I have an app where I’m signing in using Google account using Firebase authentication. Here is the code of signing in.
List<AuthUI.IdpConfig> providers;
providers= Arrays.asList(
new AuthUI.IdpConfig.EmailBuilder().build(),
new AuthUI.IdpConfig.GoogleBuilder().build()
);
private void showSignInOptions() {
startActivityForResult(
AuthUI.getInstance()
.createSignInIntentBuilder()
.setAvailableProviders(providers)
.build(),MY_REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==MY_REQUEST_CODE)
{
IdpResponse response=IdpResponse.fromResultIntent(data);
if(resultCode==RESULT_OK)
{
final FirebaseUser firebaseUser= FirebaseAuth.getInstance().getCurrentUser();
assert firebaseUser != null;
user_information.orderByKey()
.equalTo(firebaseUser.getUid())
.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.getValue()==null)
{
if(!dataSnapshot.child(firebaseUser.getUid()).exists()){
Common.loggedUser=new User(firebaseUser.getUid(),firebaseUser.getEmail());
user_information.child(Common.loggedUser.getUid())
.setValue(Common.loggedUser);
}
}
else {
Common.loggedUser=dataSnapshot.child(firebaseUser.getUid()).getValue(User.class);
}
Paper.book().write(Common.USER_UID_SAVE_KEY,Common.loggedUser.getUid());
updateToken(firebaseUser);
setUpUI();
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
}
});
}
}
}
The code works fine and after logging in it sends me to NavigationDrawerActivity. In the Navigation I have an option Sign Out. Now what I want to do is, when I click on Sign out, it should sign me out of my Google Account and next time when I come to login activity, it should again show me the option sign in with google and when I click, it should ask to select Google account as it did when the app was first installed.
I tried the following code which I got from answers of stackoverflow but it doesn’t work. It redirects me to login activity but doesn’t show any options and I’m logged in directly.
Here is the code, I tried.
GoogleSignInClient googleSignInClient;
GoogleSignInOptions gso=new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
googleSignInClient=GoogleSignIn.getClient(getBaseContext(),gso);
googleSignInClient.signOut().addOnCompleteListener(NavigateActivity.this,
new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
FirebaseAuth.getInstance().signOut();
Intent setupintent=new Intent(getBaseContext(),login.class);
setupintent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(setupintent);
finish();
}
});
Please guide me how to show the google builder again when I log out from google account.
Answer
When you use AuthUI you don’t need to sign out with GoogleSignInClient. You can do it from directly AuthUI like:
AuthUI.getInstance()
.signOut(context)
.addOnSuccessListener { // start login activity }