Java: object construction/initialization can be deferred? I'm working on some android project where I'm mixing Java and Kotlin. I have a piece of Kotlin code that I decompiled in Java to see how it is actually converted. Kotlin code fun postSettingToServer() { val request = CoockieJsonRequest(Request.Method.POST, URLBuilder.GetPushSettings(this), pushModel!!.toJSON(), null, null) VolleySingleton.getInstance(applicationContext).addToRequestQueue(request) } Android studio created Java equivalent public final void...

How to get user details by id in Kotlin and sqlite? I have followed the tutorial of creating Login and Registration app, where after login you can see all registered accounts, but i want to show only logged in account with user details. I'm using recycleview for displaying all accounts. Here is some code of databasehelper, login activity, and userList activity. DatabaseHelper class DatabaseHelper(context: Context) : SQLiteOpenHelper(context, DATABASE_NAME, null, DATABASE_VERSION) { // create table sql query private val...

What exactly is a data frame from programming point of view? What exactly is a data frame from programming point of view? In a language like Kotlin how could one approach its implementation?

Android e-mail intent with html formatted I want to send email with html formatted string like I am Bold I have tried so many examples like. Try 1 : val text = if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) { Html.fromHtml(StringBuilder().append("I am Bold").toString(), Html.FROM_HTML_MODE_COMPACT) } else { Html.fromHtml(StringBuilder().append("I am Bold").toString()) } val intent = Intent(Intent.ACTION_SEND) intent.type = "text/html" intent.data =...

Is there a way of checking an android device's cloud backup settings programatically? In Android studio I want to display a message in my app if backing up to google cloud is not active in the device settings. Is this possible? What would be the best way of going about this? (preferably in Kotlin) Thank you

How to set height of element to match height of another element? in android I Want Changing element Size With Visible And Gone Other Element ? For Example I Want changing this Parameters Blockquote set weight number2 Equal with height number1 For Ever Why For Ever ? **Because by changing the number1 height, the number two changes automatically ** How Can I Do It ?

Is it possible to overlay an icon on a picture I'm creating an application where the user is allowed to upload pictures. When the picture has been uploaded successfully I would like to add a green check at the upper right corner (drawable). The same when failed but with a cross. Atm I'm using Glide to show URI's on the screen. How could I achieve this?

Get started with Android NFC Im new to the NFC plattform on Android and i would like to get started with an simple NFC app, That read tags and write tags. Is there any like good guide or libary on this subject?. I have read the android documentation which is a good start but i dont know to proceed from there. Any kind soul that can point me in the right direction? Have a nice day!

How to upload videos on Youtube to a particular youtube account on Android programatically Here is my use case: I want users to be able to upload video content from their devices directly to my youtube or a dedicated youtube account without leaving my app. First of all, is this possible? Please I will appreciate code samples. Thanks

How can I build a dynamic Grid Layout used in an app to display multiple views? I want to create an app like Zoom or Skype and I need to show on a single screen from 1 to 6 screens (one for each participant) and I found Grid Layout. Would be a good idea to use Grid Layout in this situation? For the moment, I want to add and remove only images so I can easily test if it works fine.

No static method intArrayOf how to solve the problem? The application crashes when I use the intArrayOf method. How do I fix the code in this section? ↓ companion object { private val STATE_ERROR = intArrayOf(R.attr.state_error) const val ACTION_NONE = 0 const val ACTION_CANCEL = 1 const val ACTION_HINT = 2 } This is how I solved the error in another document below. But how do I fix this error? private fun initChart() { val numbers = IntArray(5) { 10 * (it + 1) } chartUpload.init(numbers) val download = IntArray(5)...

Getting application context for getInstance function of database class (android kotlin) I am writing an android application following the Android Architectural Components design. This is the database class: @Database(entities = [Authentication::class],version = 1, exportSchema = false) abstract class AuthDB: RoomDatabase(){ abstract val authenticationDao :AuthenticationAccessObject companion object{ @Volatile private var INSTANCE: AuthDB? = null fun getInstance(context: Context): AuthDB { synchronized(this){ var...

