unresolved reference to java I need to do this: MainActivity::class.java for intents and using retrofit, but it marks "unresolved reference to java" and the ".java" part is highlighted in red.

PayPal android integration infinite loading on payment I am trying to implement paypal payment, using their documentation on sandbox accounts. So, my code looks like this: fun setupPayPal( payPalButton: PayPalButton, bottomSheetDialog: BottomSheetDialog, orderRequest: OrderRequest ) { val config = CheckoutConfig( application = fragmentActivity.application, clientId = Config.PAYPAL_CLIENT_ID, environment = Environment.SANDBOX, returnUrl =...

How to check usage of 'it' parameter in lambda with Detekt custom rule? I want to write a Detekt rule which disallows usage of implicit "it" variable in a multi-line lambda. I've written method override fun visitLambdaExpression(lambdaExpression: KtLambdaExpression) but I don't know how Check if the lambda contains 'it' variable. lambdaExpression.valueParameters contains nothing in that case. Check if 'it' is used in the lambda. And I've not found any documentation.

Testing Library with Selenium I'm a fan of the Testing Library so I've been searching on how to achieve the same mindset with Selenium (in Kotlin or Java). The idea is to avoid technical selectors (CSS, XPath, id., class, etc) and select as a user - mostly by what the user actually can see. That forces the implementation to be more accessible and the tests closer to reality and less coupled with tech details. The Testing Library mindset is: "The more...

android studio prevent past date in datepicker kotlin How can I disable only past date days from datepicker and not the future? I know it is somewhere around the startCalendar.set but I can't find the setMinValue. /* Calendar Start Date Button Click */ startdatepicker = findViewById(R.id.CalendarStartImage) startdateview = findViewById(R.id.StartDateTextView) val startCalendar = Calendar.getInstance() val startPicker = DatePickerDialog.OnDateSetListener{ view, year, month,dayOfMonth ->...

Why my app in kotlin crashes when calling a coroutine? I am trying to call a function in a Fragment that is in my ViewModel but it crashes everytime its called and I don´t know why. Here it´s the code: Call to a coroutine: binding.button.setOnClickListener { lifecycleScope.launch{ courseViewModel.repository.insertCourse(getData()) } Navigation.findNavController(it).popBackStack() } The code of the function: suspend fun insertCourse(course: Course) = courseDAO.insertCourse(course) If I...

Kotlin - Invalid document reference. Document references must have an even number of segments, but seller has 1 I have a collection named Seller in my Firestore database, I've already done adding documents inside it. But my problem now is I want to add a Document with a SubCollection inside Seller named Category and Product, any Idea? here is my Add Product Activity code class AddProductActivity : BaseActivity(), View.OnClickListener { private lateinit var binding: ActivityAddProductBinding private lateinit var mProductDetails: Product private lateinit var mSellerDetails: Seller override fun...

Is return inside function definition is also a expression in kotlin fun trueOrFalse(exp: Boolean): String { if (exp) return "It's true!" return "It's false" } I was reading atmoic kotlin book where it says this function contains 2 expression so I just wanted to is function return also expression in kotlin ?

Android Kotlin: Hilt how to get object of Application class? Here i created application class dependency. now i want to access @Module @InstallIn(SingletonComponent::class) class MyApplicationModule { @Provides fun providesMainApplicationInstance(application: MainApplication): MainApplication = application } My application class is: @HiltAndroidApp class MainApplication : Application() { override fun onCreate() { super.onCreate() } fun printData(){ Log.d("Test","Awesome print data") } } i want to...

Gradele can not find firebase auth ktx library in android As you can see below, I have encounter this error when I try to download missing files inside firebase auth.ktx library otherwise I can not reach any document written about classes, methods or properties. this is my Project built file and that one is Model built file <a href="" rel="nofollow...

Grid with larger first item in Jetpack compose I'm trying to achieve this view with jetpack compose: I create a row consisting of an image with a weight 0.7 and a column that contains those smaller images with a weight 0.3. But there is always padding at bottom of the column and they won't align perfectly. My code: @Composable fun TrendingSection() { Row(horizontalArrangement = Arrangement.SpaceBetween) { Image( painter =...

Cannot send in Coroutines Channel I am practicing Coroutines Channel and I'm wondering why does the repository.getAllRates() did not trigger even my code reached the sellCurrencyChannel.send(CurrencyRate(“”, 0.0))? I'm also suspecting that the sellCurrencyChannel.send() was unsuccessful. private val sellCurrencyChannel = Channel() val sellCurrency = sellCurrencyChannel.receiveAsFlow() val sellAmount: LiveData? = null val allUserBalance = repository.getAllUserBalance() .flatMapLatest { if...

Naming Conventions? I am following this official code style guide for Kotlin (link goes to the section in particular): https://kotlinlang.org/docs/coding-conventions.html#property-names This is my first time following a Code Style guide, so I want to verify, are they saying that all variable names that aren't immutable should be in UpperCamelCase? The second example shows a mutable list, so I assumed that...

Implementing button on-click timer in kotlin with firebase? Is there a way to implement firebase with kotlin for an on-click timer? I want to create a button in kotlin in which when we will click on this button after 15 min only we can again click on these buttons and In the same button, they cannot be able to click more than 10 times in a day. It should be managed by firebase. I tried to implement it implement for problem no. 1 but not for problem no 2. so I want to know how I can implement it with firebase. And If Firebase can't provide that...

