How to add different XML items in a Firestore Recyclerview Adapter I recently changed my normal RecyclerViewAdapter to a Firestore RecyclerViewAdapter. Before the change, I would check if the recyclerview is at the end by getting the item count of the list passed to the recycler view. I would then use this information to add a button at the end of the recycler view. However, with a firebase recycler view adapter, there is no way to get the number of items in the list passed in the Firebase recyclerview adapter as it is updated in realtime. That being said,...

How to monitoring resources? Hy I have a problem. I develop an Android application, and the users complain, because the app is slow, reather than, not as fast as before the update. One of the layouts appears slower than before update. The fragment contains a lot of observers. So I don,t know why. I would like to monitoring the usages, I found Profiler in android studio, but i don't know what should I see. Cpu usages always under 70%, and memory usages is about 174 mb max

How to print on the screen having an API request? I have been several tutorials to create an API request and printing on the screen, and all the tutorials I did have some deprecated function that now I can't use. What I have? I have the API request as you can see in the code, but now I need to print on the screen. And I don't know how to do it PS: I use okhttp and the gson library class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)...

How change selectorColor attribute in SegmentedButton i am using a library SegmentedButton in my project. I need to change the selected color programmatically at the time of a button click. But the color doesn't change. I need to change the selectorColor while switching to the second tab XML My attempts to programmatically change the color thicknessUnitSwitch.backgroundColor = ContextCompat.getColor(...

One service instance under several Eureka Servers simultaneously I'm trying to register one service (spring, kotlin) in several Eurekas but fail to do so. The requirements are that there're two separate servers but they want to call the same instance of one particular microservice from both clusters. The service should register in two eurekas so when services under each of them need it they will routed correctly. The idea is that it's two...

Json object response in kotlin I am facing issue in get response in kotlin. My json response is: { "message":"Success", "status":false, "data":[ { "id":"1", "username":"doctor", "phone":null, "speciality":"General Physician", "name":"Doctor", "firstname":null, "lastname":null, "gender":"", "age":null, "dobirth":null, "email":"doctor@live.com", "country":"Pakistan", "state":"Punjab", "city":"Lahore", "address":null, "affiliation":"", "degree":"MBBS", "bio":null,...

Create abstract class with generic Type in Kotlin I am so confused, I've been searching how kotlin generics work, but I don't get it at all. Basically, I have BaseAnimalDetail class, wich it's being used with some classes extending Animal class. At the moment, there are a lot of when in the BaseAnimalDetail class, so my goal is to avoid all those when, just extending BaseAnimalDetail whenever I need, for each class that extends Animal` open class BaseAnimalDetail { private var animal: T? = null fun setAnimal(animal:T){...

List<Enum> to Json format I have this enum class enum class TransactionType {NEGATIVE, WITHOUT,AFTER} And then I have a mutablie list that I need to convert to JSON format. MutableList? = null Can you please help me understand how to do that? I am looking for a correction to what I currently have (below picture):

Zoom in /out scrollview in Kotlin Firstly I used the site below for refferance and zoom in directly the table. But here is no any error but it didn't work. https://developer.android.com/training/gestures/scale#kotlin After that I tried to make a zoomable timetable in scrollview. But same issue happened again. Note: The timetable in a fragment so I used 2 setContentView. class MainActivity : AppCompatActivity() { private...

Late init in Kotlin I write a code to login and email and google sign in but I got and error in Logcat,so I read it and it caused by late init proverty in my code,I try searching pproblem in overflow but I did not find anything kotlin.UninitializedPropertyAccessException: lateinit property auth has not been initialized Caused by: kotlin.UninitializedPropertyAccessException: lateinit property auth has not been initialized at com.example.preludeprototpe.Activity3Kt.access$getAuth$p(Activity3.kt:1) at...

Ignore Developer's Settings Animation Scale in Android My app relies heavily on animations to work, and when their speed is changed in the developer's options, the whole app breaks and stops working. I've been researching ways of ignoring the developer's settings and forcing the animations to run as they should, but it is not changing anything really. I'm calling this function in my App's Application Class' onCreate: private fun fixAnimation() { val durationScale = Settings.Global.getFloat(contentResolver,...

