding on a Fragment My Fragment is really slow when creating, on a way that when I run the event that loads it up, the window freezes and I can't see the transition animation, on the logcat I get something like: "Skipped 55 frames! The application may be doing too much work on its main thread." My Model extends a BaseObservable and looks like: class Section : BaseObservable() { private var fck: Double = 35.0 @Bindable fun getFck(): String { return fck.toString() } fun setFck(value: String) { fck =...

Kotlin How to init BluetoothDevice I want to use bluetooth printer in my project, but I got this error lateinit property mmDevice has been not initialized This is my code lateinit var device:String lateinit var mBluetoothAdapter: BluetoothAdapter lateinit var mmSocket: BluetoothSocket lateinit var mmDevice: BluetoothDevice override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_penjualan_cetak) device = Function().getShared("printer","",this)...

Google map not visible in Fragment Kotlin i build a Kotlin project with google maps, but the in the map fragment cant load the map, is not visible And this is my code: My manifest: My Activity: package com.wiboo.luismtz.logisticaapp import...

Jsoup "bobcmn" - being blocked by F5 Scraping Detection I have been writing an alert tool in Kotlin(Java) using Jsoup, connecting to a craigslist-like website. The older sections scrape fairly easily, however the newer Home Search tool is cleverly blocking my scrape attempts by not exposing the data. I suspect <a...

How to use tablayout with bottom navigation and viewpager? I created an activity with a bottom navigation bar. I want tablayout when I want to switch to another fragment. And tablayout can control viewpager. Can I put viewpager to the specified fragment? I wanna like this: This is the current result. I want to put viewpage in the red box.

Android Webview Cannot Load Laravel Image I use Android webview to load my webpage. My webpage is built using Laravel framework. The webpage is loaded but the image in the webpage cannot be loaded/shown. I try to load my webpage using browser, it can load perfectly with the image. I try use Android webview load google.com page, the image (Google logo) load correctly. I cannot define whether my problem is in my Android webview or my Laravel webpage. Please help me. This is my Android xml code. This...

Setprogress for a progress bar across fragments android using Kotlin I am an amateur to both, android studio and kotlin. I am implementing a scenario where I have some fragments, as and when we finish with one fragment, the progress is shown on the main layout. These fragments replace the main frame layout and switching from one fragment to next is done done in the previous fragment using the setonclicklistener. However, the problem is that I am unable to see the update happening to the progressbar. By the way, I am not using any progress dialogue. All I need...

kotlin.KotlinNullPointerException in Sharedpreferences for IntroSlider android I try to add IntroSlider . I use this library = "https://github.com/apl-devs/AppIntro" I want to First time when app is install and open it it display IntroSlider Then open MainActivity, and When Secound Time open App it directly show MainActivity. When i add my code and set my SharedPreference it seems kotlin.KotlinNullPointerException Here is my code for it:= 1> PreferenceManager.kt class...

How to refresh the MediaStore when new photos are added? I have a gallery, and I'm able to ensure that every time I do any file operation with Images that I scan their paths using private fun Context.scanPaths(vararg paths: String) = MediaScannerConnection.scanFile(this, paths, null) { path: String?, uri: Uri? -> Log.d(TAG, "Scanned Path: $path and Uri: $uri") } and it works perfectly. The issue is that if I send a whole lot of images to my device through my laptop a mediaStore entry won't be made. If I open Google Photos on the...

Failed to cast type for Kotlin property from Java [duplicate] This question already has an answer here: What is the $1 in class file names? 6 answers I'm trying to print some information from a Apache HttpClient: val connectionManager = client.connectionManager as PoolingHttpClientConnectionManager LOGGER.info("Going to execute HTTP Get to [$url],...

Why is my null check unreachable? In the following example i have an nullable property userId. I would like throw an Exception if it null. Android studio is telling me the code block inside if(userId == null) is unreachable. Can anyone explain why this is unreachable? return Observable.create { it -> val userId: String? = firebaseAuth.currentUser?.uid if(userId == null){ it.onError(throw RuntimeException("Unauthorised")) it.onComplete() }else{ //Do something...

Add space between default ActionBar title and icon in Android I'm testing different supportActionBar methods in Android (as can be seen in the image below), and I want to add some space/padding between my icon and title in the ActionBar. I have seen some answers on the site, and most use a custom Toolbar widget which I am not using in my app (I'm using the default ActionBar), or to add space like " My title" which I do not think is an elegant...

