Kotlin: how to get a background's color from Button class? I want to get Int value of background's color of a button. I try in this way originalColorOfButton = (button.background.mutate() as ColorDrawable).color but I get an exception of Java RunTime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.LoginActivity}: java.lang.ClassCastException: android.graphics.drawable.RippleDrawable cannot be cast to android.graphics.drawable.ColorDrawable How can I get that?

Using string interpolation to change imageView resource in Android studio Kotlin? We can change image by name using string interpolation in Swift. Is there a way to achieve this in Kotlin? Can we change selected image programatically in Kotlin? let image = UIIMage(named : "\(imageName)_selected")

Overlap Appbar with a button I need to figure out a way to overlap the app bar in my app to set a button. The button will be half on top of the appbar and half below it. How can I achieve it?

How to add fade effect to color selector I understand that we can add fade effect to drawable selector, I'm using this for a custom button, which gives the fade effect to the background. I also have a text color selector for the button, but I can't add the fade effect to it. Any idea how could I achieve the same fade effect on the text as well?

How do I disable dimming of my app when showing BottomSheetDIalogFragment? I'm currently developing an Android app in Kotlin in which I use a BottomSheetDialog Fragment. Whenever the dialog pops up, the rest of the screen is dimmed. Can I somehow disable this? I don't want to click the screen behind the fragment, I just want it to show up undimmed. Thanks in advance: XMl of the Fragment: Here is a picture of the app so you can see what I mean: https://imgur.com/u6MYYKW

Translate Kotlin code into Java - Understanding the Syntax I am looking to try to us this piece of code which thanks to Azimuth reading changes to opposite when user holds the phone upright I need to use this code to experiment in Java however i am unsure of how to translate the code below in to Java: override fun onSensorChanged(event: SensorEvent) { if (event.sensor.type != Sensor.TYPE_ROTATION_VECTOR) return...

How to replace user photo profile in kotlin with retrofit coroutines? let says i already have API to put the data.. and it works when i try in Postman.. the question is.. how to implement in android with kotlin? how to make Api service to replace/put/post the new image path? how to call the function to upload the file image to the server? and replace the path? thanks in advance... the fillable is : photo_id & photoprofile i have already tried this service : @Multipart @PUT("editphoto/{id}") fun updatePhoto( @Path("id") UsersId: String,...

Read Json structure with webclient get method spring boot 2.4.2 webflux I would like to read the json structure from a certain URL with the WebClient within a Kotlin spring boot application in the following way: @Component class UtmSwitchScraperApi @Autowired constructor(webClientBuilder: WebClient.Builder) { val webClient = webClientBuilder.build() suspend fun fetchUtmSwitchStruct(): Flux { val logger = LoggerFactory.getLogger(javaClass) val response: Flux = webClient.get() .uri("http://gbe.iis.company.net:20002/")...

Listening to network events by using registerNetworkCallback with PendingIntent What I want: when internet connection status changes from OFF to ON or vice-versa - I want to know about that immediately to stop/start a service even if the application isn't active. As pending intents may outlive the calling application, I think this is achievable. I'm trying to use ConnectivityManager.registerNetworkCallback, the overloaded version taking PendingIntent, this way: There is a broadcast receiver NetworkStatusReceiver that is supposed to receive intents related to network...

error calling a button from MainActivity file By any chance anyone knows why I may be getting an error in my MainActivity file when I try to call a button; I already gave it an id in the activity_main file, can anyone help me shed some light on this please, id in activity_main is "btnDatePicker" By any chance anyone knows why I may be getting an error in my MainActivity file when I try to call a button; I already gave it an id in the activity_main file, can anyone help me shed some light on this please, id in activity_main is...

Collection size extension funcion I'm trying to implement a extension function which if the collection size is bigger than some value it runs some code block but I get this error in the Collection part: Type parameter cannot have any other bounds if it's bounded by another type parameter the code: fun C.ifBiggerThan(size: Int, execute: () -> R): R where C : Collection, C : R = if (this.size > size) { execute() } else { this } Any suggestions?

I have problem when I want to customize my new button in Kotlin i have this error in my code when i will create myButton in kotlin

Empty KMM project is stuck with gradle sync I am trying to move some business logic from my iOS apps to KMM. I have already made some job when suddenly started having problems with studio. It was not building, there were weird metaspace errors, etc. I was beating around my project for several hours and days to be honest - no result. I decided to completely uninstall studio and all its dependent files. After that I'm not even able to properly build an empty KMM project. Simple Android projects work just fine. Problems occur only with...

Serializer for class 'LightData' is not found - serializerNotRegistered I have had serialization working but not any more. The following error is produced with either encode or decode functions. kotlinx.serialization.SerializationException: Serializer for class 'LightData' is not found. Mark the class as @Serializable or provide the serializer explicitly. I cant see what I am doing wrong, @Serializable is there. Any help gratefully received. package com.example.test11 import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import...

Cannot load resources in JUnit test Getting an error while running a JUnit test. It looks like it's failing to load resources, but why? The fragment appears on screen, but then the test runner immediately crashes. E/System: java.io.FileNotFoundException: /data/user/0/com.myapp.debug/cache/DhclPoXg.jar (No such file or directory) at java.util.zip.ZipFile.open(Native Method) ... at java.lang.ClassLoader.getResources ... at androidx.test.core.app.ActivityScenario. ... at...

