Restart Activity onPostExecute Assalamualaikum Im new on android with kotlin or java. i develop an aplication to read a QR Barcode then i parse JSON from the result of barcode (Using AsynTask). if the result is true then move to another activity (i achieve this) but if the result false i want restart activity from onPostExecute what should i do in my app to restart activity from onPostExecute ? Thank You in Advance and here my code override fun onPostExecute(result: String?) { super.onPostExecute(result) // parse...

Hide Bottom Navigation View in fragment I want to hide bottomNavigationView in some fragments. I have tried the below code, but it has flicker effect.(bottomNavigationView hide before the nextFragment becomes visible. val navController = this.findNavController(R.id.nav_host_home) navController.addOnDestinationChangedListener { _, destination, _ -> when (destination.id) { R.id.searchArticlesFragment -> bnvMain.visibility = View.GONE R.id.articleFragment -> bnvMain.visibility = View.GONE else...

Kotlin @ManyToMany mappedby seems not working I have two entity with a relationship of many to many as follow. But the mappedby in ManyToMany seems not working. interface CourseRepository : CrudRepository @Entity class Course( @Id var id: Long? = null, var name: String = "", @ManyToMany(mappedBy = "likedCourses") var likes: Set = hashSetOf() ) Class "Course" may be liked by many students. interface StudentRepository : CrudRepository @Entity class Student( @Id var id: Long? =...

Kotlin ktor jetty modify response headers This is what I've tried so far. embeddedServer(Jetty, 9000) { install(ContentNegotiation) { gson {} } routing { post("/account/login") { // 1. Create URL val url = URL("http://some.server.com/account/login") // 2. Create HTTP URL Connection var connection: HttpURLConnection = url.openConnection() as HttpURLConnection // 3. Add Request Headers connection.addRequestProperty("Host",...

how to pass drawable image to MediaMetadata in chromecast I'm integrating chromecast into my application. when i'm building media info private fun buildMediaInfo(video_url: String?): MediaInfo? { try { val movieMetadata = MediaMetadata(MediaMetadata.MEDIA_TYPE_MOVIE) movieMetadata.putString(MediaMetadata.KEY_SUBTITLE, sub_title) movieMetadata.putString(MediaMetadata.KEY_TITLE, title) if (image_url != null) { movieMetadata.addImage(WebImage(Uri.parse(getSignedUrl(image_url))));...

How to use retrofit without any pojo or data class or model class I am working on an application where I want to use retrofit, but response from API is very large and can not be converted in any data class or POJO class, and also the response is dynamic it increase with user actions for backup, So I want to ask this a long time that is there any way where I can use retrofit without making response data class or POJO class otherwise I have to move back to basic Http way of using REST api's . If anyone have achieved this or used before , please give some idea...

Android FastAdapter ClickEventHook isn't working properly I am seeking forgiveness for this simple problem. I am using FastAdapter for the first time and I am fairly new to Kotlin. Ok, now let me share the problem. I have a layout for the recyclerview item holder, an adapter which extends AbstractItem class. Actually I couldn't format the code correctly here on StackOverflow. So I created the code at GitHub Gist. Here is the <a...

How to fix in android studio(The resource @drawable/abc_vector_test is marked as private in androix.appcompat:appcompat) I have added this resource to my project and it shows me a warning. How can I solve it?

Get data from room db using async &amp; await I am trying to get data from Room Database using async & await but getting problem while returning value. Here is my code: fun getUserFromDB() { val profileDao = AppDatabase.getDatabase(context).getProfileDao() CoroutineScope(Dispatchers.IO).launch { val userProfile = profileDao.getUserProfile().await() } return userProfile } Here I want to return userProfile from the method but I cannot do that inside scope and it will be null if I return from outside of Coroutine...