Fragment View is null when try to access from Activity I have created a Fragment which is in ViewPager. Fragment is loading fine. I am using a button to swipe fragments in viewpager and before swiping, I want to check validations. So I did this in Activity : val pos: Int = viewPager.currentItem val activeFragment: Fragment? = mAdapter.getItem(pos) if (viewPager.currentItem == 0) { if (pos == 0) (activeFragment as FragmentOne).checkValidation() Below is my Fragment code. class FragmentOne:...

How to write on an ellipse? I am coding in kotlin and I want to draw ellipses over my googlemaps. I want to write Numbers on the ellipses. Now I have the problem, that I cannot find anything to how to draw without a drawable background. Or is it possible to make the ellipse as an icon and write over it, if yes, how can I do so?

Recyclerview only showing first value i am having an issue with my gson parsing. I have a nested gson and i would like get the value of "name" under attributes. The problem is my recyclerview is only showing the first value(which is bill 1) and not bill 2 or bill 3. here is my code // MainActivity.kt val bill = GsonBuilder().create().fromJson(jsonString, Bills::class.java) val nameList: List = Arrays.asList(bill) val adapter = BillsRecyclerAdapter(nameList) recycler_view.adapter = adapter...

Ormlite auto quoting conflicts while creating table in PostgreSQL I am using Ormlite to create a table using the following SQL statement generated by Ormlite: CREATE TABLE "my_table" ("main_text" VARCHAR(255) , "secondary_text" VARCHAR(255) NOT NULL , PRIMARY KEY ("main_text") ) From this DAO object: @DatabaseTable(tableName = "my_table") data class SomeDAOObject ( @DatabaseField(columnName = "main_text", id = true) val nombre: String = "", @DatabaseField(columnName = "secondary_text", canBeNull = false) val descripcion:...

Kotlin dependency not behaving like Kotlin I have a Kotlin dependency that I wrote and am now trying to use it in a separate project. When I add it to the other project variables declared like val hits = 0 can not be referenced by using the variable hits but by using getHits() which would make sense if I was using java in the second project but I am not. In other Kotlin projects I have worked on in the past this was not an issue and the only thing that I can think of that is different in the build is that I have set transitive = false...

Android jackson json: Support two data types within one @JsonProperty I have been searching here for the past few days and have tried different solution, none of which have worked for me, so I decided to sign up and ask the question myself. Here's what's going on: A json property in my project could have two data types based on the api version. It could either be a String or one key-value pair. How will I be able to allow my @JsonProperty("field_with_two_possible_types") to have two possible types and parse them correctly? Here's what my main data class...

Kotlin: val mutableList vs var immutableList. When to use which? We are encourage to have immutable variable as much as we could. But if I have to modify a list sometimes, I wonder which approach should I be using... val mutableList = mutableListOf() where I could just add, remove accordingly or var immutableList = listOf() where I would create a new list (using filter or +) each time a change is made. I guess there are different scenarios one is preferred over the other. Hence would like to get to know when one should be used over the other etc.

why kotlin by lazy can cause memory leak in android? I define a loading Dialog like this private val loadingDialog: LoadingDialog by lazy { LoadingDialog() } loadingDialog is a DialogFragment when I use leakcanary to watch my app, I find the loadingDialog cause memory Can somebody help me?

java.math.BigDecimal divide: 1.0/2.0 == 0.0 while 1.1 / 2.0==0.55 In java/kotlin, BigDecimal divide returns strange results. BigDecimal(1.0) / BigDecimal(2.0) == 0.0 // Just like Int(1) / Int(2) == 0 But: BigDecimal(1.1) / BigDecimal(2.0) == 0.55 // Just like Double(1.1) / Double(2.0) == 0.55 So why it happens, and how to make 1.0 / 2.0 == 0.5 in BigDecimal without using divide() giving a scale parameter?

Firebase - Get all Children and add to ListView I have 4 fragments in an activity, the Database Fragment, currently holds the ListView that will query Firebase to get the child from a parent node, "Asset". Also, the ListView have a custom adapter that has enables it to have a title and subtitle. This is the Main Activity: private var toolbar: ActionBar? = null override fun onCreate(savedInstanceState: Bundle?) {...