I am unable to get Google's one tap sign in implementation to work. The code runs, the button works however, the addOnSuccessListener never runs. I don't understand what the issue could be, as according to the documentation I've done everything correctly. The only information I get is that on failure of the addOnSuccessListener is a null reference error. I've used other stack overflow answers to get where I am, but none fix the issue One Tap Sign in - Activity Result with Jetpack Compose. I'm starting to believe it's with the setup on google play console and firebase, but I am unsure.
Some things have been cut out from the code for simplicity reasons.
MainActivity.kt
// Tags
private val TAG_SIGNIN = "Google Sign In"
private val TAG_FIREBASE = "Firebase backend auth"
private val TAG_GOOGLE = "Google Sign In Results"
@AndroidEntryPoint
class MainActivity2 : ComponentActivity() {
// Google Sign in
private lateinit var oneTapClient: SignInClient
private lateinit var signInRequest: BeginSignInRequest
private lateinit var signUpRequest: BeginSignInRequest
// Firebase
private lateinit var auth: FirebaseAuth
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// Firebase Auth Instantiate
auth = Firebase.auth
// Google Onetap Sign in
oneTapClient = Identity.getSignInClient(this)
signInRequest = BeginSignInRequest.builder()
.setGoogleIdTokenRequestOptions(
BeginSignInRequest.GoogleIdTokenRequestOptions.builder()
.setSupported(true)
.setServerClientId(getString(R.string.firebase_client_id))
.setFilterByAuthorizedAccounts(true)
.build())
.setAutoSelectEnabled(true)
.build()
signUpRequest = BeginSignInRequest.builder()
.setGoogleIdTokenRequestOptions(
BeginSignInRequest.GoogleIdTokenRequestOptions.builder()
.setSupported(true)
.setServerClientId(getString(R.string.firebase_client_id))
.setFilterByAuthorizedAccounts(false)
.build())
.build()
setContent {
val authViewModel: LoginViewModel = viewModel()
val authState = authViewModel.viewstate.collectAsState().value
LoginScreen(
activity,
oneTapClient,
signInRequest,
signUpRequest,
authViewModel,
auth)
}
}
}
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun LoginScreen(
activity: Activity,
oneTapClient: SignInClient,
signInRequest: BeginSignInRequest,
signUpRequest: BeginSignInRequest,
loginViewModel: LoginViewModel,
auth: FirebaseAuth,
) {
val launcher = rememberLauncherForActivityResult(
ActivityResultContracts.StartIntentSenderForResult()
) { result ->
if (result.resultCode == RESULT_OK) {
val credential = oneTapClient.getSignInCredentialFromIntent(result.Data)
val idToken = credential.googleIdToken
if (idToken != null) {
// Got an ID token from Google. Use it to authenticate
// with your backend.
when {
idToken != null -> {
// Got an ID token from Google. Use it to authenticate
// with Firebase.
val firebaseCredential = getCredential(idToken, null)
auth.signInWithCredential(firebaseCredential)
.addOnCompleteListener(activity) { task ->
if (task.isSuccessful) {
// Sign in success, update UI with the signed-in user's information
Log.d(TAG_FIREBASE, "signInWithCredential:success")
val user = auth.currentUser
} else {
// If sign in fails, display a message to the user.
Log.w(TAG_FIREBASE,
"signInWithCredential:failure",
task. Exception)
}
}
}
else -> {
// Shouldn't happen.
Log.d(TAG_GOOGLE, "No ID token!")
}
}
Log.d("LOG", idToken)
} else {
Log.d("LOG", "Null Token")
}
} else {
Log.e("Response", "${result.resultCode}")
}
}
Material3AppTheme() {
Scaffold { padding ->
padding
Column(
modifier = Modifier.fillMaxSize(),
verticalArrangement = Arrangement.Center,
horizontalAlignment = Alignment.CenterHorizontally
) {
val scope = rememberCoroutineScope()
Surface(
onClick = {
scope.launch {
loginViewModel.signIn(activity, oneTapClient, signInRequest, signUpRequest, launcher)
}
},
color = MaterialTheme.colorScheme.onPrimary,
shadowElevation = 0.dp,
shape = RoundedCornerShape(5.dp),
border = BorderStroke(width = 1.dp, color = MaterialTheme.colorScheme.primaryContainer),
) {
Row(
modifier = Modifier
.padding(
start = 12.dp,
end = 16.dp,
),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.Center,
) {
Icon(
painter = painterResource(id = R.drawable.ic_google_logo),
contentDescription = "SignInButton",
tint = androidx.compose.ui.graphics.Color.Unspecified,
)
Text(text = "Sign in with Google")
}
}
}
}
}
}
LoginViewModel.kt
fun signIn(
activity: Activity,
oneTapClient: SignInClient,
signInRequest: BeginSignInRequest,
signUpRequest: BeginSignInRequest,
launcher: ActivityResultLauncher<IntentSenderRequest>,
) {
oneTapClient.beginSignIn(signInRequest)
.addOnSuccessListener(activity) { result ->
try {
val intentSenderRequest = IntentSenderRequest.Builder(result.pendingIntent.intentSender).build()
launcher.launch(intentSenderRequest)
Log.d(TAG_SIGNIN, "Started One Tap Sign In")
} catch (e: IntentSender.SendIntentException) {
Log.e(TAG_SIGNIN, "Couldn't start One Tap UI: ${e.localizedMessage}")
}
}
.addOnFailureListener(activity) { e ->
e.localizedMessage?.let { Log.d(TAG_SIGNUP, "$it: non functional") }
oneTapClient.beginSignIn(signUpRequest)
.addOnSuccessListener(activity) { result ->
try {
val intentSenderRequest = IntentSenderRequest.Builder(result.pendingIntent.intentSender).build()
launcher.launch(intentSenderRequest)
} catch (e: IntentSender.SendIntentException) {
Log.e(TAG_SIGNUP, "Couldn't start One Tap UI: ${e.localizedMessage}")
}
}
.addOnFailureListener(activity) { e ->
// No Google Accounts found. Just continue presenting the signed-out UI.
e.localizedMessage?.let { Log.d(TAG_SIGNUP, "$it: even less non functional") }
}
}
}
