Develop Reference

ProgressBar not showing and observing in MVVM pattern

I am trying to observe a progressBar and everything seems ok to me but its not working..
when it gets to the viewmodel its getting null value..
This is the repository:
val isLoadingProgressBarMutableLiveData = MutableLiveData<Boolean>()
fun getEmployeeListFromAPI(): MutableLiveData<List<Employee>> {
isLoadingProgressBarMutableLiveData.value = true
val apiRequest: APICallRequest = APIRequest.retrofitCallGetList
apiRequest.callEmployeeList().enqueue(object : Callback<EmployeesListResult?> {
override fun onResponse(
call: Call<EmployeesListResult?>,
response: Response<EmployeesListResult?>
) {
Log.e("onResponse1", "${isLoadingProgressBarMutableLiveData.value}")
if (response.isSuccessful) {
isLoadingProgressBarMutableLiveData.value = false
mutableListLiveData.value = response.body()?.getEmployeesListResult
Log.e("onResponse2", "${isLoadingProgressBarMutableLiveData.value}")
Log.e("onResponse", "Success!")
Log.e("Response:", "${response.body()}")
}
}
override fun onFailure(call: Call<EmployeesListResult?>, t: Throwable) {
Log.e("onFailure", "Failed getting list: ${t.message}")
isLoadingProgressBarMutableLiveData.value = false
}
})
return mutableListLiveData
}
fun getLoadingState() : MutableLiveData<Boolean>{
return isLoadingProgressBarMutableLiveData
}
"onResponse1" = true
"onResponse2" = false
but when I move it to the ViewModel I get null ...
This is the ViewModel:
class MainViewModel : ViewModel() {
fun getEmployeeListFromRepo() : LiveData<List<Employee>>{
return MainRepository().getEmployeeListFromAPI()
}
fun showProgressBar(): LiveData<Boolean> {
Log.e("Progress","ddd ${MainRepository().getLoadingState().value}")
return MainRepository().getLoadingState()
}
}
"ProgressBar" = is null
And in the activity:
mainViewModel.showProgressBar().observe(this, object : Observer<Boolean?> {
override fun onChanged(isLoading: Boolean?) {
Log.e("isLoadingProgressBar:", "Loading is...: $isLoading")
if (isLoading == true){
progressBar.visibility = View.VISIBLE
}else{
progressBar.visibility = View.GONE
}
}
})

Buddy - every time you do MainRepository() you're creating a new repository and accessing that. You should have one repository you're working with.
class MainViewModel : ViewModel() {
private val repository = MainRespository() // ONE repo
fun getEmployeeListFromRepo() : LiveData<List<Employee>>{
return repository.getEmployeeListFromAPI() // Get the live data to the ONE repo instead of creating a new one
}
fun showProgressBar(): LiveData<Boolean> {
// Print and return the value from the ONE respository instead of creating
// TWO new ones in this method
Log.e("Progress","ddd ${respository.getLoadingState().value}")
return respository.getLoadingState()
}
}

