runOnUiThread is not calling localChatManager.addIncomingListener { from, message, chat -> Log.v(TAG,"listener") //You can't modify views from non-UI thread. this@chatActivity.runOnUiThread { object :Runnable{ override fun run() { Log.i(TAG,"runOnUiThread") } } } } I am not able to figure out why runOnUiThread is not working but outside of that method everything is working as...

How to create reusable interceptors in ktor? In ktor, it appears the way to do customized permissions checks is through interceptors, like so: route("/portal") { route("articles") { … } route("admin") { intercept(ApplicationCallPipeline.Features) { … } // verify admin privileges route("article/{id}") { … } // manage article with {id} route("profile/{id}") { … } // manage profile with {id} } } What is the best way to extract the interceptor logic for reuse for other routes elsewhere in the codebase?

Paragraphs in android string resources not rendering in textview views I tried to create a text with separate paragraphs in a string resource. The Android documentation states that is supported, but it is ignored. I can insert a \n, but that doesnt insert any space between the paragraphs. I use \n\n as a work around, but 2 newlines simply wastes too much vertikal space. Can I post-process the string in kotlin to fix that? Lorem ipsum dolor sit amet,...

How do i get the lyrics of a song if I use a API for Songs? I am Making a Music Streaming App most of it is Done but there is just one problem. I am stuck at the lyrics part I have been trying to find a way if there is lyrics that i can get with the API that I use. By the way I am Using Napster Music API for my app https://developer.napster.com in the API I dont get the song with lyrics. So can i Use other API's for lyrics. I tried to use one named Musixmatch but didnt work. Any...

How to have big title below toolbar by default and when user scrolls title needs to go to toolbar in kotlin I had tried by using collapsing toolbar it is not worked since it had fixed toolbar height.

Rate app multiple times in google play problem? I have an android app that i need to add a rating popup to so i used below code fun showRate() { AppRating.Builder(this) .setMinimumLaunchTimes(5) .setMinimumDays(4) .setMinimumLaunchTimesToShowAgain(5) .setMinimumDaysToShowAgain(10) .setTitleTextId(R.string.RateMessage) .setStoreRatingTitleTextId(R.string.ClickRate) .setStoreRatingMessageTextId(R.string.EmptyMessage) .setRatingThreshold(RatingThreshold.NONE)...

Is there a way to check if user has scrolled before Is there a way in Kotlin and jetpack composes Lazylists to check if the user has scrolled the list before checking if it stopped? I know that there is a state of isScrollInproggress but if you ask if !isScrollinproggress then this will be true from the start before the user has eaven scrolled once. So my question is is there like a scrollended state to get a hold of or am i screwed?

hiltViewModel<ViewModel>() vs by viewModels() (This might not be relevant, but I haven't been able to find the answer anywhere and it's been bugging me) While creating and reviewing applications that use dagger-hilt I noticed that most people, to create an instance of their viewModel class, use something like val viewModel: XViewModel by viewModels() and some use val viewModel = hiltViewModel() is there any difference between those two?

How to observe livedata of nested relation pojo android room The schema of my Database has 4 tables Server, Sites, Groups and Messages. Every Server has many Sites and every Site has many Groups. There is a POJO called GroupItem that holds the Group and the unreadMessages of the Group. data class GroupItem( @Embedded val group: Group, @ColumnInfo(name = "unreadCounter") val unreadCounter: Int ) The unReadCounter field can be found only with a join with the Messages table. I also have a POJO that holds a Site with its GroupItems...

How to remember preference change throughout app I'm looking to ensure my app always remembers a preference whenever a change by the user occurs. when this particular preference option Switch is OFF: ... ... I want this change to be remembered throughout my time using the app (including when I navigate to a different screen), and to hide the image views (located in a completely different screen): ... <a href="" rel="nofollow...

