How to store retrofit2 API responses in an ArrayList and use it to populate recyclerView in Android Studio Kotlin How can I store responses from api to items array and use it latter val items = ArrayList() for(curr in targetCurrencies) { val request = ServiceBuilder.buildService(ExchangeRateAPI::class.java) val call = request.getNewCurrency(etCurr.text.toString(), curr, etAmount.text.toString()) call.enqueue(object : Callback { override fun onResponse( call: Call, response: Response ) { if (response.isSuccessful) {...

How to replace microphone sound with another source in a camera app i am new to android. In my android camera application i need to change the microphone to another audio source. help me please. =(

Sending data to usb device with android studio I'm trying to create a program in android studio that sends data to USB using the bulkTransfer method and I'm always getting back -1 from the function. I established a connection with permission before trying to send the data. The device that is supposed to receive the data is a raspberry pi pico that uses Arduino IDE. did anyone encounter something similar and know what can be the problem? I tried accessing different interfaces and endpoints for the connection and it didn't help also I tried...

Making a CountDownTimer not pause when activity is paused/backgrounded - Kotlin I'm making an app in Android Studio that includes a CountDownTimer in MainActivity. I have some other activites to show other stuff but when I start the other activities, the CountDownTimer in MainActivity pauses. I need it to keep counting, how can I do that? I haven't tried anything because I couldn't find any suitable solution to my problem and I'm not a Kotlin expert either.

Android 13 my app is crashing when I disable notifications from settings Hello in only Android 13 when I disable notifications for that app the app is crashing in background. Even when I tested with default Android apps such as gmail or messaging app it is like they are restarting but keeps goin on same state(that thing is not happening below Android 13 versions). Native android app with Kotlin. Emulator specs: Android 13 Pixel 3A. Api 33. I tried to disable notifications for app I excpected it not to crush but it did in Android 13(No problem in other versions).

How to pass a list of objects as a parameter to a class. Kotlin How can I pass a list of objecs from main to a class, as parameter? I need to pass a list of employees to PayrollSystem class as a parameter. Could someone help, please? var index = 0 val employees = mutableListOf(SalaryEmployee(index, "blablabla", 0)) val x: String = "0" while(true) { print("Please enter employee name (0 to quit):") var input = readLine()!!.toString() if (input != x) { index++ print("Please enter salary:")...

why am I unable to open a new activity? I am making an app and I cannot figure out how to open one activity from another.... I have a button and when clicked, I want it to open another activity, but it is not working. ///////////////////////////////////////////////////////////////// In my home.kt file, I have: val button3 = findViewById(R.id.button3) button3.setOnClickListener { val Intent = Intent(this, muse_pick_duration::class.java) startActivity(Intent)...

How is Kotlin's Map.foreach better than the Java one? A very simple example: val map = mapOf("one" to 1, "two" to 2) map.forEach{k, v -> if (k == "one") println(v)} //Java API map.forEach{(k, v) -> if (k == "two") println(v)} //Kotlin extension I am confused by the IDE warning Java Map.forEach method call should be replaced with Kotlin's forEach for the second line. I don't understand why should I replace it. They seem to work identically, and the only difference is the java method requiring 2 less symbols to type. Any ideas?

Saving RecyclerView state in a fragment when exiting it I am trying to make a app that sends messages to a recyclerView from fragment to another using a navgraph, but whenever I go back to my previous fragment to add a new message I lose the data of my recyclerView, and does not pile up. ---This is the kotlin code for the first fragment: package com.example.passingdata import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import...

lateinit property mAdapter has not been initialized. How to solve this problem? MainActivity.kt class MainActivity : AppCompatActivity(), NewsItemclicked { private lateinit var mAdapter: NewsListAdapter override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val recyclerView = findViewById(R.id.recyclerView) recyclerView.layoutManager = LinearLayoutManager(this) fetchData() val adapter = NewsListAdapter( this) recyclerView.adapter = mAdapter } private fun fetchData(){...

