Android Studio: What is the pathname to my assets directory? I created a directory named "assets" inside of main at the same level as res. In kotlin the "assets.open(filename)" should open an inputstream of that file. All I'm trying to do is get an image Uri from a file in assets, but I keep getting FileNotFound exceptions. selectedPhotoUri = Uri.fromFile(File("app/src/main/assets/image.png")) I have also tried: selectedPhotoUri = Uri.fromFile(File("assets/image.png")) selectedPhotoUri = Uri.fromFile(File("image.png")) Thank...

Kotlin Coroutines, pie chart doesn't spin I have a problem with my pieChart spin function. When I call it in main threat it works exactly as expected but, when i call it in coroutines, it does nothing. I debugged the code,it goes into spinWheel() function but doesn't execute pieChart.spin function. Here is the code. GlobalScope.launch { while (!isSpinned) { try { rotationDegree = pieChart.rotationAngle - 270 if (rotationDegree > 40) { isSpinned = true...

Spock:Mock Same Class Method I am trying to throw exception from my child class when it is called from parent method in the same class.Is it possible to mock and throw and exception from child class in spock? class Main { public void test1() { String result = test2() } public String test2() { //this method throws exception } }

about Jar file and ignore and kotlin-android-extensions There was a problem with android studio. android studio can't always download the jar file. I'm adding it myself, and all the views are ignored.

Unresolved reference: btn_login for button in MainActivity.kt in Android studio I am new to android studio as well as Kotlin, so here I tried to put some hands on init and encountered some error. I have made a simple program of login but I am not able to use login button. The error shown is Unresolved reference: btn_login Here is my MainActivity.kt file package com.example.roomdata import android.content.Intent import androidx.appcompat.app.AppCompatActivity import android.os.Bundle class MainActivity : AppCompatActivity(){ override fun...

Kotlin Coroutines - Suspend function returning a Flow runs forever I am making a network repository that supports multiple data retrieval configs, therefore I want to separate those configs' logic into functions. However, I have a config that fetches the data continuously at specified intervals. Everything is fine when I emit those values to the original Flow. But when I take the logic into another function and return another Flow through it, it stops caring about its coroutine scope. Even after the scope's cancelation, it keeps on fetching the data. TLDR:...

How to reconnect the device in background using Companion Device Pairing in Android I have implemented companion device pairing in dummy project using this Companion Device Pairing Documentation link. But I did not found sufficient information about how to reconnect with the device when the App is in background. Since we are not giving location permission, we cant use BluetoothAdapter.LeScanCallback.

Android ViewModel object recreate with kotlin but not with java Im new to kotlin, and mvvm, but i was able to make it work in java, but when i made a new example mvvm-retrofit-corutines in kotlin, the view model gets called all the time on the OnCreate function is called, (which shouldn't happen according to docs and works fine in java). MainActivity: lateinit var viewModel : MyViewModel override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) //Here we can see the logs in...

How to Count, Compare and store data in Array in Real Time Data coming in micro seconds from sensors using RxJava 2 Android fun checkT1Value(eventData: EventData?) { if(eventData.a == 3.9) { if(eventData.received_at - Tbuffer_firstReading!! >= 200000) // This is time Difference condition { val alphaValuesArray: DoubleArray = doubleArrayOf(eventData.a) // Also how to store real time data in Array here } } } (1) I need to Compare values ,do some computation for the data coming in Real time and also store it into Array find the maximum from it. (2) Also I want...

Android - DisplayImageOptions cacheOnDisk - How long it cache on my disk or forever? I'm using ImageLoader and I use option ".cacheOnDick(ture)". I just need to know, how long that picture are stay in my disk? or It stay forever?

i want show notification at 9:30 am everyday, How? I got some answers which are in Java, Please someone help me with Kotlin? I just want my app to ring notification every day at 9 30AM Thank you in advance

how to reference an item from layer-list.xml in activity When I try to run my app I get an error that says "Attempt to invoke virtual method on a null object reference" , that's occuring because I was trying to access items from a layer-list through main activity and I probably referenced them incorrectly which leads me here. I set the individual items from my layer-list.xml to variables, they were found by their ids. My item variables have all been returning as null. Below is my code: import android.os.Bundle import android.util.Log import...

Check all CheckBoxes in an ArrayList in Kotlin Is there a cleaner way to check/uncheck all CheckBoxes inside an ArrayList? "al" is ArrayList al.forEach { it.isChecked = false }

Why kotlin can using a different name to call a function? I'm a beginner in Kotlin, I'm referencing a project that happened to see this code but did not understand its rules. Specifically, the first time, I thought parentFragment in line 78 was a variable but after that, I find out this is a function with name getParentFragment. I wonder why the IDE understands that parentFragment is getParentFragment function. This is where the parentFragment is used (full code here: <a href="https://pastebin.com/t5Rb8mb8" rel="nofollow...

Difference between launching app from recents and home screen I have ActivityA as launcher activity. From ActivityA I open -> ActivityB. I put the app in background. When I open the app from recents the app is resumed with ActivityB. When I open the app from homescreen, the app is resumed with ActivityA without calling onCreate(), just onResume(). Why is ActivityB cleared from stack when I open the app from homescreen, even if onCreate() from ActivityA is never called, and how to fix this? Manifest file looks like this: ActivityA:...

Missing notifications using AlarmManager I am facing a problem when scheduling multiple (up to 14) notifications using the AlarmManager. The problem is that the notifications are randomly missing (especially when the debug cable isn’t plugged). For example the first three notifications are triggered and after these notifications none of the scheduled notifications get triggered anymore, until you reschedule the notifications. It...

how to make first run dialog in kotlin? I'm trying to create a pop-up dialog that only displays after the first launch of the app, notifying the user of the app's consent to receive notifications. So I have a dialog like this class MainActivity : BaseActivity() { private var agreement = false override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) if (!agreement) { val notifyBottomDialogFragment:...

