How to duplicate Android Screen Saver mode in Android (switching off display LEDs where pixels are black)? This is part of my curiosity, I want to make a simple android app which display few text in the middle with white color in a black background. I am trying this in a OLED display. I want the black pixel completley off. Is there any special method by which I accomplish this.

How to create a custom view in android for swipe direction and positions in android I want to create a widget like this, kindly help me with how I can create it. Actually, I am creating an auto clicker and auto swiper app and I want to define the swipe direction and area using this widget.

How do I reduce the size of a photo when uploading a photo to Firebase storage? I want to reduce the size of the photo when uploading photos to Firebase storage. There is an error in my codes. I wrote a method for sizing. Can you help? (kotlin) auth.createUserWithEmailAndPassword(email, password).addOnCompleteListener { task -> if (task.isSuccessful && task.isComplete) { val userEmailInfo = auth.currentUser!!.email val currentUser = auth.currentUser currentUser.let { firebaseUser -> val storage =...

downloadUrl give empty result I have a function to upload some data to firebase like this private fun addDatatoFirebase(){ val addImage = StorageRef.child(preferences.getValue("username").toString()).child("food_pics/"+UUID.randomUUID()) addImage.putFile(FilePath).addOnSuccessListener { addImage.downloadUrl.addOnSuccessListener { PicUrl = it.toString() } } val dataRef = ref.child(preferences.getValue("username").toString()).child("FoodList/"+UUID.randomUUID().toString())...

Ways to do One-to-many relations in android room I'm looking for a way to create a one-to-many relationship using room. I've seen several examples with two approaches. I don't fully understand them. I didn't write full DAO yet, so maybe I'm missing something there. Approach 1 with @Embedded As in this documentation, the relation is done via @Embedded tag. In this scenario is not needed to set a ForeignKey? How to do a...

Can I import custom classes into Use cases of the Domain layer? When I want to follow the Android Clean Architecture, For example, I create Category as Enum class used on the UI layer for a Todo item's field. Thus, it is considered to using on the UI layer model(Todo) but also the Domain layer model(TodoEntity). When this situation, Can I import the Category into UseCase? In addition, I wonder if it is possible to create a class with data formatting logic of similar logic used in both UI layer and domain layer, or write or import very complex UI layer...

How to call resultLauncher that exists in the activity from a composable function? I'm trying to implement One-Tap together with Jetpack Compose. The startDestination in my NavGraph is a screen called AuthScreen. Inside the ativity I have defined a launcher like this: class MainActivity : AppCompatActivity() { private lateinit var resultLauncher: ActivityResultLauncher override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) resultLauncher =...

How to show and hide FAB in Scaffold depending on LazyColumn 1st item visibility I understand that the following code is required, but how would I use the AnimatedVisibility composable in the case of a FAB inside a Scaffold? val showButton by remember { derivedStateOf { listState.firstVisibleItemIndex > 0 } } AnimatedVisibility(visible = showButton) { ? } Scaffold in MainActivity.kt fun MyScaffold(itemArray: Array) { val listState = rememberLazyListState() val coroutineScope = rememberCoroutineScope() val...

EditText not showing the hint or the outline box until focused I saw that there are numerous threads raised on this topic but none of them seems to solve my issue. I have an EditText inside of InputLayout and it shows blank until focused. Android version 12

Retrofit2 get response JSONobject I'm have little bit problem in my project i want get a JSON from this API: https://earthquake.usgs.gov/fdsnws/event/1/query?format=geojson&limit=10. API import com.earthquakereport.data.model.EarthquakeReportData import retrofit2.Response import retrofit2.http.GET interface ApiService { @GET("fdsnws/event/1/query?format=geojson&limit=10") suspend fun getEarthQuakeReport():...

KOTLIN problem with passing url (from firebase) to menu option in ViewHolder adapter I have a problem with pass the url from fileList of urls downloaded from firebase to menu option. I need to pass specific url depending on which one was clicked to menu. Here is my code of adapter where is the problem class AdapterKarty(private val fileList: List, private val context: Context): RecyclerView.Adapter(){ override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AdapterKarty.ViewHolder { val a =...

