Kotlin AndroidStudio Type Mismatch I get some error in my code, Type mismatch. Required : FavoriteData, Found : FavoriteData? for the lines dataFavorite = activity!!.intent.getParcelableExtra(EXTRA_NOTE) as FavoriteData and Type mismatch. Required : UserData, Found : UserData? for the lines dataUser = activity!!.intent.getParcelableExtra(EXTRA_DATA) as UserData. Here is my class : class FollowersFragment : Fragment() { private var listUser: ArrayList = ArrayList() private lateinit var adapter: FollowersAdapter private var...

Take ScreenShot of Visible screen Android I want to take screen shot of any visible screen from background. I don't want to be dependent on activity context. Whatever screen I open in my device like browser or any social app I just want to take screenshot of that. I tried different approaches but it is depended on activity and we can only take screenshot of current App. Any help would be appreciated. thanks

Json format got swapped after writing back into the file in kotlin/Java we are reading the JSON file using the json.simple and updating some fields and writing back to the same file location . before writing back to the file location we are doing the pretty format of JSON object , but whatever initial JSON format in file got swapped(up and down of keys) after pretty format the JSON object in java/kotlin, we used the GSON and json-io approach to use pretty format. NOTE: my json file having 1000 lines and it may increase in future before reading : { "angh": {...

Is there something similar to OPENJSON in android? OPENJSON is a table-valued function that parses JSON text and returns objects and properties from the JSON input as rows and columns. OPENJSON I want to deserilize Json into objects, but I want to access parts of the Json not parse it all. I'm using android Kotlin with Room database, if there is a solution in Room maybe.

Android: subscriptionManager.getActiveSubscriptionInfoList() gives null, although SIM is present Using SubscriptionManager for fetching sim details, but for few users subscriptionManager.getActiveSubscriptionInfoList() is returning null(READ_PHONE_STATE permission is granted). val subscriptionManager: SubscriptionManager = (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE); val subscriptionInfos = subscriptionManager.getActiveSubscriptionInfoList(); Is there any other way to fetch sim details?

How to set actionbar title in the Fragment programmatically if I need to go to roomDatabase and jetPackDatastore for the values for it? I try to set title on the toolbar by choosing category of that the fragment shows, for this I need to go to the jetPack dataStore to take the catigoryNumber: Int and use this int to fetch the respective categoryName from roomDatabase; I wrote the code (look the code on the Fragment below) and the title has become "StandaloneCoroutine{..." (and I don't see what is written next 'cause of not enough place in the toolbar). How to set the title I need? Appreciate any help In Fragment:...

Native VisxAdManager in Flutter I would implement visxAds (from instruction https://support.yoc.com/android-sdk/integration/configuring-the-ad-unit/) in Flutter app. I don't know if this is possible. In that instruction (configuring the ad unit) is native android (kotlin) code but not exist instruction for Flutter (dart) code. I need help. In that instruction is code: but in Flutter I don't do write like this.

Kotlin opening new fragment in nav drawer example I'm relatively new with Kotlin and I'm trying to extend the navigation drawer example by adding a button into my fragment that can open another fragment directly without having to select it from the navigation drawer. Here is my button listener in my fragment's onCreateView function: addButton.setOnClickListener() { Toast.makeText(this.context,"ButtonPressed",Toast.LENGTH_SHORT).show()...

Getter for externalMediaDirs is depracated I want to store some images in external media directory - I tried using getExternalFilesDir() but then I can't copy images to that folder and I want user to be able to do this. So I used getExternalMediaDirs(). But now I want to use that path in fragment so I have: val pathImg = context.externalMediaDirs.firstOrNull().toString()+ "/" + "Images" and this tells me that getter for externalMediaDirs is depracated. So my question is how to do this without using deprecated methods.

