Kotlin. How to use generic types with lambda? I'm using function type onError: class Status( private val onError: (T) -> Unit ) I need to make my lambda argument covariance (with out)? Is it possible ?

How to update livedata through a method with multiple parameters I have this livedata "events" that should be updated if the method loadEvents() gets fired. The thing is, I need to pass many different parameters to that method. If I call this method and then observe the data, the data is null. How can I do this？ Viewmodel: private val _events = MutableLiveData() val events: LiveData get() = _events fun loadEvents( dateTo: String, dateFrom: String?, dateTime: String?,...

Does Switching off the Android Phone destroys the activity? I was playing with the activity life cycle today. I had logged all the lifecycle methods. I was on the MainActivity and then switched off the phone suddenly. I noticed 2 methods being called: onPause, onStop, but onDestroy never got called. Any take on this?

App crash after interegrating firebase authentication in my app My app crashes on starting it (basically any activity with firebase code) after adding firebase authentication This is the logcat 2022-07-14 201721.538 15482-15482/com.example.flimer E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.flimer, PID: 15482 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.flimer/com.example.flimer.SignUp}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo...

How to add a RecyclerView in a fragment Kotlin- I initialize the dataset but idk what to to with context ItemAdapter: class ItemAdapter( val context: Context, val dataset: List) : RecyclerView.Adapter() { Fragment: val dataset: List =ArrayList() val context: Context = //so i can initialize the-> adapter= ItemAdapter(context, dataset)

How can I fake dagger injection for Instrumented test in dynamic-feature modules? I have a simple Note Taking Application. The Application has an app gradle module and editnote gradle dynamic feature-module. Hence my editnote gradle module will depend on app gradle module [because feature-module is not not resolved at the compile time] My app contains an ApplicationModule dagger module and ApplicationComponent. Similarly my editnote contains EditNoteModule and EditNoteComponent. @Module open class EditScreenModule { @Provides @Named("TutorialText") open fun...

Why android room database query doesn't work What I am doing wrong? Model class @Entity(indices = [Index(value = [ "id_mess"], unique = true)]) class MessengerModel ( @PrimaryKey @ColumnInfo(name = "id_mess") var id_mess: Int, var id_fr: Int, var id_to: Int, var dt: Long, var message: String ) ModelDao class @Query("SELECT * FROM MessengerModel WHERE ( (id_fr = :his_id AND id_to = $MY_USER_ID) OR (id_fr = $MY_USER_ID AND id_to = :his_id) ) AND id_mess < :id_message") fun...

ClassCastException when using Mockito.thenAnswer I am new to Kotlin. I get exception when trying to use Mockito's thenAnswer method Controller: @RestController class SampleRestController( val sampleService: SampleService ) { @PostMapping(value = ["/sample-endpoint"], consumes = [MediaType.APPLICATION_JSON_VALUE], produces = [MediaType.APPLICATION_JSON_VALUE]) fun sampleEndpoint(@RequestBody values: List): ResponseEntity { val response = sampleService.serviceCall(values) return...

How can I merge layouts in scrolview? I am using scrollview as horizantal and vertical. I have two child layouts, I want to add them in this scrollview. Like in the picture, spinners are inside of edittexts, actually I want to add them next to them just vertically. How can I execute this? for(i in 1..rows) { for(i in 1..colomns)...

CopytoClipboard not working in Adapter to show in recyclerview I have a recyclerview with adapter (to show external strings)and I'm trying to click a button "copy" so that it copies the strings in view to the clipboard. CardLayout.xml Button to use as copy button is android:id="@+id/copyactivity" And this is my TaskAdapter.kt package com.example.what2do_v6.Adapter import android.content.ClipData import android.content.ClipboardManager import...

Activity never becomes requested state "[CREATED, RESUMED, DESTROYED, STARTED]" (last lifecycle transition = "PRE_ON_CREATE") I'm taking a Android Basics in Kotlin course and I'm stuck in this codelab: <a href="https://developer.android.com/codelabs/android-basics-kotlin-affirmations-test-lists-and-adapters?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-kotlin-unit-2-pathway-3%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fandroid-basics-kotlin-affirmations-test-lists-and-adapters" rel="nofollow...

