android kotlin intent eror ( on a null object reference) on my android studio project so i add intent on my android studio project , and when i run my code i get eror on my logcat , i use this tutorial for my intent https://gist.github.com/EmmanuelGuther/1fde5cfbd1cdcd21cd852e3bb5716e02 and i use android studio version android studio version 3.6.3 and i use fragment to add intent , this is my FragmentHomeActivity : class HomeFragment : Fragment(),...

Cannot parse json objects with GSON when setting minifyEnabled is true When I use buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } everything works perfectly. But if change to buildTypes { release { minifyEnabled true useProguard true shrinkResources true proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } I get a...

Calculating a percentage of a number [duplicate] I have an app where i want to implement a chart , i have three values total , death cases and the recovered ones , so the numbers are as follow : Total : 14890035 Death cases : 614124 Recovered cases : 8943850 what i basically want to do is to calculate the percentage of deaths cases and recovered ones off the total so my chart will only have two percentages ( death and recovered ) This is what i tried so far but it is not giving me accurate percentages val main_deaths =...

Display List in Kotlin from API Im working on a weather App trying to display every data the Api provides. Everything works prefectly fine but displaying the forecast data. So what im trying to do is : Fetch the data companion object FetchWeatherData { val TAG: String?=FetchWeatherData::class.java.simpleName private val apiRequest: WeatherService = RetrofitRequest.getRetrofitInstance().create(WeatherService::class.java) fun getCurrentWeatherReport(app_id: String,q: String,lang: String,units: String,...

Is there any API for getting Google forms responses in Android App? I have a Google form and i want to fetch it's responses into my Android Application. Is there any solution or API for this? I have searched many solutions but there not working.

Log levels and their use Overview: Logs makes software much more maintainable but requires some diligence because the value of individual Log statements may change over time as programs evolve. The best way to achieve this is by getting the dev team in the habit of regularly reviewing logs as a standard part of troubleshooting customer reported issues. Encourage the team to prune out Log messages that no longer provide useful context and to add messages where needed to understand the context of subsequent messages....

why admob stopped working after pushing an app update? My partner deployed an android game and integrated admob, all was working fine, but after pushing a new app update it stopped showing ads, also no error is displayed on her admob account. any idea what it might be the error code is 3, however all other apps are showing ads at her location.

android intent eror (on a null object reference) kotlin prgraming language i creat my code on android studio use kotlin programin language and i use android studio version android studio version 3.6.3 i use android api version 30 android api version 30 i use this intent code for my project buttonAdroid.setOnClickListener{ requireActivity().run { startActivity(Intent(this, ActivityAndroidDeveloper::class.java)) finish() // If activity no more needed in back stack } } and this is my id (buttonAndroid) on my file...

ConcatAdapter with multiple horizontal lists I need to show a list of items horizontally inside a vertical list. So I used ConcatAdapter to concatenate multiple adapters. The vertical list uses a RecyclerView with the ConcatAdapter as adapter. Then for each horizontal items list I have set an adapter. But there comes a lot of issues: Horizontal lists are duplicated because I'm returning data.size in getItemCount. If I manually provide an arbitrary number in getItemCount, functions that rely on position are throwing exception:...

Crash in coroutine My function is quite straightforward, Main Thread: Initializes a variable -> Background Thread: Fire network request, assign the result back to the previous variable -> Main Thread: Display that variable Code below: suspend fun createCity(context: Context, newCity: MutableLiveData, mapBody: Map, token: String) { lateinit var response: NewIdea try { withContext(Dispatchers.IO) { val map = generateRequestBody(mapBody) response =...

Prevent the keyboard from opening automatically SearchView good morning, I have problems preventing the keyboard from opening automatically when I start an activity. I have already implemented these three options. Manifest change in android:windowSoftInputMode="adjustPan|stateHidden" SOFT_INPUT at onResume method. window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN) cleaning the focus of the SearchView. searhView?.clearFocus() Any advice? Please.

