How do I get my logarithm and ln in Kotlin? I built a calculator with Kotlin, but I have a problem when I want to logarithm and get ln I get the following error when I run my program and want to get my logarithm invalid Double : This is my code class MainActivity : AppCompatActivity() { @SuppressLint("SetTextI18n") override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) tvLog.setOnClickListener { tvExpress.text = tvExpress.text.toString()+"log"...

Android Studio/KOTLIN setOnClickListener Error i am taking this error(Screenshoot). Please explain me how can i fix this. setonclicker is not coming. val customerButton = findViewById(R.id.customerButton) customButton.setOnClickListener { val Intent = Intent(this,MainActivity2::class.java) startActivity(Intent) }

Glide 4, Firebase Storage and timeout I'ld like to upload images from Firebase Storage and cache them using storagereference. This is my AppGlideModule : @GlideModule class MyGlideModule : AppGlideModule() { override fun registerComponents(context: Context, glide: Glide, registry: Registry) { super.registerComponents(context, glide, registry) registry.append( StorageReference::class.java, InputStream::class.java, FirebaseImageLoader.Factory() ) } } All works fine when...

possibly reverse runpointer in higher order function - Kotlin write a method "lastWhere" that accepts a function called "where" of type (T) -> Boolean. The method returns the last element of type T to which the "where" function applies. If no matching element is found, null is returned. call the method "lastwhere" on the linked list below. Find the last game that is more than 10 euros. So far I've got this Code going for me. I assume the only important piece of Code I need to edit is the "fun lastWhere" for task number 1) the second task wants me to...

init block with 2 new functions in a linked list in kotlin I've come so far and wrote all I could solve in my home assignment. However, I simply can't solve the next 3 tasks I got. Any Suggestions are appreciated! 1) write an "init" block in which you initialize the linked list with the transferred video games. This "init" block enables you to build a linked list from a "normal" list 2) write a method called "appendAll" that takes an object of the LinkedVideoGames type and appends this list to the current list. 3) Implement a method called...

How to count the number of string characters in kotlin? @SuppressLint("SetTextI18n") private fun countName(x: String) { val textView: TextView = findViewById(R.id.result) for (i in 0 until x.length) { textView.text = i.toString() } } } This is what i have so far it works somewhat but for some reason it is lagging behind 1 number for example if i type James the number it will output would be 4

Navigation Offline add Region API Request get 502 error (bad gateway) I'm trying to deal with Navigation Offline add Region API in Navigation SDK in mapbox, in process of request an API, I get 502 error (bad gateway), I apply what the Doc's say's , not fixed, However This is the Doc URL : https://docs.mapbox.com/api/private-beta/offline-data/ Kindly, any one experience this before ?<a href="https://i.stack.imgur.com/rwMHe.jpg" rel="nofollow noreferrer">enter image...

Zresetuj aplikację podczas próby obracania I have a problem. When I rotate the screen, my application resets. I don't know what could be the reason. Will you help me?

Restore purchase(subscriptions) button for android java I am using the source code found below. I want to add a restore purchase, restore subscription button to it. I couldn't find an article on how to do this. Regards. https://github.com/android/play-billing-samples/tree/main/TrivialDriveJava

This if statement that make this "state= true" and make app error out Kotlin I am using the Kotlin in this timer app trying to pause the timer I get this error. It's not running the first if statement that is true. E/AndroidRuntime: FATAL EXCEPTION: main Process: com.proITAssets.myapplication, PID: 12792 java.lang.IllegalStateException at android.media.MediaRecorder.pause(Native Method) at com.proITAssets.myapplication.MainActivity.pauseRecording(MainActivity.kt:143) at...

Why isn't my explicit BroadcastReceiver starting on the Android Emulator? I want to start an explicit BroadcastReceiver when the app start so I have the declaration of my receiver in AndroidManifest.xml like this:

The receiver just show a Toast wiht Start receiver message package com.modev.appy import android.content.BroadcastReceiver import android.content.Context import android.content.Intent...

How do I keep an image saved on an application even after the app closes? I'm making a card holder app, the user is supposed to take a picture of his id, contacts, notes etc. so he can later use them digitally. Problem is how do I take a camera input and save it as an image inside the application so it stays there?

How to declare that null is a valid value for a kotlin type using avro In summary, I'm creating a project that converts a json to an avro file. Some fields of this json can be null. In Java the solution is add the annotation @Nullable (org.apache.avro.reflect.Nullable) and that works perfectly. However during the conversion to Kotlin this annotation does not work. I could easily create the schema manually and allow a null type... but I was thinking something cleaner.

How to read the lambda syntax in Koin factory DSL? I recently started looking in to the Koin di library and I am very confused about this code snippet: factory { (view: FeatureContract.View) -> FeaturePresenter(view) } Specifically this part: (view: FeatureContract.View) -> FeaturePresenter(view) // Why not the following? { view -> FeaturePresenter(view) } I am very confused about the Koin DSL syntax here. As you can see this is a lambda like structure with lambda arguments in parentheses (How?). Which I had a very...

how can ı add youtube player video view to a layout? ı want to add youtube player video view to a layout. and then ı want to add this layout to my context. however ı got an error. this is my layout's XML part and also this is my activity part var v : View = LayoutInflater.from(applicationContext).inflate(R.layout.yview, null) var y : YouTubePlayerView = v.findViewById(R.id.yView) edit: this is the error "Error inflating class com.google.android.youtube.player.YouTubePlayerView"

How can I turn on/off the parameter hint function for Kotlin using Android Studio? For example when I try to use the function "description" declared as below: public fun description(account : String, balance: Double) Instead of showing like this: account1.description("Joe", 1000.00) Android Studio with smart parameter feature will show like this: account1.description(account: "Joe", balance: 1000.00) It may be helpful for somebody, but I find it annoying. Thanks!

