How to apply live data? I am trying to learn the concept of live data and view model architecture by applying it in a simple app where I add five and minus 1 to number, View Mode Architecture worked fine but now I am trying to apply live data concept but due to lack example I am not able to apply it fragViewModel class fragViewModel:ViewModel() { val num=MutableLiveData() // Initializing num=0 init { num .value= 0 } // Functions to add five or subtract one fun addFive() {...

get current location inside a fragment I need to get the current location of the user and store its values in separate longitude and latitude variables. Right now in the following code I have set them statically. Here is my Location Fragment:(All my fragments are displayed inside an Activity using viewpager) package com.example.atry.MakeComplaint import Retrofit.INodeJS import Retrofit.Observables import Retrofit.RetrofitClient import android.app.Activity import android.content.ContentValues.TAG import android.content.Context...

Junit expected value exception I am writing a test to test my repository. I noticed that the return expected value matches the actual value except that the actual value is wrapped within "". I do not know why this is happening. @ExperimentalCoroutinesApi @RunWith(AndroidJUnit4::class) @Config(sdk = [Build.VERSION_CODES.O_MR1]) class MovieRepositoryTest{ @get:Rule var instantExecutorRule = InstantTaskExecutorRule() private val movie1 = MovieEntity("Title1", "", 3, "Movie1Overview", "Jan...

Android Studio get error of "Unresolved Reference" whenever I try to link the Kotlin File to .xml file I have a activity_second.xml file created in the layout folder (as shown in the photo above). But, whenever I try to link my kotlin file(SecondActivity.kt) to this .xml(activity_second.xml) file, I get the error of "Unresolved reference: activity_second". Here's are my SecondActivity.kt code override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

How to interract with FirebaseMessagingService instance I have extended FirebaseMessagingService to handle data payloads from backend class MyFirebaseMessagingService: FirebaseMessagingService() { override fun onMessageReceived(remoteMessage: RemoteMessage) { remoteMessage.data.let { if (it.isNotEmpty()) { sendNotification() } } } override fun onNewToken(token: String) { ... } fun sendNotification() { ... } } Now I might also need to initiate a...

How to save the state of MutableList during screen rotation So I have a var routepoints: MutableList = ArrayList() and I want to save in override fun onSaveInstanceState(outState: Bundle) { super.onSaveInstanceState(outState) outState.putParcelableArrayList("routepoints",routepoints) } But I get a message Type mismatch. Required: ArrayList! Found: MutableList How to put my list to outState?

Camel 3: How to intercept an error route that is sent to by onException During the migration from Camel 2 to 3, my error routing tests broke. I force an exception and ensure that errorHandlingRoute receives the exchange. myRoute -> onException -> errorHandlingRoute The pattern that worked successfully in Camel 2 was as follows: // ROUTE val errorUri = "direct:all_errors" onException(Exception::class.java) .to(errorUri) from(errorUri) .routeId(errorUri) .process(...) val uri = "direct:start" from(uri) .routeId(uri) // use the same value for both...

Android MVVM - How to pass data to viewmodel with big form in view? I have a view which contains some widgets and after the user clicks "save" this information is sent to the SomeViewModel. The problem is that when I collect the information from the view this result in a 10+ arguments method in the SomeViewModel. On the other hand I can create the SomeDataClass inside the view and pass it to the SomeViewModel which I think its not good because the view shouldn't know about it. Is there any other alternatives? class SomeViewModel : ViewModel() { fun...

How to inject interface with Dagger2 which takes long time to resolve it's implementation? I would like to resolve dependency asynchronously. The problem is something like this: I have devices with bluetooth. All the devices can have multiple firmware version and i have to support all of them. So my plan is to first connect to the device get its firmware version then disconnect. With the version number i can choose which implementation i need. I found this <a href="https://medium.com/@froger_mcs/async-injection-in-dagger-2-with-rxjava-e7df503343c0" rel="nofollow...

