Moving item in RecyclerView doubles item in view I'm building a contact list (ArrayList) in a messaging app using RecyclerView. When a contact updates, I want to move that user to the top of the list, while all other items in the list move one step down. I'm using a function with the following code within my Adapter: Collections.swap(myArrayList, fromPosition, toPosition); notifyItemMoved(fromPosition, toPosition); The list I have to begin with is: When I...

Problems with RecyclerView Search with Room Database Kotliin I have set up a Room Database in Kotlin that holds details of customers. This is then displayed in a RecyclerView with functionality to add, update and delete customers. I have been trying for some time to add the functionality to search the database and get the recyclerview to change to only including letters and numbers that match the data of customers. In Repository.kt I added a search function: @WorkerThread fun search(desc : String) : LiveData{ return...

Clarifications and Assistance with esptouch First of all i would like to say that the esptouch is a great Project and I will like to thank the owner and his team for the work. https://github.com/EspressifApp/EsptouchForAndroid As I would like to build a secured app to be able to tranfer the wifi-code to the ESP32 and then control it. To get the Wifi-code transfered, I was planning to base on the Esptouch open source code. Nevertheless I please...

Number of telephonyManager is manager in API level 26 val incomeNumber = intent?.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER) I was trying to get incoming call's number this way. But, EXTRA_INCOMING_NUMBER is deprecated in API level 26. So, I was looking for alternative of EXTRA_INCOMING_NUMBER I found this question. The answer was beautiful also....

Not allowed to make global variable I have made this class: class GlowMap(private val glowDeliveryInfo: GlowDeliveryInfo, private val supportMapFragment: Fragment, val context: Context) : OnMapReadyCallback { which i tried to make a object on like this in another class: var glowMap: GlowMap? = null And whenever i try to run i get this error: Execution failed for task 'appkaptHuaweiQaKotlin'. A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution java.lang.reflect.InvocationTargetException (no...

Kotlin KMM 'commonMain' dependencies: Running works, AndroidStudio shows errors I did set up a KMM project as described here: https://kotlinlang.org/docs/mobile/getting-started.html And I want to put some shared classes in the commonMain module. The classes require some dependencies. So I add the dependencies as describes here: <a href="https://kotlinlang.org/docs/mobile/add-dependencies.html#dependency-on-a-library-used-in-specific-source-sets" rel="nofollow...

ViewPager2 hides instead of navbar and statusbar I have a onResume function that looks like this in a AppCompatActivity: override fun onResume() { super.onResume() window?.decorView?.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or View.SYSTEM_UI_FLAG_FULLSCREEN// or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY server.serverRequest(MyServerRequestObject(), ServerCallback { runOnUiThread { this.viewPagerFragmentAdapter.addFragment(MyFragment.newInstance())...

How can I build a widget for my app (Kotlin) How do I make a widget for my application in android studio using Kotlin?

Null Pointer Exception on using getSerializableExtra I am using the same Activity to create and edit an Invoice. On using SetonClicklistener to create an Invoice I am just calling an intent. Whereas when I am trying to edit an existing invoice, I pass along the object using putExtra. The issue is the Activity does not launch when I click the fab button to create a new Invoice. I get a null pointer error... have spent a fair bit of time running in cicles on this... any thoughts? class EditInvoice : AppCompatActivity() { companion object {...

Not generating Jacoco report for android libs with Gradle wrapper 6.5.1 in android project? I have created a simple android project to demonstrate the issue. After updating gradle-wrapper for the android project, Jacoco does not consider unit tests coverage for android libs. Current versions: classpath "org.jacocoorg.jacoco.core0.8.6" classpath "com.android.tools.buildG4.1.3" classpath "org.sonarsource.scanner.gradlesonarqube gradle plugin3.1.1" Following are the Jacoco Reports for gradle wrapper 6.5.1 <a href="" rel="nofollow...

How to add fading edge effect to Android Jetpack Compose Column or Row? I need to implement LazyColumn with top fading edge effect. On Android I use fade gradient for ListView or RecyclerView, but couldn't find any solution for Jetpack Compose!

Unable to show menu items in Android toolbar I am using toolbar in place of action bar in my app. In toolbar I want to show menu items but unable to add them. Below is my code: menu.xml styles.xml @color/colorPrimary @color/colorPrimaryDark @color/colorAccent @drawable/splash #1e70ff false true MainActivity.kt class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

Android DialogFragment views not updating I am using a DialogFragment and onViewCreated is called, however the card views do not update their opacity. My code should disable and grey out the card view that is not selected, however nothing changes. I have tried placing the code in onCreateView instead but it does not work as well. class AddBookDialogFragment: DialogFragment() { override fun onCreateDialog(savedInstanceState: Bundle?): Dialog { return activity?.let { val builder = AlertDialog.Builder(it)...

Fragment Back Navigation Blocked by ViewModel so I'm trying to implement mvvm architecture with navigation component, this code snipet works just fine.. the problem is that when I navigate from fragmentA to FragmentB there is no way to go back, its like the button is blocked (If I remove the ViewModel the navigation works fine so it has something to do with the ViewModel). anyone have an idea of whats happening? private fun initVewModel() { myViewModel = MyViewModel() myViewModel = ViewModelProviders .of(this,...

withContext(Dispatchers.IO) keeps launching on DefaultDispatchers I am using Robolectric to unit test. I have a Worker that I want to launch on Dispatchers.IO In order to use my own dispatcher, I pass it as a parameter in the constructor. To do so, I use a Factory class CacheWorkerFactory(private val coroutineDispatcher: CoroutineDispatcher = Dispatchers.IO) : WorkerFactory() { override fun createWorker( appContext: Context, workerClassName: String, workerParameters: WorkerParameters ): ListenableWorker? {...