Kotlin 1.4.20 - slower build We see huge build performance hit just because of updating from 1.4.10 to 1.4.20 in execution phase of the build. The number of times retrieved cache etc. seems the same. Almost each module just takes sometimes 10 times more time to compile. Any hint where to look? Thanks Basic info: Gradle 6.7.1 Kotlin 1.4.20 or newer 1.4.21 Android Gradle Plugin 4.1.1 Gradle Daemon VM heap size is ok Windows and Linux tested - same result Screenshots - same build, same machine - just changed Kotlin version...

Unable to inject viewModel I am trying to inject the below ViewModel using Koin. package com.example.koinapplication.ui.main import android.util.Log import androidx.lifecycle.MutableLiveData import androidx.lifecycle.ViewModel import com.example.koinapplication.models.Dog import com.example.koinapplication.repo.DataRepo import com.example.koinapplication.repo.DataSource import org.koin.core.component.KoinComponent import org.koin.core.component.inject import org.koin.java.KoinJavaComponent.inject class MainViewModel...

Retrofit doesn't work and has problem with OpenSSLSocketImpl I was trying to get data with Retrofit but I had this problem. compileSdkVersion 30 buildToolsVersion "30.0.2"

Your reply url contains prohibited words or prohibited domains: at the time configuration of android platform in Azure Microsoft platform I am implementing login with Microsoft account in android application. I have created Azure account and Set up a tenant in that I register one application with Accounts in any organizational directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox) Account type Now in this I am trying to configuring android application using Package name and SHA key at that time I am getting Your reply url contains prohibited words or prohibited domains please help...

Android Studio: id of plain text does not work I have a problem. I am working on an inventory app and i put in a plain text with the id: editTextItemName But when i use it in my code: class AddItemActivity: AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.add_item) val database = getSharedPreferences("database", Context.MODE_PRIVATE) database.edit().apply { putString("savedItemName",...

Kotlin How to map a Class Type to field Type inside model class using Kotlin Generics? Good day Kotlin Developers! I'm building an android app written in Kotlin which calls soap web services api using Retrofit & OkHttp. I'm using this library TikXml for parsing kotlin model classes to Xml & vice-versa. You can take a look at the docs if you want, it might help in understanding my problem. Here are two...

MockK, Kotlin: How to mock a class with undesired (unmockable) logic in its init-block? In my project in Kotlin I have a class which looks quite simple, similar to this: class Props { init { val reader = InputStreamReader(this.javaClass.classLoader.getResourceAsStream("env.properties")!!, "UTF-8") // use the reader ... } fun getPropValue() : String { // ... implementation } // some more logic } And another class, which I want to test in a unit test with MockK: class TestedClass { private val propValue = Props().getPropValue() // some methods...

'Inappropriate blocking method call' - How to handle this warning on Android Studio I have written this code snippet to download image files from firebase storage to local storage. contentResolver.openOutputStream(uri)?.use { ops -> // * val ips = Firebase.storage.getReferenceFromUrl(model.mediaUrl).stream.await().stream val buffer = ByteArray(1024) var len: Int while (ips.read(buffer).also { len = it } != -1) { // * ops.write(buffer, 0, len) // * } ips.close() // * ops.close() // * } In the marked lines, android studio is...

Please help convert this Java code to kotlin code [closed] I'm starting with kotlin and I have this code in Java which would manage a check and subsequent update of the app from a server itself. But I can't convert it correctly to Kotlin (the automatic converter of Android Studio gives me problems and breaks the code). Could someone help me to convert it to Kotlin? (excuse my English, I don't speak it fluidly) MainActivity package com.example.autoupdate; import android.content.Intent; import android.os.Bundle; import...