Kotlin It is possible create file writable for all apps? I cant find any example to create simple JSON file in file system Writable in 2 different apps worked in 29 API and lower I need way to send some piece of data between 2 my apps

Mockk: How to mock object id being generated when object is saved In my test I need to mock a situation, when new object is saved into database using entity manager (em) and during that process, id property of that object is set to auto-incremented id of that row in database. I would like to set that id property to my own value that I could match later in the test. I'm using mockk 1.9.3 and kotlin 1.4.0. So far I have this: val myVal = 123 every { em.persist(any()) } answers { firstArg().id = myVal // return of the persist method em...

When ı select the image from the gallery or take a photo, the imageView looks so small in Android Kotlin. How can ı make a bigger this image? I am a new about Android Kotlin. When ı select the image from the gallery or take a photo, the imageView looks so small on my App. How can I resize it or How can ı make a big this image ? I want to see the image bigger. ı shared the my activitiy codes and layout codes. Thanks! My Actiivty code, class TakeNotesActivity : AppCompatActivity() { var selectedPicture: Uri? = null var selectedBitmap: Bitmap? = null private lateinit var db : FirebaseFirestore private lateinit var...

Firestore pagination startAfter(DocumentSnapshot) working in java but not in kotlin I am trying to convert one Android Firestore project from java to kotlin. But got stuck in pagination part, where startAfter(DocumentSnapshot) with java code is working fine. But the kotlin one is giving only first 3 result. StartAfter(DocumentSnapshot) part is not working. If you could please point out where am i going wrong in Kotlin,it would be very helpful. This is the java code which is working perfectly public void loadNotes(View v) { Query query; if (lastResult == null) {...

java.lang.IllegalStateException: Migration didn't properly handle. Tables not changed I have a problem when trying to write example test for room migration. When I run test i got above exception, however the table that causes the problem did not change between db versions. Expected: TableInfo{name='UserSettings', columns={userLocalId=Column{name='userLocalId', type='TEXT', affinity='2', notNull=true, primaryKeyPosition=1, defaultValue='null'}, value=Column{name='value', tye='TEXT', affinity='2', notNull=true, primaryKeyPosition=0, defaultValue='null'},...

Kotlin with navigation - how I can keep data in previous fragment I´m using a navigation graph and my fragment A have a recylerview. When I go to fragment B I dont wanna lost the data from fragment A when I back there. How I can do this?

Listening to coroutine from view cant be done from the views init I am trying to listen to my ViewModels MutableStateFlow from my FlutterSceneView. But I get the following error when trying to set the listener from the views init: Suspend function 'listenToBackgroundColor' should be called only from a coroutine or another suspend function class FlutterSceneView(context: Context, private val viewModel: FlutterSceneViewModelType): PlatformView { private val context = context private val sceneView = SceneView(context) init {...

@PreAuthorize with jwt token I'm trying to restrict call on endpoint only for admin. I found somehing like annotation @PreAuthorize I generated jwt token eyJhbGciOiJIUzI1NiJ9.eyJyb2xlIjpbeyJhdXRob3JpdHkiOiJVU0VSIn1dLCJzdWIiOiJ1c2VyIiwiaWF0IjoxNjAxOTk1ODQ1LCJleHAiOjE2MDIwMzE4NDV9.5Ia8MQW1ILVy33jchC2Rit5x2CKB5UbiEPD3Fq6Zj_4 and now I'm trying to use it that way: @PreAuthorize("hasRole('ADMIN')") @GetMapping fun getUser(@RequestHeader(name = "Authorization") token: String): ResponseEntity { val...

How to enqueue sequential coroutines blocks What I'm trying to do I have an app that's using Room with Coroutines to save search queries in the database. It's also possible to add search suggestions and later on I retrieve this data to show them on a list. I've also made it possible to "pin" some of those suggestions. My data structure is something like this: @Entity( tableName = "SEARCH_HISTORY", indices = [Index(value = ["text"], unique = true)] ) data class Suggestion( @PrimaryKey(autoGenerate = true)...