Upload multiple images(nearly 100) from Android to Amazon S3? I am trying to upload multiple image to amazon s3 bucket. The size of the images which i am trying to upload is nearly 300KB each. I am using loop to upload the images. But it's taking more time compared to ios. I am using the below code to upload the images to S3. val uploadObserver = transferUtility!!.upload(resources.getString(R.string.aws_image) + "/" + AppPref.getPrefString(this, AppPref.DEALERID) , "img_$timeStamp.jpg", File(fileUri.path!!), md,...

How to change visibility of button in activity from activity recycler adapter I want to change the visibility of "Proceed to card" button, to visible when the user clicks on add button and back to invisible when all the items got removed : VISIBILITY is set to INVISIBLE in layout I have added a count variable to compare RestaurantMenuRecyclerAdapter.kt package com.himanshu.hungerhunt.adapter import com.himanshu.hungerhunt.R import com.himanshu.hungerhunt.model.FoodMenu import...

startActivity not working inside onMessageReceived I know there are many thread discussing this problem. I have tried almost all of solutions on that threads, but unfortunately that didn't work in my case. Basically, what I want to do is, I want to start an activity immediately after onMessageReceived is called without issuing notification. This is my code: override fun onMessageReceived(p0: RemoteMessage) { super.onMessageReceived(p0) "new notif".ea() val data = p0.data val title = data["title"] val body = data["body"]...

GridView cannot be cast to ViewPager in Kotlin Custom Calendar Working on the custom calendar in Kotlin. On tapping the DateText, this custom calendar widget will be opened in a new fragment. I used Grid Views to display the dates and I'm getting ClassCastException on navigating to the Calendar Screen(GridView cannot be cast to ViewPager). Error: Caused by: java.lang.ClassCastException: com.daimler.myfinance.payment.paymentdate.extensions.CalendarGridView cannot be cast to com.daimler.myfinance.payment.paymentdate.extensions.CalendarViewPager at...

Cast generic type as non-null with Any upper bound I’m trying to use a reified type parameter to check if the type argument is nullable, returning a different class implementation based on the nullability of the type argument. This works well, except for the non-null subclass requiring its generic type to have a non-null Any upper bound, in order to have a KClass constructor argument. This code works as expected: interface Test class NullableT : Test class NonNullT : Test inline fun test(): Test { return if (null is T) {...

Difference of between List and copyed MutableList I copyed List type variable to new one of MutableList type, then updated value of new one's item. But origin variable was updated too. Are these point to same address? Why? var foodList = listOf( FoodModel("curry", 2000) FoodModel("rice", 1000) ) // copyed foodList to new variable MutableList type val tempList = foodList as MutableList Log.e("weird", tempList[position].name+" "+tempList[position].price) Log.e("weird", foodList[position].name+" "+foodList[position].price) //E/weird:...

Why is there code that is executed when the thread is blocked using coroutines? Why does it print 'a' after 1 second if the thread is blocked for 3 seconds? When a thread is blocked it can't do any computation until it is unlocked. How come is it possible to execute println('a') while this thread is blocked by Thread.sleep()? import kotlinx.coroutines.* fun main() = runBlocking(Dispatchers.Default) { GlobalScope.launch(Dispatchers.Default) { delay(1000L) println("a") } Thread.sleep(3000L) }

I am Integrating Youtube Live Streaming API in android App, wants to get LiveChatMessages but not able to get it I am trying get Youtube LiveChatMessages in android App but not able to get it, If anyone have any idea regarding this

Stop notification ringtone with dialog is there any way to stop notification when receiving intent from the broadcast receiver? here is my NotificationReceiver class NotificationReceiver.kt class NotificationReceiver() : BroadcastReceiver(){ override fun onReceive(context: Context?, intent: Intent?) { val localData = LocalData(context!!) val falak = FalakLib() val sharedPref = SharedPref(context) val sharedPreferencesSetting = PreferenceManager.getDefaultSharedPreferences(context) val modeDariSetting =...