StateFlow: Cancellation of Older Emitted State After Collecting

I m relatively new in kotlin flows and I m creating the Login Module using Flows in android. I have been stuck from past few days in flows as I m collecting it in ViewModels but I m facing problem when requesting with wrong Credentials its caching all the state. After entering the right credentials the user navigate to main Activity but the instance of the MainActivity is being created with every emitted State: Example(User Enter 3 wrong Credential and 1 Right Credential: 4 Instance of MainActivity Created). So, Is there any way that I can cancel the previous emit and only show the latest request. I m using the collectLatest as well but its not working too. Below is the code.
LoginActivity
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(mViewBinding.root)
loginListener()
}
override fun onStart() {
super.onStart()
initViews()
handleNetworkChanges()
}
private fun observeLogin() {
lifecycleScope.launchWhenCreated {
mViewModel.loginCredentials.collect { state ->
when(state){
is State.Loading -> {
showLoading()
}
is State.Success -> {
Timber.d("I m in Success" + state.data)
val intent = Intent(this#LoginActivity,MainActivity::class.java)
startActivity(intent)
closeLoading()
finish()
}
is State.Error -> {
val errorResponse = gson.fromJson(state.message,LoginResponse::class.java)
showToast(errorResponse.messages)
closeLoading()
}
}
}
}
}
private fun loginListener() {
mViewBinding.neumorphButtonSignIn.setOnClickListener {
observeLogin()
phoneNumber = mViewBinding.edtPhoneNumber.text.toString()
pin = mViewBinding.oldPIN.text.toString()
if (phoneNumber.isValidPhone()) {
sendLoginCredentials(phoneNumber ,pin)
}
else {
mViewBinding.edtPhoneNumber.snack("Please Enter valid phone number") {
action("ok") {
dismiss()
}
}
}
}
}
private fun sendLoginCredentials(phoneNumber: String , pin: String) = mViewModel.postLoginCredentials("03XXXX" , "1234")
LoginViewModel
#ExperimentalCoroutinesApi
#HiltViewModel
class LoginViewModel #Inject constructor(
private val loginRepository: LoginRepository,
) : ViewModel() {
private val _loginCredentials: MutableStateFlow<State<LoginResponse>> = MutableStateFlow(State.Empty())
val loginCredentials: StateFlow<State<LoginResponse>> get() = _loginCredentials
fun postLoginCredentials(phoneNumber: String, pin: String) {
Timber.d("postLoginCredentials: $phoneNumber + $pin")
_loginCredentials.value = State.loading()
viewModelScope.launch {
loginRepository.login(LoginRequest(phoneNumber,pin))
.map { response -> State.fromResource(response) }
.collect{state -> _loginCredentials.value = state }
}
}
}
LoginRepository
class LoginRepository #Inject constructor(
private val apiInterface: APIInterface
) {
fun login(loginRequest: LoginRequest): Flow<ResponseAPI<LoginResponse>> {
return object : NetworkBoundRepository<LoginRequest, LoginResponse>() {
override suspend fun fetchFromRemote(): Response<LoginResponse> = apiInterface.createLoginRequest(
loginRequest
)
}.asFlow()
}
NetworkBoundRepository
abstract class NetworkBoundRepository<RESULT, REQUEST> {
fun asFlow() = flow<ResponseAPI<REQUEST>> {
val apiResponse = fetchFromRemote()
val remotePosts = apiResponse.body()
if (apiResponse.isSuccessful && remotePosts != null) {
emit(ResponseAPI.Success(remotePosts))
} else {
// Something went wrong! Emit Error state.
emit(ResponseAPI.Failed(apiResponse.errorBody()!!.string()))
}
}.catch { e ->
e.printStackTrace()
emit(ResponseAPI.Failed("Network error! Can't get latest posts."))
}
#MainThread
protected abstract suspend fun fetchFromRemote(): Response<REQUEST>
}
Is there any way that I can create One Instance of MainAcitivity while ignoring the older emitted Responses? Any Operator which can work. Any help in this regard is highly appreciated. Thanks.

Actually, I was calling the observeLogin() from the login click Listener which was creating this mess in my project when I move this to onCreate(). Everything works the way as intended. So, posting this for newbie that won't stuck into this.