Can't update an Entity in Room Kotlin I need to update an entire entity, so I tried with @Update but it doesn't work, And with the UPDATE query there are too many fields. So what could I do? @Update updatePackage(item: Package) @Query("UPDATE PackageEntity SET weight = :weight ...[[TOO MANY FIELDS]] WHERE id = :id")

fragment recyclerview dissapear after navigating up kotlin java This is the basic configuration of an App Im developing. This App has two fragments FirstFragment and SecondFragment contained in a

Could not find colorpicker-0.0.13.aar (com.github.QuadFlask:colorpicker:0.0.13) Execution failed for task 'appcheckDebugAarMetadata'. Could not resolve all files for configuration 'appdebugRuntimeClasspath'. Could not find colorpicker-0.0.13.aar (com.github.QuadFlaskcolorpicker0.0.13). Searched in the following locations: https://jitpack.io/com/github/QuadFlask/colorpicker/0.0.13/colorpicker-0.0.13.aar Possible solution: Declare repository...

Play sound in background thread issue I have an app that in an activity i do heavy animations and play sound i used the below code to play the sound var musicThread:Thread? = null fun playSound(sound:Uri) { musicThread = Thread(Runnable { try { sharedPlayer.reset() sharedPlayer = MediaPlayer.create(MyApplication.appContext,sound) sharedPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); // sharedPlayer.prepare()...

What different between Set and Delegates.observable in Kotlin I think both of Set and Delegates.observable is very similar. Except Set use field and Delegates.observable use 3 property. It's my code for example. private var club: Club? = null set(value) { field = value more.isVisible = (value?.presenterId == presenterId) } private var club: Club? by Delegates.observable(null) { _, _, new -> more.isVisible = (new?.presenterId == presenterId) }

Kotlin: Passing data to fragment I have a fragment which holds a RecyclerView. Through this RecyclerView, I want a click to any of the views to open another fragment (which holds a different recycler view). Each view of the RecyclerView holds a picture URL and some text. I want both of these to be passed on to the second fragment so that I can use it in a ImageView and TextView. I've managed to open the second fragment with the RecyclerView adapter but I'm having difficulty passing on the data from the RecyclerView to my...

intent.putExtra from Activity to fragment returns null I am trying to get a string from 1 activity to another, and then get that string from the second activity to the Fragment inside of it. I am getting null return from the fragment. This is the code for each of the following. Activity 1 findViewById(R.id.button).setOnClickListener { val intent = Intent(this, MainActivity::class.java) intent.putExtra("IPValT", IPVal) startActivity(intent) Activity 2 var IPVal2: String =...

How to filter a list by using the ids of another list? I have a list of ids. I want to filter my list and only keep the values in that list that match the id. fun filterHelper(ids: List, list: List) { list.filter { ids.contains(it.id) } } But this is very inefficient. It is essentially traversing the list O(n^2). Does Kotlin let me do better?

Linkify with Compose Text I can't find how to linkify my Text() using Jetpack Compose. Before compose all I had to do was: Linkify.addLinks(myTextView, Linkify.EMAIL_ADDRESSES or Linkify.WEB_URLS) And all the links contained in my TextView were becoming clickable links, obviously. Important: The content of the Text is coming from an API and the links do not have a fixed position and content may contain multiple links. I want to keep this behavior with using Jetpack Compose but I can't find any information about doing...

How to generate marker array in Kotlin I have 2 separate location data and I need to make array of them (I guess I need to make array of them, maybe you have better idea!) in order to add marker for both locations in google map. Code Locations part are commented override fun onMapReady(googleMap: GoogleMap) { mMap = googleMap // Try to obtain the map from the SupportMapFragment. if (ContextCompat.checkSelfPermission( requireContext(), android.Manifest.permission.ACCESS_FINE_LOCATION )...

Android recording video in Backround I am developing a Kotlin android app, when something happens in the app, I want the front-facing camera to record in the background to capture a users reaction for 5 seconds then storing the video in an object to be used in another feature, leaving the apps activity will break it so i am wondering is it possible to do this in the background? Thanks in advance

Kotlin - Set layoutDirection to linearlayout error binding I have implemented data binding in xml and I want to set layoutDirection to my linearlayout, but it causes error like below. Here is my code This is the error

Sending request via LAN? I am trying to execute an ip with my command (e.g. 192.168.0.2/toggle) and it would send over the command to a device that I have. However, I am unable to execute the ip with the command itself. My code is below. var i = 1 LockButton.setOnClickListener { if (i == 1) { Toast.makeText(this@MainActivity, "Locked!", Toast.LENGTH_LONG).show() val connection: URLConnection = URL("Https://" + ipcomm2).openConnection()...

Moshi jason adapter with generic type I want to use a Moshi adapter with a generic type. Here is my generic type adapter code, fun getObjectFromJson(typeOfObject: Class, jsonString: String): T? { val moshi = Moshi.Builder().build() val jsonAdapter: JsonAdapter = moshi.adapter( typeOfObject::class.java ) return jsonAdapter.fromJson(jsonString)!! } This code is not working. It is throwing an error, Platform class java.lang.Class requires explicit JsonAdapter to be registered But, If I don’t use a generic...

initliaze and use viewbinding views by kotlin lazy delegate making view making view not inflate properly after first inflate So i am migrating my code from Kotlin Synthetic to ViewBinding but when i write ViewBinding code its so much boilerplate like the first assign all views as lateinit var to use them in the whole class and then initialize these views in onViewCreated so then i use by lazy delegate to overcome that issue and everything work fines but when i try my app and it is single-activity-architecture based so when i go from Afragment to BFragment and then come back to AFragment some views like (toolbar not...