Is it possible to use selenium on an arm64 device which has a linux server? I'm trying to run selenium on an arm64 device with linux server, since I cannot install chrome on this device, I want to use chromium or firefox browser in headless mode. But I'm getting different errors every time I run my selenium program. here is the error log while using chromium: /root/.cache/selenium/chromedriver/linux-arm64/101.0.4951.41/chromedriver: 1: Syntax error: "(" unexpected Exception in thread "main" org.openqa.selenium.SessionNotCreatedException: Could not start a new...

Android KTOR 2.0.0 client - default query parameter I recently migrate from ktor 1.5.6 to 2.0.0 We used to have something like this when creating http instance: HttpClient(Android) { defaultRequest { if (internal) { header(WebserviceConstants.KEY_APIKEY, BuildConfigCore.KPTN_API_KEY) header(WebserviceConstants.KEY_TOKEN, getAccessToken()) parameter(WebserviceConstants.KEY_LANG, localeHelper.getLanguage()) } host = hostAddress url { protocol = URLProtocol.HTTPS...

How can I create animated transitions with Bottom Navigation? As far as I know there is no simple way to make animated transitions when use Navigation Component + BottomNavigationBar. The way described in official guide does not support animated transitions. So I came across some similar questions...

I am not able to use either the onclick function, nor setOnClickListener in my android studio app, all it's showing is the error while I was making my first program, to generate a toast message, I was not able to use either ONCLICK , not the setOnClickListener. please help with the issue.

Command 'c:\Program Files (x86)\InstallAnywhere/build.exe' finished with non-zero exit value 1 tasks.register("buildInstaller"){ dependsOn(..some paths) doLast{ val installanywherebuilderexe = "c:\Program Files (x86)\InstallAnywhere/build.exe" if(file(installanywherebuilderexe).exists){ exec{ commandLine(installanywherebuilderexe, file(some_xmlfilepath).absolutepath, "-p",file(some_buildproperties_filepath).absolutepath,"+merge") } } } Same code runs on local installanywhere 2018 but fails on jenkins installanywhere 2018, is there any way to get why exit...

How to call the system default browser selection menu without a link It is necessary to call the system default browser selection menu without a link (as in the image) Yandex.browser and Chrome have the same menu, therefore, this is a single system menu

RecyclerView deletes old views when scrolling I created a RecyclerView with data from TMDB Api. I've added an OnScrollListener and and inside it I make a new call to Retrofit to get the next page. The Recycler shows the new page but the deletes the values from the old page. For example: I'm on page 2, then I scroll down and the Recycler updated the UI with page 3, after that when I try to scroll up, the recycler doesn't load page 2 ApiService.kt private val moshi = Moshi.Builder() .add(KotlinJsonAdapterFactory()) .build()...

Kotlin Flow out generic I am using flow{} builder to call the api and then emit() the response to ViewModel. I add return type of flow as Flow. However, at some places in emit(), the Android Studio throws error : Not enough information to infer type variable T Because the emit(Resource.Error(message = "Couldn't reach server, check your internet connection.")) is expecting values of type List Please see my Resource class below sealed class Resource(val data: T? = null, val message: String? = null) { class...

How to undo a recyclerview item swipe with undo toast How do I implement an undo action Snackbar in kotlin, after a user has swipe away a recyclerview item. I want something like this This is my code to swipe/delete a recyclerview item override fun onViewSwiped(position: Int) { deleteTask(list[position].ID) list.removeAt(position) notifyItemRemoved(position) updateNotesPositionInDb() }

Android : Firebase Notification - small icon not changed, its showing app icon by default Firebase notification app icon shown as notification icon. In manifest .... in coding var notificationBuilder = NotificationCompat.Builder(this, channelId) .setSmallIcon(R.drawable.ic_stat_name) .setContentTitle(title) .setContentText(messageBody) .setPriority(NotificationCompat.PRIORITY_DEFAULT) Instead of showing R.drawable.ic_stat_name am getting my app logo in the notification.