UI is not updating while viewModel is updated in android kotlin

I am following the MVVM pattern Activity-->ViewModel ---> Repository . Repository is calling api and updated the LiveData. The value is of LiveData is also updated in ViewModel but its not reflecting on Activity. Please guide me where i am missing, Code is given below
Activity code:
class LoginWithEmailActivity : AppCompatActivity() {
private var loginViewModel: LoginViewModel? = null
private var binding: ActivityLoginWithEmailBinding? = null
private var btnLogin : Button? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
loginViewModel = ViewModelProviders.of(this).get(LoginViewModel::class.java)
binding = DataBindingUtil.setContentView(this#LoginWithEmailActivity, R.layout.activity_login_with_email)
binding!!.setLifecycleOwner(this)
binding!!.setLoginViewModel(loginViewModel)
btnLogin = findViewById(R.id.btn_login)
loginViewModel!!.servicesLiveData!!.observe(this, Observer<LoginDataModel?> { serviceSetterGetter ->
val msg = serviceSetterGetter.success
Toast.makeText(this#LoginWithEmailActivity, ""+msg, Toast.LENGTH_SHORT).show()
Log.v("///LOGIN SUCCESS////",""+msg);
})
btnLogin!!.setOnClickListener {
loginViewModel!!.getUser()
}
}
ViewModel.kt
class LoginViewModel : ViewModel() {
var servicesLiveData: MutableLiveData<LoginDataModel>? = MutableLiveData()
fun getUser() {
servicesLiveData = MainActivityRepository.getServicesApiCall()
}
}
Repository.kt
object MainActivityRepository {
val serviceSetterGetter = MutableLiveData<LoginDataModel>()
fun getServicesApiCall(): MutableLiveData<LoginDataModel> {
val params = JsonObject()
params.addProperty("email", "xyz#gmail.com")
val call: Call<LoginDataModel> = ApiClient.getClient.getPhotos(params)
call.enqueue(object : Callback<LoginDataModel> {
#RequiresApi(Build.VERSION_CODES.N)
override fun onResponse(call: Call<LoginDataModel>?, response: Response<LoginDataModel>?) {
if (response != null) {
val data = response.body()
serviceSetterGetter?.postValue(data);
}
}
override fun onFailure(call: Call<LoginDataModel>?, t: Throwable?) {
}
})
return serviceSetterGetter
}
}

You subscribe to the LiveData in onCreate
loginViewModel!!.servicesLiveData!!.observe(this, Observer<LoginDataModel?> { serviceSetterGetter ->
val msg = serviceSetterGetter.success
Toast.makeText(this#LoginWithEmailActivity, ""+msg, Toast.LENGTH_SHORT).show()
Log.v("///LOGIN SUCCESS////",""+msg);
})
but then getUser creates a new reference
fun getUser() {
servicesLiveData = MainActivityRepository.getServicesApiCall()
}
The one you are subscribed to is not the same as the getUser liveData.
If you want to keep what you have mostly the same you need to use MediatorLiveData
Or just do
getUser().observe(this, Observer<LoginDataModel?> { serviceSetterGetter ->
val msg = serviceSetterGetter.success
Toast.makeText(this#LoginWithEmailActivity, ""+msg, Toast.LENGTH_SHORT).show()
Log.v("///LOGIN SUCCESS////",""+msg);
})
fun getUser(): LiveData<LoginDataModel> {
return MainActivityRepository.getServicesApiCall()
}

