Develop Reference

access token and refresh token from oneTap sign in/up

I'm trying to get access token and refresh token from my app. I'm using one tap sign in but I cant seem to get the desired access and refresh tokens (for Oauth2) .One tap works just fine in both signIn/signUp. I tried using the following:
Module:
#Provides
fun provideOneTapClient(
context: Context
) = Identity.getSignInClient(context)
#Provides
#Named("signInRequest")
fun provideSignInRequest(
app: Application
) = BeginSignInRequest.builder()
.setGoogleIdTokenRequestOptions(
BeginSignInRequest.GoogleIdTokenRequestOptions.builder()
.setSupported(true)
.setServerClientId(app.getString(R.string.web_client_id))
.setFilterByAuthorizedAccounts(true)
.build()
)
.setAutoSelectEnabled(true)
.build()
#Provides
#Named("signUpRequest")
fun provideSignUpRequest(
app: Application
) = BeginSignInRequest.builder()
.setGoogleIdTokenRequestOptions(
BeginSignInRequest.GoogleIdTokenRequestOptions.builder()
.setSupported(true)
.setServerClientId(app.getString(R.string.web_client_id))
.setFilterByAuthorizedAccounts(false)
.build()
)
.build()
#Provides
fun provideGoogleSignInOptions(
app: Application
) = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(app.getString(R.string.web_client_id))
.requestScopes(Scope(CalendarScopes.CALENDAR))
.requestServerAuthCode(app.getString(R.string.web_client_id), true)
.requestEmail()
.build()
#Provides
fun provideGoogleSignInClient(
app: Application,
options: GoogleSignInOptions
) = GoogleSignIn.getClient(app, options)
#Provides
fun provideAuthRepository(
auth: FirebaseAuth,
oneTapClient: SignInClient,
#Named("signInRequest")
signInRequest: BeginSignInRequest,
#Named("signUpRequest")
signUpRequest: BeginSignInRequest,
signInClient: GoogleSignInClient,
usersRef: CollectionReference
): AuthRepository = AuthRepositoryImpl(
auth = auth,
oneTapClient = oneTapClient,
signInRequest = signInRequest,
signUpRequest = signUpRequest,
signInClient = signInClient,
usersRef = usersRef
)
AuthImpl:
override suspend fun oneTapSignInWithGoogle() = flow {
try {
emit(Loading)
val result = oneTapClient.beginSignIn(signInRequest).await()
emit(Success(result))
} catch (e: Exception) {
emit(Failure(e))
}
}
override suspend fun oneTapSignUpWithGoogle() = flow {
try {
emit(Loading)
val result = oneTapClient.beginSignIn(signUpRequest).await()
emit(Success(result))
} catch (e: Exception) {
emit(Failure(e))
}
}
override suspend fun firebaseSignInWithGoogle(googleCredential: AuthCredential) = flow {
try {
emit(Loading)
val authResult = auth.signInWithCredential(googleCredential).await()
val isNewUser = authResult.additionalUserInfo?.isNewUser
emit(Success(isNewUser))
} catch (e: Exception) {
emit(Failure(e))
}
}
viewmodel:
override suspend fun oneTapSignInWithGoogle() = flow {
try {
emit(Loading)
val result = oneTapClient.beginSignIn(signInRequest).await()
emit(Success(result))
} catch (e: Exception) {
emit(Failure(e))
}
}
override suspend fun oneTapSignUpWithGoogle() = flow {
try {
emit(Loading)
val result = oneTapClient.beginSignIn(signUpRequest).await()
emit(Success(result))
} catch (e: Exception) {
emit(Failure(e))
}
}
override suspend fun firebaseSignInWithGoogle(googleCredential: AuthCredential) = flow {
try {
emit(Loading)
val authResult = auth.signInWithCredential(googleCredential).await()
val isNewUser = authResult.additionalUserInfo?.isNewUser
emit(Success(isNewUser))
} catch (e: Exception) {
emit(Failure(e))
}
}
SignIn Screen:
val launcher = rememberLauncherForActivityResult(StartIntentSenderForResult()) { result ->
if (result.resultCode == RESULT_OK) {
try {
val credentials = viewModel.oneTapClient.getSignInCredentialFromIntent(result.data)
val googleIdToken = credentials.googleIdToken
val googleCredentials = getCredential(googleIdToken, null)
viewModel.signInWithGoogle(googleCredentials)
} catch (it: ApiException) {
print(it)
}
}
}
fun launch(signInResult: BeginSignInResult) {
val intent = IntentSenderRequest.Builder(signInResult.pendingIntent.intentSender).build()
launcher.launch(intent)
}
when (val oneTapSignInResponse = viewModel.oneTapSignInState.value) {
is Loading -> ProgressBar()
is Success -> oneTapSignInResponse.data?.let {
LaunchedEffect(it) {
launch(it)
}
}
is Failure -> oneTapSignInResponse.e?.let {
LaunchedEffect(Unit) {
print(it)
if (it.message == "16: Cannot find a matching credential.") {
viewModel.oneTapSignUp()
}
}
}
}
when (val oneTapSignUpResponse = viewModel.oneTapSignUpState.value) {
is Loading -> ProgressBar()
is Success -> oneTapSignUpResponse.data?.let {
LaunchedEffect(it) {
launch(it)
}
}
is Failure -> oneTapSignUpResponse.e?.let {
LaunchedEffect(Unit) {
print(it)
}
}
}
when (val signInResponse = viewModel.signInState.value) {
is Loading -> ProgressBar()
is Success -> signInResponse.data?.let { isNewUser ->
if (isNewUser) {
LaunchedEffect(isNewUser) {
viewModel.createUser()
}
} else {
LaunchedEffect(Unit) {
navController.navigate(EisenhowerScreens.EisenHomeScreen.name) {
popUpTo(EisenhowerScreens.LoginScreen.name) {
inclusive = true
}
}
}
}
}
is Failure -> signInResponse.e?.let {
LaunchedEffect(Unit) {
print(it)
}
}
}
I'm using jetpack compose for the app. and I'm not sure what I need to have Access and Refresh tokens.