How can i add empty constructor to RecyclerView Adapter android kotlin I need to add empty constructor to my Adapter, but i have already primary constructor. My code: class RvStatesAdapter(private var stateList: List): RecyclerView.Adapter() { inner class MyViewHolder(val binding: RvStateListBinding): RecyclerView.ViewHolder(binding.root) override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder { return MyViewHolder(RvStateListBinding.inflate(LayoutInflater.from(parent.context), parent, false)) } override fun...

Mockk has issue to create liveData as return value When I wanna create something like this: every { myUseCase.run(any()) } returns liveData { expectedValue } I got this error: tried to access class androidx.lifecycle.LiveData$ObserverWrapper from class androidx.lifecycle.LiveData$Subclass0 I tried lots of combination of my dependencies. But nothing worked. first thought may because of Robolectrics but seems its Mockk issue. I updated all dependencies to last version but issue still there.

Ive a function in Kotlin and trying to use it Android Studio, but it doesnt work If I click the button1 the function has to change the text. The text is here: And I want to change the Text "Hello World" to a text from my function : fun aufruf() { val items = mutableListOf() items.add(BisHunterMarksman("Head", "Rattling Deadeye Hood\t", "\tThe Necrotic Wake")) items.add(BisHunterMarksman("Necklace", "Trailspinner Pendant\t", "\tMists of Tirna Scithe")) for (element in items) { println("${element.itemSlot}\t" + element.name +...

Kotlin Mockito NullPointerException There are classes: @Singleton class Exchange( @Client("\${exchange.rest.url}") @Inject val httpClient: RxHttpClient ) : Exchange { override suspend fun getSymbols(): List { val response = httpClient.retrieve(GET("/someurl/symbols"), ExchangeInfo::class.java).awaitFirst() return response.data .map { it.symbol }.toList() } } @Introspected @JsonIgnoreProperties(ignoreUnknown = true) class ExchangeInfo( val data: List ) @Introspected...

How to focus a invisible item in lazyColumn on jetpackCompose I want to scroll the lazyColumn when its child get focused. I use rememberLazyListState's scrollToItem method to scroll the lazyColumn. but when a item at top been scrolled out, it can't be focused again. My sample code: @Composable fun LazyColumnFocusDemo() {...

How to open the camera in videoView in kotlin OR How to to resize the camera length and width Here is the sample of code i want to show camera which looks like videocalling small camera the camera size will be small such as in video calling app small camera val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE) when { Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1 && Build.VERSION.SDK_INT < Build.VERSION_CODES.O -> { cameraIntent.putExtra( "android.intent.extras.CAMERA_FACING",...

Glide,coil not loading images in emulator in my application when i use real device every thing working as expected and the images is loaded successfully using glide but in emulator all the images fail to load. here is what i tried: check internet connection try emulator with sdk 28 and 30 Screen shots:

InjectMocks doesn't work with Kotlin constructor arguments with default values I have a class defined like so: class MyClass(private val myDependency: DependencyType = DependencyType()) { ... } Looks like a test defined like so does not work because the mocks are not injected: @ExtendWith(MockitoExtension::class) class MyClassTest { @Mock private lateinit var dependency: MyDependency @InjectMocks private lateinit var underTest: MyClass } Any thoughts as to why?

Modifier doesn't work when used with .apply Why is it that border modifier is not applied when used with .apply { }? val selected = remember { mutableStateOf(true) } val selectableModifier = Modifier .padding(horizontal = 5.dp, vertical = 8.dp) .apply { // this changes, but border is not applied println("$selected changed") if (selected) { border( BorderStroke(1.dp, MaterialTheme.colors.primaryVariant), RoundedCornerShape(13.dp) ) } }

Serenity BDD project pattern I just started in a new company which have already created serenity bdd framework with Kotlin. I used to work with Cucumber BDD framework with POM and Java. Now I in my current framework they used Junit and Cucumber and it's hard for me to understand the project structure(where do we put the WebElements,StepDefinition files, etc.) Can anyone draw me a basic project structure(patter with the packages etc.) Thanks in advance

Simple Date time gives the wrong format of date class TimeStampFormat { private val recordDtmFormat = SimpleDateFormat("yyyy-MM-dd HHmmss",Locale.ENGLISH) // private val recordDtmFormat = SimpleDateFormat("yyyy-MM-dd'T'HHmmss.SSS'Z'", Locale("en","IN")) fun getTimeStamp(): Date{ return recordDtmFormat.parse(Calendar.getInstance().time.toString())!! } fun parseDate(date:Date):Date { return recordDtmFormat.parse(recordDtmFormat.format(date))!!.also { Log.i("mpurusharth","last $it")...

RecyclerView Change ImageView in a certain position I am building a memory game with RecyclerView grid layout. When user clicks 2 time and didn't find the matched pictures, I want to change image view resource only in the clicked positions. I built the logic sucessfully, but I don't know how to change imageview's resource in only certain positions.

how to open camera in videoview I want developed a basic Android application which simply displays the phone's camera view in a VideoView element.but when i open application it's directly open the camera.i want to open the camera in videoview val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE) when { Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1 && Build.VERSION.SDK_INT < Build.VERSION_CODES.O -> { cameraIntent.putExtra( "android.intent.extras.CAMERA_FACING",...

Android library how to separate same library different version How can i separate same library different version Iproov depends on socket.io version(1.0.1) i don't want upgrade socket.io 1.0.1 to 2.0.1