How to open another activity from Interface method I write an application in Kotlin language on the platform Firebase. And after authentication, I need to open another activity from Interface. While checking I get the error in this line: startActivity(Intent(applicationContext, AnotherActivity::class.java)) Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference My code: Interface: interface OnResultSuccessListener { fun onResultSuccess(isSuccess: Boolean)...

Using SerialTerminal mik3y / usb-serial-for-android KOTLIN hi guys im trying to do a serial Terminal in my App android but im stopped :(, Now i can how to append in the textview but it ins't real data. val response = ByteArray(8192) button2.setOnClickListener { setContentView(R.layout.fragment_terminal_layout) val manager=getSystemService(USB_SERVICE) as UsbManager tvterminalRawData.append("$manager \n\n\n") val availableDrivers =...

Fragment not replacing older fragment correctly I am new to android development and have been following various tutorials to begin. I want to create an App with a recyclerView in the home fragment that allows me to click each item and lead to a page of details of that certain item. The problem I'm facing is that when I click the item and present the new fragment it doesn't replace the content on screen properly, there are still elements of the other fragment in place... The structure is the following: MainActivity -> container -> nav_view...

How to check if MotionScene is at transition "start" or "end"? I have a MotionLayout with a MotionScene, and I want to do an "if-check" (in Kotlin) that checks if the scene is currently at transition "start" or "end". Does anyone know how to do this? Here is my transition "start" and "end" in the MotionScene:

A better understanding for separation of concerns. Android I am an Android developer with only 5 months of experience. I am still learning and trying to do my best. Right now I am interested in concept of Separation of concerns. I do understand what it means and I am trying my best to follow it in my android development, however, I found myself a bit confused when I started learning about Clean Architecture. I would like to show my bit of code, and if, possible, get some feedback on my implementation and its correctness when it comes to Separation of...

Unit Testing Byte Arrays in Kotlin I have a Kotlin multi-platform project which I am running within IntelliJ-IDEA. I have a function as such: fun getSomeDataBytes(): ByteArray { val x = arrayListOf() x.add(0x01) x.add(0x02) return x.toByteArray() } This function lives within a file in the commonMain module. Within the commonTest module I have a test case as such: @Test fun testGetSomeDataBytes() { val expectedResult = byteArrayOf(0x01, 0x02) val response = myModule.getSomeDataBytes()...

How can I cast a StringCol to an IntCol in krangl? I am trying to summarize some data in krangl, with some numeric data being stored in a StringCol, due to missing places being read improperly. After filtering out all the actual Strings I am now trying to summarize my data using sq .filterByRow { it["hw"] as String != "*" // Remove asterisks, they mark missing data we don't need } .summarize( "min_hw" to { it["hw"].min() } // Get the minimum value of the hw column ) Which fails due to the fact that "hw" is a...

Android Can't get image from custom camera activity on other activity Hello I have been trying to figure this our but i have failed miserably. i have my own custom camera activity which takes a picture and save it on the phone, then on activity result should get the image URI from shared preferences get the file and sent it to AWS. I had a normal camera Intent before and I noticed the file is saved with an URI similar to this " /media/external/images/1324 " ANd it worked without problem but i can not use the normal camera for my app. With my custom camera i get...

Getting null values of data class when I add "@SerializedName" annotation to fields I add @SerializedName to etch field because the ProGourd obfuscate, but now i'm get nulls values when I need to retrieve object with Room query. It should be noted that when I clear data and reinstall, everything works smoothly (Or if I'm deleting @SerializedName annotations), but of course I want to update an old build version of the app. any ideas? data class Contacts( @SerializedName("first_name") @Expose var first_name: String? = null, @SerializedName("last_name")...

Is this a bug in Kotlin's "By Lazy"? I've been trying to track down this strange anomaly and believe it's a bug in Kotlin. Whenever I click on one of the first two buttons in my UI, the last button mirrors its background and acts as though it was also clicked. I believe the bug is related to my use of "by lazy", because if I alter the code and instead use a function to assign the background the bug disappears. I made a repo of the defect here....