Firebase Auth with Kotlin Flow

I am learning clean architecture and Kotlin Flow. I want to check is user mail exists in the Firebase Auth base. However, when I threw an error to the flow function, app is crash.
CheckUserUseCase.kt
class CheckUserUseCase #Inject constructor(private val repository: SignInRepository) {
operator fun invoke(mail: String): Flow<Status<Boolean, String>> = flow {
emit(Status.Loading(data = null))
try {
repository.isUserExists(mail = mail)
emit(Status.Success(data = true))
} catch (e: Exception) {
emit(Status.Error(message = e.message, data = false))
}
}
}
SignInRepository.kt
interface SignInRepository {
suspend fun isUserExists(mail: String)
}
SignInRepositoryImpl.kt
class SignInRepositoryImpl #Inject constructor(private val firebaseUserActions: FirebaseUserActions) : SignInRepository {
override suspend fun isUserExists(mail: String) {
firebaseUserActions.isUserExists(mail = mail)
}
}
FirebaseAuthentication.kt
class FirebaseAuthentication #Inject constructor(private val auth: FirebaseAuth) : FirebaseUserActions {
override suspend fun isUserExists(mail: String){
auth.fetchSignInMethodsForEmail(mail).addOnCompleteListener { task ->
task.result.signInMethods?.let {
if (it.size != 0) Log.i("App.tag", "True.")
else throw IOException() <-- Crash point.
}
}.addOnFailureListener { e -> e.printStackTrace() }
.await()
}
}
How can I return a state to Kotlin Flow method? Thank you!

