failed to find Build Tools revision 24.0.2 I download tutorial codes from github, and I unzip it and copy paste it to where my android studio projects are. I update to SDK 24 to open this project but as I open this courtcounter project, Android Studio gives me failed to find Build Tools revision 24.0.2 Pls write a bit more words for clear instructions in steps of what do I do since I am new to android studio. A lot of time I don't understand the terms you...

Create Fragment with Class Object We can do that: val fragment = SomeFragment() val args = Bundle() args.putString("Key_Value", "String_Value") fragment.arguments = args And we can take it from Fragment like this: arguments.getString("String_key","Default Value") My question is can we pass a class object as parameter? val some_object = SomeClass() args.put("Key_Value", some_object )

Retrofit can't download some files I use this code for download file by retrofit: @Streaming @GET fun download(@Url url: String): Single? . ApiProvider.download("") ?.subscribeOn(Schedulers.io()) ?.observeOn(AndroidSchedulers.mainThread()) ?.subscribe({ writeToDisk(it, "test", "jpg", object : DownloadListener { override fun onComplete() {} override fun onError() {} })...

Not able to hide collapsing toolbar view in Android When user scroll down then only search_layout has to me hide and when user returns to the 1st position of recycleview then show search_layout I try below code but not get success, please help me and tell me which mistake I did fragment_product.xml

How to make static methods in Kotlin If i use Java i make something like this: public class App extends Application { private static AppComponent appComponent; @Override public void onCreate() { super.onCreate(); initDagger(); } private void initDagger(){ appComponent = DaggerAppComponent.builder() .appModule(new AppModule(this)) .databaseModule(new DatabaseModule(this)) .networkModule(new NetworkModule()) .build();...

Material Chips: java.lang.IndexOutOfBoundsException when checked any of the chips I have a with some chips in my AddItemFragment. I am creating these chips programmatically. To be more precise here is my code to create them: mViewModel.categories.observe(viewLifecycleOwner) { resource -> handleResource( resource = resource, successFunc = { setCategoryChips(resource.data!!) },...

Can I read application properties in a Micronauts @Singleton class with @EventListener? I have a @Singleton class with a method annotated with @EventListener in my Micronaut project: @Singleton class Bot { @Inject private val environment: Environment? = null @EventListener fun initialize(event: ServerStartupEvent) { val key = environment?.getProperty("discord.api.key", String::class.java)?.get().orEmpty() // code that is using the key variable } } The key is in application.yml file: discord: api: key: MY_API_KEY // key is...

Using <FragmentContainerView> instaed of <fragment> causes the app to crash on using BottomNav and jetpack navigation [duplicate] I am creating an app with a BottomNavigationView. I am using JetpackNavigation and kotlin. I have set up my XML as But I'm getting a Replace the tag with FragmentContainerView. suggestion message from the Android Studio suggestions The app breaks when using FragmentContainerView but runs perfectly on using fragment The error I'm getting is Unable to start activity ComponentInfo{com.example.reportbusterclone/com.example.reportbusterclone.view.MainActivity}:...

Spring Webflux Websocket session management I've been trying to do a reactive Websocket using Spring Webflux. But I can't quite figure out how to do a better connection management when working with Reactive Spring. Using Spring Boot without the Reactive part I would've done something along the lines of: @Component class SocketHandler : TextWebSocketHandler() { var sessions: MutableList = CopyOnWriteArrayList() fun afterConnectionEstablished(session: WebSocketSession) { sessions.add(session) } fun...

Room + Kotlin Flow not emitting result i'm trying to fetch some data from api, and them store on room database, so the main data source is roomDatabase. my repository code looks like: suspend fun fetchData(): Flow { val shouldRequestData = dao.getFoo().isEmpty() return if (shouldRequestData) { getFoo() } else getLocalFoo() } override suspend fun getFoo(): Flow { return ....... request done normally... inserting normally on database (and...

Same fragment creating on sliding in ViewPager2 I have 2 fragments that I want to show in my viewpager2 but only one shows in the view pager in both the tabs even though I am passing two fragments in my adapter although titles that I set are visible correctly. Currently I am using viewpager2 with collapsing toolbar ParentFragment class MessagesFragment : Fragment() { private lateinit var binding: FragmentMessagesBinding private lateinit var adapter:ViewPager2Adapter override fun onCreateView(inflater: LayoutInflater,...

How to call a Java method signature with single parameter and lambda in Kotlin? public final Mono onErrorResume(Class type, Function

`onDetach` not working inside viewpager2 fragment I was wondering if it was possible to detach view pager 2 fragment manually because I wasn't able to call onDetach which result some crashes[ since it can run on the back grond] on viewPagers fragment //ViewPagerPage1.kt override fun onDetach(){ super.onDetach() Log.d("TAG", "VP fragment Detached")//doesn't show up I tried things like //Main.kt override fun onDetach(){ super.onDetach() //Parent fragement where viewPager impliment viewPager.removeAllViews()//no luck } or...

save fragment state in a bottom navigation bar I have an activity, which basically is a navigation bottom bar containing fragments. If the the user is logged in, the bottom navigation shows 4 fragments: market, favorite, upload and profile. If the user is a guest, there are two fragments: market and login. Before, every time someone swapped from a fragment to another, it was generated again. However, I wanted to conserve the state of the fragment, so if someone applied a filter in the market and came back, it had to keep the filter...

Kotlin I used timer.cancel() on override onBackPressed and now it crashes As the title says, I used override onBackPressed to cancel my timer. However the app would crash frequently private lateinit var timer: CountDownTimer override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_characters) supportActionBar!!.setDisplayHomeAsUpEnabled(true) setActionBar() startTimer() } private fun startTimer(){ timer = object : CountDownTimer(secondsRemaining * 1000, 1000){...

is it possible to change the default direction of a ViewPager Android? It is possible to override the action of switching screens of a ViewPager that by default drags to the sides (from left to right and vice versa) to pass the screen with movements from top to bottom and from bottom to top?

