How to make a user sign out in Firebase?

Question

I am making a simple authentication app in Android using Firebase authentication. Till now I am successful in signing the user in, however the issue is that the user remains

Answer 1

Use this code FirebaseAuth.getInstance().signOut();

Answer 2

use this`

findViewById(R.id.signout).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            FirebaseAuth.getInstance().signOut();
            Intent intent = new Intent(currentActivity.this, MainActivity.class);             

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);//makesure user cant go back
                startActivity(intent);
            }
        });`

Answer 3

This one just signs you out from the current application .

if you are using a fragment do this

AuthUI.getInstance().signOut(getActivity());

if you are using an activity do this

AuthUI.getInstance().signOut(getApplicationContext);

cheers!

Answer 4

if you are using firebaseAuthUI then recommended method is

public void onClick(View v) {
if (v.getId() == R.id.sign_out) {
    AuthUI.getInstance()
        .signOut(this)
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            public void onComplete(@NonNull Task<Void> task) {
                // user is now signed out
                startActivity(new Intent(MyActivity.this, SignInActivity.class));
                finish();
            }
        });
    }
}

according to firebaseAuthUI github Guide.

Answer 5

Try this one it is working for me.

FirebaseAuth.getInstance()
        .signOut(this)
        .addOnCompleteListener(new OnCompleteListener<Void>() {
            public void onComplete(@NonNull Task<Void> task) {
                // user is now signed out
                startActivity(new Intent(YOUR CURRENT ACTIVITY, ACTIVITY IN WHICH YOU WANT TO MOVE));
                finish();
            }
        });

Answer 6

FirebaseAuth.getInstance().signOut();

Then, to detect the sign-in status:

private FirebaseAuth mAuth = FirebaseAuth.getInstance()
public static boolean mAuthSignIn() {
    if (mAuth != null) {
        FirebaseUser user = mAuth.getCurrentUser();
        return user != null;
    }
    return false;
}