Can not resolve symbol Fragment XX impl I have a fragment under mainActivity, and the mainActivity using data binding wrap fragment: // activity_main.xml The LoginFragment also use data binding with LoginViewModel: ... But when I compile project, the line import com.example.dccandroidapp.FragmentLoginBindingImpl;, it report a error show the binding is false....

Edittext is leaking using leakcanary Logs of leak canary leakTrace= ┬ ├─ java.lang.Thread │ Leaking: UNKNOWN │ Thread name: 'Studio:InputCon' │ GC Root: Java local variable │ ↓ thread Thread. │ ~~~~~~~~~~~~ ├─ com.android.tools.profiler.support.event.InputConnectionWrapper │ Leaking: UNKNOWN │ ↓ InputConnectionWrapper.mTarget │ ~~~~~~~ ├─ com.android.internal.widget.EditableInputConnection │ Leaking: UNKNOWN │ ↓ EditableInputConnection.mTargetView │...

Missing local Notification in Android (Kotlin) I am scheduling multiple notifications using the Alarm manager as per my requirements. But randomly missing some notification. Mention below is my code can anyone help me to come out from this. val intent = Intent(baseContext, AlarmTime()::class.java); intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.putExtra("scheduled_activity", "hello"); val pendingIntent = PendingIntent.getBroadcast(baseContext,System.currentTimeMillis(), intent,...

How to replace findViewById in kotlin? (Exoplayer and RTMP) I'm working with Exoplayer RTMP player but I'm facing this problem. I am new to kotlin and really don't know how to replace this. Anyone can help? Thank you

setOnCreateContextMenuListener is not working in RecycleView OnBindViewHolder I am using setOnCreateContextMenuListener in onBindViewHolder, but the context menu listener is not triggered when I using setOnLongClickListener in the onBindViewHolder. override fun onBindViewHolder(holder: friendsAdapter.ListViewHolder, position: Int) { holder.tvUsername.text = listFriends[position].username holder.tvEmail.text = listFriends[position].email mBundle = Bundle() holder.itemView.setOnClickListener{...

Cannot create Room database in ViewModel I'm creating Room database by following the guide that provided Google. Room Codelabs Guide But cannot initialize database variable in my ViewModel, although doing everything same as in the guide. QuizViewModel class QuizViewModel (application: Application): AndroidViewModel(application) { private val repository: QuestionRepository val questions:...

How to search for a specific date after converting the date into a timestamp and storing it in SQLite I get timeInMillis of calendar, and store it into SQLite. My code is as follows: fun insertExerciseModel(exerciseModel: ExerciseModel) { val exerciseContentValue = ContentValues() ... exerciseContentValue.put(Contract.ExerciseEntry.CALENDAR, exerciseModel.calendar.timeInMillis) ... writableDatabase.insert( Contract.ExerciseEntry.TABLE_NAME_EXERCISE, null, exerciseContentValue ) ... } I can search all row from table and order by...

What is the difference between Dispatchers.Main and Dispatchers.Default in Kotlin coroutines? What is the difference between Dispatchers.Main and Dispatchers.Default in Kotlin coroutines? I used viewModelScope.launch {} and launch block as expected is executed on UI thread. Then I discovered that it defaults to viewModelScope.launch(Dispatchers.Default) {}. This was a bit confusing to me as I thought that I should use Dispatchers.Main to perform operations on the UI thread. So far it looks like that on Android Dispatchers.Default is defaulting to Dispatchers.Main. Is that right?...

kotlin 1.3 - not able to access jodajs from jsMain I am trying to create a kotlin Multiplatform library which can later convert into java and javascript using  IDEA 2019.3, kotlin 1.3 . In the jsMain I am trying to add some logic to manipulate Date and I decided to use joda js (https://mvnrepository.com/artifact/org.webjars.npm/js-joda/1.10.1) and in the gradle file I added following block js().compilations.main.defaultSourceSet {...

