How to take string array as input from user in kotlin I want to take string array as input from user in Kotlin. But I am not able to compile my code. val scanner = Scanner(System.

in

) val n = scanner.nextInt() var arr = arrayOfNulls(n) for(i in 0..n-1){ arr?.set(i,scanner.next().toString()) } Let me know if anyone can help.

Spring Data JPA bulk identifier generation I have an entity, for which apart from the primary key, an extra unique identifier should be generated: @Entity class MyEntity( val otherId: String //

How to return Mutablelivedata hashmap from Viewmodel I have declared the MutableLivedata hashmap lateinit var latestMessageMapdata : MutableLiveData I am trying to return the hashmap from the below code val ref = FirebaseDatabase.getInstance().getReference("/XXXXXXX/$fromId") ref.addListenerForSingleValueEvent(object : ValueEventListener { override fun onCancelled(databaseError: DatabaseError) { Log.d(LatestMessagesActivity.TAG, "database error: " + databaseError.message) } override...

How does App like Spotify, Youtube store media on android? I didn't find any clear answers on how do these apps store their data on Android phones ? I know the data can be stored in the form a BLOB in ( ROOM )SQL database and this would be stored in app specific storage Is it the best practise to store the large media files in database and then have some sort of look up to get the data ? The files would take same size if kept as is on the file system and they you can have a lookup table in the SQL database May be they are using Firebase as they also...

How to write a test for this situation? I have two models: @Entity @Table(name = "prod_templ") class ProductTemplateModel( @Id @Column(name = "id") val id: String, @Column(name = "templ_lib") val template_lib: String, @ManyToOne(fetch = FetchType.EAGER, optional = false) @JoinColumn(name = "templ_lib", insertable = false, updatable = false) val userTemplate: UserTemplateModel ) And @Entity @Table(name = "user_template") class UserTemplateModel( @Id @Column(name = "id") val id: Int,...

Diff util not updating items UI in recycler view I am using a list adapter with recycler view, now the data class contains a variable isChecked, this is used to indicate if the user has selected this variable or not, the code is updating the list as I can see the logs (which I had put for testing purpose) return that the current list is always updated when the user clicks on a item but for some reason the changes in UI (based on isChecked variable) is only reflected when scrolling the recycler view or by clicking other items. I put a...

Need to obfuscate sensitive data without DexGuard Currently in my android app is secured by DexGuard to obfuscate strings and sensitive information like network API keys which is present inside source code. I have used DexGuarsd so that no one can reverse engineer it. However I need to stop DexGuard subscription. So If I use Android Jetpack Security EncryptedSharedPreferencesand EncryptedFile.Builder then will it help me in achieving security like the one provided by DexGaurd. For example: If I use EncryptedSharedPreferences like below code,...

kotlin error : Type mismatch: inferred type is String? but String was expected strong text How do I change it? e: C\Users\bagji\MyApplication7\app\src\main\java\com\example\myapplication\AppSettings.kt (39, 16): Type mismatch: inferred type is String? but String was expected package com.example.myapplication import android.content.Context import android.content.SharedPreferences import org.json.JSONObject object AppSettings { private val PREF_NAME = "settings_pref" // Settings val EQUALIZER_ENABLED = "settings_eq_enabled" val EQUALIZER_PRESET =...

Prevent Screen Capture in Android One Devices I want to prevent screenshot capture in android phones. I added the line requireActivity().window.setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE) This is working fine in normal devices. But when I try on android one devices, ( https://www.android.com/intl/en_in/one/ ), it is still capturing screenshots. I tried other apps like AmazonPrime, Hotstar, and GooglePay on android...

Failed to Scan QR code in Kotlin- Android? I try to scan QR code using com.budiyev.androidcode scanner2.1.0 but When I try to scan QR code using virtual scene, it got this error. E/GmsClient: unable to connect to service: com.google.android.gms.measurement.START on com.google.android.gms V/FA: Connection attempt already in progress Activity paused, time: 863855 Activity resumed, time: 864015 V/FA: Connection attempt already in progress V/FA: Connection attempt already in progress W/FA: Service connection failed:...

