Why Hilt and Dagger need to inject Activity and Fragment? I have been using Dagger for a while and now I'm starting to migrate to Hilt, but I don't understand the benefits of injecting Activity and Fragment. In Dagger, it is AndroidInjection.inject(this) and something like HasActivityInjector Sorry if it was a stupid question.

Unable to fetch JSON response using Retrofit and Coroutines in Android I am trying to fetch JSON response from server using retrofit2 and coroutines but I am getting below error. java.lang.IllegalArgumentException: No Retrofit annotation found. (parameter #3) Below is my JSON response: { "msg": "Digi" } Here is my code: RetrofitClient.kt object RetrofitClient{ var BASE_URL:String = "http://myurl.com/" val getClient:ApiService get(){ val gson = GsonBuilder().setLenient().create() val interceptor = HttpLoggingInterceptor()...

Get error when I declare progressbar id in kotlin I want to create a horizontal progress bar in my splash screen activity but when I write kotlin code to animate it, the id of the progressbar shows in red. xml kt class SplashScreen : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.splash_screen) progressBar.max = 1000 val...

How to get thumb image given a File instance in Kotlin? How to get thumb image given a File instance in Kotlin? Is it possible to get a tumbnail image from a File instance when the File is a media file?

EXTRA_SUBJECT is showing in native message app in Samsung devices I have to send invites from my app, in all devices the following code is working fine except Samsung, in Samsung devices EXTRA_SUBJECT is also appending when the user selects a native messaging app that I do not want. Intent intent = new Intent(android.content.Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(android.content.Intent.EXTRA_SUBJECT, mContext.getResources().getString(R.string.subject)); intent.putExtra(android.content.Intent.EXTRA_TEXT,...

Room Database Id = null I am getting error while using ROOM database for my apps; "error: Cannot find getter for field.private final java.lang.String id = null;" My data class like data class CategoryItems( @PrimaryKey(autoGenerate = true) val id: Int) App not working with id, idCategory, idSubCategory etc variable names. I have been trying to figure this problem out recently. I find a solution ,just replace id to CategoryId. Maybe it helps someone.. data class CategoryItems(...

Interrupt HttpURLConnection by kotlin coroutines I'm trying to use HttpURLConnection with Kotlin coroutines like this var downloadJob: Job? = null fun triggerDownload() { job = downloadFile() } override fun onBackPressed() { downloadJob.cancel() super.onBackPressed() } fun downloadFile() = launch { withContext(Dispatchers.IO) { var connnection: HttpURLConnection? = null try { connnection = url.openConnection() as HttpURLConnection connnection.connect() //do the work...

error: cannot find symbol @TypeConverters(Converters_kotlin.class) I was developing an App where I have the intention to keep data into a RoomDatabase. I get the erro on the title when I try to sart my App. I don't know if it for using a kotlin class in combination with other java class. My kotlin file is the Converters.class with I use to keep Image into the database. Converters.kotlin class Converters_kotlin { @TypeConverter fun fromBitmap(bitmap:Bitmap): ByteArray{ val outputStream = ByteArrayOutputStream()...

How to store a PBE generated symmetric key inside AndroidKeyStore? So, I have a PBE inside my Android app. I have also generated a symmetric key using the user provided password. Now I want to store it safely inside AndroidKeyStore AndroidKeyStore has a function for this: setKeyEntry (String alias, Key key, char[] password, Certificate[] chain) But the thing is that I get an error message when using it: java.security.KeyStoreException: Protection parameters must be specified when importing a symmetric key I checked the...

How to use Firestore databse : addSnapshotListener using await() in Kotlin? I have a DAO class where I have fetchHubList method which fetches a collection of documents from cloud Firestore asynchronously using await(). This implementation used get() method which I got to know later on does not fetch real time updates. On trying to implement the code similarly using onSnapshotListener gives an error (which was quite expected to be honest, because get() and this methods return quite different things). Does anyone have any idea how to implement this? How the code is...