Android: Firebase Object is null when using kotlin flow

My problem is, that when I try to get a document out of my database, that this document aka the object is always null. I only have this problem when I use Kotlin Coroutines to get the document out of my database. Using the standard approach with listeners do work.
EmailRepository
interface EmailRepository {
suspend fun getCalibratePrice(): Flow<EmailEntity?>
suspend fun getRepairPrice(): Flow<EmailEntity?>
}
EmailRepository Implementation
class EmailRepositoryImpl #Inject constructor(private val db: FirebaseFirestore) : EmailRepository {
fun hasInternet(): Boolean {
return true
}
// This works! When using flow to write a document, the document is written!
override fun sendEmail(email: Email)= flow {
emit(EmailStatus.loading())
if (hasInternet()) {
db.collection("emails").add(email).await()
emit(EmailStatus.success(Unit))
} else {
emit(EmailStatus.failed<Unit>("No Email connection"))
}
}.catch {
emit(EmailStatus.failed(it.message.toString()))
}.flowOn(Dispatchers.Main)
// This does not work! "EmailEntity" is always null. I checked the document path!
override suspend fun getCalibratePrice(): Flow<EmailEntity?> = flow {
val result = db.collection("emailprice").document("Kalibrieren").get().await()
emit(result.toObject<EmailEntity>())
}.catch {
}.flowOn(Dispatchers.Main)
// This does not work! "EmailEntity" is always null. I checked the document path!
override suspend fun getRepairPrice(): Flow<EmailEntity?> = flow {
val result = db.collection("emailprice").document("Reparieren").get().await()
emit(result.toObject<EmailEntity>())
}.catch {
}.flowOn(Dispatchers.Main)
}
Viewmodel where I get the data
init {
viewModelScope.launch {
withContext(Dispatchers.IO) {
if (subject.value != null){
when(subject.value) {
"Test" -> {
emailRepository.getCalibratePrice().collect {
emailEntity.value = it
}
}
"Toast" -> {
emailRepository.getRepairPrice().collect {
emailEntity.value = it
}
}
}
}
}
}
}
private val emailEntity = MutableLiveData<EmailEntity?>()
private val _subject = MutableLiveData<String>()
val subject: LiveData<String> get() = _subject
Fragment
#AndroidEntryPoint
class CalibrateRepairMessageFragment() : EmailFragment<FragmentCalibrateRepairMessageBinding>(
R.layout.fragment_calibrate_repair_message,
) {
// Get current toolbar Title and send it to the next fragment.
private val toolbarText: CharSequence by lazy { toolbar_title.text }
override val viewModel: EmailViewModel by navGraphViewModels(R.id.nav_send_email) { defaultViewModelProviderFactory }
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
// Here I set the data from the MutableLiveData "subject". I don't know how to do it better
viewModel.setSubject(toolbarText.toString())
}
}
One would say, that the Firebase rules are the problems here, but that should not be the case here, because the database is open and using the listener approach does work.
I get the subject.value from my CalibrateRepairMessageFragment. When I don't check if(subject.value != null) I get a NullPointerException from my init block.
I will use the emailEntitiy only in my viewModel and not outside it.
I appreciate every help, thank you.
EDIT
This is the new way I get the data. The object is still null! I've also added Timber.d messages in my suspend functions which also never get executed therefore flow never throws an error.. With this new approach I don't get a NullPointerException anymore
private val emailEntity = liveData {
when(subject.value) {
"Test" -> emailRepository.getCalibratePrice().collect {
emit(it)
}
"Toast" -> emailRepository.getRepairPrice().collect {
emit(it)
}
// Else block is never executed, therefore "subject.value" is either Test or toast and the logic works. Still error when using flow!
else -> EmailEntity("ERROR", 0F)
}
}
I check if the emailEntity is null or not with Timber.d("EmailEntity is ${emailEntity.value}") in one of my functions.
I then set the price with val price = MutableLiveData(emailEntity.value?.basePrice ?: 1000F) but because emailentity is null the price is always 1000
EDIT 2
I have now further researched the problem and made a big step forward. When observing the emailEntity from a fragment like CalibrateRepairMessageFragment the value is no longer null.
Furthermore, when observing emailEntity the value is also not null in viewModel, but only when it is observed in one fragment! So how can I observe emailEntity from my viewModel or get the value from my repository and use it in my viewmodel?