How to tell the difference between Java and Kotlin code? As a beginner to Android app development, I am finding code examples that do not identify whether they are written in Java or Kotlin. Even StackOverflow questions frequently omit the language tag. Is there an easy "tell" in the code where you can immediately see which language is used? For example, I can distinguish C and C++ very quickly from certain elements of the syntax, header use, and library functions. Are there any quick and "obvious" ways to distinguish Java from Kotlin? I want to be...

Finish an activity when onBackPressed So, I want to make a simple app with a flow like this: MainActivity with a list of picture posted by different users -> user click FAB to post picture, move to AddPicture activity with intent -> AddPicture Activity, filled the required form, and then startActivity with intent to get back to Main -> MainActivity with a fresh new list and new story listed up top -> onBackPressed clicked, return to Home Screen of the smartphone But, my app didn't work like I intended. This is how my App work:...

Android Kotlin - glide error assertNotDestroyed I see in google play console that some of the users are getting this error: java.lang.IllegalArgumentException: at com.bumptech.glide.manager.RequestManagerRetriever.assertNotDestroyed (RequestManagerRetriever.java:348) at com.bumptech.glide.manager.RequestManagerRetriever.get (RequestManagerRetriever.java:148) at com.bumptech.glide.Glide.with (Glide.java:826) at de.xxx.xxx.MainActivity.setHeader (MainActivity.kt:616) at de.xxx.xxx.MainActivity.requestAppConfig$lambda-8...

StorageException has occurred. User is not authenticated The error is risen when I try to upload to the storage. I've already implemented authentication in my app, and am having no problem with creating a user and authenticating. StorageException has occurred. User is not authenticated, please authenticate using Firebase Authentication and try again. Error -13020 HttpResult: 401 2022-04-28 172645.646 30490-30886/com.thunder.apps.myshoppal E/StorageException: The server has terminated the upload session java.io.IOException: The server has...

Is passing LiveData to ViewModel constructor valid? I'm building an app using MVVM with Room where a list of data is displayed in an activity. The list is obtained from the Room database in a LiveData object and observed in the activity. Upon wanting to add another item to the list, a DialogFragment is shown which prompts the user to pick a value from a list of possible values, however, if the chosen value is already present in the database, it will not allow the user to press the dialog positive button. I have implemented separate ViewModels...

Compose TextField with number keypad by default, but allowing alphabetic characters I want to show a numeric keyboard by default but let the user change it to text. var text by rememberSaveable { mutableStateOf("") } TextField( value = text, onValueChange = { text = it }, keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number) ) I read a lot of old questions and answers but none of them were helpful, including: <a...

WearableRecyclerView doesn't centre the list items I've been trying for several days to make a list with the same effect that some Wear OS apps do, such as Google Play Store, where the list is shrinking the items that are disappearing and expanding the new items that are appearing: I followed the Google Developers documentation, the problem is that when I apply the custom Layout Manager to it, the items don't stay centered for me, they look like this: <a...

What is the simplest way to align center on first component of two ordered component in jetpack compose? I want to align the red surface to the center of the page, how can i do that? @Composable fun Screen() { Row( modifier = Modifier.fillMaxSize(), horizontalArrangement = Arrangement.Center, verticalAlignment = Alignment.CenterVertically ) { Surface( color = Color.Red, modifier = Modifier.size(100.dp, 50.dp) ){} Surface( color = Color.Blue, modifier = Modifier.size(100.dp, 50.dp) )...

Test case is failing after upgrading the spring boot version from 2.1.x to 2.6.x Test case is failing with following Exception : after upgrading the Springboot version from 2.1.x to 2.6.x org.awaitility.core.ConditionTimeoutException: Condition with lambda expression in com.timer.Relax that uses kotlin.jvm.functions.Function0 was not fulfilled within 20 seconds. at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:165) at org.awaitility.core.CallableCondition.await(CallableCondition.java:78) at...