Convert String to Location in Kotlin I'm working on an Android app in Kotlin in which I want to save a 'Location' object to SQLite and then recover it later. I can convert a 'Location' object to a 'String' by simply calling 'toString()' on the 'Location' object like this: var loc:Location var str:String ... Code to init loc ... str = loc.toString After which the String has a value such as: str = Location[gps 37.328528,-121.897877 hAcc=8 et=+1d15h4m55s443ms alt=-6.62762451171875 vel=0.36 bear=264.9 vAcc=17 sAcc=3 bAcc=97...

Android App not displaying images from cloud firestore in release build but works in debug build I recently finished building a wallpaper app but i have been stuck with for weeks with this problem The app works fine in debug build but not in release i have added anonymous authentication to the app and added the following rules in cloud firestore service cloud.firestore { match /databases/{database}/documents { match /{document=**} { allow read, write: if request.auth != null; } } } Moreover i have added the release sha1 and sha256 keys to firebase and updated...

Turn activity Screen with user data in to pdf in kotlin /java I am working on a application where user enters the data and submit the data, that submitted data goes to another activity for user confirmation , if user press pdf button entire data should convert into pdf and saves . my question is how to make that entire activity screen into pdf . I tried but only the android view is converting into pdf but user data is not getting .

Flutter: How to group messages with similiar time range and only display time once? Currently I am building a chat App and my goal is to display the "time/date" over the messages. However, since this gets very messy I only want to show the date once over every hour (similiary to Facebook Messenger). Since I am using Firebase, I store every chat with a collection 'messages' that contain a document for every message in that chat. The document contains String:'messageType',...

How to capture Image from camera using Activityresult contracts In the manifest file I have added these permissions ActivityResultLauncher camera= registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback() { @Override public void onActivityResult(ActivityResult result) { if(result.getResultCode()==Activity.RESULT_OK){ if(result.getData().getExtras().get("data")!=null){ uriArrayList.add((Uri)...

Android App is not connecting to Firebase database in realtime I have re-made the code for this about 15 times and I cannot see what I'm missing. All I want is to enter text from 2 edittext boxes and then click a save button to update to the database. Please see below for more information and thank you very much for any help. The database is very simple, it is called just "users", if there's any other information I can provide please let me know. Thank you. activity_main.xml MainActivity.kt package com.example.firedemo import...

Is there a equivalent of C#'s DebuggerStepThrough in Kotlin? I have made an event system in Kotlin where events can be listened to and broadcast, similarly to how events work in C#. To broadcast an event, I have this line: playerConnected.broadcast(player) Here playerConnected is the event and player is the context object. When debugging in IntellIJ, when "stepping into" the broadcast function to see what actions that event listeners do, it instead steps into the broadcast() function, which makes sense, and it looks something like this: fun...

Good way to pass value into a function without passing it directly as parameter I have kotlin class which is Spring managed (it is a @Service). It calls a function on an object which isn't Spring managed. How to to pass a value to that function? I don't want to just pass argument to it as this function is polymorphic and I only want one verson of this function to use this value, other versions of this function don't need this value. I get this value from properties file by using @Value annotation. Code examples: @Service class ServiceClass( private val...

Flutter showing blank cross icons I got a native android app (maintained by a team). I have added the flutter app to this existing android app. This flutter app is basically a flutter module rather than a flutter project. All I need is to open the flutter module with this existing android native app. But along with this, I also wanted to Making use of a few already built and tested android libraries(SDK) Not forcing the native team to install flutter SDK. For these reasons what I did was I made a native bridge that implements...

Could not find builder-7.0.0-alpha09.jar I have a problem with the newest android studio version. android studio arctic fox 2020.3.1 canary 9 The problem I have is this. A problem occurred configuring root project 'My Application'.

Could not resolve all artifacts for configuration ':classpath'.

> Could not find builder-7.0.0-alpha09.jar (com.android.tools.buildbuilder7.0.0-alpha09). Searched in the following locations:...

Lateinit property viewModel has not been initialized I initialized viewModel with this line viewModel = (activity as NewsActivity).viewModel in BreakingNewsFragment but, recived below error. How i can fix this problem?! thanks for your help BreakingNewsFragment import android.os.Bundle import androidx.fragment.app.Fragment import android.view.View import com.example.simplenewsapp.R import com.example.simplenewsapp.main.MainViewModel import com.example.simplenewsapp.NewsActivity import com.example.simplenewsapp.adapter.NewsRecyclerViewAdapter...

