Is it possible to programmatically scroll to a child of on appbarlayout? (app_bar_scrolling_behavior) I want to programatically scroll to view3 on some action to an item in recyclerview.Is there any solution for this?

Room @Transaction not working with Flowable I have a problem with using @Transaction annotation on my data source method. Looks like this annotation not working in my case. I have a usual room database with DAO @Database(entities = [MyEntity::class], version = 1) abstract class MyDatabase : RoomDatabase() { abstract fun myDao(): MyDao } @Dao interface myDao { @Insert fun insertAll(list: List) @Query("SELECT * FROM MyEntity") fun observe(): Flowable @Query("DELETE FROM MyEntity") fun clear() } Problem...

How to simplify Observables.combineLatest() when resulting data are from the same sealed class? I have an Event sealed class like this : sealed class Event() { object EventX : Event() object EventY : Event() } and a function that combines two Event sources : private fun observeEventX(): Observable { // ... } private fun observeEventY(): Observable { // ... } private fun combineEvents(): Observable { return Observables.combineLatest( observeEventX(), observeEventY() ) { eventX, eventY -> listOf(eventX, eventY) } } Is...

Context Menu Does not Appear on a Webview I have a custom WebView. class NewWebView : WebView { private val name = "Android" private var mOnScrollChangedCallback: OnScrollChangedCallback? = null private var onJSEventListener: OnJSEventListener? = null constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs) { prepareWebView() } constructor(context: Context?) : super(context) { prepareWebView() } constructor(context: Context?, attrs: AttributeSet?, defStyle: Int) : super(context, attrs, defStyle) {...

Debugging Kapt3KotlinGradleSubplugin.kt in kotlin-gradle-plugin for kotlinv1.3.30 Error Facing: Type inference failed: Not enough information to infer parameter T in fun emptyList(): List Please specify it explicitly. The file reference: <a href="https://github.com/JetBrains/kotlin/blob/v1.3.30/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/Kapt3KotlinGradleSubplugin.kt" rel="nofollow...

How can I use my custom authentication in Firebase Authentication? I am using Firebase authentication for my android app project. I know Firebase offers some authentication providers like google,email,phone number,Facebook,GitHub etc.Here my problem is how can I implement simple username and password authentication as a login credentials for app.Here i don't want to use any providers.Simply a name(String) and a password(String). Since I am new to Firebase.Please kindly help me to solve this problem. My friend suggested me about using anonymous login.But I...

hello, how can i add 2 data, an editText and a TextView to generate a qr code in koltin //I have searched a lot of information about this but i have not found any example in this language. //I'm using this code to generate from editTEX. //"value" is the text i'm generating //thanks for your time :) enter code here class Final : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_final) val editText: EditText = findViewById(R.id.value) findViewById(R.id.value).setOnClickListener{...

Firebase and Google Maps Markers How would I use Firebase to place markers on a map using Android Studio?

CardView overlaps existing views on close transition I'm trying to implement a collapsible cardview, the opening transition works fine but the close transition overlaps the views below, see GIF (link due to getting embed errors): I have tried using android:animateLayoutChanges="true" but it did not work. Layout code:...

Kotlin type inference for multiple possible types? I have a function that takes parameter metadata of two possible types: Metadata1 or Metadata2. I'm trying to write a utility function that can be used for both since there is a ton of code reuse. Both of them have a list of DataPoint objects, each of which has name() method. I thought in my code Kotlin would use type inference to know that dataPoints can only be one of two types that both have DataPoint.name() method, but I'm getting "unresolved reference: name". How can I make this function...

how can i pass a ArrayList of Model to other fragment i have a model and in my model there is some value (Title : String ) (Price : String ) (image : Int ) ... i'm used live data and i could that pass a string to other fragment / it want to know how pass a ArrayList of My Model to other fragmetn with livedata? ... there is Something else beter ? i use kotlin in android i tried to pass a string to my other fragment and it worked fragmetn1 : Fragment inflater(R.id.fragmetn1 , conatiner , false ) fragmetn 2 : Fragment inflater(R.id.fragmetn2 ,...

About generics causing ClassCastException LinkedTreeMap cannot be cast to Any Kotlin Code class ResponseBody { var code : Int = 0 var msg : String = "" var data : T? = null } class ExampleT { var text: String = "" // var list: List? = null } // utils fun fun request(json : String) : ResponseBody? { val gson = Gson() var responseBody: ResponseBody? = null if (json.contains("code") && json.contains("data")) { responseBody = gson.fromJson(json, object : TypeToken() {}.type) } else { val tdata : T =...

Property expansion not properly binded with Configuration properties class Property expansion are not properly resolved when the property is binding using ConfigurationProperties. Or more specifically when the property being expanded isn't present, the binding doesn't fail and the property name is used as the value. Let's look at the following scenario // The binding class open class MyProperties { lateinit var myValue: String } // The configuration @Configuration @EnableConfigurationProperties class MyConfig { @Bean @ConfigurationProperties(prefix =...

How to add consent form to application correctly? I need to add consent to the application and the following questions have appeared: After SplashScreen I have Interstitial ads enabled, if I want to add a consent form, as I understand it, I need to add it before the first advertisement appears. Is it okay to show it directly on SplashScreen? And show Interstitial ads in onConsentFormClosed (), and after the ad is closed, just as before, switch to MainActivity? My application has a lot of windows with different advertisements (Banner,...

how to prevent showing notification when user has logged out from app I'm using FCM to send my users app notification, I also store user status(which is logged in or not) using shared preferences. when I send notification to my users all of them will receive message, how can I prevent receiving message for users who are not logged into app?

why java decompiler does not show the correct code with lambdas? I have this simple kotlin class: class MyClass { private val x: Int = 10 val m: (Int) -> Int = { a: Int -> a*a + a } } and I used the IntelliJ decompiler and this is the java code: public final class MyClass { private final int x = 10; @NotNull private final Function1 m; @NotNull public final Function1 getM() { return this.m; } public MyClass() { this.m = (Function1)null.INSTANCE; } } as you can see there is no sign of...