Using Delegates.observable with StateFlow in Kotlin(Android) I have a class which monitors the network state. I'm using Flow to be able to collect the network state updates. However, I also need to leave an option to use manual listeners that programmers can "hook" onto to be able to receive the network changes. My code is simple : private val networkTypeState = MutableStateFlow(NetworkState.Unknown) val networkTypeAsFlow: StateFlow by notifyDelegate(networkTypeState) private fun notifyDelegate(init: T) = Delegates.observable(init) { prop, _,...

kotlin: After inserting data list does not refresh with new data sometimes I am running tthe following code: doAsync{ val result = URL("https://www.*.com/ajax/app/send.php?email="+email+"&email_own="+email_own+"&mes="+editTextTextMultiLine.getText().toString()).readText() uiThread { toast(result) } } Now i fetch the data and my recycleview does not refresh with the new data (sometimes it does but not always): doAsync{ val result =...

Shared Preferences not working when trying to save EditText so I wrote some code to save an editText in an activity. However, when I go to test the app, the text does not save. I've pasted my code below. Thanks. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_start) val appSettingPrefs : SharedPreferences = getSharedPreferences("AppSettingPrefs", 0) val sharedPrefsEdit: SharedPreferences.Editor = appSettingPrefs.edit() sharedPrefsEdit.putString("Goal...

How to add top shadow on rectangle drawable I have a rectangle drawable that needs to display a top shadow only, I can't use elevation because it will place shadow in all the component, instead I just need to place a drop shadow in top of this drawable What I need What I currently have This draws the borders to the view, but there is no top shadow on it, instead is just a plain white image

Reference implementing class from interface definition Given an interface I: interface I { public abstract T doSomthing(T other); } where any class C which implements the interface I will always use itself (C) as the type parameter: class MyClass implements I { @Override public MyClass doSomthing(MyClass other) { return null; } } Is there a way to accomplish this without explicitly passing the class C as the parameter every time a new class implements the interface? In other words is it possible, in an interface, to...

Render Problem in Main Activity file - Android Studio Render problem occurs in Main activity. This issue does not affect the usability of the application but makes it very difficult to make adjustments to the layouts contained within the main activity. There is not more info is available for this issue, I have tried following the stack trace with no luck. Here is the full Stack Trace Stack Trace java.lang.NullPointerException at android.view.ViewGroup.brokenDispatchApplyWindowInsets(ViewGroup.java:7200) at...

Jetpack Compose: When using Modifier.selectable how do you prevent a layout composable from being selectable while scrolling? In Jetpack Compose there is a Modifier extension called selectable. Configure component to be selectable, usually as a part of a mutually exclusive group, where only one item can be selected at any point in time. I'm using this for a mutually exclusive radio group inside a scrollable list. In my case a LazyColumn. This works fine, clicking on the selectable areas lights them up and results in detected clicks. However I noticed that the area also lights up while "touching" these areas while...

Kotlin/Android : Cannot pass LiveData to customView with Canvas I've instanciated a Graph object in ViewModel and Im trying to pass it to the custom canvas view I made but I keep getting the messages that "Attempt to invoke virtual method ... on a null object reference" Bellow I post my code and error log. Custom Canvas View Fragment ViewModel <a href="" rel="nofollow...

how can I No Rewrite items when load more in recyclerview kotlin? Community. I face a problem that a level of logic finds me locked When I scroll brings new data, but when you enter the adapter, the items are rewritten instead of joining the ones that are already there. in my fragment: private fun loadMoreProductList(root: View) { val viewModel = ViewModelProvider(this).get(HomeViewModel::class.java) viewModel.setCurrentPage().observe( viewLifecycleOwner, { if (it != null) {...

Android(Kotlin) app run perfect on Android 6 but make devices with Android 10 crashes I found this really bizarre. I built this app using firebase on Kotlin. The app runs well on both Android 6 and 10. But after some time like 1 - 2 hours. The devices with Android 10 will get stuck on black screen and all buttons will be unresponsive. To recover, it need to be hard reset then it will all work again. Connected to Android studio show no error on log. This is my manifest file.