Okay, I have solved my problem, this is the final solution:
Status class
sealed class Status<out T> {
data class Success<out T>(val data: T) : Status<T>()
class Loading<T> : Status<T>()
data class Failure<out T>(val message: String?) : Status<T>()
companion object {
fun <T> success(data: T) = Success<T>(data)
fun <T> loading() = Loading<T>()
fun <T> failed(message: String?) = Failure<T>(message)
}
}
EmailRepository
interface EmailRepository {
fun sendEmail(email: Email): Flow<Status<Unit>>
suspend fun getCalibratePrice(): Flow<Status<CalibrateRepairPricing?>>
suspend fun getRepairPrice(): Flow<Status<CalibrateRepairPricing?>>
}
EmailRepositoryImpl
class EmailRepositoryImpl (private val db: FirebaseFirestore) : EmailRepository {
fun hasInternet(): Boolean {
return true
}
override fun sendEmail(email: Email)= flow {
Timber.d("Executed Send Email Repository")
emit(Status.loading())
if (hasInternet()) {
db.collection("emails").add(email).await()
emit(Status.success(Unit))
} else {
emit(Status.failed<Unit>("No Internet connection"))
}
}.catch {
emit(Status.failed(it.message.toString()))
}.flowOn(Dispatchers.Main)
// Sends status and object to viewModel
override suspend fun getCalibratePrice(): Flow<Status<CalibrateRepairPricing?>> = flow {
emit(Status.loading())
val entity = db.collection("emailprice").document("Kalibrieren").get().await().toObject<CalibrateRepairPricing>()
emit(Status.success(entity))
}.catch {
Timber.d("Error on getCalibrate Price")
emit(Status.failed(it.message.toString()))
}
// Sends status and object to viewModel
override suspend fun getRepairPrice(): Flow<Status<CalibrateRepairPricing?>> = flow {
emit(Status.loading())
val entity = db.collection("emailprice").document("Kalibrieren").get().await().toObject<CalibrateRepairPricing>()
emit(Status.success(entity))
}.catch {
Timber.d("Error on getRepairPrice")
emit(Status.failed(it.message.toString()))
}
}
ViewModel
private lateinit var calibrateRepairPrice: CalibrateRepairPricing
private val _calirateRepairPriceErrorState = MutableLiveData<Status<Unit>>()
val calibrateRepairPriceErrorState: LiveData<Status<Unit>> get() = _calirateRepairPriceErrorState
init {
viewModelScope.launch {
when(_subject.value.toString()) {
"Toast" -> emailRepository.getCalibratePrice().collect {
when(it) {
is Status.Success -> {
calibrateRepairPrice = it.data!!
_calirateRepairPriceErrorState.postValue(Status.success(Unit))
}
is Status.Loading -> _calirateRepairPriceErrorState.postValue(Status.loading())
is Status.Failure -> _calirateRepairPriceErrorState.postValue(Status.failed(it.message))
}
}
else -> emailRepository.getRepairPrice().collect {
when(it) {
is Status.Success -> {
calibrateRepairPrice = it.data!!
_calirateRepairPriceErrorState.postValue(Status.success(Unit))
}
is Status.Loading -> _calirateRepairPriceErrorState.postValue(Status.loading())
is Status.Failure -> _calirateRepairPriceErrorState.postValue(Status.failed(it.message))
}
}
}
price.postValue(calibrateRepairPrice.head!!.basePrice)
}
}
You can now observe the status in one of your fragments (but you dont need to!)
Fragment
viewModel.calibrateRepairPriceErrorState.observe(viewLifecycleOwner) { status ->
when(status) {
is Status.Success -> requireContext().toast("Price successfully loaded")
is Status.Loading -> requireContext().toast("Price is loading")
is Status.Failure -> requireContext().toast("Error, Price could not be loaded")
}
}
This is my toast extensions function:
fun Context.toast(text: String, duration: Int = Toast.LENGTH_SHORT) {
Toast.makeText(this, text, duration).show()
}

How to return response value from coroutine

I've recently work with Kotlin, and got really stuck with this one problem. I'm trying to return float value receive onResponse of a coroutine api call function. I'm trying to create a class that handle api call and use it on a fragment.
FunctionA.kt
class FunctionA(val context: Context?, val A: Float?, val B: String?){
private var cardApi: CardApi = ApiClient.createApi().create(CardApi::class.java)
....
func getBalance(cardNo: String): Float?{
val cardBalance: Float = null
GlobalScope.launch(Dispatchers.Main) {
val cardDetails = cardApi.getCardBalance(cardNo)
cardDetails.enqueue(object : Callback<Card> {
override fun onFailure(call: Call<Card>, t: Throwable) {
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to t.message!!)
}
override fun onResponse(call: Call<Card>, response: Response<Card>) {
if (response.isSuccessful) {
val card = response.body()!!
cardBalance = card.cardAvailableBalance
} else {
val error: ApiError = ErrorUtils.parseError(response)
val message = error.code + error.message
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to message)
context!!.toast("Errror: " + message)
promptErrorDialog(error)
}
}
})
}}
return cardBalance
}
....
....
}
FragmentClass.kt
class FragmentClass : BaseFragment(){
val galA = 10.5f
val galB = "Test"
private var pass = FunctionA(context!!, valA ,valB)
....
val point = "sasd12125"
private fun gooToo(){
val B = pass.getBalance(point)
print("TEST")
println("value B: " + B)
}
....
}
What happend right now, since the coroutine will take some time in background, val B are null and didn't get the value obtained onResponse. Only after I try to call that functionA again, then the value are updated. I'm not sure if I'm doing it right and I've tried to search for solutions, but it doesn't suit with my current situation. Probably my searching skill are soo bad.
Output
TEST
value B: null
How should I wait for the coroutine to finish before return the cardBalance value?