Add 'Current location' on autocomplete widget list google places Kotlin Does anyone know how I can add 'Current location' on autocomplete widget list

Using LazyHorizontalGrid inside LazyColumn I try to use LazyHorizontalGrid with 2 fixed rows inside a LazyColumn. But then app crashes: IllegalArgumentException: LazyHorizontalGrid's height should be bound by parent This is surprising, as I can use LazyRow inside a LazyColumn without any problem.

Android BottomNavigation showes "Up Button" when navigating between tabs I've sat up a bottom navigation bar in my app. When I enable action bar with navController, the up button shows when navigating between tabs. It goes away when i remove this line in MainActivity but then I lose up button for the whole app:...

Cannot hide back button on action bar My application have two top level fragment A and B controlled by a bottom navigation bar and fragment C can be navigated only from fragment B. I don't want the action bar on fragment C shows back button while it cannot be hidden by setDisplayShowHomeEnabled() or setDisplayHomeAsUpEnabled() How can I hide the back button? class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) {...

Change GlobalScope on Ktor client Websocket [Android] I'm implement Ktor client websocket using GlobalScope coroutine (yes, I know that's not recommended option), but I need to keep alive the socket connection while the app is open because the main functionallity depends of the data from socket. Sometimes when the network is saturated, the socket retrieves the new data with 5 or 10 minutes of delay :(, exists any way to prevent this delays? I think that GlobalScope provoke some leak when the network is slow and data delays ocurrs. That's my code...

Jackon JSON Adding deserializer module doesn't work, but annotation on class does I am trying to implement a custom deserializer and when I try to install it on the ObjectMapper it never gets invoked, but when I use it directly as an annotation on the class, it does. Can someone explain why and how I can actually install it on the object mapper itself? This is never invoked val bug = ObjectMapper().registerModule(KotlinModule.Builder().build()) .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)...

How delete Item from ArrayList in Firestore using Koltin I want to delete one item from the animeId. For example, if I need to remove the animeId[5] or I want to remove the item that the value is equal 5114, how can I do that? I alredy learned how I remove item like the entire animeIdbut not just one item. Here's an print how the database is organized:

How to do an insert if not exists with Kotlin Exposed Postgres? I'm building an expenses tracker app, using Spring Boot with Kotlin to make the API and I'm storing the user data into a Postgresql database. I choosed Exposed ORM to handle all the CRUD operations between Spring and Postgres. To insert a expense into the database the user can select tags to keep a better organization of their expenses. Expenses and tags are a Many to Many relationship (one expense can have many tags and one tag can have many expenses). I have the following code to define the...

How do I run the Google Cloud Functions example project KotlinHelloWorld.kt in IntelliJ on Windows 11? I am developing a Kotlin backend that is going to run in Google Cloud Functions. I am unsing the example code that Google has given, however I do not know how I can run the code on my local Windows 11 machine with IntelliJ. There is no option to run the file. Even when I go to "Run/Debug Configurations" I cannot select the KotlinHelloWorld.kt file as my main class to run. Below is the sample code given from <a...

File not being renamed in Android 10 I wrote a solution for renaming files, but nothing happens in Android 10, although in 11 and above it is renamed normally. public class PathDiv { public static String dev(String path){ return path.replaceAll("^(.)/.?$","$1"); } public static void renameFilesInDir(String path, String dirIn, String ext) { File checkFile = new File(path); if (checkFile.isFile()) { try { checkFile.renameTo(new File(dirIn, ext)); } catch (Exception e) {...

Kotlin ChatApp Block-Unblock user I made a chat app and I want to add the ability to block and unblock other user. I will do this using realtime, I add the other user to my blocklist as below fun blockUser() { binding.blockButton.setOnClickListener { FirebaseDatabase.getInstance().getReference(USERS).child(userId!!) .addValueEventListener(object : ValueEventListener { override fun onDataChange(snapshot: DataSnapshot) { if (snapshot.exists()) {...