If statement not working yet used correctly class SignUp : AppCompatActivity() { private lateinit var auth: FirebaseAuth private var etEmail: String? = null private var etPass: String? = null private var etPass2: String? = null private lateinit var btn: Button override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_sign_up) // Initialising auth= Firebase.auth etEmail = findViewById(R.id.et_email).text.toString().trim() etPass =...

I have to turn the date that comes from API to this format " starts in 10 days 23 h 34 m" from this format "2022-07-24T05:32:05.000000Z" I understand how to format in other forms but I don't know how to format in this way. @SuppressLint("SimpleDateFormat") fun String.toDateMixedString(from: String = "yyyy-MM-dd'T'hhmmss.000000'Z'", to: String = "MM/dd/yyyy"): String { val date = this.toDate(from) val c = Calendar.getInstance() date?.let { c.time = it } val day = c.get(Calendar.DAY_OF_MONTH) val year = c.get(Calendar.YEAR) val monthText = c.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.US)...

How can i iterate Arraylist of an object in Kotlin? I have a arrayList of an object , and i cannot iterate my list forward or reward , i don't want to display my message in these case but it does . private fun handleLivePopUp() { // vous êtes en direct val id = presenter.programItems?.indexOf(presenter.currentProgram) // val it = presenter.programItems?.listIterator() // val previous = if (id == 0) presenter.programItems!!.size - 1 else id?.minus(1) if (id != null){ if(id == 0){ //si liste ==...

How not get out of bound in Kotlin? I got the code that compare current element with the next element in array. But it crashes with out of bound because I guess when its on the last element there is no next element to compare with so it crashes.How to handle this to avoid crash and stop comparing on the last element? Here is my code fun myFunction(arr: Array): Int{ if (arr.isEmpty()) return 0 var result = 0 for (item in arr.indices) { if (arr[item] > 0 && arr[item + 1] < 0){...

What are the use cases for AtomicFile? I'm having trouble understanding the use cases for AtomicFile. Since it does not confer any thread safety, is it just for ensuring no partial/invalid files are written if the app crashes or device loses power during a file write? What would be the purpose of reading a file with AtomicFile?

Update firestore data from populated recycler View I want to update firestore data which I have got in a Recycler view. Recycler View Activity Code class AdminActivity : AppCompatActivity() { private val dB = Firebase.firestore private lateinit var userRecyclerView: RecyclerView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) supportActionBar?.title = "Admin Panel" userRecyclerView = findViewById(R.id.user_list)...

I need it redirect to new page after clicking in listview I am designing a guide application. When I click on the person I selected from the list, it should go to the profile page I prepared. I will be very happy if you can help :)

How to download HLS audio in Android I would like to download HLS audio stored in my server using Exoplayer or any other mechanism.. Also once the audio is downloaded I would like to encrypt it. Can anyone please tell me how do I achieve it. I have read most of the article but could not find any help.

How to make item appear in the center of the screen Jetpack Compose when using LazyRow or Column? I have been trying to make it so that the first item on a LazyRow is centered in the middle of the screen. LazyRow with snapper and infinite scrolling @OptIn(ExperimentalSnapperApi::class) @Composable fun CircularList( data: List, modifier: Modifier = Modifier, isEndless: Boolean = true ) { val listState = rememberLazyListState( if (isEndless) Int.MAX_VALUE / 2 else 0 ) val configuration = LocalConfiguration.current val screenWidth =...

Button android studio, how to create a button that stops setonclicklistener function? I have a button such as I have created a setOnClickListener method and inside their is a loop. val btnClickMe1 = findViewById(R.id.button) btnClickMe1.setOnClickListener { //do something here 20 times } This method works fine, however, I have created a .apk file. When I click the button the function runs. I want to know how I can exit the loop by clicking the same button. Regardless of whether or not the loop has...