A real life example for naming packages [closed] I've looked at how to name packages, but most of the answers or explanations were about the syntax(upper-lower case, hypens, etc.), and there were some with examples, but they were usually really formal names like "com.org.utility". If I want to create something, I would like it to be organized, but I personally don't know by what should I organize my classes (like by function, or properties, etc.). Let's say I want to create a library management system, a classical example. Are there any...

Lint checking doesn't work for Java but works for Kotlin in Android Studio I've been using Kotlin for a long time, but recently I opened a java project and I noticed that Android Studio isn't recognizing the java code properly as the same as Kotlin. for example when I write java code the lint checking isn't working at all. I'm having a hard time knowing what errors I made and what classes need importing and even the code style isn't applied as the settings.! On the other hand, when I create a Kotlin class on the same project, everything works well. I've tried...

Android check internet connection after minSdkVersion 21 -> Android 5.0 (API level 21) Android check internet connection after minSdkVersion 21 -> Android 5.0 (API level 21) Check internet connection (Android) with the library.

How to separate business logic from representation? Assuming I have the following class: data class Email(val id:String, val from:String, val to:String, val cc: List =listOf(), val bcc: List = listOf(), val title: String?="", val message:String?="", val evaluation:Int?=0) I have this data in different formats, json, txt, csv etc. I want to make an importer for each format. The first option would be to add as many companion objects as data formats. The problem is that the API of the class will be cluttered with...

Is it possible at all to have a frequently and precise triggering timer with android in deep sleep? I wanted to create a little app that triggers a timer in a sequence of different times (from a few secs to several minutes or even more than one hour) also when the device is in deep sleep because the power button is pressed. I tried with CountDownTimer which works fine, but only until I press the power button. After that timing is a big mess and far away from the given sequence. I read about Handler and postDelayed would be my friend but it uses upTimeMillis which does not go on counting...

Recycler view - on a null object reference I have bottom sheet view and recycler view in it. It's written in Kotlin. I'm trying to show the list of comments. I get null pointer exception when trying to show the bottom sheet and apply recycler view data. My error is - Attempt to invoke virtual method 'void androidx.recyclerview.widget.RecyclerView.setAdapter(androidx.recyclerview.widget.RecyclerView$Adapter)' on a null object reference. Other answers don't help. Here is my fragment - class AudioFragment :...

intellij kotlin dependency failed to find premain-class I recently wanted to learn kotlin coroutines and add them to my maven project. I added this to the pom.xml: org.jetbrains.kotlinx kotlinx-coroutines-core 1.4.3 Sounds easy enough but now when I want to start my project I get the following errors: Error occurred during initialization of VM agent library failed to init: instrument Failed to find Premain-Class manifest attribute in...

Fetch data from List of Objects I have a List in Kotlin and it looks like this: Books : 0 -> {id = 1, author="King", title="Shining"} 1 -> {id = 2, author="Brown", title="Da Vinci Code"} I need to have a list of properties of Book I mean : id, author, title as List. I tryed to fetch this like this: books.mapIndexed{index, item -> // here is item.id and item.author but I cant save it to some value } How can I have this data as List? I want to have this data not repeated because when I have 100 Books...

Execute Kotlin equivalent of python list comprehension I have: grid = [[-1 for c in range(n)] for r in range (m)] in python. How could I achieve the same thing in Kotlin?

ItemAnimator for RecyclerView does not work I want to use these animations to animate the items of RecyclerView: https://github.com/wasabeef/recyclerview-animators I have done everything that was required. However when I apply them nothing happens. What could be the problem? I have included it in dependencies: dependencies { implementation 'jp.wasabeefrecyclerview animators4.0.2' } And added to repositories: // Top-level build file where...

reducing list of functions by calling them i'm playing a bit with higher order functions in kotlin. I would like to have a list of functions, and then reduce the list to one single result by calling all the functions in the list and summing them. Something like this: val num = arrayOf(1, 2, 3, 4) val funcs = num.map Int > { x -> { y -> y + x }} val res = funcs.reduce{acc, elem -> elem(1) + acc} But the bottom line here does not compile, and claims that my lambda in the reduction returns Unit, which doesnt make sense to...