Save data of pages in ViewPager I have a ViewPager in my android application, and it just inflates other layout pages in them - NOT FRAGMENTS. I can restore the same page I was on from a Paused state of the activity. But the data I have in those pages, get set back to the default ones. The data is set from the ViewHolders. For example, I have a seekBar on the 3rd page of the ViewPager with a default progress of 3, and I slide the seekBar to set the progress to 7. When I go in the paused state of the activity lifecycle and...

Why does Gson().toJson(Location("")) in Android/Kotlin return `{"mElapsedRealtimeNanos":0}` I'm writing an Android app in kotlin and when I run this code: var str:String = Gson().toJson(Location("")) str is set to {"mElapsedRealtimeNanos":0} Why is this?

Building form with dynamic rows in Android/iOS How can I make Android widget (Kotlin/Java) as well as for iOS using swift, equivalent to my below html5 widget? In my html I've a form in the form of table where only first row appear, then the user can add whatever rows he want, (and can delete any row he want, unless it is the only row in the form) as show: The code I'm using is: function deleteRow(row) { var i = row.parentNode.parentNode.rowIndex - 1; //...

Spring Maven setting up Dokka Im working on a Spring Maven application written in Kotlin and documented with Kdoc. I want to export this documentation to an HTML file using Dokka. Therefore I used the code provided in https://github.com/Kotlin/dokka. But it seems like it doesn't work at all. I don't get any errors or warnings. Hopefully, someone can help me and knows how to get it running. Code from pom.xml (shortened) ... 11 1.4.30...

Android Mobile App feature that compare two location I am newly and currently learning about kotlin and android programming I want to make an app that compares and detect which one between two things that closer to me, and the compared thing is, for example, two different McDonald franchise based on a google map location, I have no idea how am I supposed to build this, can u guys help me to identify what kind of technology that is suitable for my school project? thank you :)

converting a string representation of bytestring to a bytearray I have this string: val s = "00b44a0bc6303782b729a7f9b44a3611b247ddf1e544f8b1420e2aae976003219175461d2bd7" + "6e64ba657d7c9dff6ed7b17980778ec0cbf75fc16e52463e2d784f5f20c1691f17cdc597d7a514108" + "0809a38c635b2a62082e310aa963ca15953894221ad54c6b30aea10f4dd88a66c55ab9c413eae49c0b" + "28e6a3981e0021a7dcb0759af34b095ce3efce78938f2a2bed70939ba47591b88f908db1eadf237a7a" + "7100ac87130b6119d7ae41b35fd27ff6021ac928273c20f0b3a01df1e6a070b8e2e93b5220ad0210400" +...

Room DB: How to init Entity with list parameter without using TypeConverter I have a class: @Entity
 public class Dot { @PrimaryKey
 @ColumnInfo(name = "dotId")
 @NonNull
 private String id; private String name; ... private List products; ... } class Product is also an @Entity When my app is compiling I get an error: "Can't figure out how to save List in database", because Room don't know how to work with Lists. So my question, is it possible to automatically follow this steps: create product_table from Product class insert rows from...

RoomDB cannot convert type Map<String, List<Int>> even with Type converter. Android/Kotlin I tried saving a Map to my database, added a type converter to it but its still not working. This is the error I am getting error: Query method parameters should either be a type that can be converted into a database column or a List / Array that contains such type. You can consider adding a Type Adapter for this. java.util.Map colorLabels, @org.jetbrains.annotations.NotNull() This is my entity @Entity(tableName = "images") @TypeConverters(ImageTypeConverters::class) data class...

How can I implement custom places autocomplete? I need to implement a places autocomplete that looks like the following: I am trying to use the AutocompleteSupportFragment but I need the widget to be displayed under the fragment not at the top of the screen but I dont find the correct way to do it. This is the current design

Why is property change not realized in different thread despite adding Kotlin @Volatile Annotation I am trying to avoid an endless loop in the interaction of an EditText, its TextWatcher and the update from observing the corresponding LiveData in a ViewModel. The TextWatcher should inform the ViewModel about user changes in the EditText. And the EditText should reflect the text from the ViewModel, if it was changed by other means than user input. This leads to an endless loop, where the TextWatcher writes the text into the ViewModel, which triggers the observer function, which again...