How to execute the same method continuously and return a value in each execution? What I would like to do is make a method continually run in the background and, on each run, return a value. Also, I have a model and I would like to store the value returned by the method in this model so that I can use this value in another class. Is it possible to do this? Method: fun generatePair(): Pair { val rand = Random.nextInt(0, 10) val num1: String? = "x$rand" val num2: String? = "y$rand" return Pair(num1, num2) } Model: data class PairData( val xData:...

How to get signed number representations of binary string Is there a method to convert a binary string into a signed integer, for example：convert the string "11110000" into -16

Cannot access password: it is private in User I want to store and access password from database but when I go to access password from database by the help entity class and spring security UserDetails it throw an error make password private ,when go to store password it throw make password public .I don't know how to handle this type of issue in spring Security. I implement the UserDetails for User and it override some function like getPassword() and its return type is String so I retun password as string argument. But Here is the issue...

How to fire again in (Flow of PagingData) if there is no Internet in the beginning Im trying to make the app with free bugs but I notes that the Flow if I hit it in the first time without internet, I can't hit it again. So my question is how to re hit the Flow any time I want, here is some of my code:- My Fragment: override fun setBindingVariables() { binding.viewModel = viewModel // I have a fotter to keep loading the data in the recycler // when the internet comes back BUT the first hit SHOULD be with Internet binding.adapter.adapter =...

failed to get value into log message? Kotlin - Firebase I trying to get specific value as a log message. But it says D/TAG: null Why it not get the value ? Here's my data class data class CityCodes(val codeNo: String? = null, val city: String? = null, val cost: String? = null) Here's my code val ref = FirebaseDatabase.getInstance().getReference("CityCodes") In Activity on create val ButtonScan = findViewById(R.id.button7) ButtonScan.setOnClickListener { val textResult = findViewById(R.id.textView9) val...

Mock whenever new instance created without PowerMockito and Mockito inline I cannot use neither PowerMockito nor mockito-inline for configuration reasons, is there a way to do similar to PowerMockito.whenNew(HandlerThread::class.java).withParameterTypes(String::class.java, Int::class.java).withArguments(any(), any()).thenReturn(handlerThread) without PowerMockito nor mockito-inline? If there is no way, is there an alternative for mockito-inline on android?

Trying to get ViewModel in @Composable Iam trying to learn jetpack compose. Iam stuck with the ViewModels. I have a ViewModel class DataViewModel: ViewModel() { //the list of live data var listData = mutableListOf() //initialize the viewmodel init { viewModelScope.launch { //do the network call (this is working ok) val data = fetchData() data.forEach { listData.add(it) //print the list of data, this is working fine...

firebase-auth sample project give s "Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'." When I try to build firebase-auth project, I am getting below errors and no idea how to resolve since I am new to android development. Could not determine the dependencies of task 'appcompileDebugJavaWithJavac'. Could not resolve all task dependencies for configuration 'appdebugCompileClasspath'. Could not resolve project internalchooserx. Required by: project :app

No matching configuration of project internalchooserx was found. The consumer was configured to find an API of a...

Android: How to translateY and expand view in CoordinatorLayout and LayoutBehaviour I am currently working on the following action in my app: A user has two elements in a view, namely an image and a very long text. When the user scrolls the text, it moves up or down according to the movement he makes. When it goes up the text rises up to half the height of the image before scrolling internally, and then if it returns it scrolls down does the reverse action. At the moment I can reproduce all this but my only problem is that I am able to obtain only the translation. I would...

How to remove/hide place for icon of menu item android I am newer in android I am using bottomNavigationView, and in menu i don't need to use icons, because of this, an empty space appeared. I've tried decrease height of menu and of bottomNavigationView but nothing is helped. Any...

How to create an ApplicationContext for tests in kotlin? I have been struggling to start an application context during tests so I can inject bean at run-time but it seems I can't get the ApplicationContext wired here is what I am trying package com.wayfair.samworkgroupsservice.adapter import io.r2dbc.mssql.MssqlConnectionConfiguration import io.r2dbc.mssql.MssqlConnectionFactory import org.springframework.beans.factory.annotation.Autowired import org.springframework.beans.factory.config.ConstructorArgumentValues import...