Using cookies in Exoplayer streams I'm trying to stream content from a url that returns a 404 if you're not logged in or a 302 redirect if you are. To log in, I need to pass a cookie in the headers for Exoplayer's requests, but I'm struggling to work out how. Previous answers suggest using a default Cookie Manager instance with your cookies already set. Others suggest setting the header as a map in HttpDataFactory.setDefaultRequestProperty. Neither have worked for me. Here's my working so far. val cookieManager =...

Apk development code - &lt;application android:name= "com.example.nameofapp.BaseApplication"&gt; how is it included in the project or the libraries? Good afternoon, im new to app development and I would like to see if there is someone who can give me like a tip or advice on this particular problem. Basically this apk is going to use features from another apk and I think I understand how it's integrated inside the code, for example: '''

while i made plugin with kotiln this error occur but i dont know what is the problem in running server this is the code package com.github.noonmaru.aimless.plugin import com.comphenix.protocol.PacketType import com.comphenix.protocol.ProtocolLibrary import com.comphenix.protocol.events.PacketContainer import com.comphenix.protocol.wrappers.EnumWrappers import com.comphenix.protocol.wrappers.PlayerInfoData import com.comphenix.protocol.wrappers.WrappedChatComponent import com.comphenix.protocol.wrappers.WrappedGameProfile import org.bukkit.Bukkit import org.bukkit.entity.Player object...

Intent.createChooser not working for sharing image in REDMI xiomi devices Intent.createChooser not working for sharing image in REDMI devices I am saving image locally in my external storage of device and then passing the URI of that image in Intent.putExtra(Intent.EXTRA_STREAM, uri) and MIME type as image/jpg and then using Intent.createChooser . It works perfectly in all android devices but in REDMI devices the image get stored but I dont see the options menu for social media apps.... First I am calling share image and from which I am calling saveMediaToStorage...

Validate valid phone number entry I want to figure out invalid phone numbers entered in edittext before hitting the OTP api. Invalid phone numbers pattern may looks like these patterns +91-0000000000 / +91-0000000011 / +91-1234567890 ...and so on. Already added a check to validate invalid phone number but it didn't helps in detecting invalid patterns of phone numbers which can't exist. private boolean isValidMobile(String phone) { return android.util.Patterns.PHONE.matcher(phone).matches(); } Anyone please suggest how...

How to implement Copy of image and text to Clipboard in Android I am developing an App in which I require a functionality of copy of text and also Image whichever the user wants and paste it in app . so far I have accomplished the copy and paste of text data and also I have successfully copied the Image to clipboard but my application is not showing the copied image in keyboard like below also I don't know how to handle after the image shows in keyboard in my application and the user clicks on it in my app. <a href=""...

Get Person's shirt color using Pose Detection(Android) I am developing an app where I want to detect the color of the person's shirt using pose detection. val allPoseLandmarks = pose.getAllPoseLandmarks() val leftShoulder = pose.getPoseLandmark(PoseLandmark.LEFT_SHOULDER) val rightShoulder = pose.getPoseLandmark(PoseLandmark.RIGHT_SHOULDER) val leftElbow = pose.getPoseLandmark(PoseLandmark.LEFT_ELBOW) val rightElbow = pose.getPoseLandmark(PoseLandmark.RIGHT_ELBOW) val leftWrist = pose.getPoseLandmark(PoseLandmark.LEFT_WRIST) val rightWrist =...

How to draw on a relative layout? I know it is only possible to draw on a canvas, however, my situation does not allow me to do as such(or maybe I do not know how to do it.) In any case, this is the video that I have followed, it is very simple, which teaches how to draw based on touch inputs on a canvas. () This is the most commonly used method to draw, by having 2 classes, 1 which extends View(so as...

Add var from .kt in activity main i had a QR Scanner from the internet. But my Kotin skills are not available... How can I add a COUNTER, that count my times, I scaned a code? Now I want to see that counter in the activity main. But how can I put a Text to that?