How to abstract type convertion function properly? I have a lot of methods that look like that: override suspend fun getBalance(): Result = withContext(Dispatchers.IO) { Log.d(TAG, "Fetching balance from data store") val balance = balancePreferencesFlow.firstOrNull() ?: return@withContext Result.Error(CacheIsInvalidException) return@withContext when (balance) { is Result.Success -> { if ((balance.data.timestamp + ttl) balance } } There I am collecting a Flow of some type from DataStore, then if...

Attempt to invoke on a null object while destructuring in a for loop How is this even possible? On a background thread, I'm running some computation that populates a list, then invalidates a view, and the view runs onDraw. var list = mutableListOf() ... generateBgData() { list.clear() list.add(...,...) invalidate() } In onDraw, I make a copy of the list, so as to prevent updates to the list from causing errors, val listCopy = ArrayList(list) for ((point, str)in listCopy) { // Null exception thrown here canvas.drawText(...) }...

.android\repositories.cfg could not be loaded Have reinstalled android studio and created new project but the problem persists . This is what the error is ! File C:\Users\admin.android\repositories.cfg could not be loaded. Checking the license for package Android SDK Platform 29 in C:\Users\admin\AppData\Local\Android\Sdk\licenses Warning: License for package Android SDK Platform 29 not accepted.

Android Camera2 capture burst too fast on Pixel 3 I am trying to capture a burst of pictures using the Camera2 API(mostly based on the camera2basic code). I have managed to obtain decent frame rates on Huawei P30 Pro and it works well, but on the Google Pixel 3 the frames are saved from time to time with timestamps that show a difference of only 1-2 milliseconds between them. This seems almost impossible, to have a fps of 500. I am adding the timestamp and creating the file in ImageReader.OnImageAvailableListener, to be then saved through a...

Unable to resolve cinterop IOS import in Kotlin Multiplatform I have followed the Kotlin documentation for adding iOS dependencies. In my case the dependency is a pre-compiled framework provided through a third party. So I have followed the case for framework without cocoapod. I placed my MyFramework.def file in /src language = Objective-C modules = MyFramework package = MyFramework Then I added the following to the build.gradle.kts in the Kotlin object ``` ios { binaries { framework { baseName = "shared" } } }...

Arrow lens won't let me set a nullable property to null Given this (overly simplified) code : @optics data class MigrationStatus(val token: String?) val m = MigrationStatus(null) I can call val m1 = MigrationStatus.token.modify(m) { "some token" } But as the argument type is a non nullable String, how can I modify token back to null ? Of course val m2 = MigrationStatus.token.modify(m1) { null } does not compile. The same happens when changing token type to an Option, but I avoided it as it is now <a...

How to reshape array by using kotlin like Python numpy? I use tensorflow lite(kotlin android) and get output like this:[1,256,256,1], kotlin type is Array, this output is grey-scale map, now I want get output max and min and change it to [256,256], type: Array, when use python numpy, it easy, how to reshape array by using kotlin/java on android? foreach performance is poor.

ViewPager throws Null while in fragment I am trying to do a tab Layout in fragment ( One fragment will have 6 in side him changing) and when i set viewPager.adapter = adapter , It throws me NullPointerException private fun setUpTabs() { val adapter = ViewPagerAdapter((activity as AppCompatActivity).supportFragmentManager) adapter.addFragment(PizzaFragment(), "Pizza") adapter.addFragment(FoacciaFragment(), "Foaccia") adapter.addFragment(CalzoneFragment(), "Calzone") adapter.addFragment(PanuozzoFragment(),...

How do I change the total and count in the activity by clicking the increase or decrease button in the recycler view item? Each recycler view item has an increase or decrease button. If you look at the code I wrote, it shows the count and total for the selected item. It is the activity that shows the final amount and quantity, not the recycler view. I want to update the count and total in the activity upon clicking the increase or decrease button in the recycler view after selecting the item checkbox. Also, how do I update the sqlite database count and price according to the increase and decrease buttons in the...