FileProvider: Installing APK. There was an error parsing the package. - Updating apk without Playstore I would like to update my apk by itself without using the playstore. I read this: Android install apk with Intent.VIEW_ACTION not working with File provider <a href="https://stackoverflow.com/questions/38200282/android-os-fileuriexposedexception-file-storage-emulated-0-test-txt-exposed">android.os.FileUriExposedException: file:///storage/emulated/0/test.txt...

@Validated annotation not working in kotlin class, same java code works I'm have kotlin get request. Validation are not working, Possible to specify day of week more or less validate limits @RestController @Validated open class GetCrab { @GetMapping("/v1/get") fun getNameOfDayByNumber(@RequestParam dayOfWeek: @Min(1) @Max(7) Int?): String { return "ok" } } In the same java code validation works @RestController @Validated public class GetCrab { @GetMapping("/v1/get") public String getNameOfDayByNumber(@RequestParam @Min(1) @Max(7)...

How to get file in Android outside Activity class using Kotlin So I have a RecipeListActivity which has a RecyclerView and a DataManager.kt class in which I have the recipes stored in a HashMap. I need to read those recipes from a .xml file. I managed to access it from The RecipeListActivity using assets.open, however I need to access them in the DataManager class and I can't use assets.open there. So in my DataManager class I have the following function which runs on init(). private fun seedRecipes() { val parser = XmlPullParserHandler() val...

Android rejects deploy of RESTful Server with Spark framework I aim to deploy a RESTful server on Android with minSdkVersion 23. I have used the Spark micro framework and tried to set up the port to 8080. However, as soon as the code reach that operation, the line is skipped with an Info message into the Logcat. The application does not crash but the flow is not correct. This is the content of the message. Rejecting re-init on previously-failed class java.lang.Class Have somebody...

Kotlin GoogleMaps ClusterManager returns cluster items size smaller than size of items initially passed to it I am using a ClusterManager to cluster potentially thousands of markers. The default clustering shows values like 10+, 100+, 500+, etc and I needed to show the exact value. I therefore overrode getClusterText(bucket: Int): String. When completely zoomed out, the one cluster showing on the map would show 3987 and yet I passed 4000 markers to the cluster manager. I then thought it had to do with caching or something, so I zoomed in to see if all markers were where they were expected. Lo and...

Trying to print an output using kotlin language but the code is not running, see the code below but there are errors still, Thanks fun main() { println("Enter number") val x:Int= readline()!!.toInt() println("Enter number") val y:Int= readline()!!.toInt() println(x+y) } Each line has been carefully selected but the code is returning errors.

As a complete beginner, Do I start learning Android App development through Java or Kotlin? [closed] I am second year Engineering student and am interested in learning Android app development. I am unable to make up my mind, whether to start learning through Java or through Kotlin. Also mention some good sources to begin, if possible.

editText widget lags alert dialog popup speed Creating an empty alert dialog box at compile time and activating it at run time results in no lag when the box pops up, but as soon as I add an editText (Plain Text or Multiline Text) widget to the xml resource layout file for the alert dialog, it lags the dialog popup speed by 2 to 3 seconds. I tried all sorts of changes to fix this but no luck. For example, I've used all the different layout containers including contraintlayout and changed various attributes to the editTexts but with no...

Mysterious indexOutOfBoundsException involving a measureLimit in Android My code works perfectly 99% of the time, but if I mash the keyboard long enough, I can sometimes get it to throw an IndexOutOfBounds exception. I can't tell you exactly how to reproduce it, because I can't reproduce it myself without literal minutes of keyboard mashing. The bounds match the character limits on my different editTexts, but I can't work out what is causing an operation to try to do something outside of bounds. The error has been triggered (indirectly) by the...

Calling implemented interface method from another class kotlin Recentli I run into unexpected problem while translating bits of code from Java to Kotlin. When calling context.foo(true) from the class, I cannot get it right. I tried using even explicit Activity, but it won't work either. Problem, I think, is mainly becase in class B, I have interface, which I am implementing in class A, and from class B I'm calling iplemented functions in A. In Java, it works, in Kotlin, Android Studio is scolding me. I may try a different approach, such as discarding...

