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Jetpack Compose Phone Auth
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| dependencies { | |
| implementation("com.google.android.gms:play-services-auth:20.2.0") | |
| implementation("com.google.android.gms:play-services-auth-api-phone:18.0.1") | |
| implementation("com.googlecode.libphonenumber:libphonenumber:8.12.48") | |
| } |
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| @Composable | |
| fun PhoneNumberConsent( | |
| onPhoneNumberFetchedFromDevice: (phoneNumber: String) -> Unit, | |
| ) { | |
| val context = LocalContext.current | |
| val phoneNumberHintIntentResultLauncher = | |
| rememberLauncherForActivityResult(ActivityResultContracts.StartIntentSenderForResult()) { result -> | |
| try { | |
| val phoneNumber = Identity.getSignInClient(context).getPhoneNumberFromIntent(result.data) | |
| onPhoneNumberFetchedFromDevice(phoneNumber) | |
| } catch(e: Exception) { | |
| Log.e("PhoneAuth", "Phone Number Hint failed") | |
| } | |
| } | |
| LaunchedEffect(Unit) { | |
| val request: GetPhoneNumberHintIntentRequest = | |
| GetPhoneNumberHintIntentRequest.builder().build() | |
| Identity.getSignInClient(context) | |
| .getPhoneNumberHintIntent(request) | |
| .addOnSuccessListener { | |
| try { | |
| phoneNumberHintIntentResultLauncher.launch(IntentSenderRequest.Builder(it).build()) | |
| } catch(e: Exception) { | |
| Log.e("PhoneAuth", "Launching the PendingIntent failed") | |
| } | |
| }.addOnFailureListener { | |
| Log.e("PhoneAuth", it.toString()) | |
| } | |
| } | |
| } |
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| class PhoneNumberVisualTransformation( | |
| countryCode: String = Locale.current.region | |
| ) : VisualTransformation { | |
| private val phoneNumberFormatter = | |
| PhoneNumberUtil.getInstance().getAsYouTypeFormatter(countryCode) | |
| override fun filter(text: AnnotatedString): TransformedText { | |
| val transformation = reformat(text, Selection.getSelectionEnd(text)) | |
| return TransformedText(AnnotatedString(transformation.formatted ?: ""), object : | |
| OffsetMapping { | |
| override fun originalToTransformed(offset: Int): Int { | |
| return transformation.originalToTransformed[offset] | |
| } | |
| override fun transformedToOriginal(offset: Int): Int { | |
| return transformation.transformedToOriginal[offset] | |
| } | |
| }) | |
| } | |
| private fun reformat(s: CharSequence, cursor: Int): Transformation { | |
| phoneNumberFormatter.clear() | |
| val curIndex = cursor - 1 | |
| var formatted: String? = null | |
| var lastNonSeparator = 0.toChar() | |
| var hasCursor = false | |
| s.forEachIndexed { index, char -> | |
| if (PhoneNumberUtils.isNonSeparator(char)) { | |
| if (lastNonSeparator.code != 0) { | |
| formatted = getFormattedNumber(lastNonSeparator, hasCursor) | |
| hasCursor = false | |
| } | |
| lastNonSeparator = char | |
| } | |
| if (index == curIndex) { | |
| hasCursor = true | |
| } | |
| } | |
| if (lastNonSeparator.code != 0) { | |
| formatted = getFormattedNumber(lastNonSeparator, hasCursor) | |
| } | |
| val originalToTransformed = mutableListOf<Int>() | |
| val transformedToOriginal = mutableListOf<Int>() | |
| var specialCharsCount = 0 | |
| formatted?.forEachIndexed { index, char -> | |
| if (!PhoneNumberUtils.isNonSeparator(char)) { | |
| specialCharsCount++ | |
| } else { | |
| originalToTransformed.add(index) | |
| } | |
| transformedToOriginal.add(index - specialCharsCount) | |
| } | |
| originalToTransformed.add(originalToTransformed.maxOrNull()?.plus(1) ?: 0) | |
| transformedToOriginal.add(transformedToOriginal.maxOrNull()?.plus(1) ?: 0) | |
| return Transformation(formatted, originalToTransformed, transformedToOriginal) | |
| } | |
| private fun getFormattedNumber(lastNonSeparator: Char, hasCursor: Boolean): String? { | |
| return if (hasCursor) { | |
| phoneNumberFormatter.inputDigitAndRememberPosition(lastNonSeparator) | |
| } else { | |
| phoneNumberFormatter.inputDigit(lastNonSeparator) | |
| } | |
| } | |
| private data class Transformation( | |
| val formatted: String?, | |
| val originalToTransformed: List<Int>, | |
| val transformedToOriginal: List<Int> | |
| ) | |
| } |
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| @Composable | |
| fun SignInScreen() { | |
| var text by remember { mutableStateOf(TextFieldValue("")) } | |
| Column( | |
| verticalArrangement = Arrangement.Center, | |
| horizontalAlignment = Alignment.CenterHorizontally, | |
| modifier = Modifier | |
| .fillMaxSize() | |
| .background(Color.White) | |
| ) { | |
| TextField( | |
| value = text, | |
| onValueChange = { text = it }, | |
| modifier = Modifier.fillMaxWidth(), | |
| placeholder = { Text(text = "+359 888 123456")}, | |
| singleLine = true, | |
| leadingIcon = null, | |
| visualTransformation = PhoneNumberVisualTransformation(), | |
| keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Phone), | |
| ) | |
| } | |
| } | |
| @Preview(showBackground = true, device = Devices.PIXEL_2) | |
| @Composable | |
| fun DefaultSignInScreen() { | |
| DodiTheme { | |
| SignInScreen() | |
| } | |
| } |
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