How to mock java.net.HttpClient from Java 11? I have a function that perform a GET request to external system. I was wondering how is possible to mock it: private fun getUserProfile(): UserProfile { val httpClient = HttpClient.newBuilder() .version(HttpClient.Version.HTTP_1_1) .connectTimeout(Duration.ofSeconds(10)) .build(); val request = HttpRequest.newBuilder() .GET() .uri(URI.create("...")) .build() val...

object with ItemTouchHelper.SimpleCallback So I was reading the documentation of ItemTouchHelper and tried to make one. val itemTouchHelper = ItemTouchHelper(ItemTouchHelper.SimpleCallback(ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT){ //Should let me override functions }) But in the simpleCallBack tells me that it cannot create an instance of the abstract class which makes absolute sense. Then I didn't know how to solve this. So I've decided to go to a project that I've made following a tutorial to understand it and this is...

kotlin serialization of data class throws Unexpected JSON token error I would like to map below JSON to my generic data class. @Serializable data class test(val format: Map) fun main() { val json = Json(JsonConfiguration.Stable.copy(ignoreUnknownKeys = true, isLenient = true)) val response = """{"format": { "a":"some text", "b":[1,2,3] }}""" println(json.parse(test.serializer(), response)) } the above code throws below error Exception in thread "main" kotlinx.serialization.json.JsonDecodingException: Unexpected JSON token at...

Kotlin room join three table I have an object from three tables I try do this : @Parcelize @Entity(tableName = "table_one") data class OneItem( @PrimaryKey @ColumnInfo(name = "id") val id: Long, val name: String? = null, ):Parcelable @Parcelize @Entity(tableName = "table_two") data class TableTwo( @PrimaryKey @ColumnInfo(name = "label") val label: Long, val value: String? = null ):Parcelable @Parcelize @Entity(tableName = "table_three", primaryKeys = ["id_table_one", "type"]) data...

Update online user-data from outside the session (without reauthentication) There are several scenarios, where I want to update the user/principal data such that the changes are reflected while the user stays logged in (I do not want to force re-authentication) From "within" the session this is not a Problem: @PostMapping("/updateInfo") fun updateMyData( @AuthenticationPrincipal user: AppUser, @Valid @RequestBody newInfo: UpdateDataRequest ): ResponseEntity { val testInfo = TestUserInfo(user, newInfo) user.info =...

Randomly deleted data in recyclerview in sqlitedatabase makes app crash When I am deleting from down to up it's working fine and it gets crashed when my order changes. I have written the delete function in sqlite class. I have tried everything, but it gets crashed when I am randomly delete it.why this question is getting close the question is clear enough to know what is the problem class Adapter(var context:Context, data: ArrayList):RecyclerView.Adapter() { lateinit var db:SQHelper var data:ArrayList init{ this.data=data }...

How to migrate room database? I am newcomer. How to migrate room database. I tried to migrate using this instruction https://developer.android.com/training/data-storage/room/migrating-db-versions , but don't understand where should I use it. I changed version from 1 to 2 and add column @ColumnInfo(name = "age") val age: Int Could you help me to migrate it? @Entity data class User(...

Kotlin room one to many I have an object from three tables. I try to do this: @Parcelize @Entity(tableName = "table_one") data class OneItem( @PrimaryKey @ColumnInfo(name = "id") val id: Long, val name: String? = null, ):Parcelable @Parcelize @Entity(tableName = "table_three", primaryKeys = ["id_table_one", "type"]) data class Three( @ColumnInfo(name = "id_table_one") val id_table_one: Long, @ColumnInfo(name = "type") val type: Int, @ColumnInfo(name = "card_id") var cardId: String? =...

Type mismatch on kotlin Type mismatch : inferred type is View! but Int was expected that's what the compiler said, i made a viewlist on kotlin and the User object show errors on : val user = User( dataPhoto.getResourceId(position, -1), dataName[position], dataRepository[position], dataUsername[position], dataLocation[position], dataCompany[position], dataFollowers[position],...

How to paste clipboard data to text editor in android automatically? I have a background service app which is getting data from clipboard of android. I want to paste that data to another app's focused Edittext automatically or to notes app of android OS.

