Get and Set in Kotlin I'm a beginner with Kotlin and in this example given to me, i need to get the area of a rectangle with the user entering the length and width. Along with this, the user will enter a new area and I need to solve for its length and width. I need to use getters and setter with this and it is quite confusing. Here is the code I have done for this: import kotlin.math.sqrt class Rectangle(val length: Double, val width: Double){ var area: Double //this is the part I'm most confused on get() =...

Does Android In-App Subscription purchaseTime inside PurchaseData class Update With Each Monthly Renewal? Hii i m using this https://github.com/anjlab/android-inapp-billing-v3 library. i have implemented subscriptions using this but i m not sure when the subscription renew after first month does the purchaseTime inside PurchaseData is updated in subsequent months afterwards or purchaseTime contains the first time i have purchased subscription ? plz help. thanks in advance. i have viewed similar questions...

How can I reduce recomposition in Android Studio? The are two members both current and max in data class MyData in Code A, current is updated frequently and max is updated occasionally. So I hope the UI component Text(text = "Max ${myData.max}") is only updated when it need. How can I do? Maybe Code B can't reduce recomposition, right? Code A @Composable fun Greeting(handleMeter: HandleMeter) { var myData = handleMeter.myData Column( modifier = Modifier.fillMaxSize(), ) { Text(text = "Current...

OnActivityResult always returns RESULT CANCELED (Code: 0) on Android 11 Sadly, Android 11 storage restrictions are too hard and confusing. I'm trying to pick a document using the below code fun onFile(activity: AppCompatActivity?, fragmentContext: Fragment?, isMultiple: Boolean?, pFileMimeTypes: Array?): Intent { val intent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply { action = Intent.ACTION_OPEN_DOCUMENT addCategory(Intent.CATEGORY_OPENABLE) putExtra(Intent.EXTRA_ALLOW_MULTIPLE, isMultiple ?:...

How to extract frames from a video using opencv or any appropriate library in android studio I am working on a machine learning project. I want to extract frames of a video and then I want to apply the TensorFlow model on each frame and after that, I want to convert that processed frames again to video. Kindly help me to find the solution.

How to parse generic key with kotlin serialization from JSON I am struggling with come up with idea how to properly parse JSON like this: { "generic_key": { "version":1, "ttl":42 } } where expected kotlin class should look like this: @Serializable data class Config(val version: Int, val ttl: Long) { @Transient var key: String? = null //

Bezier curve for bottom navigation view android Following this solution but unable to create shape like above image

How do I make a generic function with generic function as parameter in Kotlin? I have about 20 files that look like the Red and Blue section from the picture above, now I want to add private val requestDataSource: RequestDataSource parameter (Green line 15) and call requestDataSource.post() (Green line 20) to all of them. I've attempted to create a generic function with a custom parameter P, custom return type RET and a function parameter so I can use it as I do in the sendEz function but it's...

Controlling remote applications like sound cloud from third party application I am developing an application that has a control panel like Iphone. Everythhing is done except i can not handle the media buttons from my service. I want to list all music players that use media browse service. when use select any music player from the list. my app should access all meta data of the music player and can be able to connect to its media session to controll its playback from background witout launching it.

Check if cached url and current url are the same or different I have a webview that is loading data and caching it , in the code below this cached data is being loaded if it is found However I want the webview to reload from the network if it finds a change in the url rather than just loading the recent cached item Is there a way for me to compare the current url with the cached one , or someway to have the webview load the cache if the same or the new one when different wvStructue.settings.javaScriptEnabled=true...

Android Recyclerview with editable elements not updating correctly with new element So, I have a Recyclerview, where every element contains an Icon, a textview and a textedit. The adapter looks like this: class ZutatenSmallListAdaptermitEingabe internal constructor( context: Context, parent: NewRezeptActivity ) : RecyclerView.Adapter() { private val inflater: LayoutInflater = LayoutInflater.from(context) private var zutaten = emptyList() private var mengenedits = emptyList()...

GraphQL netflix-dgs codegen generateJava imports java.util unnecessarily I added the following type and enum to my schema.graphql enum Currency { USD EUR GBP AUD CAD ILS HKD SEK NZD SGD CHF ZAR BRL CNY INR MYR MXN PKR PHP TWD THB TRY AED } type Money { amount: Int! currency: Currency! } and then ran generateJava. And the result is the following package com.fiverr.apps.financial_analytics_kimera.generated.graphql.types import...

Null pointer exception while testing fragment using robolectric i am a newbie to android app testing. i am trying to test login fragment using robolectric where i type in email and password and click on a button. here is the test code-> @RunWith(RobolectricTestRunner::class) class LoginSuccessTest { private lateinit var navigation: AppNavigation @Before fun setupTestEnvironment() { navigation = mock(AppNavigation::class.java) } @Test fun loginSuccess() { //line where there is an error val activity: MainActivity...

Move from one fragment to another with ImageView I want to move from one fragment to another fragment on a click of an Imageview. Can anyone explain to me step by step? I need the code in Kotlin.

OnClickListener on button inside a RecyclerView /ViewHolder I'm trying to delete items from a list, which is shown as a RecyclerView. Furthermore I would like to choose a item and open an new activity. (Data stored as Shared Preferences) How do I get the itemname? MainActivity Class - GroupActivity class GroupActivity : AppCompatActivity() { private lateinit var viewModel: GroupViewModel private lateinit var...

Not able to display subtitles in vimeo videos in exoplayer2 after updating library from 2.10 to 2.16 exoplayer2 is implemented in anroid app I am working on, to display vimeo video and I am also getting subtitles link from vimeo. It was working well in 2.10 version code but after updating to 2.16 most of the methods are deprecated now subtitles stopped showing, no matter if I use MediaItem or MediaSource. Following is the code I have tried. In 2.10 code was as below val videoSource: MediaSource = ProgressiveMediaSource.Factory(dataSourceFactory)...

