JobIntentService? or IntentService with ForegroudService? or both? for Locationtracker + Timer What i want: Building an app which tracks the location and the time in background for backpacking. The app should track the location and the time in background. Question: which one shell i use: JobIntentService? or IntentService with ForegroudService? or both? My resume: (after reading a lot of explanations) JobIntentservice: will approximately STOP after 10 minutes(because of the JobScheduler)! IntentService: will STOP, if the app is killed! Am I wrong? I would appreciate some help! Thank you

moxy and dagger2 dependency injection problem I'm new in android development and i'm trying to use Moxy and dagger 2 together. I want to inject my presenter into avtivity according to the moxy's documentation. But I got an error lateinit property daggerPresenter has not been initialized because it's null. Here is my Activity code: package com.example.simpledictionary.activities import android.os.Bundle import android.util.Log import android.view.Menu import android.view.MenuInflater import androidx.appcompat.widget.SearchView import...

with Kotlin, can you convert a Google Storage URL (GS://) to HTTPS? In trying to use Glide and Picasso i have seen that they require a HTTPS:// string input. i have tested and it works fine. But if I use a GS:// which you get from a Storage Reference then the image does not load. Is there a way to convert a GS:// to a HTTPS://? if this is not the correct way to be reading from firebase storage then how am I meant to retrieve the image from firebase?

Start animation in Kotlin I'm trying to implement some animations in my Floating Action Button. These are the one I've inside my animation directory: var fab_open = AnimationUtils.loadAnimation(context, R.anim.fab_open); var fab_close = AnimationUtils.loadAnimation(context,R.anim.fab_close); var rotate_forward = AnimationUtils.loadAnimation(context,R.anim.rotate_forward); var rotate_backward = AnimationUtils.loadAnimation(context,R.anim.rotate_backward); I set up that, on button click, these animation must start. I...

How to use onCharacteristicWrite() for BLE in Kotlin? I'm implementing a small BLE app and I have a list of devices and I want to turn them off when I press on them in the list view. My service UUID is:0xFFB0 My characteristic UUID is:0xFFB7 Write with response/ Read with response Characteristic format: Byte order ; 0 ; 1~19 R/W ON/OFF ; - 0x01 -> ON and 0x00 -> OFF I managed to find and connect to 1 device, but I can't manage to trigger onCharacteristicWrite(). I'm missing a part of the BLE flow or? Can someone explain it to me?...

Why can I get the same result when I change the order of the first yield or remove the second yield? I'm learning the Coroutines of Kotlin. The following code is from https://kotlinlang.org/docs/reference/coroutines/exception-handling.html 1: I get the same result when I change the order of the first yield, why? You can see Image A1 and Image A2. 2: I get the same result when I remove the second yield, why? You can see Image B. Image A1 <a...

Any reason why Kotlin API GET REQUEST code (OKHttp library) get this; java.lang.NullPointerException? MainActivity class MainActivity : AppCompatActivity() { lateinit var adapter: MainAdapter override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) recyclerView.layoutManager = LinearLayoutManager(this) fetchJson() } private fun fetchJson() { println("Attempting to FetchJson") val url = "https://www.noforeignland.com/home/api/v1/places/" val request = Request.Builder().url(url).build()...

the recyclerView does not appear kotlin I have a recyclerView with 10 elements. My main objective is to click on an item in the list and knowing what is the position of list. I implements the code below but when i compile the recyclerView does not appear. MainActivity.kt class MainActivity : AppCompatActivity(), PeopleInStarWarsAdapter.OnNoteListener { private lateinit var dataPeopleAdapter: PeopleInStarWarsAdapter private var listDataPeople = ArrayList() override fun onCreate(savedInstanceState: Bundle?) {...

Android Kotlin change multi-language How can I change language realtime? Because in this image when I want to change need restart activity.

How to use lambda in kotlin for anonymous inner class replacement I need your help with my kotlin code below (save as Fun.kt) import javax.swing.* import java.awt.* import java.awt.event.* class Amir { fun addActionListener(m:ActionListener) { } } fun main() { //SUCCESS val btnLambda=JButton("LAMBDA") btnLambda.addActionListener(){} //FAILED val mahmud=Amir() mahmud.addActionListener(){} } myquestions is, why this line is succeeded when compiled: btnLambda.addActionListener(){} but this line is failed:...