How to correctly inflate menus for an action bar from viewpager fragments I have my viewpager as follows: val pagerAdapter = ViewPagerAdapter() viewPager2.apply { offscreenPageLimit = 2; adapter = pagerAdapter } override fun createFragment(position: Int): Fragment = list[position].fragment So all fragments are inflated from the start. But I don't know how or where to inflate the menu for my action bar from each fragment. Because if I inflate it like this: override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?,...

Kotlin Not able to recognise Deferred/Promise/Future values in a map which has Values as String or Deferred Value val varToValue = mapOf("@id" to arg.userId, "@salary" to arg.salary) for (variable in varToValue.keys) { fieldData = fieldData.replace(Regex(variable),if(varToValue[variable] is String) varToValue[variable] else varToValue[variable]?.await() ?: "") //here } Here fieldData is a string which might contain @id or @salary. arg.id is of type String and arg.salary is of type Deferred. Now the line where I call the replace function is not able to identify...

How to create application scooped pool of jobs to avoid duplication of network API call in android How to create application scooped pool of jobs to avoid duplication of network API call in android. Lets assume my NetworkManaget has methods called getData(uniqueId: String): List and let's say multiple screen is calling getData(uniqueId) method from the same requests at the same time. Here requirement is, NetworkManaget should not make duplicate API call however it should serve the results to all screens.

Android Studio: Adding Kotling to existing Java app ends up in "Internal error: unexpected lint return value -1" when building I'm adding Kotlin to my existing Java app (I first have to say I've already done it to another of my apps with no problems at all) and after following all required initial steps I always get an "Internal error: unexpected lint return value -1" with no error details when building. This is the relevant part of my project's grade file: buildscript { ext.kotlin_version = '1.7.0' repositories { jcenter() mavenCentral() google() } dependencies {...

How add a image switcher in a kotlin app? Hello everyone I'm a young developer and I'm making an app where I want to use a image switcher but I've looked on internet and everything I've tried make the activity crash. I'm using kotlin Anyone can help me please?

App keeps crashing and Logcat states "lateinit property todoAdapter has not been initialized" This is the Main activity for a simple todo list app if you want to see more of the code then please let me know When private lateinit var todoAdapter: TodoAdapter is removed app no longer crashes but the app will no longer show the todo item on the recycler view "package com.example.todoit import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.text.TextUtils import android.widget.Toast import androidx.recyclerview.widget.LinearLayoutManager import...

why when restarting the app, onboarding screen shows again in android jetpack compose? I have onboarding screens in my android jetpack compose project, and when I close and restart the app again, I see onboarding screen again, I try to use some of code from this example, but it is throw error for getOnboardState(), showSpinner(), navigateToOnboarding(), showContent(), as a Unresolved reference I do not know what I missed in my code, any idea? @AndroidEntryPoint class MainActivity : ComponentActivity() { enum...

how to save an object in object in real-time database, Firebase (kotlin) I would like to save data into the real-time database of Firebase, but I run into a problem. I've only been working with Kotlin for 1 month, and unfortunately I don't know how to save data to the real-time database in this form, as shown in the picture. My current code is this: data class userData( val username: String, val uid: String, ) database = FirebaseDatabase.getInstance().getReference("Userdata") val user = uid?.let { userData("Test1", it) } if (uid != null) {...

How do I implement that a fragment doesn't get saved onto the backstack? I work on an app and this app has a list fragment as the starting point when you open the app. Now when I click on a listItem an update fragment opens and when you press the save button you go back to the list fragment. The problem is that when I now press the back button on my phone in order to exit the app that doesn't happen and instead I go back to the update fragment. I would like to make it so that the update fragment doesn't get saved onto the backstack or at least I think that might...

Android Kotlin: Not being able to use registerforactivityresult After migrating this next Java class: public class ImportExportActivity extends BaseActivity { private String filename; private static Intent oData; private ActivityResultLauncher activityResultLauncher; private ActivityImportexportBinding binding; @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setImportDataActivityResultHandler(); } @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)...