How to bundle an executable jar file to be run as a cli command on macOS with jpackage (or similar tools)? I have written a command line tool using picocli and Kotlin. Then I compiled it to an executable uber jar and it actually works as a standalone application by running java -jar MyJarFile.jar [cli options and parameters] But how do I bundle it so that I can distribute it on Mac, so that I can run it as mycommand [cli options and parameters] I know I can use jpackage, I used it and generated a .pkg file that installed the app on my Mac in the /Applications folder. I guess there is a file that...

Change type of raw folder I made a raw folder with a value type . Like this : Now I can't delete raw folder or change its type . help please .

Scroll problem with Textbox and RecyclerView - Android - Kotlin I am having a Linearlayout which is having a Textview and the Recyclerview. The problem is that when RecyclerView's data is increased then when we scroll, the Textview above the recyclerview keeps it position i.e. not scrolled and only RecyclerView's contents are scrolled. I want whole screen to be scroll instead of only RecyclerView scrolling. Thanks

How to get uri for a pdf file stored in documents folder on android device I am trying to get the uri for the pdf document stored in documents folder on actual android device. Actual doc path on device is /storage/emulated/0/Documents/testme.pdf to get the uri for this file this is the code I have tried override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if (resultCode == Activity.RESULT_OK...

is there any alternate for arraylist.remove(element) function? my recycler view reloads with spinner value, selected data is stored in a global arraylist, and here is my recycler view code to do the selection and deselection. Selection and deselection works just fine, but when i select and change spinner value, and then come to back original spinner value, where items are already selected, deselction happens, but item is not removed from the global arraylist. While debugging i found that cursor reaches there, but i dont know why .remove() isnt working....

How to create diagram from a composable function in jetpack compose? I am working on Frontends using Kotlin and Jetpack compose in Android Studio. I have a file that contains a composable function and no attributes. I was thinking of a class diagram, but the file has no attributes, only a function. How can I draw a diagram that represents this file and its composable function? Which diagram should I choose? For any help I am grateful thanks in advance

How can I place a button under the composable screen correctly? How can I place a button under the AnimatedScreen? At the moment, the button is hidden and it is not visible. Shouldn't the elements in column be arranged sequentially, or is it a matter of the parameter fillMaxSize in AnimatedScreen? Surface { Column( modifier = Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(10.dp), horizontalAlignment = Alignment.CenterHorizontally ) { AnimatedScreen(Modifier, rawId = R.raw.onboarding)...

Where to execute some initialization native code in flutter? Where do I need to execute some initialization native code in flutter? In the MainActivity class: public class MainActivity extends FlutterActivity { protected void onCreate(Bundle saveInstanceState) { @Override super.onCreate(saveInstanceState); // some initialization code } } or in the MainApplication class: public class MainApplication extends FlutterApplication { protected void onCreate() { @Override super.onCreate(); // some initialization code } } Is...

How do I set a different kotlin version for flutter app? (I guess) I'm using a flutter package "flutter_ironsource_x" to get ironsource ads showing in my app. When attempting to build, I get an error as this: Running Gradle task 'assembleDebug'... e: C:/Users/myname/.gradle/caches/transforms-2/files-2.1/683fded33b117c0eb9bb9deabca1a71e/work-runtime-2.7.0-api.jar!/META-INF/work-runtime_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15. FAILURE: Build...

Why can I cancel a Flow without either invoking yield or determining isActive() identification in Kotlin? I have read the article. There are two approaches to making computation code cancellable. The first one is to periodically invoke a suspending function that checks for cancellation. There is a yield function that is a good choice for that purpose. The other one is to explicitly check the cancellation status. I know Flow is suspending functions. I run Code B ,...

How to collect items from a Flow until a particular condition is met? I have a Flow and I want to collect this flow but only until I get a null Int. Then the flow should get cancelled. For example, val flow = flowOf( listOf(1, 2), listOf(3, null), listOf(4) ) flow.collectUntilNull { println(it) } The output that I want is: [1, 2] [3, null] I know there is a function Flow.takeWhile but it doesn't emit the value where predicate returns false. In my case I want that one also. public fun Flow.takeWhile(predicate: suspend (T) -> Boolean): Flow =...

How can I set current date (Today's date) same as selected date in Material Date Picker Android How can I set current date (Today's date) to my local date. My timezone is GMT+07:00. I can just set only setSelection() date but can't set current date. (Sorry for my any grammatical mistake and thank you in advance) val c = Calendar.getInstance(TimeZone.getTimeZone("GMT+07:00")) val gmtTime: Long = c.getTime().getTime() c.setTimeZone(TimeZone.getTimeZone("Asia/Bangkok")); val...

What can I do if Dagger's annotation doesn't work Unfortunately, even though, that I added dependencies of Dagger. Dagger's annotation is not visible. I've tried invalidate caches and restart. Also, I've tried rebuilding of the project if I'm not mistaken. What can I do? Thank you guys in advance.

Android :: Pick a file with specific extension I need to pick a file with specific extension (.jpg, .jpeg, .png and .cv). I'm trying to make it using standard chooser intent private fun showFileChooser() { val intent = Intent(Intent.ACTION_GET_CONTENT) intent.setType("*/*") intent.addCategory(Intent.CATEGORY_OPENABLE); val chooseFile = Intent.createChooser(intent, resources.getString(R.string.work_experience_select_file)) getResult.launch(intent) } To retrieve result I'm using this stuff ::...