One to many relationship in Room Database There is an event in my project and there are timelines in this event. Each event has its own timelines. I want to list the timelines of each event with the codes I have written, but I cannot access it via the adapter. My entities; Event: @Parcelize @Entity(tableName = "event_table") data class Event( @PrimaryKey(autoGenerate = true) val eventId: Int, val eventName: String, val eventCategory: String ): Parcelable Timeline: @Parcelize @Entity(tableName =...

Using producer function from parent framework I have a parent framework for my Kotlin application which should hold shared code for my microservices. Now I have a producer function which is the following: import com.azure.core.credential.TokenCredential import com.azure.identity.AzureCliCredentialBuilder import com.azure.identity.ManagedIdentityCredentialBuilder import io.quarkus.arc.properties.IfBuildProperty import javax.enterprise.context.ApplicationScoped import javax.enterprise.inject.Produces @ApplicationScoped class...

Is it possible to track number of created objects and allocated memory by method on Android? I need to get allocated memory size and created object count by a specific method in my Android project. I tried using Android Stuido Profiler tool, but I cant quite get the results for a specific method call. Is it even possibe? What would be the best way to do it?

Firestore query with subcollection reference from parent document My Firestore database structure looks like this (as shown in image) I have a users collection which has a posts sub-collection. I want to fetch(query)all the posts by country(field of parent collection). Edited: I have other's fields too along with country field, so I don't want to duplicate fields in posts sub-collection. Is there any solution without any duplication of fields. My code is below: val query: Query =...

Initializing view binding with requireView() Lately I have become fond of initializing my view bindings lazily using requireView(). To elaborate, I tend to write this: class ExampleFragment : Fragment() { private val binding by lazy { FragmentExampleBinding.bind(requireView()) } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { // make use of binding } } ... instead of this: class ExampleFragment : Fragment() { private lateinint var binding: FragmentExampleBinding...

Firebase get value from one field when searching for different field As of right now I am using firebase to get a user in a "users" collection like this: val query: Query = usersCol.whereEqualTo(USERNAME_KEY, usernameInput) USERNAME_KEY is a string "username" which is the same as in the database usernameInput is the username of the user I'm getting from the database (The primary key is an id that I can't search for) Is it possible to get the value this primary key? or other fields in the same "level" as username, like 'name' or 'password' I'm imagining...

How to fix string size selection error in kotlin? val textoData = itemView.findViewById(R.id.texto_data_abastecimento) textoData.text = abastecimento.datam.toString().subSequence(0..10) val textoHora = itemView.findViewById(R.id.texto_hora_abastecimento) textoHora.text = abastecimento.hodomDm.toString().subSequence(0..5) I'm trying to use only the first 5 characters for display on the adapter and I end up getting the following error: java.lang.StringIndexOutOfBoundsException: length=0; index=6

Implementation of Webhook in android project I want to implement webhook in our android project but I don't know step of implementing webhook in our android project. Is there anyone can tell me the step by step process of webhook implementation in android projects. or give a any link or example android projects for understanding. Thank in advance.

List From Firebase Database not displayed in LazyColumn in Compose The list shows usernames on the console when I use the code below Log.d("read data", "Yay!${bal.displayName}") But when I add the list to the LazyColumn, it doesn't display anything, except the single items i add atop and below the list to check if it was showing at all. Below is my code @Composable fun UsersList(userInf: List) { Scaffold { LazyColumn( modifier = Modifier.fillMaxWidth(), contentPadding = PaddingValues(horizontal =...

How to create a ResponseBody with "entity" tag :) I have built a controller which returns a list of objects fun getUserCommunicationSettings( @PathVariable commId: String, @CommunicationTypeConstraint @RequestParam(required = false) commType: CommunicationType? ): ResponseEntity { return communicationSettingsService.getUserCommSettings(commType, commId) .mapError { mapUserCommErrorToResponse(it) } .map { ResponseEntity.ok(SuccessResponse(it)) } .fold( { it }, { it },...

