Android, Firebase Auth, user session still exists when user deletes and reinstall app

问题

In my first launching activity there is lines of code that checks if user is logged in by Firebase:

    if (mAuth.getCurrentUser() != null) {
                startActivity(new Intent(SplashActivity.this, MenuActivity.class));
                finish();
    }
    else 
    {

                startActivity(new Intent(SplashActivity.this, LoginActivity.class));
                finish();
    }

If user is logged in I open MenuActivity if not then LoginActivity

In my LoginActivity I authorize with signInWithCredential.

I have found one interesting problem.

When user deletes application then reinstalls it from Google Play and launches it user is still logged in and opens MenuActivity

I have found similar question but with iOS version.

Is it feature of Firebase? How it is possible to invalidate user session when user deletes application?

回答1:

Firebase support answered me and yes Firebase tries to keep some data even if appliaction is deleted.

In order to clear data when deleteing, I needed to disable backuping in my applications manifest in application:

android:allowBackup="false"
android:fullBackupContent="false"

来源：https://stackoverflow.com/questions/44042337/android-firebase-auth-user-session-still-exists-when-user-deletes-and-reinstal