Color of GradientDrawable not visible in SwipeToEditCallback in android I am using the swipe to edit/delete feature for the recycler view and want the drawable to be curved so for the SwipeToDeleteCallback.kt I used GradientDrawable() as it allows rounded corners package com.example.happyplaces.utils import android.content.Context import android.graphics.Canvas import android.graphics.Color import android.graphics.Paint import android.graphics.PorterDuff import android.graphics.PorterDuffXfermode import android.graphics.drawable.ColorDrawable import...

how can I solve this error (Unresolved reference mariuszgromada) [duplicate] // this is the main activity.kt the error is (Unresolved reference mariuszgromada) how can I solve it please help!! How do I fix this Unresolved reference mariuszgromada error, I write this code 2 times and the same error is exits and thanks for your effert anybody explain please! anybody help please! I don't know why the error is exits package com.example.calculator import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import androidx.core.content.ContextCompat...

How to move an existing Line shape in java using a mouse? I would like to drag a selected line, but I'm unsure how to do it. I tried the following but it doesn't work and the line doesn't move correctly. What calculations am I missing? var deltaX = mouseEvent.x - (line.startX + line.endX) var deltaY = mouseEvent.y - (line.startY + line.endY) line.startX = line.startX + deltaX line.startY = line.startY +deltaY line.endX = line.endX + deltaX line.endY = line.endX +deltaY

Errors during flutter app build. "Kotlin: Unresolved reference: embedding" and "Kotlin: Unresolved reference: FlutterActivity" As in title I'm getting errors during flutter app build. I already tried this solution And when I'm syncing all dependencies and all stuff in android folder I'm getting error: "Could not create task ':generateLockfiles'." I tried multiple solutions from forum and sometimes they help(sometimes because it's temporary to point when I'm creating new project with...

How do I implement PostGIS database to my android app in kotlin? I am trying to create an app in kotlin to draw lines and polygons on google map and save it to PostGIS database. I am still wondering how that could be done. Suggestions would be highly appreciated. Thanks

How to make the soft keyboard hide when clicked outside of the focused EditText BUT not if another EditText is clicked? I want the focused EditText to lose its focus and the soft keyboard to hide when clicked outside the EditText box BUT only when another EditText is not clicked, so these are the scenarios: The EditText is focused, another EditText is clicked - lose first EditText's focus BUT don't hide the soft keyboard as another EditText's focus is requested. The EditText is focused, some other part of the Layout is clicked - lose EditText's focus AND hide the soft keyboard as none of the EditTexts is...

Spring Data Reset - how to create an object with relationships in one request? @Entity @Table(name = "distributor") class Distributor : AbstractEntity() { @Column(nullable = false) val name: String? = null @OneToMany(mappedBy = "distributor", cascade = [CascadeType.ALL]) @RestResource var managers: MutableList? = null @OneToMany(mappedBy = "distributor") var catalog: MutableList = mutableListOf() } @Entity @Table(name = "distribution_manager") class DistributionManager : AbstractPersonEntity() { @ManyToOne @JoinColumn(name =...

Callback function not called in second times I have use Couchbase for my database. Short story is, i created callback function when replication has been success that callback will be called. After trigger it, activity that listen this callback will be got return value. Fyi, couchbase have push & pull replication data that activate by calling their listener function. In my case i only use pull replication listener. This listener will be stopped when they had listen all data from db. And this when it is stop, will be trigger my callback...

What is the meaning of following function parameter signature onChanged: ((Int?) -&gt; Unit)? = null? I have a function with several parameters. One of these paramters is private fun mySpecialFunction( variable1: Int, onChanged: ((Int?) -> Unit)? = null ) Later in the function it is invoked like: onChanged?.invoke(2) And on the upper calling site, it is called like: mySpecialFunction( variable1 = 1, onChanged = { // do something with the number invoked above } ) How is this usage of onChange called in Kotlin?