Proper way to return a single value from a coroutine is to use await().
Now, since you use coroutine to wrap some callback API, that wouldn't work so well. So I would suggest to go with something like this:
val scope = CoroutineScope(Dispatchers.IO)
suspend fun getBalance(cardNo: String): Float{
val res = CompletableDeferred<Float>()
scope.launch {
val cardDetails = cardApi.getCardBalance(cardNo)
cardDetails.enqueue(object : Callback<Card> {
override fun onFailure(call: Call<Card>, t: Throwable) {
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to t.message!!)
}
override fun onResponse(call: Call<Card>, response: Response<Card>) {
if (response.isSuccessful) {
val card = response.body()!!
res.complete(card.cardAvailableBalance)
} else {
val error: ApiError = ErrorUtils.parseError(response)
val message = error.code + error.message
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to message)
res.completeExceptionally(message)
withContext(Dispatchers.Main) {
promptErrorDialog(error)
}
}
}
})
}
return res.await()
}
A few points to consider. First, I used Dispatchers.IO instead of Dispatchers.Main, and switch to Main thread only when needed using withContext(Dispatchers.Main). Otherwise, you're just running your IO on the main thread, coroutine or not.
Second, using GlobalScope is a bad practice, and you should avoid it at all cost. Instead I create a custom scope that you can .cancel() to prevent coroutine leak.
Third, the most correct way would be to return Deferred<Float>, and not Float, since await() is blocking. But I left it for simplicity.

To solve my little problem I end up using a callback to pass the response data. I found that this method work perfectly and easier to understand for my level of understanding. This method skeleton can also be reused for any api service call that I want to use in the future.
FunctionA.kt
class FunctionA(val context: Context?, val A: Float?, val B: String?){
private var cardApi: CardApi = ApiClient.createApi().create(CardApi::class.java)
private var card: Card? = null
interface CardBalanceCallback {
fun processFinish(output: Boolean, cardBalance: Float?)
}
fun getCardBalance(cardNo: String, callback: CardBalanceCallback) = runBlocking {
getBalance(cardNo, callback)
}
private fun getBalance(cardNo: String, callback: CardBalanceCallback) = CoroutineScope(Dispatchers.Main).launch {
try {
val response = cardApi.getCardBalance(cardNo).await()
if (response.isSuccessful) {
card = response.body()
callback.processFinish(true, card!!.cardAvailableBalance)
} else {
callback.processFinish(false, null)
val error: ApiError = ErrorUtils.parseError(response)
val message = when {
error.error.code.isNotEmpty() -> error.error.code + error.error.message
else -> error.code + error.message
}
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to message)
promptErrorDialog(error)
}
} catch (e: HttpException) {
callback.processFinish(false, null)
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to e.message!!)
context!!.toast(e.message.toString())
} catch (e: Throwable) {
callback.processFinish(false, null)
trackEvent(API_READ_CARD_BALANCE_ERROR, ERROR to e.message!!)
context!!.toast( e.message.toString())
}
}
....
....
}
FragmentClass.kt
class FragmentClass : BaseFragment(){
private var funcService = FunctionA(null, null ,null)
....
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
(activity!!.application as App).component.inject(this)
val valA = 10.5f
val valB = "Test"
val cardNo = "4001526976443264"
val cardExpDate = "1119"
funcService = FunctionA(context!!, valA ,valB)
getCardBalanceApi(cardNo, cardExpDate)
}
....
private fun getCardBalanceApi(cardNo: String, cardExpDate: String?) {
showLoadingDialog()
funcService.getCardBalance(cardNo, object : SmartPayService.CardBalanceCallback {
override fun processFinish(output: Boolean, cardBalance: Float?) {
dismissLoadingDialog()
if (cardBalance != null) {
checkBalance(cardNo, cardBalance, cardExpDate)
}
}
})
}
....
}
This is some simple changes that I made for this particular problem on my first post. This approach might not be as good or smooth enough as I'm still learning. Hope it help some of you guys. cheers

Make getBalance() a suspend function and then call using lifecycleScope in your fragment
private fun gooToo(){
lifecycleScope.launch {
val B = pass.getBalance(point)
print("TEST")
println("value B: " + B)
}
}
getBalance() function signature would be something like
suspend fun getBalance(): Float = withContext(Dispatchers.IO)