Time difference program code in kotlin language not working,like (3h.15m.10s-2h.10m.5s=1h.5m.5s&lt;wrong&gt;) [closed] Sir, in this site the code not giving me the right time difference like(3.15.10-2.10.5=1.5.5) that's wrong. https://www.codeblah.com/kotlin-program-to-calculate-difference-between-two-time-periods/

How to save edittext to file in Kotlin when using a fragment? I am trying to save an edittext input to a file upon clicking a button, but the app keeps crashing when I use the writeText command. Note, I am trying to do this in a fragment. Any ideas on what is causing the app to crash? override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? = inflater.inflate(R.layout.fragment_info, container, false) override fun onViewCreated(view: View, savedInstanceState: Bundle?) {...

Is there an Android ViewPager method which loads at scrolling? I have a list of images that you can scroll down one after the other. For every picture that is displayed, I want to check whether the list is complete (which has worked so far). If I have reached the end of the list and swipe one more picture, then I have not found a method that allows my list to be changed (or expanded) again. To test this, I built an algorithm into ImageAdapter's getCount method. (The method is called twice at the start of the activity, and the first two images are loaded...

Get particular key value from json in android (kotlin) I'm beginner in android (Kotlin).I am getting the Following json from the HTTP Response. { "status": 1, "userDetails": [ { "AL_ID": "2", "User_Id": "admin", "User_Password": "admin", "Created_Date": "2020-07-30 112355" } ], "lastlogin": "2020-08-20 122947" } I want to get status value from this json. How to get it.

Continue listening to Firestore updates on Android after closing app Currently I have written custom LiveData class, which adds snapshot listener to document reference while being observed, thus providing easy way to update UI. I want to continue listening to the same document after app closes, and show updates in notification. What would be a good way to do that? I have little experience with services, etc. but if I understand corectly, I should use either WorkManager or foreground service. Is there a solution which would allow to use the same listener for UI...

How to fix " code should explicitly check to see if permission is available " error I have simple fragment that aim to fetch user current location. The error I got is clear, we need to check if the user grant us location permissions: Call requires permission which may be rejected by user: code should explicitly check to see if permission is available (with checkPermission) or explicitly handle a potential SecurityException But I already made permission check, basically the fetch couldn't be done without user granting us permission, so why do I need to check twice? My flow...

Is there any operation to multiply each element in the first array to each element in the second array in Kotlin? Is there any function (like fold, map, filter), which gets 2 arrays and lambda-function (for example multiplication) as parameters and returns third array? I've used cycle for, but is there more beautiful method?

Why does .add only write to one index in kotlin? I have seen a question similar to this one here :Kotlin .add overriding all items of list in MutableList , but this question's problem is due to the fact that there is a object involved that is written to a list over and over a singleton issue.I am looking to understand why my MutableLists are ending up with a size of 1 , the value of i changes every loop keeping in mind that I...

Mockito's `thenReturn` returns `null` instead of Pair(null."text") when called by tested class and not directly Testing and Mockito beginner here, so I hope it's just some simple error. My test is crashing beacause Mockito returns null where it should return non-nullable Pair. In live environment this code works fine (no NPE), but I cannot make the test pass with Mockito. Troubling mock: val mks = mock(MyKeyStore::class.java) `when`(mks.createKeyStore(user,pass)).thenReturn(Pair(null, "userExists")) MyKeyStore.createKeyStore() returns non-nullable Pair suspend fun createKeyStore(user: String, ksPass:...

Group a list by child elements list value in kotlin I have 2 data classes data class Channel ( var ID : Int = 0, var ParametersList: List? = null ) data class Parameters ( var ParamKey : String = "", var ParamValue: String = "" ) I have a list made out of Channel class var channelList = mutableListOf( Channel(0, mutableListOf(Parameters("SensorGroup","ABCD"),Parameters("Mode","1"))), Channel(1, mutableListOf(Parameters("SensorGroup","ABC"),Parameters("Mode","1"))), Channel(2,...

android galaxy battery share(PowerShare) app permission I'd like to use PowerShare(give some battery to another phone) function in my app. I searched for a long time but I couldn't figure it out. How can I use battery share function in my app?

OutOfMemoryError while downloading files using AsyncHttpClient I occur an OutOfMemoryError while performing the async download of ~2k files (0,5MB each). On my local machine, everything works fine but while doing that in a docker image it lacks memory. I don't want to bump my docker image memory allocation to the size of my local machine (although if it will be the only possible way I will do it). To download each file I use such a method: static void download(String fileUrl, File localFile) throws HttpException, CannotReadException,...

NotSerializableException: kotlin.UNINITIALIZED_VALUE after setting minifyEnabled true After setting minifyEnabled true in app build.gradle script I starded to receive this exception: Caused by: java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = some.package.SomeClass) at android.os.Parcel.writeSerializable(Parcel.java:1767) … Caused by: java.io.NotSerializableException: kotlin.UNINITIALIZED_VALUE Crash occurred when I try to pass class SomeClass : Parcelable to another activity. I tried to whitelist all app classes with...

How to define direction in request with pageable parameter? I have a query that takes pageable as a parameter. I define the direction as DESC but this takes no effect. This is my request. Could you please help me formulate the requests in a way that the results come back sorted in descending order? Thank you This is the controller code: @GetMapping fun listMessages(@RequestParam conversationRef: String, @RequestParam fromDate: Instant, @RequestParam toDate:...