Add sign out

Author: marinacoelho

auth/app/src/main/java/com/google/firebase/quickstart/auth/GoogleSignInActivity.java

@@ -21,13 +21,17 @@
 import android.os.Bundle;
 import android.os.CancellationSignal;
 import android.util.Log;
+
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.credentials.ClearCredentialStateRequest;
 import androidx.credentials.Credential;
 import androidx.credentials.CredentialManager;
 import androidx.credentials.CredentialManagerCallback;
 import androidx.credentials.CustomCredential;
 import androidx.credentials.GetCredentialRequest;
 import androidx.credentials.GetCredentialResponse;
+import androidx.credentials.exceptions.ClearCredentialException;
 import androidx.credentials.exceptions.GetCredentialException;
 import com.google.android.libraries.identity.googleid.GetGoogleIdOption;
 import com.google.android.libraries.identity.googleid.GoogleIdTokenCredential;
@@ -126,7 +130,7 @@ private void createGoogleIdToken(Credential credential) {
             // Sign in to Firebase with using the token
             firebaseAuthWithGoogle(googleIdTokenCredential.getIdToken());
         } else {
-            Log.d(TAG, "Credential is not of type Google ID!");
+            Log.w(TAG, "Credential is not of type Google ID!");
         }
     }
     // [END create_google_id_token]
@@ -150,6 +154,31 @@ private void firebaseAuthWithGoogle(String idToken) {
     }
     // [END auth_with_google]
 
+    // [START sign_out]
+    private void signOut() {
+        // Firebase sign out
+        mAuth.signOut();
+
+        // When a user signs out, clear the current user credential state from all credential providers.
+        ClearCredentialStateRequest clearRequest = new ClearCredentialStateRequest();
+        credentialManager.clearCredentialStateAsync(
+                clearRequest,
+                new CancellationSignal(),
+                Executors.newSingleThreadExecutor(),
+                new CredentialManagerCallback<>() {
+                    @Override
+                    public void onResult(@NonNull Void result) {
+                        updateUI(null);
+                    }
+
+                    @Override
+                    public void onError(@NonNull ClearCredentialException e) {
+                        Log.e(TAG, "Couldn't clear user credentials: " + e.getLocalizedMessage());
+                    }
+                });
+    }
+    // [END sign_out]
+
     private void updateUI(FirebaseUser user) {
 
     }

auth/app/src/main/java/com/google/firebase/quickstart/auth/kotlin/GoogleSignInActivity.kt

@@ -3,10 +3,12 @@ package com.google.firebase.quickstart.auth.kotlin
 import android.os.Bundle
 import android.util.Log
 import androidx.appcompat.app.AppCompatActivity
+import androidx.credentials.ClearCredentialStateRequest
 import androidx.credentials.Credential
 import androidx.credentials.CredentialManager
 import androidx.credentials.CustomCredential
 import androidx.credentials.GetCredentialRequest
+import androidx.credentials.exceptions.ClearCredentialException
 import androidx.credentials.exceptions.GetCredentialException
 import androidx.lifecycle.lifecycleScope
 import com.google.android.libraries.identity.googleid.GetGoogleIdOption
@@ -75,8 +77,8 @@ class GoogleSignInActivity : AppCompatActivity() {
             try {
                 // Launch Credential Manager UI
                 val result = credentialManager.getCredential(
-                    request = request,
-                    context = baseContext
+                    context = baseContext,
+                    request = request
                 )
 
                 // Extract credential from the result returned by Credential Manager
@@ -98,7 +100,7 @@ class GoogleSignInActivity : AppCompatActivity() {
             // Sign in to Firebase with using the token
             firebaseAuthWithGoogle(googleIdTokenCredential.idToken)
         } else {
-            Log.d(TAG, "Credential is not of type Google ID!")
+            Log.w(TAG, "Credential is not of type Google ID!")
         }
     }
     // [END create_google_id_token]
@@ -122,6 +124,24 @@ class GoogleSignInActivity : AppCompatActivity() {
     }
     // [END auth_with_google]
 
+    // [START sign_out]
+    private fun signOut() {
+        // Firebase sign out
+        auth.signOut()
+
+        // When a user signs out, clear the current user credential state from all credential providers.
+        lifecycleScope.launch {
+            try {
+                val clearRequest = ClearCredentialStateRequest()
+                credentialManager.clearCredentialState(clearRequest)
+                updateUI(null)
+            } catch (e: ClearCredentialException) {
+                Log.e(TAG, "Couldn't clear user credentials: ${e.localizedMessage}")
+            }
+        }
+    }
+    // [END sign_out]
+
     private fun updateUI(user: FirebaseUser?) {
     }