ReactiveCrud, how can I delay for a moment without blocking IO before deleting data So suppose I have created an api for booking hotel room by making a ticket and then I will use the information from the ticket (ex. size, bed etc.) to find available room, but if it could not find any available room I will need to delete this ticket later. So for a better user experience I don't want to suddenly delete the ticket, but I want to change the ticket status to be reject or something else and then delete it after 30second. So here what I have tried. val ticket = ticketRepostiory...

Encode / decode JSON "string" in kotlinx.serialization Is it possible to encode / decode any valid json objects in string format in a custom serializer. For example the code below but not let it serialize as json string but as any valid JSON with unknown structure? object JsonObjectSerializer : KSerializer { override val descriptor = PrimitiveSerialDescriptor("JsonObject", PrimitiveKind.STRING) override fun deserialize(decoder: Decoder): JsonObject = JsonObject(decoder.decodeString()) override fun serialize(encoder:...

Motion Design FAB to Fragment I'm trying to animate my FAB to open up into a fragment using MaterialContainerTransform. I've tried doing it with sharedElementEnterTransition but it only worked halfway(when leaving the fragment into the fragment the fab is in) Here's a gif of how I want it to look like: source: <a href="https://proandroiddev.com/material-design-motion-for-android-396da62edb1c" rel="nofollow...

How can I convert a ByteArray into an String and reverse in Kotlin? I'm trying to convert a String to a ByteArray, and convert the ByteArray to a String in Kotlin. My program was crashing, so I decided to debug a little, and my surprise was that when I convert a String into a ByteArray and I convert the same ByteArray to a String, the value isn't the same. Like, if I do this: val ivEnc = "[B@9a7d34b" val dataEnc = "[B@1125ac5" passTextEncrypted.setText(ivEnc.toByteArray().toString()) passTextDecrypted.setText(dataEnc.toByteArray().toString()) I expect to...

Camera2 API Missing devices? private fun cameraLog() { manager = getSystemService(CAMERA_SERVICE) as CameraManager for (id in manager.cameraIdList) { val cc = manager.getCameraCharacteristics(id) Log.d("LOG22", cc.toString() ) } I've tried this code with both the emulator and my oneplus8pro and it seems like the CameraManager finds in each case only 2 devices, one front camera and one back camera. Although my oneplus has at least 4 cameras on the back. Where are the others?

cannot find implementation for com.udacity.capstoneproject.database.CountryDatabase. CountryDatabase_Impl does not exist I am creating a covid-19 updates app using an open-source API. I am using room database to create a database to hold all my data regarding cases internationally, etc. When I try to run my app I get the following error It is saying the impl/implementation file for my CountryDatabase defined in the following code doesn't exist - @Database(entities = [DatabaseCountry::class], version = 1, exportSchema =...

Abstract fun invoke() not implemented I've created a View and I encountered a problem with my interface for Buttons ClickListener. Interface looks like this interface CustomButtonsClickListener : () -> Unit { fun onPlusClick(view: View, button: ImageButton) fun onMinusClick(view: View, button: ImageButton) } It is implemented by the method: fun setCustomButtonsClickListeners(clickListener: CustomButtonsClickListener) { binding.addButton.setOnClickListener { clickListener.onPlusClick(this,...

Using the @CompositeProperty annotation for a Map&lt;String, Set &lt;String&gt;&gt; in a Spring Boot application using Kotlin and Neo4j I have a question about using @CompositeProperty for a Map> in a Spring Boot application with Kotlin and Neo4j. plugins { id("org.springframework.boot") version "2.5.0-SNAPSHOT" id("io.spring.dependency-management") version "1.0.11.RELEASE" kotlin("jvm") version "1.4.30" kotlin("plugin.spring") version "1.4.30" } dependencies { implementation("org.springframework.boot:spring-boot-starter-data-neo4j")...

Is it okay to create clicklisteners (or other listeners) inside a viewmodelscope? I have a a fragment containing a googleMap where I am creating a bunch of Markers (which also is clickable). They are spiced with different information (colors, shapes and so on) from a room livedata query. In addition I have some MaterialButton buttons (which are styled as pushbuttons) where I toggle the Marker visible status on. At the moment, the "setup" of theese markers takes some time (200ms-2 secs, depends of amount of markers). To get out of that waiting, I was planning to use a...