How do I correctly return multiple views in Kotlin? I was trying to change ImageView in one Fragment from another file layout. But since this cannot be done without container, I have to create another view value with the inflater method. Then I need to return these view values with the inflater methods. I say right away that the fragment in which the code is presented is manipulative, since the rest of the fragments are associated with it as with the main one. How do I return two views? Or is it possible to somehow change the ImageView in a...

Retrofit2 use cache only when error occur such as Network errors or quota limit reach I need to implement a catch when an error occur like network related or the API limit has been reach. Now I've seen a lot of good samples yet it seems they are both missing something. First in this tutorial the handling of cache is based the network status like if a mobile data or Wi-Fi of the device is on/off. It is not the solution since one can be connected to a...

Check if value contains in List (Similar values) I have a List of numbers where the numbers could be saved in different ways, with or without the prefix like "+391112223214, 7251234785, +393911114578, 052264245" Then i have in input a number which has alway +39 in it or any other country code at this point i have to check if that number exist in the list i've tried to use in but if the number in list is 1112223214 and the one in input is +391112223214 the match will fail when i would that to be a valid check.. Here is what i've tried: val...

how to show list from POST response using retrofit? I want to show response POST from retrofit. I don't really know how because my response are array but with POST. this is how my response looks like { "message":[ "00", "Get Success" ], "result":{ "listProgram":[ { "banner":"", "area":"", "domainlembaga":"", "domainprogram":"", "donate":0 { . . . ] service interface Service { @POST("program/list")...

How to get value from MainActivity from Class Adapter and use in Fragment class File MainActivity.kt class MainActivity : AppCompatActivity() { lateinit var txtvId : TextView lateinit var txtvName : TextView private val SECOND_ACTIVITY_REQUEST_CODE = 0 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) txtvId = findViewById(R.id.txtvId) txtvName = findViewById(R.id.txtvNama) setUpTabs() } //TabLayout private fun setUpTabs(){ val adapter =...

Android schedule job on interval for defined amount of time I'm wondering is there a possibility in some of the scheduling libraries in Android SDK that can achieve this type of behaviour: Schedule some work (ex. ping network) It is executed every X seconds Executions last for Y minutes There are some stuff like ScheduledThreadPoolExecutor and some custom solutions, but how could I achieve this with officially approved libraries? Thanks.

ERR java.net.SocketException: socket failed: EPERM (Operation not permitted) I'm developing an android application with kotlin. I'm trying to reach my local API. I know that I need to use my IP. REINSTALLING APPLICATION IS NOT WORKING Here is my AndroidManifest: Here is my logcat: FATAL EXCEPTION: main Process: com.example.bottomnavigationwithfab, PID: 5621 java.net.SocketException: socket failed: EPERM (Operation not permitted) at java.net.Socket.createImpl(Socket.java:492)...

Does SensorEvent has a initializer? so I am stumbled to a small issue. I was planning to implement a bitmap texts that includes the gps location and it sensors. The location detects no problems even though the code what I am about to share it doesn't get any location coordinates, but that's the purpose of it. However I do have an issue with the sensors. I tried to use the null sequence on the sensor event, without the override fun onSensorChanged(event: SensorEvent?), everything is fine but displays the null results which is...

Seems like Fragment repeat onCreate() method every time I turn the phone and screen changes the orientation or so [duplicate] I am new in Kotlin. Why everytime I turn the smartphone and screeen turns 90 degrees, it calls get4words() method again? I need to call get4words() method only once when the view just created. Why when I open the Fragment first time, screen is empty, then if I turn the phone - orientation changes and 1. The screen is still empty, but 2. In logs I see that (drlr)wordWorkList.size = 4. And then when I turn the phone second time, the cards on the screen appear, but in logs I see that now...

How to dynamically add chip with text from Edittext to Edittext by pressing spacebar? How to dynamically add chip with text from Edittext to Edittext by pressing spacebar? Tried val textWatcher = object : TextWatcher { override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) { lastLength = s!!.length } override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) { if (lastLength > s!!.length) return if (s[s.length - 1] == SPACE) { val chip =...

Google module escaper error on real device Hello i am developing application for android, and i got faced issue. on emulator application is working, but on real device getting this error. Application context is IBM watson Language translator Caused by: java.lang.NoClassDefFoundError: com.google.common.escape.Escaper$1 at com.google.common.escape.Escaper.(Escaper.java:87) at com.google.common.escape.UnicodeEscaper.(UnicodeEscaper.java:59) at com.google.common.net.PercentEscaper.(PercentEscaper.java:85) at...

How to make directory table in Realm I have some data with calendar events. I want to save this data in Realm, but only once (at apps first launch and when this data updates). Is there any good practice solutions for that (exept using exteral databases)?

Find indices of substrings which matches a regex in Koltin I have a string and I need to find the indices of substrings that start and end at a colon ":" Example: String = "Hello everyone emote how are you all? emote2 emote3" Output = [15, 40, 49] I have tried the following regex which works absolutely fine ^(^:)[a-zA-Z0-9_]+[.\:]$ but when I use it in Kotlin findAll function, it returns no result val pattern = "^(^:)[a-zA-Z0-9_]+[.\\:]\$".toRegex() val matches = pattern.findAll(message) matches.forEach { f -> val m = f.value val idx...