I get a No view for id for fragment I am trying to have an activity inside of my fragment, the fragment shows posts of people you follow and the activity shows the most recent post from anyone. My fragment.. public class HomeFragment extends Fragment { private PostAdapter postAdapter; private List postLists; private List followingList; private ProgressBar progressBar; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View...

How to stub this method with mockito I am using Mockito on kotlin class The method looks like this: class A { open fun doSomething(text: String, text1: String, callback:(Boolean)-> Unit) { ... } } I tried stubbing it the following way: mock<A>() { on { doSomething(any(),any(), any())}.then { it.arguemnts.last().invoke(true) } } But it fails on NPE: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Boolean.booleanValue()' on a null object reference...

Is there a way to create one JPA entity based on many database tables and do I really have to do this or is it a bad practice? I'm quite new to Spring Data JPA technology and currently facing with one task I can't deal with. Hope someone can easily help with that and give an advice on best practice in such cases. In my postgres database I have a two tables connected with one-to-many relation. Table 'account' has a field 'type_id' which is foreign key references to field 'id' of table 'account_type' (). So the 'account_type' table...

ARCORE android studio object 3D not Displaying I have problem than the object 3d not displaying And in my log not logging never error I tried to write the code in several ways but it doesn't work. I don't know if anything is missing in my code. I have been tired for a while now that I have been trying to solve this problem someone can help me is urgent this is my code lateinit var aRFragment: customARfragment private var shouldAddPlane = true private var shouldAddXwing = true private lateinit var selectObjectUri: Uri override fun...

Android media player preferences and delayed time On Android Studio, either Kotlin or Java, I need to write a code to: 1-select a time gap (6 buttons of 6 different time gaps) - save this choice 2-select a song (using 6 buttons) - save this choice 3-after choosing and saving the preferences, app goes to stand-by. 4-wakes up on “chosen time” to play the chosen song in loop until stopped by user. After that he goes stand-by again to play again in x minutes. The app keeps the choices as configuration until new configuration is made....

Kotlin Array with generic name equivalent of swift Hi i'am new to Kotlin and i would like to do an array with generic names. In Swift i can do : let analytics = ["organization_login": "toto", "organization_name": "titi", "lead_email": "tata"] The type is : [String: String] I Looked all Array and Arraylist in kotlin but i couln't find the equivalent. I specialy want to be able to have not fixed name for the lablel of the parameter because it's depend on where i am i the app. What i want it's to be able to give parameter name for my array.

MongoDB how to use $all with regex for kotlin So i am trying to use $all of mongodb to match string within an array. I got an array of string like, X:["Hello World","My Name is Something","Do you like it"] So what i am trying to do is check if the array contain the word in it. I am able to make it work if its exact match for eg, "Hello World" will return True.. But what i want is that if i search "Hello" it still return true.. I tried to integrate regex with $all but it didn't work. My code for the search: .find(all("X", listOf("Hello...

Detect incoming call in android using kotlin not working could not find any reference on using kotlin to detect incoming call using BroadcastReceiver created dynamically. most java program add intent in the manifest. I wanted to use Broadcastreciever in the specific activity. I used below code but not working. Can anyone help? Problem: 1. How to set up the Intent Filter for the Phone_State class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

Try to write `coroutine` analog for `handler`, but not work I am new in coroutines. So now I look how to use coroutines instead of handlers The Handler code: fun Handler.repostDelayed(func: Runnable, delay: Long) { removeCallbacksAndMessages(null) postDelayed(func, delay) } Analog in Coroutines inline fun AppCompatActivity.repostDelayed(crossinline func: () -> Unit, delay: Long) { lifecycleScope.cancel() lifecycleScope.launch { delay(delay) //debounce timeOut func() } } But it does not work. Could You fix my...

I'm using Android Studio 3.5.3 to migrate my project to AndroidX. When I rebuild my app I got these errors: kotlin versoin: 1.3.61 Execution failed for task '🤖kaptGenerateStubsNoAnalyticsNoCloudNoAutostartDebugUnitTestKotlin'. Could not resolve all artifacts for configuration '🤖noAnalyticsNoCloudNoAutostartDebugUnitTestCompileClasspath'. Failed to transform file 'unmocked-androidandroid.jar' to match attributes {artifactType=android-classes, org.gradle.usage=java-runtime-jars} Execution failed for JetifyTransform:...