PKCS7 signature always fails to validate with Path does not chain with any of the trust anchors In both test and properties used same p12 and intermediate pem certificate. The test fails on validator.validate(certPath, params) with java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors AdaptableX509CertSelector.match: subject key IDs don't match. I did recheck, both certificates are there, both are the same which were added in signer, but the subjectKeyId is always a bit different from the original one. Fighting it already 2 days, need a fresh...

GlobalScope.launch doesn't finish its task inside runBlocking main function I don't understand why in the program below GlobalScope.launch instruction doesn't finish its task. I do understand that runBlocking has no control over GlobalScope and it's usually bad to use it, but that doesn't make me know why instructions inside GlobalScope.launch {} doesn't execute as expected. The code snippet: package coroutines import kotlinx.coroutines.GlobalScope import kotlinx.coroutines.delay import kotlinx.coroutines.launch import kotlinx.coroutines.runBlocking import...

Why does this error when I declared this properly? Here’s my “problematic” code which I slaved all night trying to make it work. I tried all types of variations of ArrayAdapters. I even tried ones online. package com.balut.testinggrounds import android.view.View import android.widget.AdapterView import android.widget.ArrayAdapter import android.widget.Toast import com.balut.testinggrounds.R import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.widget.Spinner class MainActivity : AppCompatActivity() {...

How to sort an array of dates, into a list of dates by week I have an array of dates [ { "date": "2020-11-24" }, { "date": "2020-11-25" }, { "date": "2020-11-26" }, { "date": "2020-11-27" }, { "date": "2020-11-28" }, ... ] I want to sort these into objects like; class SortedDateListings( private val title : String, private val dates : ArrayList ) I've toyed around with maybe getting the current week of the year, getting the first day of that week,...

Kotlin how to get to subcalss in sealed? I have a problem. I have a mutableListOf and this SomeProduct has in constructor selated variable like this : val basket = mutableListOf{ Produkt(KindofProcuct.Potatos, TypOfProduct.Bag(20)),

How to infer generic type from function parameter in Kotlin? I have a base enum like this enum MyEnum { val initialValue: T val minValue: T val maxValue: T } And I have a couple of methods like: protected fun setEngineValue(myEnum: MyEnum, value: Float): Boolean {} protected fun setEngineValue(myEnum: MyEnum, value: Int): Boolean {} I want to merge it into one function where the type of value is inferred from myEnum. I have done this in other languages like Typescript but I can not find a way to do it in Kotlin. Something like:...

Kotlin array return lambda instead of value I am new to kotlin and i noticed that when creating array if I used { } the return type is lambda instead of string in the following example val array1 = Array(26) { i->('a' + i).toString()} println(array1.joinToString(" " )) //print a b c d e f g h i j k l m n o p q r s t u v w x y z which work as expected but adding { } make it return lambda which is not expected output for me as in next example val array2 = Array(26) { i->{('a' + i).toString()}} println(array2.joinToString(" " ))...

Connect C++ class with Kotlin/Java class through JNI Is it possible to pass same class object from C++ to Java/Kotlin class object and vice versa through JNI. For example lets say I have this class in C++ class A { ... } class B { A a; } and in Kotlin class A { ... } class B { var a : A = A() // or smh } and in JNI JNI_METHOD(jobject kotlin_object_B) { B b; env->FillKotlinObject(kotlin_object_B, b); // or smh }

Transform Single&lt;List&lt;Maybe&lt;Book&gt;&gt;&gt; to Single&lt;List&lt;Book&gt;&gt; could someone help, please? I have these functions fun getBooks(): Single { return getCollections() .map { it.map(::collectonToBook) } } fun getCollections(): Single { return db.fetchCollections() .filter(::isBook) } fun collectonToBook(collection: Collection): Maybe { return collection.toBook() } The problem is getBooks returns Single when I need Single. Can I do that inside the stream without calling blockingGet?

How to copy file from app-specific folder (file:// scheme) to MediaStore Images collection (content:// scheme) in Android Q? I am trying to copy file from app-specific folder to MediaStore Images collection using this method: /** * Copies file from path of scheme

file://

to Uri of scheme

content://

* * @param fromPath Example: /storage/emulated/0/com.my.package/FILE/7225832726757260/wang-shaohong-Kh-NfgSYqN0-unsplash.jpg * @param toContentUri should be of

content://

scheme. Example: content://media/external_primary/downloads/1515 */ @Throws(IOException::class) fun copyFilePathToContentUri(fromPath:...

Upgrade to Kotlin 1.4 get error compiler about module-info.class I'm using Kotlin version 1.3.7 . So when I upgrade to 1.4.10 I get the compiler error Cause: cannot find META-INF.versions.9.module-info: module-info found in META-INF/versions/9/module-info.class Is there any help?

how to use 24 hours valid session id without generating new one in android kotlin I am developing an android app using tmdb api. In the api, I can create a guest session id that is valid 24 hours. Should I use this id for 24 hours or create a new session every time user enter the application? which one is a better choice. If I use the same session id 24 hours without creating a new one, how can I do this in kotlin? thanks for your ansers.

how can we create Soap Server in laravel and use that laravel wsdl url call for mobile app BackEnd create route generate WSDL file using zend soap of Zendframework in laravel 7 if(isset($_GET['wsdl'])) { // Create wsdl object and register type(s). $wsdl = new Wsdl('wsdl', $this->endpoint); foreach($this->types as $key => $class) { $wsdl->addType($class, $key); } // Set type(s) on strategy object. $this->strategy->setContext($wsdl); foreach($this->types as $key => $class) {...