Android Unit Test to add / set a Favorite movie using repository and kotlin-coroutine I am working on an app that uses themoviedb API. This app can see all of the "on the air movies" on The Movie DB and you can save one of the movie or more to the internal database as a favorite movie (using room). I am using repository and right now i am trying to write a unit test that verify setFavoriteMovie test case on MovieRepositoryTest file. So here's my code on Test Package MovieRepositoryTest import androidx.arch.core.executor.testing.InstantTaskExecutorRule import...

XML preview color is different from the actual app anddroid I've created a project and added 2 buttons in activity_main.xml but they have different colors in layout preview and the actual app. How come? There are 2 files under themes: themes.xml: @color/purple_500 @color/purple_700 @color/white @color/teal_200 @color/teal_700 @color/black ?attr/colorPrimaryVariant and...

Can somebody explain this lambda? I'm implementing a date picker fragment and I have the following code: DatePickerFragment: class DatePickerFragment(val listener: (day: Int, month: Int, year: Int) -> Unit) : DialogFragment(), DatePickerDialog.OnDateSetListener { override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) { listener(dayOfMonth, month, year) } override fun onCreateDialog(savedInstanceState: Bundle?): Dialog { val c = Calendar.getInstance() val...

What to use to get other users distance from you like you can in tinder tinder I'm new in android development and I've been searching the web for answers to my specific question I'm trying to build a app where i want to search within a certain distance from my current location and would like everyone that is in that distance to show up Basically the same feature you get in the tinder app where you set a location and everyone that is within that distance shows up I'm doing this with android studio and using Kotlin I haven't written any code with this part because I'm...

ClassCastException when upgrading SDK from 28 to 29 I have this bizarre problem with this function. When I target SDK 28, no problem and no crash happen. Here's the working code with target SDK 28. override fun getChildList(): List { val itemsWithSubCats: MutableList = ArrayList(items) if (subCategories?.isNotEmpty() == true) { itemsWithSubCats.add(ArrayList(subCategories)) } return itemsWithSubCats.toList() as List } I've uploaded a release build to Playstore and I got an upgrade SDK problem....

OneSignal Data Tags is not woking in Android production release OneSignal send data tags is not working in android production release , working perfectly in debug version. communicationViewModel.getSelectedCountry()?.let { val json=JSONObject() json.put("country",GlobalFunctions.getCountryCodeCaps(it.countryID.toString(),this)) communicationViewModel.getLoggedInUser()?.let { userDetails-> json.put("email",userDetails.email) } OneSignal.sendTags(json) } In OneSignal control panel i could find all subscribed...

JSONArray into Kotling Array/List and Setting value in spinner I am performing a HTTP request from an API that gives me a JSON Array, I have been able to parse it but I am not able to convert it into a list or array in order to set it within the spinner. Here is what I have tried: HTTP CALL: private fun initiate() { var product = 1 val httpAsync = "https://link_here" .httpGet() .responseString { request, response, result -> when (result) { is Result.Failure -> {...

How to use Array List present in data Class in spinner using KOTLIN package com.examples.android.Fragments import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import android.widget.AdapterView import android.widget.ArrayAdapter import android.widget.Spinner import android.widget.Toast import com.examples.android.R import com.examples.android.utilities.ConstantsNames import kotlinx.android.synthetic.main.fragment_Name.* class Name_Fragment : Fragment()...

Espresso - checking recyclerview position for specific image I'm having a hard time figuring out how to test whether or not a certain image is being show on a position in a recyclerview using espresso. I have a list of people, and when one of them is selected, I'm showing a selected indicator around his image in the recyclerview. So I want to check that, for instance, position 0 has this indicator showing. What I'm trying is this: fun test(position: Int, @DrawableRes res: Int): ViewInteraction { return...

Android Studio search for occurrences in all projects (including closed ones) In the process of learning, I want to find pieces of code that I wrote in other projects for reuse in the current project. How can I find a line in all projects of the working directory (where all my projects are located) even if these projects are not currently open from Android Studio. I could not find such a feature in the studio itself and in plugins