How to integrate stripe on android with kotlin and firebase Good morning, I develop a mobile application under android with kotlin, I have a firestore database, set up hosting and functions but I don't know how to make a payment and register the card afterwards to be able to use it without reserving, so I ask you to help me to explain how it works? PS: the official stripe documentation and the firestore/stripe tutorial from google didn't help me. Bonjour, Je développe une application mobile sous android avec kotlin, je dispose d'une base de...

Converting a kotlin project from pom.xml to build.gradle [closed] I am trying to convert my kotlin project from pom.xml to build.gradle with no success. my github project: https://github.com/sharon77242/Avro2AvroWithDozer I have a working pom.xml and when i compile with "mvn compile" it works perfect and runs tests. trying to build a new build.gradle to work with gradle with no success (inside the repo i have the build.gradle attempt) what am i doing wrong? how can i...

Is it possible to set different font families for rtl and ltr in Kotlin? I have an app with 2 languages arabic and english. I was just wondering how can I possibly change the fontfamily for just the rtl without affecting the appearance of ltr content. Is there a code I write somewhere where it can change an entire apps font family depending on the direction? Because the default arabic text set at the moment makes the text very ugly in the app.

Is there library for this FAB on below image? This image is an example of what is intended.

Wrapped into a reference object to be modified when captured in a closure so I am a little new to Kotlin on android and very confused on what "CLOSURES" are. I have watched a ton of videos as well, but nothing. I finish initialize the mutualList on line 5, but then I am not able to set values to it within the try/catch block. Can anyone please help me. private fun returnArray(url:...

How to combine distinct and sort in spring data jpa specification query with joins Example setup: Entity @Entity class Book { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) var id: Long? = null @ManyToMany(cascade = [CascadeType.PERSIST, CascadeType.MERGE]) @JoinTable(name = "book_authors", joinColumns = [JoinColumn(name = "book_id")], inverseJoinColumns = [JoinColumn(name = "author_id")]) var authors: MutableSet = HashSet() @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "publisher_id") lateinit...

How do I flush part of the Apache Beam window? After playing with Beam I have to ask here. Is there way to build pipeline that Buffers items for X+2 seconds by event time; Flushes first X seconds worth of data; Goto step 1; I've been reading documentation for a week and I'm at loss. I can't understand how triggers work at all. I need it because I want to buffer items from PubSub which doesn't guarantee order but de-risk it by buffering a bit more than I need. Here is what I have so far (Kotlin). I attempted to simulate PubSub lag for...

Can I delay code in sequence in Android Studio? I am trying to delay code in sequence in android studio? ie. something like so: delay(1000) //code 1 delay(1000) //code 2 Which will delay 1 second before executing code 1, then wait an additional 1 second after that before executing code 2

Kotlin Schedule notification with mp3 resource i have a folder of mp3 files that i need to schedule a notification from , so i put them in assests/sounds/1----10.mp3 i can easily access them with private fun listAssetFiles(path: String): ArrayList { try { var list = getAssets().list(path)!! var res = ArrayList() for( item in list ) { res.add("$path/$item") } return res } catch (e: IOException) { return arrayListOf() } } for playing with MediaPlayer , but...

Kotlin - Multiple animations at the same time and/or repeating after each other I am trying to create a game app in Android Studio. The concept is: there are circles falling down and you need to click/press them to make them dissapear before touching a line at the bottom of the screen. To do this I create an ImageView with a circle as an image. I have it appearing at the top and it moves down at a slow speed. When I press it, it dissapears. The problem is, the second circle appears after the first which is good, but the downwards animation is not starting and the...

Password Regex Kotlin Can anyone help me, please tell me what is wrong here?? val pass_pattern = """^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#${'$'}%!\-_?&])(?=\S+${'$'}).{6,}""".toRegex()