Firebase Auth - Password-less Email - Demo

FirebaseAuth

implementation 'com.google.android.gms:play-services-auth:17.0.0'

implementation 'com.google.firebase:firebase-auth:19.2.0'


<uses-permission android:name="android.permission.INTERNET"/>

private FirebaseAuth mAuth;
mAuth = FirebaseAuth.getInstance();

ActionCodeSettings actionCodeSettings;

actionCodeSettings = ActionCodeSettings.newBuilder()
                .setUrl("https://droidmentor.com/finishSignUp")
                .setHandleCodeInApp(true)
                .setAndroidPackageName("com.droidmentor.firebaseservicesdemo", false, null)
                .build();
                
mAuth.sendSignInLinkToEmail(emailID, actionCodeSettings)
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                Log.d(TAG, "onComplete: ");
                if (task.isSuccessful()) {
                    Log.d(TAG, "Email sent.");
                } else {
                    Objects.requireNonNull(task.getException()).printStackTrace();
                }
            }
        });    
        
System.err: com.google.firebase.FirebaseException: An internal error has occurred. 
[ UNAUTHORIZED_DOMAIN:Domain not whitelisted by project ]

com.google.firebase.auth.FirebaseAuthException: Please activate Dynamic Links in the 
Firebase Console and agree to the terms and conditions.

<activity android:name=".MailAuthenticationActivity">
    <intent-filter>
        <action android:name="android.intent.action.VIEW"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <category android:name="android.intent.category.BROWSABLE"/>
        <data android:host="droidmentor.com" android:scheme="https"/>
    </intent-filter>
</activity>

Intent intent = getIntent();
String emailLink = intent.getData().toString();

mAuth.isSignInWithEmailLink(emailLink)


mAuth.signInWithEmailLink(emailID, emailLink)
        .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {
                    Toast.makeText(activity, "Successfully signed in with email link!", Toast.LENGTH_SHORT).show();

                    if (task.getResult() != null && task.getResult().getUser() != null) {

                        FirebaseUser user = task.getResult().getUser();

                        if (!TextUtils.isEmpty(user.getUid()))
                            Log.d(TAG, "signInWithCredential: " + user.getUid());
                    }
                }
            }
        });
        
// For example use *es* for Spanish
mAuth.setLanguageCode("YOUR_LANGUAGE_CODE");