how to customize exoplayer layout? I want customize exoplayer layout like this image I can change icons with: app:controller_layout_id="@layout/exo_layout" but how can i change artwork layout like this photo?

kotlin string Use "" instead of .tostring Instead of typing println (sum.toString () + "\ t") From println ("" + sum + "\ t") used ? for (i in 1 .. 10) { for (b in 1 .. 10) { var sum :Int=i*b println(sum.toString() +"\t") } }

How to animate a line inside a View I'm struggling trying to figure it out why is not animating from the top of the View1 to the bottom of the View1. When animating it start to animate from the bottom and I don't know why. This is my layout. .... ... So I want this scannerBar start animating from the top of the view_reader and start again when it arrives to the bottom of the view_reader. And I did my animation as follows : val vto: ViewTreeObserver = binding.scannerBar.viewTreeObserver val listener =...

Error Trying to create App following guide on android studio 4.1 with Kotlin following the guide: "Build your first app" using Kotlin: https://developer.android.com/training/basics/firstapp/starting-activity#BuildIntent Android Studio 4.1 until "Build a simple user interface" all works fine. then after finishing "start another activity" appears the error "Unresolved reference: editText" that error appears first time at "Build an intent" error...

Decode Data Received from Bluetooth device in Android Kotlin? I have configured Bluetooth Device that send data to Android App. But I am receiving data in unreadable format. Data I received from Bluetooth is below format. ��� �� ��� Here is my android code private val mmInStream: InputStream? private val mmOutStream: OutputStream? init { var tmpIn: InputStream? = null var tmpOut: OutputStream? = null // Get the input and output streams, using temp objects because // member streams are...

ANDROID VIBRATION DETECTOR Hello everyOne im new Here. So im trying to create a digitalSling Shoot using android app. My problem is i want to trigger activity when a shake is detected. Meaning A shot was made. Now after passing through many libraries i found that most of them uses accelerometer and specifical x axis. Now i want to use only Z axis to detect a pattern of the shock/shake. After trying to manual code the z accelerometer i found that it was terrible even if u bend it. It detects as slighShot. So guys help...

Android: MaterialAutoCompleteTextView only shows Item after deleting one character I am trying to create a AutocompleteTextView which suggests some places after starting to type its name (so if you start typing "New Y", the AutoCompleteTextView should show "New York" etc..) This kinda works, but here is my problem: When I type New York, it does not show the City in the first place BUT when I erase "y" and then type it again, it finally shows it. I've already debugged my ArrayAdapter and made sure, that New York is one of the suggested Items in the Array and it was from the...

How to resolve RecyclerView list update issue? I observe changes to a list of data using LiveData. I implement the ListAdapter class for the RecyclerView adapter and implement DiffUtil.ItemCallback to reduce the number of view updates. Minimal reproducible example: Model: data class Item( val id: String, var value: String ) ViewModel: val items = MutableLiveData() Fragment/Activity: viewMode.items.observe(viewLifecycleOwner) { items -> adapter.submitList(items) } ListItemAdapter: class ItemAdapter() :...

Deserialize a json to find which object maps Android Kotlin In my application i use Sockets.The income messages from socket are jsons and i want to map each json to each according object. So i tried to do something like try { val thing = Gson().fromJson(mJson, ObjectOne::class.java) // This json is ObjectOne type of object. Do something with it catch(e: JsonSyntaxException) { // This json is not ObjectOne object. Proceed to check another object } However i noticed that no exception happens and thing is an ObjectOne object with null fields....

Dobut about injecting Fragment into Activity using dagger2 I recently started learning Dagger2 by reading many blogs, but after reading many of them I still don't understand why in order to inject a Fragment into and Activity it's necessary to call instantiate the Fragment from the Activity if it's supposed to be injected. To provide an example I'll use this project For example, having this <a...

How to keep the Dialog box open on a Activity while the activity is being refreshed (Changing theme of the app)? I have a Settings.kt activity which have a theme changing feature for my app. On clicking the theme option a themeDialog box pops up on the screen and with the switch, theme can be changed as shown in the pic below. And now to reflect those changes on the Settings.kt activity as well as on the themeDialog I am refreshing the Settings.kt activity with the help of intent and as a result of that theme is changing properly but the themeDialog is closing simultaneously as the activity is...