Android Kotlin Room Type Converter for JSON Array I know there's a lot of other post regarding type converter, but I am facing a different scenario here. What's different is actually the Json format that I am receiving from my server, and I cant ask them to update their format just so I can fix this issue. I know Im just missing something or just doing it wrong Here's my sample Json format [{"name":"John","age":30,"cars":["Ford","BMW","Fiat"]}] The cars format is not object, but JSON Array, and I kinda want to store it under List...

Does the Kotlin Fold Function require type casting or specifying lambda type? I am looking at the documentation for the Kotlin fold function and am having a bit of difficulty understanding what is going on. The example they provide is as follows: val fruits = listOf("apple", "apricot", "banana", "blueberry", "cherry", "coconut") // collect only even length Strings val evenFruits = fruits.groupingBy { it.first() } .fold(listOf()) { acc, e -> if (e.length % 2 == 0) acc + e else acc } println(evenFruits) // {a=[], b=[banana], c=[cherry]} They say there should...

How to set value limit in edittext 0 to 300 i want to set value limit in edittext not character limit in edit text. like when i enter 100 it is entered or set max length 3. when i enter 30 it set max length 2 when i enter 4 then set max length 2 when i enter 2 then set max length 3 these all about number but in decimal(.) can't be enter first time or it can't be enter twice and after decimal it contain 2 value. example 100.00 entered 200.00 entered 30.745 not entered(set max length 2 after decimal) Edit text code...

how many LiveData do I need to have in my repositoy if I get data from 3 different rest API? say for example I have restaurant object. I have 3 different activities one activity to show list of top recommended restaurants one activity to show list of search result restaurants one activity to show list of visited restaurants so I have 3 different endpoint from backend that I will fetch using retroft. those 3 endpoints will give me restaurants data, same POJO so for those 3 activities, I need to make 3 different viewmodels, and I will have 1 repository right ? my question is, how...

How to use a view's reference in xml to pass arguments to a function using data binding? I am using data binding to call a function of my viewmodel but the function requires the values of the edittext. But I don't know how to pass the value of other views. Here is the xml code. In this I want to pass the value of password edittext to viewmodel on click of the button. Suggest me a way to do this other than using onclickListeners in fragment and calling the function from there.

Android notification vibration not working I am trying to set notification but something gone wrong when I set vibration for my notification. Even though it still shows notification there is no vibration. I have already added user-permission, android.permission.VIBRATE in manifest here is the code, class MainActivity : AppCompatActivity() { lateinit var notificationManager: NotificationManager lateinit var notificationChannel: NotificationChannel lateinit var builder: Notification.Builder val channelId =...

How to show Material Date Picker? How to show Material Date Picker ? I've try use Material Date Picker in Fragment. But, not work class InfoPribadiFragment : BaseFragment() { override fun getLayoutResId(): Int = R.layout.fragment_info_pribadi override fun onActivityCreated(savedInstanceState: Bundle?) { super.onActivityCreated(savedInstanceState) datePicker() } private fun datePicker() { val builder = MaterialDatePicker.Builder.datePicker() val materialDatePickerDialog =...

Why do I still need to add job.join() after I have used runBlocking in Kotlin? I'm learning the Coroutines of kotlin. The Image A can get the correct result. I think I have used the code runBlocking, and main function will keep runing until it get final result, but Image B failed, why? Image A Image B

Testing android MediaBrowserService I have an app I wrote using google's documentation and as a result I am using MediaBrowserService and followed most of hte instructions from it. Now I am trying to write tests for the service but I have never written tests before for any project of mine and I cannot make heads or tails of where and how to begin. My app currently has a problem of the repeatMode in Exoplayer not being changed when requested from the UI and I want to catch that problem with my test. package...

value cannot reassigned in recyclerviewadapter? I am developing new Android app but I am getting following error warning below below my TopHeadlinesAdapter.kt where I am getting red error warning class TopHeadlinesAdapter( val context: Context, var articleList: List ) : RecyclerView.Adapter() { companion object { const val urlKey = "urlKey" } lateinit var binding: NewsListBinding fun...