ObjectAnimators are two times faster then the given duration - Android I have a translate animation like this fun createTranslateAnimation(fromX: Float, toX: Float, fromY: Float, toY: Float): ObjectAnimator { val propertyValuesX = PropertyValuesHolder.ofFloat(View.TRANSLATION_X, fromX, toX) val propertyValuesY = PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, fromY, toY) return ObjectAnimator.ofPropertyValuesHolder(imageView, propertyValuesX, propertyValuesY) .apply { duration = 3000 } } I...

Inconsistent drawing (MPA Android Line Cubic Chart) I have used Line android chart with cubic mode but when it starts draw it shows inconsistent drawing: this how entry list data looks like: entry, y = 80.0, x = 2.0 entry, y = 51.0, x = 17.0 entry, y = 45.0, x = 19.0 entry, y = 52.0, x = 20.0 entry, y = 45.0, x = 21.0 entry, y = 80.0, x = 22.0 entry, y = 87.0, x = 23.0 entry, y = 80.0, x = 25.0 Any idea why this is happening and how to fix it?

Epoxy updating the epoxy attributes in the models once they have been built results in crash App has crashed, executing CustomActivityOnCrash's UncaughtExceptionHandler com.airbnb.epoxy.ImmutableModelException: The model was changed between being added to the controller and being bound Controller class class SortFilterController @Inject constructor( private val schedulersFacade: SchedulersFacade, private val generateMapOfCategoryFilters: GenerateMapOfCategoryFilters ) : EpoxyController() { private val tapCountryRelay: PublishRelay = PublishRelay.create() var...

Jetpack Compose time interval I'm trying to replicate this image component into a Jetpack Compose compatible one. It is a 24 hr time interval, in which according to an array: "timeArray": [ 19, 20, 21, 22, 23, 0, 1, 2, 3 ] I must paint in green the hours that are within that range in the array, leaving those hours that are not marked with nothing. On the other hand, the red bar indicates the position of the user's current time. I tried to realise this component with a Slider or a RangeSlider, but the result was not what...

Failed to load image using stbi_load (lwjgl used) I'm learning OpenGL following video. While it's based on C++, I attempt to use Kotlin instead with lwjgl. As I code and run this: // Something above stbi_set_flip_vertically_on_load(true) val width = IntBuffer.allocate(1) val height = IntBuffer.allocate(1) val colorChannel = IntBuffer.allocate(1) val imageBuffer = stbi_load( "src/main/resources/$filePath", width, height, colorChannel, 0 ) ?: throw...

Cant understand why this Comparison method violates its general contract I have this code Collections.sort(list, Comparator { message1, message2 -> message2.getCreatedAtDate().compareTo(message1.getCreatedAtDate()) }) It works fine for me but have noticed that there are some crashes that are happening due this comparison violating the general contract, how would that happen?

How to customize spinner with baseAdapter or set images and text in spinner defualt dialogue layout? this is my base adapter file which I am trying to set with my adapter but the error coming to no source. so please guide me if you know about this customize spinner with base adapter in kotlin I tried a java code tutorial but that code not running at my end class CustomAdapter(var context: Context, var flags: IntArray, var countryNames: Array) : BaseAdapter() { var inflter: LayoutInflater override fun getCount(): Int { return flags.size } override fun getItem(i: Int): Any? { return...

android:noHistory="true" or setting flags not working in Wearable app What I want to do is to remove the Splash screens in the stack of activities so when the user presses back, it splash screens will not show. But it seems its not working for me. This is my AndroidManifest.xml file It still doesn't work so I added flags when starting a new activity val flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP val deviceActivity = Intent(this, DeviceActivity::class.java) deviceActivity.flags = flags...

How to initiate work flow or start chain of actions in java/kotlin How to initiate work flow or start chain of actions in java/kotlin? I have a workflow which has severals steps. Each step is executed based on if conditions, if the condition satisfied we execute the step and if not satisfied move on to next step.