Please try the following approach:
override suspend fun isUserExists(mail: String): Status {
return try {
val result = auth.fetchSignInMethodsForEmail(mail).await()
result.signInMethods?.let {
if (it.isNotEmpty()) {
Status.Success(data = true)
} else {
Status.Error(message = "No data", data = false)
}
} ?: Status.Error(message = "No Data", data = false)
} catch (e: Exception) {
Status.Error(message = e.message, data = false)
}
}
In CheckUserUseCase class just emit the result of calling isUserExists():
emit(Status.Loading(data = null))
emit(repository.isUserExists(mail = mail))

Try
it.size != 0 && it.size != null
and
if (task.isSuccessful()) {
[...]
task.result.signInMethods?.let {
[...]
}

How to synchonize executing http requests (kotlin, android)?

I am debugging an application that communicates with an IoT device via http.
In response to commands, the device sends information in xml format.
An application can also receive binary data on a GET request.
In the functionality of the application, filling the RecyclerView from the list and loading images to fill the RecyclerView and executing individual commands to change modes.
The problem is that the device does not have the most powerful processor, and when a large number of http commands are received, the service cannot cope and hangs for a long time until the WiFi channel fails.
I can’t figure out how to organize interaction so that each next command waits for the previous one to complete. The solution is complicated by the fact that populating the RecyclerView, loading images, and executing commands are in different parts of the code, and each is executed asynchronously.
Populating RecyclerView:
private fun initViewModel(filter: String) {
val st = Storage(requireContext())
val cache = "${st.externalCacheDir}/$filter/"
val viewModel = ViewModelProvider(this).get(DeviceListViewModel::class.java)
viewModel.getRecycerListObserver().observe(requireActivity(), Observer<ResponseData> {
if (it != null) {
val media = it.mediaData?.filter { it.mediaData?.fPath!!.contains(filter, false) }
mediaList = arrayListOf()
if (media != null) {
for (i in media.sortedByDescending { it.mediaData?.fTimeCode }) {
i.mediaData?.let { it1 -> mediaList.add(it1) }
}
}
viewModel.recyclerListLiveData = MutableLiveData()
ThumbDownloader(dataAdapter, mediaList, cache, swipeLayout).execute()
} else {
Toast.makeText(activity, "Error in getting data", Toast.LENGTH_SHORT).show()
}
})
viewLifecycleOwner.lifecycleScope.launch {
viewModel.makeApiCall()
}
}
ViewModel:
class DeviceListViewModel : ViewModel() {
var recyclerListLiveData: MutableLiveData<ResponseData>
init {
recyclerListLiveData = MutableLiveData()
}
fun getRecycerListObserver(): MutableLiveData<ResponseData> {
return recyclerListLiveData
}
fun makeApiCall() {
viewModelScope.launch(Dispatchers.IO) {
try {
val retroInstance =
RetroInstance.getRetroInstance(MainActivity.BaseUrl).create(RetroService::class.java)
val response = retroInstance.getDataFromApi(1, Cmd.WIFIAPP_CMD_FILELIST)
recyclerListLiveData.postValue(response)
} catch (e: Exception) {
var response: ResponseData? = null
when (e) {
is ConnectException -> {
recyclerListLiveData.postValue(response)
}
is SocketTimeoutException -> {
recyclerListLiveData.postValue(response)
}
}
}
}
}
}
Service to make a command (processing results in the Handler):
class DeviceService {
private val handler: Handler
private var mJob: Job? = null
constructor(handler: Handler) {
this.handler = handler
}
fun sendCommand(cmd: Int) {
val service = RetroInstance.buildService(MainActivity.BaseUrl, RetroService::class.java)
mJob = CoroutineScope(Dispatchers.IO).launch {
val response = when (cmd) {
Cmd.WIFIAPP_CMD_MOVIE_GET_LIVEVIEW_FMT -> {
try {
service.getLinkFromApi(1, cmd)
} catch (e: Exception) {
handler.obtainMessage(Msg.MESSAGE_TOAST, "Error in getting data").sendToTarget()
mJob?.cancel()
}
}
else -> {
try {
service.makeCommand(1, cmd)
} catch (e: Exception) {
handler.obtainMessage(Msg.MESSAGE_TOAST, "Error in getting data").sendToTarget()
mJob?.cancel()
}
}
}
withContext(Dispatchers.Main) {
try {
when (cmd) {
Cmd.WIFIAPP_CMD_MOVIE_GET_LIVEVIEW_FMT -> {
handler.obtainMessage(Msg.MESSAGE_LINK_FORMAT, response).sendToTarget()
}
else -> {
handler.obtainMessage(Msg.MESSAGE_PAR_FUNCTION, response).sendToTarget()
}
}
} catch (e: Exception) {
when (e) {
is ConnectException -> {
handler.obtainMessage(Msg.MESSAGE_TOAST, "Connection lost").sendToTarget()
}
is SocketTimeoutException -> {
handler.obtainMessage(Msg.MESSAGE_TOAST, "Connection lost").sendToTarget()
}
}
}
mJob?.cancelAndJoin()
}
}
}
}
Downloading a images:
class ThumbDownloader(dataAdapter: DeviceAdapter, data: ArrayList<MediaData>, file_path: String, swipe: SwipeRefreshLayout) : CoroutineScope {
private var job: Job = Job()
private var file_path: String
private var dataAdapter: DeviceAdapter
private var data: ArrayList<MediaData>
private var swipe: SwipeRefreshLayout
init {
this.data = data
this.file_path = file_path
this.dataAdapter = dataAdapter
this.swipe = swipe
}
override val coroutineContext: CoroutineContext
get() = Dispatchers.Main + job
fun cancel() {
job.cancel()
}
fun execute() = async {
var item: File? = null
for (i in data) {
val task = async(Dispatchers.IO) {
val url = i.fPath!!
val real_url = "${MainActivity.BaseUrl}$url"
item = NetworkUtil.downloadFile(real_url, file_path, false)
}
task.await()
if (item != null) {
dataAdapter.insertItem(i)
}
}
cancel()
swipe.isRefreshing = false
}
}
Any ideas how to come up with their synchronization while waiting for the previous commands to complete?

