Kotlin reflection with coroutines I need to call the method suspend fun insert(e: T) by reflection declared as follows: interface IMutableDao { @Insert(onConflict = OnConflictStrategy.ABORT) suspend fun insert(e: T) @Update suspend fun update(e: T) @Delete suspend fun delete(e: T) } I tried with: val insertFun = IMutableDao::class.functions.find { it.name.equals("insert", true) } insertFun!!.callSuspend(dao, o) But I get the exception "Callable expects 3 arguments, but 2 were...

How to add items to a spinner from firebase realtime database Im trying to pull categories from a firebase database and add them to a spinner so the user can select the category that they want in the app but the problem is when the app runs the spinner is created with an empty list at first and after values when they are retrieved from the database are added to the spinner which means they are not interactable, they show up when you press on the arrow and a dropdown list of all the categories appear but when you press on one nothing happens. i'm not...

Android TextView HTML formatted string set problem I have a HTML formated string and I want to set this string to a TextView as attributed string. my String is, Lorem IpsumDolor Sit Amet. I am trying to use this method to set string to TextView, textView.text = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { Html.fromHtml("", HtmlCompat.FROM_HTML_MODE_LEGACY) } else { Html.fromHtml("") } but, it fails and TextView displays all html tags instead of...

Google Play Services doesn't work on Huawei devices when in IDLE mode We tried wake_lock, we tried to switch from Transition API to Activity Recognition API, we tried to get update via IntentService and BroadcastReceiver, but the problem remains when the phone goes offline(no wifi and no Mobile data) and the screen turns off. In this case our application stops receiving information from the API(onHandleIntent if we work with IntentService or onReceive if we work with BroadcastReceiver is never started). We also test with Huawei Y6S EMUI 9.1 phone but the...

KOTLIN - Access binding-Objcect and iterate over props to access all my custom Buttons Hellow there fellow humans, I am currently facing Kotlin Syntax gaps... My goal is to iterate over the GameFragmentBinding object and access all the buttons which are of type AreaView (my custom Button subclass) and I want to add the clicklistener as in below example in a for loop .... I found the option of using Kotlin reflection to access the binding objects attributes, but I am unclear on how to use the object in the loop to set the clicklistener on each button (something with the button...

Saving Keys securely in Android without hardcoding key in Code I'm currently saving keys in Gradle file buildConfigField "String", "SECRET_KEY", '"XXXXX"' During security testing, vulnerabilities were found. One of these vulnerabilities were saving the keys in gradle Now I'm planning to keep these keys in Keystore. But the challenge here is I don't want an API to fetch keys and save these keys in Keystore or Hardcoding these keys in code and push to Keystore :P Is there any mechanism that allows while building Application, Save these keys in Android...

How to define letterSpace dp in the Kotlin code (programmatically)? I have a material customButton and I want to give it a letterSpace in the code part. The letterSpace value is = 0.38dp. I have tried this but this is not gives the result that I want: class KycButton : MaterialButton { constructor(context: Context?) : super(context!!) constructor(context: Context?, attrs: AttributeSet?) : super(context!!, attrs) constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super( context!!, attrs, defStyleAttr...

Does a backing property created for only public properties? First of all I read the link: Backing Fields I am not sure I understand from the link, although I saw an example: Backing Properties will a backing field be created for a non public property?

Taking screenshot in a Background Service I am trying to make a bubble app that takes screenshot of other apps. I found this project link with a media projection sample but the images are not been saved to the device. is there a way i can save this image to the device or is there any other way i can take a screenshot with my app in a background service.

Android Studio Fatal Exception MAIN When I try to start my program, I get this message: 2020-12-04 144519.691 12612-12612/de.thm.ap.recordclean E/AndroidRuntime: FATAL EXCEPTION: main Process: de.thm.ap.recordclean, PID: 12612 java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) Caused by:...

Use fold to find the mode of any list in Kotlin Is there a possible way to find the mode from the fold? Code var numbers = listOf(9,3,7,6,6,6,11,11,6,3) var answer = numbers.fold().... Output 6

Ultrawide camera not showing up in CameraManager#getCameraIdList and CameraCharacteristics#getPhysicalCameraIds I want to make an app that records video using the ultrawide camera. I am using ASUS ROG Phone II. CameraManager#getCameraIdList only gives me "0" and "1", which are the main front camera and the selfie camera. CameraCharacteristics#getPhysicalCameraIds of the front camera gives an empty array. CameraInfo#getZoomState().getValue().getMinZoomRatio() is 1.0, plus my phone is just Android 10 so CameraControl#setZoomRatio() with value < 1.0 won't work. The GCam mod for my phone model does support...

How to get notification from a library I have android app "A" and android app "B" now i want to integrate library in both app , when ever i will send notifications both app should get notification. my question is how to create library by which both app will receive notifications

How can I create a button with an image next to text? I would like to make following button in Android. How can I do this? I have tried background but this makes the image under the text. It should be exactly like in the picture. Thanks!

How to add header using interceptor in micronaut I use micronaut and kotlin. So I trying to add header to request to other service using interceptor. Can you give me example?

How to create CPointer of primitive data type in Kotlin/Native? Allocating and obtaining a pointer of a struct is quite simple: memScoped { val str: StructType = alloc() val strPtr: CPointer = str.ptr } But I'm struggling to allocate or get pointer of the Int, UInt, Long, ULong and other primitive data types. Searched a lot, but there seems no documentation for this. Any help is greatly appreciated :)

Kotlin aggregate consecutive list elements I'd like to sum up consecutive numbers in a Kotlin list. If the list has a 0 then it should start summing up the numbers after 0. The result would be a list of sums. Basically sum up until the first 0 then until the next 0 and so forth. For example: val arr = arrayOf(1, 2, 0, 2, 1, 3, 0, 4) // list of sums = [3, 6, 4] At the moment I got it working with fold: val sums = arr.fold(listOf(0)) { sums, n -> if (n == 0) sums + n else...