Android change X, Y coordinates based on Z distance Like in title. I am writting an Android app. In camera.onTouch method I am getting two points (x1, y1 in MotionEvent.ACTION_DOWN and x2, y2 in MotionEvent.ACTION_UP) and drawing it on camera preview. How to change those coordinates based on distance double z (this is distance from camera to object not from point to point)? By changing I mean move closer those 2 points to themselves and further once I change distance. This distance is calculated with benchmark drawn on screen that we know real...

How to disable recycler view auto scrolling? I'm currently working on a kotlin mobile application. The problem I have met is if there are having 3 reviews or above, the recycler view will auto generate a scroll bar on the right side and the display will become not so good. May I know that is there anyway to disable scroll bar of the recycler view so that my layout can view all the reviews by just add a scrollview on the layout?

Fetch Field from Firestore before Firestore RecyclerView Adapter start Listening I want to fetch country value from users collection document before quering firestore recyclerview Adapter start listen on onStart() method. My code is below: postsRef .whereEqualTo("disabled", false) .whereEqualTo("expired", false) .whereEqualTo("country", country) // fetch from users document .orderBy("createdAt", Query.Direction.DESCENDING) .limit(20) override fun onStart() { super.onStart()...

Are there performance benefits from separating data calculations from data formatting in Kotlin app? I have a codebase where all my data calculations and data formatting occur within a single function. Are there any performance benefits to separating these out into separate functions or does separating them only improve readability? I know that I should separate them but I don't really know all the reasons why. Here is the function I am referring to: private fun processData(data: ByteArray) { progressBar.visibility = GONE Log.d(TAG, "displayDiagnosticData: ") val...

RecyclerView doesn't load data initially I made an app from which I get data from TMDB API, everything seems to work but when I start the app, it displays only hint text, after scrolling the View get's updated with the data from the API This is how it looks before scrolling And this is how it looks after scrolling down a a bit This is how I implemented it: HomeFragment.kt class...

How to move to previous edittext on pressing back in android using addtextchangelistener

Why does Android Studio show import... vs. the actual import statements I am new to Android development. At various times I have noticed that the top of a Kotlin file shows import... and I have to click it each time to display the actual import directives. What is that behavior? Why do the import directives not just display each time I open the file?

Exepción de punto nulo [closed] Estoy usando una lista (recyclerview) y selecciono uno de items cargados para ir a otro fragment donde tengo la opcion de seleccionar un item a traves de un boton al cual llamo alimento y me direcciona a un listado. Allí, puedo seleccionar el que quiero y poner la cantidad que necesito. Abro un dialog que muestra un mensaje de confirmación pero cuando doy aceptar me devuelve el siguiente error: E/AndroidRuntime: FATAL EXCEPTION: main Process: com.mundomedicos.fitapp.navigationcomponent,...

Dagger Hilt - calling a function directly vs @Provides I'm using Dagger Hilt. I have a networkModule where I provide my retrofit instance. @InstallIn(SingletonComponent::class) object NetworkModule { @Provides fun provideApi(okHttpClient: OkHttpClient): MyApi { return Retrofit.Builder() .baseUrl(Constants.BASE_URL) .addConverterFactory(GsonConverterFactory.create()) .client(okHttpClient) .build() .create(MyApi::class.java) } @Provides fun provideOkHttpClient(): OkHttpClient { return...

How to get interface instance in koin I have a interface ABC which is implemented in XYZ class, like below: interface ABC { fun method1() fun method2() } class XYZ: ParentClassInterface, KoinComponent { val abc: ABC my inject() fun xyzMethod1() { abc.method1() } } Instead of implementing KoinComponent, i need to get the instance of ABC by using module { single { InterfaceABC() }} and call method1() like above. How to achieve this?