Kotlin exposed framowork I am new to kotlin exposed framework. What i want to achive i to order some result by length of column which is CLOB. The expression looks like that: ProductReviewTable.join( otherTable = ReviewTable, joinType = JoinType.INNER, additionalConstraint = { ProductReviewTable.review eq ReviewTable.id } ).join( otherTable = UserProductRatingTable, joinType = JoinType.LEFT,...

How can I use coroutines with CRONET so that my code can be written like sychronous? While there are many working Android code examples of usage of Kotlin coroutines and the network library Retrofit, there isn’t an example of the specific combination of Cronet with coroutines. will coroutine support cronet? Post Method Example: val myBuilder = CronetEngine.Builder(context) // Enable caching of HTTP data and // other information like QUIC server information, HTTP/2 protocol and QUIC protocol. val cronetEngine: CronetEngine = myBuilder...

How can FirebaseMessagingService class can trigger can trigger subclass's overrided function? I'm developing an SDK and want to develop a logic like Firebase messaging service. For example, if I add the MyMessageingService class which extends FirebaseMessagingService, inside the tags (in this case FirebaseMessagingService is a super class and MyMessagingService is a sub class) here my question arises. My question is how does firebasemessaging service trigger onNewToken function in subclass? As a result, what I want to do is to trigger a function of subclass in the application side...

ExoPlayer is not showing play/pause during video playback I am working on app that will play the videos using ExoPlayer. For some reason when I am trying to pause video player is not showing play/pause icons. I made a custom layout for only play/pause and set it on PlayerView. Playing/pause video with player.playWhenReady = true or player.playWhenReady = true. Can not find a solution anywhere, looks like I missing something but don't know what. custom_player_controller.xml I am using ExoPlayer inside RecyclerView, here is...

how can i read strings from multiple lines and print them out respectively? class MusicPlayer { private var songs: Array = arrayOf("") var index = songs.size fun add(track: String) { songs[index-1] = track } fun show() { for (item in songs) { println(item) } } } fun main(args: Array) { val m = MusicPlayer() while(true) { var input = readLine()!! if(input == "stop") { break } m.add(input) } m.show() } my inputs are

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(JAVA/KOTLIN) Can I "convert" a string to call an existing variable? like "varname".getvariable? Can I use a string to call an existing variable or object by name? The question is kind of abstract but I'm looking for something like this. Example var number = 5 var getnumber = "number" if (getnumber.(???) > 10) {...} or if ("number".(???) > 10) {...}```

Android Trigger when detects any noise I want to develop an android app using Java or Kotlin to trigger some action when detecting a noise. How the monitoring apps working ? I prefer to go with any native method development possibilities with android Support. Otherwise Is there any api or library we have to detect the noise and its level. Thanks in advance.

How to fix ActivityThread Fatal Exception: java.lang.RuntimeException? i got this crash in my firebase production application, i do not have any specific page in my project (ActivityThread.java), but crash happen here, how to handle this kind of crash or how to replicate this issue. Fatal Exception: java.lang.RuntimeException Unable to create service zedTarc.zig.zig.Seat.JobSchedulerService: java.lang.RuntimeException: android.os.DeadSystemException Caused by java.lang.RuntimeException: android.os.DeadSystemException at...

DJI SDK Andorid - Kotlin To whom it may concern, We are trying to use the DJI SDK in Andorid Studio and migrating it from java to Kotlin for Mobile Drone DJI Applications. We followed the instructions in: https://developer.dji.com/mobile-sdk/documentation/application-development-workflow/workflow-integrate.html We are getting the following crash and we don't exactly know...

How to change a String to Float modifying it's format in kotlin Android? I know it's kinda basic, but I have the next question: If I have a string number = "120.100,10" and I want to parse it to Float and change it's format to number = 120100.10, how can I do that? Is it possible? I'm using Kotlin language. Thanks.

repopulate recyclerview onQueryTextChange of searchView (with API call) I would like to display suggestions in recyclerView instead of embedded UI of the searchView (like on picture below) Suggestions are loaded from API call on each text query change of my searchView. Then, each time I receipt new suggestions, I'm executing an AsyncTask which populate the UI suggestions using Cursor class FetchSearchUserTermSuggestionsTask(var searchview: SearchView) : AsyncTask() { override fun...

How to convert image name to string after randomly selecting from folder I'm quite new to progamming. So here's my function to select a random image in my drawable folder. fun generateimage(index:Int) {var images=arrayOf(R.drawable.img1,....) main_imageView.setImageResource(images[index]) This works as an image is shown randomly every time I start the application. But I would like to be able to know which image was selected. Preferably from retrieving the image name to string.

Incomplete code with Elvis operator and addition in Kotlin I am learning Kotlin and I happened to write this: var nullTest: Int? = null println(nullTest?++ ?:0) Trying to compile and run, I get the "incomplete code" error. Same with: var nullTest: Int? = null println(nullTest?+1 ?:0) While if I use: var nullTest: Int? = null println(nullTest?.inc() ?:0) It compiles and runs correctly. Why is that so? Why do I have to use .inc() and can't I just use the + operator? Thank you

How to get Locale in Webflux Functional Endpoints? I am using Spring's Functional Endpoints with Kotlin to create a web service, and I'm trying to figure out the idiomatic way to resolve the Locale off using the standard Accept-Language header. Here's an example of what the code looks like: val repository: PersonRepository = ... val handler = PersonHandler(repository) val route = coRouter {...

Android MotionLayout doesn't show animation I am creating animation in splashScreen with motionLayout. But my animation doesn't work, instead it immediatly shows the ending positions of the elements on the screen. Here is my code: SplashActivity: class SplashActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_splash) motionLayout.transitionToEnd() val handler = Handler() handler.postDelayed( {...