I need a button to change to two different colors when clicked Here is my code and I need a comparison function to replace true so it can set different colors. I've tried getBackground() with many errors and I have tried other options on Stack here with no success. private fun makeColored(view: View) { when (view.id) { R.id.box_one_text -> if (true) view.setBackgroundColor(Color.DKGRAY) else view.setBackgroundColor(Color.WHITE)

how boost audio like vlc player android java when i use this code it will get the default maximum volume but i want to increase it like 'vlc' 'mx' player val mxVolume = 0 val maxVolume = am!!.getStreamVolume(AudioManager.STREAM_MUSIC) it will return default 15

`string index out of range 0` how to resolve it? The toCamelCase function takes in any kind of string and converts it into camelCase or Pascal case; fun toCamelCase(str:String): String { var ans: String = str[0].toString() for(i in 1..str.length - 1) { if(str[i] != '-' && str[i] != '_' ) { ans += str[i] } } return ans } But the code above produces the following error String index out of range: 0 I am a novice so please help me understand. Edit: This piece of code worked out without any error in...

Firebase Realtime Database and Kotlin Coroutines I am a beginner and currently working on an android app (Kotlin) that gets data from TMDb API and uses the Firebase Realtime Database for storing and retrieving data. I use Kotlin Coroutines to get data from TMDb API but I am not sure if I should use coroutines for storing or retrieving data from Firebase Realtime Database. I am hoping that Firebase automatically does the work done by...

How to get tranlationX and translationY from AnimatorListener on animationEnd? p0.toString() method gives: D/TAG: onAnimationEnd:AnimatorSet@4a04036{ translationX: 10.0 1138.7 translationY: 300.0 364.0 } How can I get translationX and translationY from p0?

How to connect firebase with login and sign-up activity in Android studio using kotlin? PLZZ HELP. PLZZ show all code snippets you guys will be using .

Parse key value pair using retrofit { "result": "success", "response_code": 200, "message": "data list", "data": [ { "Assigned": "14", "Closed": "150", "Escalated TTO": "102", "Escalated TTR": "2", "New": "44", "Pending": "4", "Resolved": "14" } ] } Above is the response that i want to parse, but i dont want to create a static POJO for it. The model should be dynamic so that even if there is another key-value...

How to add date picker dialoge in kotlin calendar = Calendar.getInstance() y = calendar?.get(Calendar.YEAR) m = calendar?.get(Calendar.MONTH) d = calendar?.get(Calendar.DAY_OF_MONTH) var dialog = DatePickerDialog(applicationContext, DatePickerDialog.OnDateSetListener { picker, i, i2, i3 -> },y!!,m!!,d!!)

How to do the parse step in ANTL4 I've generated the relevant Java classes given a lexer.g4 and parser.g4 file I've written a visitor, but in order to use the Visitor, i need an actual parse tree, how do i get the parse tree from the parser? In other online examples, there's mention of parser.parse() but that doesn't compile under ANTLR4 class Visitor : PostgreSQLParserBaseVisitor() { override fun visitSelect_stmt(ctx:...

Videoview frames are overlapping on Nexus 5x I have videoview on viewpager. On swiping page videoview frames are overlapping.This issue is only on Nexus 5x. On other devices its working fine. videoView?.setZOrderMediaOverlay(true) I tried above solution but its not working. Any help would be appreciated.

Proto DataStore - Nested Types Okay so I've been experimenting with Proto DataStore in Kotlin, and I have one issue. I'm using the following .proto file: syntax = "proto3"; option java_package = "com.example.protodatastore"; option java_multiple_files = true; message Person{ string name = 1; int32 age = 2; message Address{ string street = 3; int32 number = 4; } Address address = 5; } This is my Serializer class: class MyPreferencesSerializer: Serializer {...

Hide Navigation Drawer in certain Fragments I build an app which has a login screen and the home screen. I am following the single activity design principle. I have implemented the Navigation drawer like this. This is my MainActivity class MainActivity : AppCompatActivity() { private lateinit var drawerLayout: DrawerLayout private lateinit var appBarConfiguration: AppBarConfiguration override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) val binding =...

Quarkus: execute parallel unis In a quarkus / kotlin application, I want to start multiple database requests concurrently. I am new at quarkys and I am not sure if I am doing things right: val uni1 = Uni.createFrom().item(repo1).onItem().apply { it.request() } val uni2 = Uni.createFrom().item(repo2).onItem().apply { it.request() } return Uni.combine().all() .unis(uni1, uni2) .asTuple() .onItem() .apply { tuple -> Result(tuple.item1, tuple.item2) } .await()...

How to access each element of LiveData<List<MVoice>> with Kotlin? The Code A use for (aMovice in listVoiceBySort.value!!) to access each element of LiveData. But I don't think it's a good way because it use listVoiceBySort.value!!, it's ugly. Is there a good way to access each element of LiveData ? Code A val listVoiceBySort: LiveData =_listVoiceBySort fun selectAllIDs(){ for (aMovice in listVoiceBySort.value!!){ selectedIDs.add(aMovice.id) } }

Single selection recylcerview item kotlin When I click the Recycler View item, I want to change the background color of the clicked item to black and the text color to white. Also, when I click another item, the previously clicked item changes to the existing color, and I want to change the color of only the clicked item. Please see my code below and ask for help. ''' class OrderVintageAdapter(val context:Context, var dataList: ArrayList, var activity:Activity): RecyclerView.Adapter() { override fun onCreateViewHolder(parent:...