Turn off dark mode on device programatically. (or other solution) Android studio Kotlin So I need a little help here. My problem is, that when I have a function in my app for changing to dark mode, then when I change it when the device is in light mode, it changes just fine, but when I change it when the device is in dark mode, it does not change some things (background and text). I have found a solution, that when I disable dark mode in device options, it works just fine. I just want to change the app theme when you change it in the app, not when the device theme is changed,...

Why my code is not working in this part in MainActivity? the "makeCurrent is not working is getting an error" please someone can help me? the code: val favoritesFragment = FavoritesFragment() val quotesFragment = QuotesFragment() // this makeCurrentFragment is getting errors // makeCurrentFragment(favoritesFragment) } private fun makeCurrentFragment(fragment: Fragment) = supportFragmentManager.beginTransaction().apply { replace(R.id.fl_wrapper, fragment) commit() }

Calling getStringExtra("key") on my Intent gives me null This is so simple but still doesn't work. I simply want to pass a string to the ACTION_PICK Intent to retrieve it in registerForActivityResult. Here is my code: class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val gallery = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI) gallery.putExtra("filename", "test")...

flutter receive intent with singletask lauchmode I am very new to android development and trying to send whatsapp export chat from wp to my app. I followed the receive incoming intent example and some other answers and came up with this. // mainActivity.kt //...

How to answer my own stackOverflow question? [migrated] I have a 7 month old question in StackOverflow that get no answer, now I want to answer the question myself but I am not getting any option to answer it. Can anyone tell me how to answer my own old question. Below is the question's link:- How to add Two Modal Drawer in same screen?

How can I create a data visualization line graph with the feature of marking the graph? see image of UI attached: I need to present the data in android in the form of a Line graph and give the users a feature to be able to mark certain portions of the graph (starting and ending marker). I know I can easily implement the graph using some famous libraries like MPChart and AnyChart but the thing is very straight about the feature...

Kotlin: CountDownTimer stops running in service when screen is off I have a service running even when screen is off. That works well when listening to a ble-device or a firebase database. But i have a problem with a simple CountdownTimer. The CountdownTimer obviously pauses when the screen is off while all the other listeners to firebase and the ble-device are still listening. The timer continues running as soon as screen is on again, but then the timing is obviosuly delayed for the time the screen was off. What could be the problem here? Is the timer...

Displaying an image from internal storage from android phone with Kotlin I have made a very simple app to take a picture using camera x, with a viewfinder and it displays the image taken in the same activity I am trying to get all the images taken from the internal storage and display them in another activity in the app with a recycler view Im fine with recycler views, and I can use one with external Api's to display images and data but I just cannot figure out how to get the images from the internal storage, and add them to a list to display in the recycler view,...

HorizontalCalendarView available date Color change In my project I'm using this library to view my calendar. In this horizontal calendar library provide to change the text color(DefaultColor and SelectedDateColor). In my case I have to show the default, selected and available date text color. Like this. this is my code horizontalCalendar = new HorizontalCalendar.Builder(view,...

How to support emoji in Android using Jetpack Compose Just like the title, I found that emojis don't show up correctly in Jetpack Compose. I'm going to make an offline app, so I'll use the emoji2-bundle or use the NotoColorEmoji font. How to use the emoji2's component in Jetpack Compose (I tried using AndroidView(), but I don't know what arguments to pass in. Especially, the type of font's size in Androidview() is Float and not TextUnit(like .sp), I don't know how to convert it), or get emojis in a String and use the NotoColorEmoji font in...

I get an error for this Intent , I dont know why I have created a 50 second timer. I want it to call another screen using an Intent after the timer ends. But I get an error saying None of the following functions can be called with the arguments supplied. (Context!, Class!) defined in android.content.Intent (String!, Uri!) defined in android.content.Intent class NewGame : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_new_game) val...

Spring List all files in static directory I use Spring with embeded Tomcat and a War file in prodution. I need to list all files in the "static" directory. It's like 4 days I m on it This kind of code not working : Stream.of(new File(dir).listFiles() It lists the files where the war is located but the static directory is inside the war With this code I arrive to read a file inside the war : Thread.currentThread().contextClassLoader?.getResourceAsStream(path)?.bufferedReader()?.use(BufferedReader::readText) But it's not working with...

why I am not able to code and edit code in android studio in activity_main xml file? In Android Studio When I try to edit or add code in activity_main.xml, It won't change additionally it gets highlighted. Would someone tell me how can I make it right?

Kotlin: Camera takes photos only on emulator (Android 8) and incorrectly displays links to photos in Realtime Database from Storage I'm writing an application in the form of instagram (I study lessons from YouTube, they create it on Android 8, I'm trying to do the same on Android 10), I've only known Kotlin for a couple of weeks. Already implemented a lot. But it is with firebase that problems arise. Two questions: Register a user in the application and save his text data in firebase - I can do it from any device. Through the emulator on Android 8 - I can take a picture and everything works as it should, even the link to...

How can I refactor a module in Android Studio to a subdirectory? From the screenshot below, how can I refactor the highlighted directories and files into MoveToThisDirectory? Simply refactoring will cause issues such as Error: AndroidManifest.xml doesn't exist or has incorrect root tag. Which I have not figured how to resolve.

Jetpack compose navigation with viewModel I'm trying to use jetapack compose navigation inside viewModel. when navigation gets triggered nothing happens. here's my approach: I define NavigationDestination. In my case, I have four screen: welcome, sign in, sign up, and survey interface NavigationDestination { val route: String } sealed class Screen(override val route: String) : NavigationDestination { object WelcomeScreen : Screen("welcome") object SignInScreen : Screen("signIn") object SignUpScreen :...