How to use the same package name android app in two different build variants but their resource is different I'm developing an application, I have two variants, one that makes the app blue and the other the app red, but I wanted to use the same package name for both, but when I changed variants, they would come with their respective colors. Usar o mesmo package para duas build variantes.

NetworkUtility.shouldRetryException: Unexpected response code 403 excuse me, for the first its works fine,when i click "Tambah data/add data" its force close all of sudden,when i check on log chat its showing this NetworkUtility.shouldRetryException: Unexpected response code 403 for http://10.0.2.3/folder_kerja/koneksi.php koneksi.php was made on separate file,i was trying to connect through mysql could you help me please? heres the code package...

A version of the kotlin compose donut app worked but refuses to show a preview. How do I fix this? class MainActivity : ComponentActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContent { Row() { donut(_size = 100.dp, _padding = 10.dp) } } } @Preview @Composable fun donut(_size: Dp = 120.dp, _padding: Dp = 5.dp) { Box(modifier = Modifier .size(_size)...

In Android Studio, how to pass an image as a parameter to a function with Jetpack Compose? I am making a "business card" app which basically displays my photo with my contact info underneath. The contact info consists of rows, with each row displaying the app icon (eg: Instagram) on the left, and my info on the right (eg: My Instagram username). I've made separate composable functions for each app and called them and it works fine. For example:- @Composable fun InstagramContactInfo() { Row(modifier = Modifier .fillMaxWidth() .padding(start = 30.dp, end = 30.dp,...

I want to create the filter screen same as amazon and flipkart in native android with java or kotlin. How is it possible? so How is it possible? like one side I can use Recycler View and another side Frame Layout but my question is in Frame Layout How can I add dynamic Fragment and Fragment Transaction according to Recyclerview Item? like one side I can use Recycler View and another side Frame Layout but my question is in Frame Layout How can I add dynamic Fragment and Fragment Transaction according to...

Migrating from using activity to fragment, getting E/RecyclerView: No adapter attached; skipping layout when it worked before in MainActivity onCreate I am building a simple movie app in Kotlin (to practice live coding for interviews) from this tutorial: Build a Movie App using Retrofit and MVVM Architecture with Kotlin. Everything happens in the Main Activity onCreate and I wanted to move the functionality to use fragments. I'm currently getting the error "E/RecyclerView: No adapter attached;...

kotlin: putExtra and getExtra doesn't work in MainActivity: var goDiary = Intent(this, CommunityRegisterActivity::class.java) goDiary.putExtra("userId", user.id) Log.d("result", "1 userId ${user.id}") startActivity(goDiary) I send userId data to CommunityRegisterActivity. And in CommunityRegisterActivity: if(intent.hasExtra("userId")) { val userId = intent.getIntExtra("userId", 0).toString() Log.d("결과", "2 userId $userId") } else {...

Unresolved reference: runOnUiThread Am Still a beginner in kotlin and am learning from the https://developer.android.com/ I was following the same steps in the tutorial and I have a problem with both: Unresolved reference: runOnUiThread Unresolved reference: findViewById I have tried to add and apply the plugin: kotlin-android-extensions in build.gradle(module:app) but no luck please help explaining the reason and fixing the problem here is my code class...

How can i replace PowerMockito.whenNew(obj.class).thenReturn() with a function of a Mockk library? I want to remove PowerMockito from poject and replace it to Mockk library Example: `class One { fun doSomething(){ val two: Two = Two() two.f() } } class Two { fun f(){} } If i use PowerMockito, it looks like @Test

fun test {
    val two = PowerMockito.mock(Two::class.java)

    PowerMockito.whenNew(Two::class.java).thenReturn(two)

    val one = One()
    one.doSomething()
    
    PowerMockito.verify(two).f()
}