Android: How to update a field from a table in Room database I want to update a field from Table and my schema is like this: @PrimaryKey(autoGenerate = true) @ColumnInfo(name = "id") var _v: Long = 0, @ColumnInfo(name = "user") var user : User, @ColumnInfo(name = "_token") var _token : String? and user where I want to update a field(notificationEnabled) is like this: @PrimaryKey(autoGenerate = true) @ColumnInfo(name = "version") var __v: Int = 0, @ColumnInfo(name = "user_id") var _id: String, @ColumnInfo(name = "email") var email: String,...

Unable to add window using LiveData I am currently using LiveData and observers in my code, and as far as I know LiveData is lifecycle aware. I display an Alert inside of my observer as below private val orderDeliveryDateAlertObserver = EventObserver { // something UIAlertView.showAlertWithTitle(requireActivity(), getString(R.string.order_delivery_date), message, getString(R.string.cancel), null, getString(R.string.change_delivery_date) , { msg ->...

Same resolution in Android Studio and my Device but different looks I am currently programming an Android app and using Kotlin and Android 7, but when I run the app on my phone the picture is a bit different than when I design it in UI Designer. I have chosen the same resolution for both and I am stumped because I have had little contact with the frontend so far. Hopefully someone can help me, thanks already!

Is non-observable model object in the ViewModel against MVVM architecture in Android? I have a non-observable model class called Category in my fragment's ViewModel and my fragment(as View) is accessing it directly. This model is not supposed to be changed later and I declared it as a final property. Now my question is am I violating MVVM Architecture by declaring a non-observable model inside ViewModel? Thanks

Krangl: Count number of elements in column that are contained in another list I'm using Krangl library because I want to do simple exploratory data analysis. I want to count number of samples that are from some other array. I have following code val df: DataFrame = dataFrameOf( "structure", "biome", "layer18")( "mansion", "dark_forest", "ocean", "mansion", "dark_forest", "dark_forest", "mansion", "dark_forest_hills", "dark_forest", "mansion", "dark_forest", "ocean", "temple", "desert",...

Android Searchview UI takes default UI when focus happens in landscape for some devices only normally it looks like by the below image but when we tap on search view, the UI changed like below image

Create Dynamic layout in Kotlin I am working on a Android app in Kotlin which takes participants number as user input and then create different fields (basically asking for each participant name age gender etc) on next activity and then create a spreadsheet of the input data. I tried to do it by creating all the fields manually displaying them using if else statement and then assigning their values to separate variables and then put it in the spreadsheet . Is there any more efficient way to do it. Help is very appreciated.

how to implement sms verification design I would love to add this elegant verification code screen to my app but I'm completely lost in how to do it should I implement each box as a TextInputEditText ? how can I make the cursor move from one box to the next one while typing ? ps : I'm using kotlin

Is there a "direct assignment" for Kotlin's null aware operator "?:"? So, in Dart and also TypeScript/JS we have the equivalent null-aware operator ?? to Kotlin's ?:. With this in mind, if we find ourselves in this situation: a = a ?? b we can easily use this shorter syntax: a ??= b. This comes in handy when we are accessing a nested property. It's kind of ugly to do something like this: someObj.someProp!!.foo!!.bar = someObj.someProp!!.foo!!.bar ?: defaultBar when you could just do something like: someObj.someProp!!.foo!!.bar ?:= defaultBar It really...

android kotlin: storing retrieved data from url to room database method i made: private fun saveToRoom(albums: Array) { doAsync { /*val currentDBPath = getDatabasePath("albums_database").absolutePath println("DBPath is " + currentDBPath)*/ var items = ArrayList() for (album in albums) { val item = ProductList_Data() item.name = album.name item.price = album.price items.add(item) } db?.productListDao()?.insert(items) /*val musicAlbums =...

How to asign an textedit value to a float variable in Android Studio Kotlin very newbie in Android Studio Kotlin and am struggling to pass a value from an edittext object to a float variable, but it is proving to be a challenge. I was able to do it but only after making use of 2 additional variables; however I can't believe it can't be done directly. This is how I managed to do it: var temp: EditText = findViewById(R.id.txtPriceA) var temp2: String = temp.getText().toString() var priceA: Float = temp2.toFloat() The XML for the edittext is...

How to insert data to many to many table - room(Sql) android I created this table but i don't know how to add the data to the playListWithSongs table. @Entity data class( var songId : Long? = null, var name: String? = null, ) @Entity data class playlist( var playListId : Long? = null, var playlistName: String? = null ) @Entity data class playListWithSongs( var playlistId: Long, var songId: Long ) Here How to insert the ids to the playListWithSongs table?

Sample Togglz implemetation with spring boot kotlin Can anyone help me with sample example for spring-boot-kotlion with togglz feature.

Kotlin extension-method overriding I can write code like this: open class A{ open fun String.q(){ print("a") } open fun z(){ val s:String="" s.q() } } class B : A(){ override fun String.q() { print("b") } override fun z(){ val s:String="" s.q() } } fun main(args: Array) { val a : A = B() a.z() } And this normally works. Even more, if I remove "overriden" modifier from String.q() in B class, compiler says it's wrong. I've heard that I...

Cannot filter barcode scanner result with Filterable I am having problem to filter my barcode scanner result with my filter method. I need to have both manual search and barcode search on my EditText field search. Manual searrh works fine, bur when I scan barcode, the barcode number appears inside EditText field, but it doesnt activate search method. Filter code from MainActivity search!!.addTextChangedListener(object : TextWatcher { override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {}...