Jsoup parshing doesn`t work with asyncTask val task = MyAsyncTask(this) task.execute(URL("https://www.data.go.kr/data/15012894/standard.do")) I trying to parshing that site, but my app doesn`t look anything. what should I do? connecting adapter is OK(I think). Log error or forced termination not occur. problem is just look "Empty" at screen. class MyAsyncTask(context: ShowData): AsyncTask() { val activityreference = WeakReference(context) override fun doInBackground(vararg params: URL?): Unit { val activity =...

add to end icons to TextInputLayout in android I wanna create TextinputLayout with two end icons , but it doesn't work , the clear end icon show above the search icon ,here is my code :

How to start real-time bluetooth stream and pause it by clicking button? I want to start data receiving from arduino via bluetooth for every 100 milliseconds by clicking a button(stream_start) and pause it by clicking another button(stream_pause). I tried with thread method, but starting doesn't work(app crashes after I click the button) and pausing works. I think thread implementing was problem because others worked fine until I use thread method. Why my app is crashing and how can I solve this? Here's my code: package com.domain.bluetoothreceiver import...

Check/uncheck all switches Android kotlin I have a problem with a listview and switches that I have to add another switch that checks or unchecks the others. My class: data class Student( @PrimaryKey val idStudent: String, val name: String ) Then I have a listview that's binding the data that I have:

Does Google Places Autocomplete cost money? I'm trying to understand if Google would charge me for using the findAutocompletePredictions() function from their Places API. This is the function I'm using in my app: fun queryPlaces(searchText: String?) { val request = FindAutocompletePredictionsRequest.builder() .setSessionToken(token) .setQuery(searchText) .build() placesClient.findAutocompletePredictions(request).addOnSuccessListener { response -> searchResults =...

Open another activity and it's layout from a list view I have created an app in MainActivity.kt and layout in MainActivity.xml. My code is an electronic configuration calculator. Now I want add more functions to my app. So I have created a seperate layout as mainmenu.xml and have created a list view in it. What I want now is that if some click a button in list view, it opens my original activity(Main activity.xml and .kt) And I also want to set this list view as primary page.

Android Volley - Upload FILE with KOTLIN I created this class: import com.android.volley.AuthFailureError; import com.android.volley.NetworkResponse; import com.android.volley.ParseError; import com.android.volley.Request; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.HttpHeaderParser; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.UnsupportedEncodingException; import...

How to pass Adaptor Position to another Activity ViewHolder init{} I have a room database with a set of, lets say, people and some details about their pets. I've got a list of the people in a RecyclerView. What I want to do is have it so when users click on a person, they go to another Activity which has details about that person and RecyclerView with a list of their pets. This list of people and matching pets is created in a DAO using an INNER JOIN query linked to the PersonId. My problem is I can't find a way to put the personId (which I can get from the...

Kotlin - Initializing SharedPreferences I'm attempting to load and save data using sharedpreferences in Kotlin, specifically using the Android Studio. I'm getting this error message: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference Pointing at my initialization of shared preferences. class MainActivity : AppCompatActivity(), SensorEventListener { private val dragonstats by lazy...

Apollo Federation cannot get connection running in docker-compose: Couldn't load service definitions for...reason: connect ECONNREFUSED 127.0.0.1:80 I am trying to run two applications by docker-compose without success, the federation cannot connect on service. Both works well out of docker. Below follow the projects: Apollo Server Federation in NodeJS GraphQL API In Kotlin + Spring Boot + expediagroup:graphql-kotlin-spring-server docker-compose.yml version: '3' services: myservice: image: 'myservice:0.0.1-SNAPSHOT' container_name: myservice_container ports: - 8080:8080 expose: - 8080 apollo_federation:...

How do you create a Guava CacheBuilder in Kotlin? What is the correct way to construct a Guava CacheBuilder in Kotlin? I'm making a simple client side cache with CacheLoader and Guava based on an example. The example: LoadingCache graphs = CacheBuilder.newBuilder() .maximumSize(1000) .build( new CacheLoader() { public Graph load(Key key) { return createExpensiveGraph(key); } }); The following translation of CacheLoader doesn't compile due to a package private constructor error:...