Android progressbar set different background drawable on progress 0 and progress 100 I am trying to implement a circular download progress bar which can show different drawable when the progress is 0(download not started) when the progress is > 0 && < 100 (download in progress) when the progress is 100(download complete) I was able to implement the showing of circular progress bar when the progress is > 0 && < 100 with the below code circle.xml...

Observing LiveData with DataBinding after ViewStub inflation I am trying to delay inflating some views in a large fragment to avoid a freeze. in fragment.xml : fragment_stub_content.xml: Function toggleDetails in vm toggles boolean livedata canShowDetails. I can see that this function is successfully called by a log. But canShowDetails (A MutableLiveData) does not change despite being observed in a view. A trivial code would be fragment_stub?.inflate()...

Как проверить ли включен режим энергосбережения в Андроиде? [closed] Мне нужно уведомлять пользователя, когда он включает режим энергосбережения, что это может негативно повлиять на работу приложения. Я попробовала слушать изменения и вызывать этот метод: val powerManager = getSystemService(Context.POWER_SERVICE) as PowerManager if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { if (powerManager.isPowerSaveMode) { //включен режим энергосбережения } else if (!powerManager.isPowerSaveMode) {...

Kotlin Alarm Manager Notification Sound and vibes I create app with alarm manager who get notification on constant time. I have problem with sound and vibes in my app. How can I replace the DataPicker so that I don't have to select a date, but repeat it every day? MainActivity class MainActivity : AppCompatActivity(), TimePickerDialog.OnTimeSetListener, DatePickerDialog.OnDateSetListener { private var minute = 0 private var hour = 0 private var dayOfMonth = 0 private var month = 0 private var year = 0 private lateinit var alarmManager:...

Type inference failed. Expected type mismatch The code below shows the error. Type inference failed. Expected type mismatch required: Response! found:Response! `when`( mockIOnboardingService.validateCustomerIdentity(customerType.toLowerCase(), ValidateCustomerRequest(customerId, documentType, "243546", tyc))) .thenReturn(Response.success(BaseResponse(payload = RetriveUserInfoResponse("+5689765432")))) //--> Here the error This is the validateCustomerIdentity method @POST(ApiConstants.bffOnboardingPath +...

Connect to local server via android emulator I have an Asp.Net Core API project that works well on local server and I want to connect to a local server via Android Emulator, but I have an error: retrofit2.adapter.rxjava2.HttpException: HTTP 307 temporary redirect Here is the code: object RetrofitClient { private var retrofit: Retrofit? = null fun getClient(baseUrl: String): Retrofit { if (retrofit == null) { retrofit = Retrofit.Builder() .baseUrl(baseUrl)...

List all application supported with multi-window I would like to list all application supported with multi-window. I have a function that list all installed app, but I cannot figure out how to check if an app supports multi-window. Can anyone help me, pls? fun getApplicationsInfo(context: Context): MutableList { val apps: MutableList = ArrayList() val intent = Intent(Intent.ACTION_MAIN, null) intent.addCategory(Intent.CATEGORY_LAUNCHER) val pm: PackageManager = context.getPackageManager()...

How to emit data using Kotlin Flow? I'm starting to learn Kotlin Flow and Coroutines but I do not know how to make the code below works. What am I doing wrong? interface MessagesListener { fun onNewMessageReceived(message: String) } fun messages(): Flow = flow { val messagesListener = object : MessagesListener { override fun onNewMessageReceived(message: String) { // The line below generates the error 'Suspension functions can be called only within coroutine body' emit(message)...

How to parse data from response in Kotlin? I am new to Kotlin and using Tweedle Library "https://github.com/tyczj/Tweedle" for getting data from twitter in my android app. I am able to get a response with on click function but I just want to extract "text" Info from it. val query = "\"Might buy\"from:elonmusk" val map = HashMap() Log.d("query", "TwitterRecent: " + query) GlobalScope.launch { val tweetrecent = _tweetLookup.getRecentTweets(token, query, map).collect { it -> when (it) {...