In the project, it doesn't see library imports in a separate module In the project, in a separate module, it doesn't see imports from a third-party library, but it mostly recognizes them \src\main\java\com\bigmeco\server\HostApi.kt: (3, 12): Unresolved reference: koushikdutta :project buildscript { extra.set("version", { it: String -> rootProject.extra.get(it) as String }) extra.set("kotlin_version", "1.3.72") extra.set("compose_version", "0.1.0-dev14") extra.set("coroutines_version", "1.3.7") extra.set("koin_version", "2.1.5") repositories {...

how to convert kotlin code .map into c# code I have alredy tried google for .map use please guide me private fun readData(mydata: String, showZeroHundred: Boolean): String { val (a, b, c) = mydata.map { it - '0' } return when { a == 0 && b == 0 && c == 0 -> "" a == 0 && showZeroHundred -> "không trăm " + readPair(b, c) a == 0 && b == 0 -> digits[c] a == 0 && b != 0 -> readPair(b, c) else -> digits[a] + " trăm " + readPair(b, c) } } C# code - private string readData(string...

How to group object by value change so currently my object look like this data class Country( val city: List ) and this data class City( val prefecture: String, val city_code: String, val city_name: String ) The response i got from API is {"city": [ {"prefecture": "Aichi", "city_code": "OKZ", "city_name": "Okazaki"}, {"prefecture": "Aichi", "city_code": "HKN", "city_name": "Hekinan"}, {"prefecture": "Kagoshima", "city_code": "AKN", "city_name": "Akune"},...

do naming rules in kotlin matter An absolute pet hate are naming rules for the sake of it, when development enviroments are so good at letting users know what each item is. As the title suggests are there any pitfalls if a developer were to name all types, objects, variables etc.. 'all in "snake_case", specifically in Kotlin. Ignoring the auto generated names for binding etc.

Screenshot of a View is not has the same size as the view? So, I'm trying to blur out my ContraintLayout what approach I took is Take a screenshot of the root view. Add an ImageView in the root view with layout param MATCH_PARENT and MATCH_PARENT. Blur that screenshot Set the screenshot bitmap to this ImageView. But it's now working as expected. Any help would be appreciated. Here is some relevant code I'm using. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

How to save messages I am creating a messenger app and I would like to save incoming and outgoing messages. At the moment, I am planning to use recycler view to save those messages, but I'm not sure what is the best way to do it. I can think of three ways: SharedPreferences, Internal Storage and SQLite. Could someone tell me, how is the default messenger on our phone store the messages?

Extracting page number from url [duplicate] How can I extract only number of page using regexp or something else. For example I have url http://2.222.22.222:8081/api/?limit=10&page=1 and I need to get only "1"

Effectiveness of ?: , null-safety and Elvis operator? I am referring to the Null-Safety in Kotlin: A colleague of mine writes always like: bob ?: return bob.department ?: return bob.department.head ?: return bob.department.head.name() Readability is his argument. This is for me not very Kotlin like and more overelaborated. Of course I prefer: bob?.department?.head?.name() Some arguments/docs/links not using upper way would be very...

DexPathList error when running project after successful gradle build I have an android application, that makes use of quite a few libraries, and gradle compiles fine with no issues, but when I run my project I get the following error: E/AndroidRuntime: FATAL EXCEPTION: main java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/R$string; at com.google.android.gms.common.internal.StringResourceValueReader.(Unknown Source) at...

Unresolved reference: findViewById on SnackBar Am trying to add a SnackBar that is called when Delete is clicked however I am getting the error 'Unresolved reference: findViewById' when I add the Scackbar to the Delete Menu holder.menu.setOnClickListener { val popup = PopupMenu(activity,holder.menu) popup.inflate(R.menu.dashboard_child) popup.setOnMenuItemClickListener { when(it.itemId){ R.id.menu_edit->{ activity.updateToDo(list[p1])...