Hilt Inject ActivityComponent dependency into ViewModel I'm newbie with Hilt and have basic question. Input data: I have an AppNavigator that used NavController under the hood class AppNavigatorImpl @Inject constructor( private val activity: FragmentActivity ) : AppNavigator { private val navController: NavController by lazy { val navigationFragment = activity.supportFragmentManager.findFragmentById(R.id.main_navigation_fragment) as NavHostFragment navigationFragment.navController } override fun navigate(payload:...

Parse String to another appropriate type I receive String depends on case: "string" or "381" or "431.2" How can I parse it to String or Int or Double if possible?

Testing a function with a try catch Here is a function I wrote which has a try catch, the function returns a boolean based on that fun myFunction(searchString){ return try { Scanner(searchString).useDelimiter("\\D+").nextInt().toString().length == 5 } catch(e: InputMisMatchException) { false } } I am expecting this function will return either a true or false to the UI for displaying an error to user.This code works as expected too But when I tried to test this using assertFalse by giving an invalid input which...

Global ViewModel for app ui states in Jetpack Compose I'm trying to for example change the title of the appBar or whether the bottomNavBar should be shown in different composables. Since I don't want to pass that viewModel to every composable, I've created a viewModel called AppViewModel and inject it with Hilt to store these values, The mentioned viewModel is like this: @HiltViewModel class AppViewModel @Inject constructor(): ViewModel() { var showBottomNavBar = mutableStateOf(true) } In my main activity @AndroidEntryPoint class...

Kotlin okhttp dynamic header i am using okhttp (not retrofit) to make all my request to the api. It's working perfectly but i am having some trouble to make dynamique header. here is what i did : private fun buildRequest(url: String, methode: Method = Method.GET, filters: Map = mapOf(): Request? { var builder = FormBody.Builder() builder.add("body", "test") val request = Request.Builder() .url(url) .addHeader("API-Key", apikey) .post(formBody) .build() }...

How to assign click events in TabItems? I need to update a list as the user chooses which list to see. I created two items to the TabLayout and I'm trying to get the clik winds but I always get an error. The error: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.material.tabs.TabItem.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Kotlin Recyclerview send data to fragment I have 2 fragment, my BlogFragment has a recylerview , data taken from firebase is displayed in recyclerview. I want to transfer the data in that row to BlogSayfaFragment when each row is clicked. This is my BlogFragment class BlogFragment : Fragment() { private lateinit var binding: FragmentBlogBinding private lateinit var db : FirebaseFirestore private lateinit var auth : FirebaseAuth private lateinit var storage: FirebaseStorage private lateinit var postArrayList: ArrayList private...

Binding Inheritance Scenario: 2 Fragment-classes with different xml-files => 2 different Bindings, but I gave the objects within the xml the same IDs. What I want: to use the binding code in Functions boo() & foo() of A also for B, the only difference is the "Binding-Object" (see the code). Problem: Function boo() and foo() can only access the binding of A. So the attribute "number" in B throws the error when it calls the binding in method boo: "lateinit property binding has not been initialized". Fragment_A:...

How do I set View ids when accessing children of View when using ViewBinding instead of Kotlin Synthetics? I am updating an Android project to use ViewBinding instead of Kotlin Synthetics. I'm having difficulty figuring out how to change the following code so I can access the views from their layout IDs. binding.myLinearLayout.children .filter { it.checkboxInput is CheckBox } In this case children are all generic View types and can't access the checkboxInput IDs like it used to be possible using Kotlin Synthetics. I get the error Unresolved reference: checkboxInput What would be the...

Jetpack Compose LazyList - possible to zoom the center item? I am wondering if it is possible to have a list where you can scroll through - and all the items have a simple view which is shown by default and then a more detailed view which is shown when the item has a specific position on the screen eg. in the center. ------------------------- | + | Item | ------------------------- ------------------------- | + | Item | ------------------------- ------------------------- | + | Item | -------------------------...