How to get variables out from a asynctask + try & catch block in kotlin (android studio)?

In these below two functions I am getting referrerUrl and addId. I want both of them to be fetched in onCreate but don't know how because it is in try & catch block also the getGaid() function is not running without AsyncTask.
fun getreferrUrl() {
//to install referrer client
val referrerClient = InstallReferrerClient.newBuilder(this).build()
referrerClient.startConnection(object : InstallReferrerStateListener {
override fun onInstallReferrerSetupFinished(responseCode: Int) {
when (responseCode) {
InstallReferrerResponse.OK -> {
// Connection established.
try {
val response: ReferrerDetails = referrerClient.installReferrer
val referrerUrl = response.installReferrer
// here we need referrerUrl out from this fuction
} catch (e: RemoteException) {
e.printStackTrace()
}
}
//
fun getGaid() {
AsyncTask.execute {
try {
val adInfo = AdvertisingIdClient.getAdvertisingIdInfo(this)
val myId: String = if (adInfo != null) adInfo.id else null.toString()
//here we need myId out from this fuction
} catch (e: java.lang.Exception) {...}
}
}
In onCreate we need both of those strings.
// In onCreate
val url = "http://instbng.com?device_id=$device_id&
&kd_id=$kd_id&ref=$referrerUrl&gaid=$myId"
loadUrl(url)

Without coroutines, you can put the results in properties, and create a function that uses both properties and call it from both callbacks. I renamed your get... functions to fetch... since they are asynchronous. The word get in a function name implies they are synchronous.
private var referrerUrl: String? = null
private var myId: String? = null
override fun onCreate(bundle: SavedInstanceState?) {
super.onCreate(bundle)
//...
fetchReferrerUrl()
fetchGaId()
}
// proceeds with workflow if referrerUrl and myId are both available
private fun proceedIfReady() {
val referrer = referrerUrl ?: return
val id = myId ?: return
val url = "http://instbng.com?device_id=$device_id&kd_id=$kd_id&ref=$referrer&gaid=$idd"
loadUrl(url)
}
fun fetchReferrerUrl() {
val referrerClient = InstallReferrerClient.newBuilder(this).build()
referrerClient.startConnection(object : InstallReferrerStateListener {
override fun onInstallReferrerSetupFinished(responseCode: Int) {
when (responseCode) {
InstallReferrerResponse.OK -> {
// Connection established.
try {
val response: ReferrerDetails = referrerClient.installReferrer
referrerUrl = response.installReferrer
proceedIfReady()
} catch (e: RemoteException) {
e.printStackTrace()
}
}
}
}
//... handle closed connection callback
}
}
private fun fetchGaId() {
AsyncTask.execute {
try {
val adInfo = AdvertisingIdClient.getAdvertisingIdInfo(this)
runOnUiThread { // in a Fragment use view?.post
myId = if (adInfo != null) adInfo.id else null.toString()
proceedIfReady()
}
} catch (e: java.lang.Exception) {...}
}
}