Changing the value of an element of an list within a list Kotlin error I have var layout = mutableListOf() and I am trying to replace the element layout[pr][pc] = 0 But I end up getting an error: error: no set method providing array access

Saving and retrieving data in Android private var highScore: Int = 0 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = DataBindingUtil.setContentView(this, R.layout.activity_game) loadData() playGame() } override fun onDestroy() { super.onDestroy() saveData() } private fun saveData(){ val sharedPreferences = getSharedPreferences("sharedPrefs", Context.MODE_PRIVATE) val editor = sharedPreferences.edit() editor.apply{ putInt("INTEGER_KEY",...

How to make a recyclerView scroll to the top position by clicking menu item? I need so that if one clicks the menu item "turn All Words On" (look below), then the view scrolls to the top position. How to do this from the onOptionItemSelected() method and what to type there? Appreciate any help. @AndroidEntryPoint class VocabularyFragment : Fragment(R.layout.recycler_layout), VocabularyAdapter.OnVocItemClickListener { private val viewModel: VocabularyViewModel by viewModels() private lateinit var searchView: SearchView override fun onViewCreated(view:...

Can't switch fragment It is not possible to switch a fragment in several ways when the variable binding exists, how can this be fixed? private val modelView: ModelView = ModelView() override fun onActivityCreated(savedInstanceState: Bundle?) { super.onActivityCreated(savedInstanceState) val binding: FragmentMainBinding = DataBindingUtil.setContentView(this.requireActivity(), R.layout.fragment_main) binding.lifecycleOwner = this binding.viewmodel = modelView...

TextView displays string escapes as normal string When using the escape \n in a TextView, it doesn't add a linebreak, but displays \n on the TextView.

Kotlin can't exit listener My button listener is stuck. I'm running this code inside my appView's "onCreateView" function. For some reason, my program never leaves the "setOnClick" listener and can't reach anything past it. run loop@{ if (arithmetic

Type mismatch: wrong inferred type Given this piece of code, compiled with Kotlin 1.5.0-RC internal fun LookupImpl.setLookupFocusDegree(focusDegree: String) { // The first element represents an Enum val (className, methodName) = if (ApplicationInfo.getInstance().majorVersion.toInt() < 2020) { "com.intellij.codeInsight.lookup.impl.LookupImpl\$FocusDegree" to "setFocusDegree" } else { "com.intellij.codeInsight.lookup.LookupFocusDegree" to "setLookupFocusDegree" } @Suppress("unchecked_cast") val enumClass =...

Referring problem adding a a list to a list in Kotlin If I have the following but how can I get layout.add(startGrid) not to create a reference but instead a new list but of the same elements. As it is right now it's creating a reference. I want to add te same list but not with a reference to the original startGrid Can this be made simpler using Kotlin list comprehension? var layout = mutableListOf() var startGrid = mutableListOf() for (t in 0..n-1){ startGrid.add(-1) } for (t in (0..m-1)){...

Gradle error while building the application Have first module and second module (Phone and Tables Module) gradle one (main) apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' apply plugin: 'dagger.hilt.android.plugin' android { compileSdkVersion 30 defaultConfig { applicationId "com.unique.myapplication" minSdkVersion 21 targetSdkVersion 30 versionCode 1 versionName "1.0" multiDexEnabled true testInstrumentationRunner...

how to launch a coroutine inside a composable in Android Jetpack Compose I created a LazyColumn that is getting the items from the viewModel and every thing is working perfectly, But What I want is when a new Item is inserted to the lazy column I want the the background color of the new Item to be green for 2 seconds and then it turns back to white . And here is what I did to achieve that but the Item keeps being green: @Composable fun SingleItem(item: Item) { val new = remember { mutableStateOf(true) } val color: MutableState = remember { if (new.value)...