Odtnhj

When I call mFirebaseAuth.signOut() or mFirebaseUser.delete() my FirebaseAuth.AuthStateListener() works correct and returns null as FirebaseUser instance in onAuthStateChanged, I refresh UI and show "Sign in with Google" button.

But when I want to log in again, I don't see the pop-up with users (I have 2 users on my device, attached the image). The app shows this pop-up only in first sign in, after that it uses the same user. If I clear app's data on the settings screen I will be able to see this pop-up again.

My question is how to show this pop-up after every sign out.

I run this code when press Sign In button:

GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
 .requestIdToken(getString(R.string.default_web_client_id))
 .requestEmail()
 .build();
mGoogleApiClient = new GoogleApiClient.Builder(this)
 .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
 .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
 .build();

Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
 startActivityForResult(signInIntent, FirebaseActivity.REQUEST_SIGN_IN);

In onActivityResult(), I get an instance of GoogleSignInResult so everything I need happens after I call startActivityForResult().

In the Firebase Auth Quickstart sample code, the sign-out for Google provider includes these steps. Are you calling GoogleSignInClient.signOut() when you sign-out?

private void signOut() 
 // Firebase sign out
 mAuth.signOut();

 // Google sign out
 mGoogleSignInClient.signOut().addOnCompleteListener(this,
 new OnCompleteListener<Void>() 
 @Override
 public void onComplete(@NonNull Task<Void> task) 
 updateUI(null);
 
 );

Another option is to use the FirebaseUI library. It simplifies sign in and sign out operations in a sense that it will do all the heavy lifting for you.

Kotlin

AuthUI.getInstance().signOut(this).addOnCompleteListener 
 // do something here 

Java

AuthUI.getInstance()
 .signOut(ActivityMainOld.this)
 .addOnCompleteListener(new OnCompleteListener<Void>()

 @Override
 public void onComplete(@NonNull Task<Void> task) 

 // do something here

 
 );

Hope this helps

For anyone else who wants this result (as in getting the google account options back) on a different activity.

public static void signOut() 
 // Firebase sign out
 mAuth.signOut();

 // Google sign out
 Auth.GoogleSignInApi.signOut(mGoogleApiClient);

Add this on the sign in page, and before you pass to the next activity, just call SignOut().

// everything ok... 
signOut();
startActivity(new Intent(SignIn.this,NextOne.class));

and then, in your other class you can call

FirebaseAuth.getInstance().signOut();
startActivity(new Intent(NextClass.this, SignIn.class));

It's easy, and it will work. Cheers!

You can also define something like this:

private void signOut() 
 mAuth.signOut();
 mGoogleSignInClient.signOut().addOnCompleteListener(this,
 new OnCompleteListener<Void>() 
 @Override
 public void onComplete(@NonNull Task<Void> task) 
 Intent intent = new Intent(YourActivity.this, NextActivity.class);
 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 startActivity(intent);
 
 );

private void sendToLogin() //funtion
 GoogleSignInClient mGoogleSignInClient ;
 GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
 .requestIdToken(getString(R.string.default_web_client_id))
 .requestEmail()
 .build();
 mGoogleSignInClient = GoogleSignIn.getClient(getBaseContext(), gso);
 mGoogleSignInClient.signOut().addOnCompleteListener(/*CURRENT CLASS */.this,
 new OnCompleteListener<Void>() //signout Google
 @Override
 public void onComplete(@NonNull Task<Void> task) 
 FirebaseAuth.getInstance().signOut(); //signout firebase
 Intent setupIntent = new Intent(getBaseContext(), /*To ur activity calss*/);
 Toast.makeText(getBaseContext(), "Logged Out", Toast.LENGTH_LONG).show(); //if u want to show some text
 setupIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 startActivity(setupIntent);
 finish();
 
 );

this code is written to work as copy past just read COMMENTS in code to customize it to ur needs, i prefer to send user to login

I did mGoogleSignInClient.signOut()
this is working as expected.