Android:E/InputDispatcher Window handle Window has no registered input channel? Window handle Window{b53a4de u0 com.app.appname/com.app.appname.activities.MainActivity} has no registered input channel

What to convert this kotlin function to swift Required help to convert the encryption function to get the same output in iOS app. fun encrypt(text: String, key: String): String? { val cipher: Cipher = Cipher.getInstance("AES/CBC/PKCS5Padding") val keyBytes = ByteArray(16) val b = key.toByteArray(charset("UTF-8")) var len = b.size if (len > keyBytes.size) len = keyBytes.size System.arraycopy(b, 0, keyBytes, 0, len) val keySpec = SecretKeySpec(keyBytes, "AES") val ivSpec = IvParameterSpec(keyBytes)...

Save sensitive data I have an application developed natively for iOS and android , when the users pays an IAP (In app purchase) i save a bool variable that unlocks all app features and removes ads lets call it appRemoveAdds // it's default value is false i store it in user default(ios-swift) / shared preferences (android-kotlin) in iOS i thought of using keyChain for storing that variable only as i have many other settings keys but this is the most important one , Questions are : 1- Should i do this for iOS...

KafkaProducer fails on send() if you read a parameter from GCS I am trying to produce data to a Kafka topic after reading data from an API filtered on on updateDate. After I sent one data object to Kafka topic, I want to save the value of updateDate to GCS such that it can be read from the same storage object for the next read. I managed to get date from GCS object successfully and even read data from API using the same date but my Kafka producer fails on producer.send() and gives error below: Error registering Avro schema: mySchema Caused by:...

Kotlin Performance I'm currently developing a library for android and i have a question that I can't find anywhere, is it faster to have different shapes and layouts and calling said layouts according to a method or just have on layout and change the color programmatically? val d = AppCompatResources.getDrawable(context, R.drawable.success) inflate(context,message,time, "#4caf50", d!!)

how to cast class to ((Int,String) -> Unit ) in kotlin in kotlin i can implement this Invokable ((Int,String) -> Unit ) in class (Int,String) -> Unit without write interface but i need cast object to this Invokable type from another class can you help me

Unresolved reference: findViewById I am currently taking the Google android developer course and was trying to work on the dice app but when calling the findViewById method it keeps giving me an error. I can't figure out why especially since I already called this method for the button. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val rollButton = findViewById(R.id.button)...

kotlin creating visibility by using if condition with time i set visibility to an imageview that disappears when clicked and i want it to be invisible when not clicked along 1 second. thanks in advance. [i dont want to use postdelayed because it doesnt work fine here so i want to do that with if statement] fun hideImages() { runnable = Runnable { for (image in imageArray) { image.visibility = View.INVISIBLE } val random = Random() val index = random.nextInt(8 - 0) imageArray[index].visibility...

How to schedule a task with a timer How can I schedule a task that checks if a value is true once every 2 seconds? I am doing this: suspend fun a() { while(true) { if(isReady()) { break } delay(2000) } doWork() } I feel there should be a more idiomatic way to do this. I cannot change isReady() so a callback is not possible. Would like to use coroutines. Also, TimerTask has given me issues in the past with different devices.

Alternative to VisionKit VNDocumentCameraViewController on Android Platform I have implemented the VisionKit VNDocumentCameraViewController that is used in the notes application on iPhone .. which works quite well. Takes several picture and then straitens them, But I wonder if there is anything like this control for Android? I have tried to google it, I really have but I just can't find anything that work the same. Do you guys have some experience with this?

Why is room data coming back null from observer? I keep running into this problem. I have some data that is being recorded in one screen and then I have a viewmodel that will access the data on a different screen so i can build a graph on the UI. The UI is a recycler view that builds a chart for each of a number of items. There is a when statement in the OnBindViewHolder function that checks what type of item it is, and then calls a function like this one: private fun makeRadGraph(mModel: SquibModel) { if (mModel.expanders.isNotEmpty())...

determine if two cyclic times overlap I have been stuck on checking overlapping times. My calendar implementation allows for cyclic or wrap-around time (so having start time after the End time is possible) For example: startTime = 3:30PM, EndTime = 3:29PM, TimeDuration = 23 hours and 59 minutes Some of the answers I found online work when the End Time comes strictly after the start time. How can I fix this? I am using this StackOverflow solution but it's not fully working: <a...

Kotlin extract letters and keep only numbers in a String I have a string that is "M456456" for example, and i need to keep only the numbers. So the ouput has to be "456456" How can i achieve this in Kotlin?

Open keyboard when launch an activity I have a button that launchs an activity. I want to keyboard opens automatically when this activity is launched and focus on a EditText.

How to get auto-imports with Kotlin in VSCode Is there a way to get VSCode to auto-create import lines in Kotlin? e.g. User enters val thread = Thread()" in Kotlin source in VSCode User invokes auto-importer via hotkey or whatever VSCode automatically inserts import java.lang.Thread at the top The Java extension has one that does exactly this (with alt+shift+o). Surely there must be a Kotlin extension for this.

Firebase saving String as Long why is firebase saving coordinates that i convert to string as Long? I convert them like this: update("latitude", latitude.toString(), "longitude", longitude.toString()) and i can see them as Strings in firebase but when i retrieve them with a snapshotListener at first they come in as Long causing my app to crash then they turn into String. Here is the log 2021-04-08 140529.089 21864-21864/com.crynet.overseer...

Android Retrofit NetworkBoundResource returns null I am trying to retrieve data from a third-party API using Retrofit and NetworkBoundResource (https://developer.android.com/jetpack/guide#addendum). However when this NetworkBoundResource runs it returns null. The JSON I'm trying to fetch is as follows: { "id":93 "name":"Business" "total":587 "has_next":true "podcasts":[] } Hoping someone can help!...