Error running android: Gradle project sync failed for Duplicated

TextInputLayout leaves blank space when error is set to null I have a little problem with UI. I'm using com.google.android.material.textfield.TextInputLayout to do a login, and set errors in an easy way. Situation: I have the TextInputLayout empty and there is no error to show. Then when the user starts to write, I set TextInputLayout.error = "Error Messge". Since here everything is correct. ...

How to specify attribute name for use in entity graphs? I’m trying to get the hang of Hibernate and Kotlin, and so I defined an entity like this: @Entity class VolumeFlow( // ... @OneToMany(fetch = FetchType.LAZY, mappedBy = "volumeFlow", cascade = [CascadeType.ALL]) private var _volumesPerHour: MutableList = ArrayList() ) { var volumesPerHour: List get() = Collections.unmodifiableList(_volumesPerHour.toList()) set(value) { _volumesPerHour.clear()...

Is possible with array-contains to query for a specific property of an object stored in an array? [duplicate] This question already has an answer here: How to query documents containing array of objects in Firestore collection using whereArrayContains() filter on Android? 2 answers I have this document: uid \_ email: "user@email.in" \_ phone:...

Not able to run unit tests on kotlin Multiplatform project I am trying to create a kotlin Multiplatform library which can later convert into java and javascript using  IDEA 2019.3, kotlin 1.3 . I created a simple junit (4) test class and configured it as follows. package sample; import org.junit.Test; public class Tests { @Test public void test1(){ System.out.println("here"); } } But while running, it’s failing with Process finished with exit...

How do I add morphing and animation to android Material views? I have been researching on how to implement smooth animations that involve morphing a view into another. For example I would like to morph a floating action button into a custom view like shown in the video within the link. Material design does not provide advanced tutorials like this. I also looked into spring library to add physics to animations. Is there anywhere that a has a solid tutorial that incorporates the morphing and physics into an animation? <a...

Variable expected error for simple addition? I have method that simply updates an attribute of another objects attribute class: class Payment { @Expose @SerializedName("payment_date") var paymentDate: String? = null @Expose @SerializedName("currency") var currency: String? = "USD" //TODO: Needs to be set programmatically from config @Expose @SerializedName("amount_paid") var amountPaid: Int? = 0 @Expose @SerializedName("amount_due") var amountDue: Int? = 0 @Expose @SerializedName("overpayment") var overpayment: Int? = null...

Android Kotlin Pusher Chatkit not loading all rooms in recycler view I'm trying to view all already joined rooms in pusher chatkit recycler view however it doesn't seem to be working. It only loads one room after I scroll. When I open the activity, it shows blank. Also, when I click on the room, the intent isn't started, it just stays on the recycler view. It should be going to the selected chat room. Through Debug, I'm able to see that I am connecting to the accessible rooms(there's 7 of them) however it only seems like one of them is being added to the...

Why won't my Boolean value change within a decision structure? I'm working on an application that checks the distance the user is from a set of coordinates against the radius of a circular perimeter defined around those coordinates to determine whether or not they have exited or entered the perimeter. here's the function & decision structure I'm using to accomplish this: private var mLocationCallback: LocationCallback = object : LocationCallback() { @RequiresApi(Build.VERSION_CODES.O) override fun onLocationResult(locationResult: LocationResult)...

Firestore get documents with maximum value I have a collection of documents: data class Game( var userId: String? = "", var userName: String? = "", var date: Timestamp? = null, var award: Int ) I want to make a rating for last week, ordered by the award and grouped by username (just 1 row for every user). This code returns all records with repetition. db.collection("games").orderBy("award", Query.Direction.DESCENDING).limit(50).get() Is any way to get users with maximum award value without repetition users? Or...

How do I set the gravity (property style) for a Toast in Kotlin (getting error)? When I write this code: var toast = Toast.makeText( this, "Toast at top!", Toast.LENGTH_SHORT ) toast.gravity = Gravity.TOP toast.show() I get the error "Val cannot be reassigned" on the toast.gravity line.