Quarkus - Reactive file download Using Quarkus, can somebody give an example on how the server and client side code using a reactive API to download a file over http looks? So far I tried to return a Flux of nio ByteBuffers but it seems not to be supported: @RegisterRestClient(baseUri = "http://some-page.com") interface SomeService { // same interface for client and server @GET @Produces(MediaType.APPLICATION_OCTET_STREAM) @Path("/somePath")...

Kotin - how to save get response into CSV file I need some help - how I can save all response into CSV? Thank you in advance for help fun main() { val url = URL("https://009co.com/ads.txt?utm_source=adstxt.com") with(url.openConnection() as HttpURLConnection) { requestMethod = "GET" inputStream.bufferedReader().use { it.lines().forEach { line -> println(line) } } } }

Unable to acess kotlin js from javascript I'm facing the issue where I'm not able to call any kotlin js function and getting 'something' is not defined. I've tried compiling project with gradle but ended up following this tutorial and compiling with npm. I attached my project here html...

Exception Handling with Spring Boot without REST I use Spring Boot 2.1.13.RELEASE with Kotlin I'm implementing a service, that supports only MQTT without REST. What I need: if exception is thrown, then log it in the console and wait till the next MQTT message comes. build.gradle.kts: // spring boot implementation("org.springframework.boot:spring-boot-starter-web") // kotlin implementation("org.jetbrains.kotlin:kotlin-reflect") implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")...

EditText force textDirection to ltr doesn't work, can any body advice? I have an edit text field, which I need to format every word to hashtag Example if I type ABC it should be formatted to #ABC I’ve implemented it with input filter but I’m not able to manage it when user enter Arabic text, #abc# مرحبا #مرحبا appears like this, I assume I can solve the problem if I can force the EditText android:textDirection="ltr", but even after this change android EditText behaving rtl when input is Arabic text. So my question is, how to force an EditText to...

BLE improve permission check for ScanCallback() in Kotlin I'm working on a small app with a BLE device. Sometimes the scan callback works fine and I can find the device but other times the scan callback doesn't work and I was wondering if there's something wrong with my code or if there's a problem with my permission check. Here's my code: override fun onCreate(savedInstanceState: Bundle?) { if (!isBLESupported(this)) { Toast.makeText(this, "This device doesn't support bluetooth", Toast.LENGTH_SHORT).show() finish() } else...

media recorder release causes UI freeze on api level 23 My MediaRecorder causes the UI to freeze when release() is called. this bug occurs only on api 23 and less. I've tried putting it inside a runnable and caching ever exception. I've followed the documentation and several guides online but the UI still freezes on release(). there is no error in the log trace which makes this bug even weird this is my code: fun startRecord(path:String) {audioRecorder = MediaRecorder().apply { setAudioSource(MediaRecorder.AudioSource.MIC)...

Kotlin : How to assign the value entered in textinputlayout to a variable using addTextChangedListner in android Hi I am trying to get the user entered value assigned to a variable using addtextchanged listner. But I am not sure how to do it. Here is my code to get user input: holder.editText!!.addTextChangedListener(object : TextWatcher { override fun afterTextChanged(s: Editable?) { } override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) { } override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int)...

Error at build.gradle android after adding target jvm I receive such error: Duplicate class com.tinder.scarlet.Deserialization found in modules jetified-scarlet-core-0.1.10.jar (com.github.tinder.scarletscarlet core0.1.10) and jetified-scarlet-core-0.1.10.jar (com.tinder.scarletscarlet core0.1.10) I started receiving this error after adding these lines: kotlinOptions { jvmTarget = '1.8' } to my android scopes at build.gradle. All these actions were made for solving this problem: Cannot inline bytecode built with JVM target 1.8...

Content provider permission issue? I have two apps App A and App B App A - have a provider for doing something and I have limit it with a self defined permission App B - will call the provider provide by A, I also add the self defined permission in AndroidManifest. I encounter a strange situation, if I install B before A, B app will crash and have exception java.lang.SecurityException: Permission Denial:opening provider (XXX provider) requires (self defined permission). But if I install A before B, there have no crash....