Creation of "table" with products in Android with Kotlin I need to create a list of elemets that are composed by a name (TextView) and a editable box (EditView) where I can insert the number of pieces. So I need to use a "reusable" view for each element. Once that I have this list, after clicked on a button, I need to retrieve all the element and the number of pieces for each element. Initially I used the RecycleView but when I try to retrieve all the element, I can access only those on the screen. So, what can I use to have the possibility to loop...

When to use property delegation and when to use property getter in Kotlin? With release of Kotlin 1.4, we can do delegation of properties as: val delegatedProperty: Int by anotherObj::intProperty But where are they useful? As when should somebody use them over the old-style getter and setter definitions? val delegatedProperty: Int get() = anotherObj.intProperty And even the this old-style getter/setter seems to have less...

Kotlin : update one column with viewmodel in Room I using room database on kotlin. and I want to update or change just one row and specify column of that rows. i write query in my DAO but I don't know how must be used. I have one repository and one viewmodel that I used. read all data work fine. i want to when user clicked on my button, value of fav column is changed and saved in my room database. how must be changed Dao, repository and viewmodel in my project for this? thank u @Entity data class Detail_Entity( @NonNull val id: Int,...

What is causing WebClient to return null from a rest call? I have a basic Kotlin Spring app, and I want to make a rest call to return and print the json. I have the below code, but every time I make a call, it returns null. This happens to other rest calls as well. Do I need to make the call in a different way? fun main(args: Array) { val app = runApplication(*args) val client = WebClient.create("https://api.kanye.rest") val type = object : ParameterizedTypeReference() {} val result : Flux = client.get() .retrieve()...

kotlin object class not found when proguard is enabled My application works well when proguard is disabled, but once enable it breaks the functionality. I have a class called CachecManager which is not accessible once proguard is enabled. Here is my class object CacheManger { fun setData(data: String) { val yourFilePath: String = BaseClass.appContext.filesDir.toString() + "/" + USER_DATA val yourFile = File(yourFilePath) val fileOutputStream = FileOutputStream(yourFile)...

kotlin - Problem with my if statement and operator This is my goal : user click on minus button the amount decrease by one and there is a if statement to not allow the amount go lower than 0 . This is my Code : var number = 0 view.text_amount.visibility = View.GONE view.plus_btn.setOnClickListener { if (number == 5) { Toast.makeText( requireContext(), "Limit in order", Toast.LENGTH_SHORT ).show() } else {...

codeing to retrieve questions one after another from Firebase into textbox kotlin I am new to firebase realtime data retrival. I am able to pass data to firebase using following code, I know link is working between app and firebase. var database= FirebaseDatabase.getInstance().reference database.setValue("HB test 1312") Below is where user selects button for shift check. i.e if they select AM Shift they will below screen <a href=""...

Android SearchView on ActionBar, detect click on Search Kotlin When I click on the search, the code is triggered, but the search itself does not open, if the code below is removed, then the search works, how to get around this problem? val searchButton : View = findViewById(R.id.app_bar_search) searchButton.setOnClickListener{ val image : ImageView = findViewById(R.id.imageView27) image.setVisibility(VISIBLE) }

Copy all runtime dependency jars to directory I'm trying to copy the jars of my project from one machine to another. The problem is that with my current build.gradle script, apparently some jar is missing to actually run the application. build.gradle plugins { id 'org.jetbrains.kotlin.jvm' version '1.3.72' id 'application' } group 'rover' version '1.0-SNAPSHOT' repositories { mavenCentral() } mainClassName = "MainKt" dependencies { testImplementation group: 'junit', name: 'junit', version: '4.12' compile...

emulator was is killed I am new to android studio and trying to run an emulator but every time I run it says that the emulator was killed and I can not know what to do and every body says about haxm but I already installed it and nothing happened and I do not know what to do with this is the problem Error while waiting for device: The emulator process for AVD Pixel_XL_API_30 was killed.