Change hint programmaticaly with kotlin for material.textfield I am trying to change the text hint inside a material.textfield for example: I have a view model that has a live value: private val _cardMm = MutableLiveData() val cardMm: LiveData get() = cardMm init { _cardMm.value = "ΤΕΜΑΧΙΑ" } Now I want to change it inside it view model and observe it from main fragment with following code: viewModelAddBarcode.cardMm.observe(viewLifecycleOwner, Observer { binding.textField.hint = it }) The error I get in Logcat is:...

SQS all message goes to dead letter queue I've configured an SQS queue and an additional dead letter queue. I use the below handler to process my messages. @Introspected class LegacyToModernRequestHandler : MicronautRequestHandler() { private val logger = KotlinLogging.logger {} override fun execute(input: SQSEvent) { input.records.forEach { handle(it) } } private fun handle(message: SQSMessage) { val key = message.body logger.info { "LegacyToModernRequestHandler($key)" }...

My parent bitmap doesnt contains inner bitmaps design drawn by canvas in android My scenario is iam designing design for print using,using my customview to load that canvas.In my case i have created multiple inner canvas and bitmaps inside parent canvas so iam created parentcanvas from activity and attached with one parentbitmap,using my customview to load that canvas.In my case i created multiple inner canvas and bitmaps for it inside parent canvas and designed each section by section with startpositon for each section,at the end i got my design on ui but while...

Restrict Value Range after decimal in Kotlin Android I want to restrict value in range after decimal which check that number is not more than at specific value. For example my range is .20. Before .20 all acceptable like .19,.18... and value after range is not acceptable like .21,.22 ..... Also we need to check that if user enter first digit value as '.3' and after again entered second digit like user press 2, so .32 is bigger than your limit so the next digit not visible. Only want to visible .3. Does any one know how to achieve this...

Missing classes in activity_main.xml I'm completely new to Kotlin and want to learn how to code basic Android apps. So I wanted to follow some tutorials but after starting a new project with the 'Empty Activity' template in Android Studio the entire code in the activity_main.xml turns red. It says: Class referenced in the layout file, androidx.constraintlayout.widget.ConstraintLayout, was not found in the project or the libraries I have no idea how to fix this. The solutions I found online did not help at all. I tried...

Android ViewPager from custom library Bug I learning, how to create a android library and I create a simple onboarding Library. But I have a problem with my ViewPager from my custum module. When I swipe in right and left, my seconds item is not display or first and second view is overlay. I don't understand where the problem comes from <a href=""...

Squareup okhttp is causing errors I am total newbie to android studio and java. I am attempting to build an enhanced mms/sms app starting with open source project on github called qksms. I imported qksms from github which has dependencies from squareup okhttp. When i run the app... The built output shows the following warnings and errors. the errors are my immediate concern. WARNINGS: The 'kotlin-android-extensions' Gradle plugin is deprecated. Please use this migration guide (<a...

LayerList resource not found? I want to make a splash screen with this layout resource, it says it's not found. I tried rebuilding the project, using different images, cleaning the project, didn't work. I do have that image in my drawable folder. The app immediately crashes regardless of version android.content.res.Resources$NotFoundException: File res/drawable/splash_icon.xml from drawable resource ID #0x7f08009c at...

AndroidStudio: Explode animation doesn't work when i set background color to the root layout in the xml I don't know if it is a bug or i am making some mistake but when i set Explode animation when opening an Activity it animates like a Slide animation from top to bottom. I did some trial and error and it turns out that when i use a custom background color in the root layout in the xml file this unexpected behavior occures. When i remove the background color everything works as expected. Can anyone tell me what's going on here??? Because it is important for me to set background color in the...

Android + Firebase: Storing user comments in firestore Imagine you have a “Posts” model in firestore which has image, description, rating, comments etc. You want to display 10 or 15 comments when the post is clicked by user. Question is: Would you store comments in “Posts” model as a field or would you create another new data model “Comments” for that? In the first situation i wonder how to handle if the post has 1.000.000 comments? you can’t paginate a field as far as i know. Each time you need to fetch all of the comments and its kinda heavy...

Unmarshall Parcelable created by @Parcelize I have a set of classes that implement Parcelable and are annotated by @Parcelize. These classes are serialized to byte arrays like this: return Parcel .obtain() .let { parcel -> writeToParcel(parcel, 0) // "this" is the Parcelable object parcel .marshall() .also { parcel.recycle() } } And I want to create a generic deserialization method to create an instance of class from a byte...

Bottom Navigation bar is not showing up and when I try login app crashes I am getting the following error message on my activity_main and it is not loading up my bottom navigation bar. java.lang.NullPointerException at androidx.core.view.ViewCompat.setImportantForAccessibility(ViewCompat.java:1119) at com.google.android.material.bottomnavigation.BottomNavigationItemView.(BottomNavigationItemView.java:104) at com.google.android.material.bottomnavigation.BottomNavigationItemView.(BottomNavigationItemView.java:87) at...

Custom Qualifier In Xml Config Is Not Recognized I am trying to understand Spring's Custom Qualifiers. In an attempt to do so, The following example is being used private const val XML = "conf/_01_ioc_container/_09_annotation_config/_04_qualifiers/_01_09_04_02.xml" object Classes { @Target( AnnotationTarget.FIELD, AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_SETTER )...