Weird spacing and behaviour with widget ListView I have never worked with Widgets in Android so I'm pretty sure I'm doing a ton of dumb stuff. Nonetheless I can't figure out why this shouldn't work. I have a WidgetConfigureActivity which allows the user to pick some data to be displayed in that specific widget. Inside the widget I need a ListView which I handle through a RemoteViewsService.RemoteViewsFactory class extension. I know this adapter is a mess, but I can't see why it shouldn't work. class PairingWidgetService :...

Button Displays offscreen when it displays sometimes can someone explain to me why the buttons display offscreen sometimes when they move. My image size is 256 x 256 px and I'm using displaymetrics to get the height and width of the screen. then using a the random function to move the button but it seems to show up less often on the left side of the screen and now can appear offscreen val displaymetrics = DisplayMetrics() windowManager.defaultDisplay.getMetrics(displaymetrics) val width = displaymetrics.widthPixels // 1080 val...

Moshi Retrofit Request I'm doing a POST request and I'm using @JsonClass(generateAdapter = true) And the request body is as follow: { "request": "some data", "data": {} } When creating my data class, how could I declare the empty object "data" = {} My data class is as follow: @JsonClass(generateAdapter = true) data class Request(val request: String, val data: ?) But, how could I create the empty body?

How to check an object not null with empty data in Kotlin I have an EObject variable in my code who is received by parameter. The variable is not null, but it has not information and when I try to access to the information(which is null) I have a null exception. Basically, this is my method: fun getContainerConnectionOwner(eContainer:EObject):EObject{ if(eContainer !is ConnectionOwner && eContainer?.eContainer() != null ){ getContainerConnectionOwner(eContainer.eContainer()) } return eContainer } The eContainer variable has a...

Column with .scrollable() modifier breaks map vertical scroll The problem I'm trying to implement simple map view inside scrollable column. The problem is that I can't scroll map vertically, as scroll event is captured by column and instead of map, whole column is scrolling. Is there any way to disable column scrolling on map element? I thought about using .nestedScroll() modifier, but I can't find a way to make it work as desired. Code LocationInput (child) // Not important in context of question, but I left it so the code is complete @Composable...

How do I generate a unique key for each message in Realtime Database? I'm working on a simple group chat app. The realtime chatting will be done through Firebase Realtime Database and then after a while the messages will be moved to Firestore. This is the structure I'm thinking of for RTDB. The groupID will be the first node after the root DB node. The next child under the groupID node will be the message that each user sends. This node will contain the createdate, the actual message, the user's uid, and the user's username. However, I'm not sure how to...

How to or best way to write to a file in kotlin src folder android Trying to write to a text file inside my src folder in android studio. keep getting errors like this no matter what I try. Keeps saying the file is read only. One website said to add , which did not do anything. val filename = "AlarmsText.txt" //one of attempted methods to write to file results in read only err File(filename).appendText("zzzzzzzz") E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.alarmclock, PID: 26076 java.lang.RuntimeException:...

Android app is working perfectly on phone but showing exception on tablet This is the link of the code, I used from GitHub, https://github.com/PunchThrough/ble-starter-android. The code is used to connect to devices via BLE. I found that when I run code on phone, it works perfectly, but when I tried to run it on Lenovo tablets, it shows me the following error. Could you please suggest me any solutions? 2021-05-11 132022.073 24893-24893/? I/arterappandroi: Late-enabling...

Setting life cycle owner in android with binding When to use which one amongst below while setting up life cycle owner in fragment or what is the difference between these two ?? binding.lifecycleOwner = this and binding.setLifecycleOwner(this)

Problem implementing openUrl function in recycler view adapter I wanted to openUrl when someone clicked on the title in the recyclerview, but it showing an error for startActivity(intent). override fun onBindViewHolder(holder: ItemHolder, position: Int) { val itemModel: ItemModel = arrayList[position] holder.title.text = itemModel.title holder.source.text = itemModel.source val url = itemModel.url holder.title.setOnClickListener { Toast.makeText(context, itemModel.title, Toast.LENGTH_LONG).show()...

What is `encode()` function detected in JaCoCo coverage report (for Kolin)? Recently I upgrade my gradle from 6.5.1 to 7.0 i.e. distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-all.zip After the upgrade, I notice my test coverage dropped. After investigation, I found out that in Gradle 6.5.1, my JaCoCo test coverage report shows some of my class has an encode() function, but it no longer exists in Gradle 7.0. I dig out the simplest example below. The code is as below In...

Rotate view in all items when RecyclerView scroll I will be grateful for your help. Each item of the RecyclerView has an image, when scrolling the RecyclerView, the images in all items should rotate, when scrolling to the right clockwise and vice versa. How can I do it. Here is my code. How can I get the code in block if and else to be called the same number of times. categoriesRecycler.addOnScrollListener(object : RecyclerView.OnScrollListener()...

Save transient field in Room Database Consider the following data model where status is provided by the API at the top level and message is provided at a nested level (this isn't really the case but just to illustrate the problem): data class ( @Json(name = "status") val status: Int, @Transient val message: String ) Now, suppose I want to save this data model into my database. I'd change the model like so: data class ( @ColumnInfo(name = "status") @Json(name = "status") val status: Int,...

How to implement my drawerlayout in fragment kotlin? it can use only when using AppCompatActivity Here my full coding kotlin, it will get error when i want to implement my drawer layout when using fragment. but it will get okay when im using AppCompatActivity, but i cannot using AppCompatActivity cause there are coding need to use fragment. Please help me :( <a...