Android paging from local data (without room)

I'm trying to work with pagination library, to get list from server, and use it with local data, but i don't want to use room for it (don't have db in my app, and don't want to add it just for it),
so i have mediator, and i'm trying to implement PagingSource. the list should be flowable, so when i delete an item, it will update automatically.
mediator
class EventMediator(
private val id: String,
private val remoteDataSource: EventRemote,
private val eventLocalData: EvrntsLocal
) : RemoteMediator<Int, EventItem>() {
var hasNextKey = true
override suspend fun load(
loadType: LoadType,
state: PagingState<Int, EventItem>
): MediatorResult {
try {
val loadKey = when (loadType) {
LoadType.REFRESH -> STARTING_MEAL_INDEX
LoadType.PREPEND -> return MediatorResult.Success(endOfPaginationReached = true)
LoadType.APPEND -> {
if (!eventLocalData.hasNextKey) {
return MediatorResult.Success(endOfPaginationReached = true)
}
eventLocalData.getNumOfMeals()
}
}
val response = remoteDataSource.getEvents(loadKey)
return if (response is Result.Success) {
hasNextKey = !response.data.lastPage
if (loadType == LoadType.REFRESH) {
eventLocalData.clearMeals()
}
eventLocalData.saveMeals(response.data.items)
MediatorResult.Success(endOfPaginationReached = !hasNextKey)
} else {
MediatorResult.Error(IOException("Failed to get Events"))
}
} catch (e: IOException) {
return MediatorResult.Error(e)
} catch (e: HttpException) {
return MediatorResult.Error(e)
}
}
}
EventSource:
class EventSource(
private val eventLocalData: EvrntsLocal
) : PagingSource<Int, EventItem>() {
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, EventItem> {
val offset = (params.key ?: STARTING_MEAL_INDEX)
return try {
val response = eventLocalData.getMeals()
LoadResult.Page(
data = response,
prevKey = if (offset - NUM_OF_EVENTS <= STARTING_MEAL_INDEX) null else offset - NUM_OF_EVENTS,
nextKey = if (offset + NUM_OF_EVENTS >= response.size) null else offset + NUM_OF_EVENTS
)
} catch (exception: IOException) {
return LoadResult.Error(exception)
} catch (exception: HttpException) {
return LoadResult.Error(exception)
}
}
}
repository
fun getEvents(folderId: String): Flow<PagingData<EventItem>> {
return Pager(
config = PagingConfig(50),
remoteMediator = EventMediator(folderId, remoteDataSource, localDataSource),
pagingSourceFactory = { EventSource(localDataSource) }
) .flow
}
my local data:
class EvrntsLocal #Inject constructor(
) {
private val _eventChannel = ConflatedBroadcastChannel<List<EventItem>>(emptyList())
var hasNextKey: Boolean = true
fun observeMeals(): Flow<List<EventItem>> {
return _eventChannel.asFlow()
}
fun getMeals(): List<EventItem> {
return _eventChannel.value
}
fun saveMeals(list: List<EventItem>) {
_eventChannel.offer(_eventChannel.value.plus(list))
}
fun getNumOfMeals(): Int {
return _eventChannel.value.size
}
fun clearMeals() {
_eventChannel.offer(emptyList())
}
}