Dễ dàng thêm tính năng đăng nhập vào ứng dụng Android bằng FirebaseUI

dependencies {
    // Check Maven Central for the latest version:
    // https://central.sonatype.com/artifact/com.firebaseui/firebase-ui-auth/versions
    implementation("com.firebaseui:firebase-ui-auth:10.0.0-beta02")

    // Required only if Facebook login support is required
    // Find the latest Facebook SDK releases here: https://goo.gl/Ce5L94
    implementation("com.facebook.android:facebook-android-sdk:8.x")
}

<resources>
    <string name="facebook_application_id" translatable="false">YOUR_FACEBOOK_APP_ID</string>
    <string name="facebook_login_protocol_scheme" translatable="false">fbYOUR_FACEBOOK_APP_ID</string>
    <string name="facebook_client_token" translatable="false">CHANGE-ME</string>
</resources>

val configuration = authUIConfiguration {
    context = applicationContext
    providers {
        provider(AuthProvider.Email())
        provider(
            AuthProvider.Phone(
                defaultCountryCode = "US",
            )
        )
        provider(
            AuthProvider.Google(
                scopes = listOf("email"),
                serverClientId = null,
            )
        )
        provider(AuthProvider.Facebook())
    }
}

val configuration = authUIConfiguration {
    context = applicationContext
    providers {
        provider(
            AuthProvider.Email(
                isEmailLinkSignInEnabled = true,
                emailLinkActionCodeSettings = actionCodeSettings {
                    url = "https://example.com/auth"
                    handleCodeInApp = true
                    setAndroidPackageName(
                        "com.example.app",
                        true,
                        null,
                    )
                },
            )
        )
    }
}

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val authUI = FirebaseAuthUI.getInstance()

        setContent {
            MyAppTheme {
                val configuration = authUIConfiguration {
                    context = applicationContext
                    theme = AuthUITheme.fromMaterialTheme()
                    providers {
                        provider(AuthProvider.Email())
                        provider(
                            AuthProvider.Google(
                                scopes = listOf("email"),
                                serverClientId = null,
                            )
                        )
                    }
                }

                if (authUI.isSignedIn()) {
                    HomeScreen()
                } else {
                    FirebaseAuthScreen(
                        configuration = configuration,
                        authUI = authUI,
                        onSignInSuccess = { result ->
                            // User signed in successfully
                        },
                        onSignInFailure = { exception ->
                            // Sign in failed
                        },
                        onSignInCancelled = {
                            finish()
                        },
                    )
                }
            }
        }
    }
}

lifecycleScope.launch {
    FirebaseAuthUI.getInstance().signOut(applicationContext)
}

lifecycleScope.launch {
    FirebaseAuthUI.getInstance().delete(applicationContext)
}

val configuration = authUIConfiguration {
    context = applicationContext
    providers {
        provider(AuthProvider.Email())
        provider(AuthProvider.Google(scopes = listOf("email"), serverClientId = null))
    }
    theme = AuthUITheme.Adaptive
}

private val authLauncher = registerForActivityResult(
    ActivityResultContracts.StartActivityForResult(),
) { result ->
    if (result.resultCode == RESULT_OK) {
        val user = FirebaseAuth.getInstance().currentUser
        // ...
    } else {
        // User cancelled or sign-in failed
    }
}

val configuration = authUIConfiguration {
    context = applicationContext
    providers {
        provider(AuthProvider.Email())
        provider(
            AuthProvider.Google(
                scopes = listOf("email"),
                serverClientId = null,
            )
        )
    }
}

val controller = FirebaseAuthUI.getInstance().createAuthFlow(configuration)
authLauncher.launch(controller.createIntent(this))