I'm implementing an authentication flow in my Flutter app.
After a sign in attempt, the CheckAuth (which checks whether a user is signed in or not and then opens home screen or sign up screen accordingly) is opened with this code:
void _signIn() async {
await _auth
.signInWithEmailAndPassword(
email: _userEmail.trim(), password: _userPassword.trim())
.then((task) {
// go to home screen
if (task.getIdToken() != null) {
setState(() {
Navigator.pushReplacement(
context,
new MaterialPageRoute(
builder: (BuildContext context) => new CheckAuth()));
});
} else {
print("Authentication failed");
}
});
}
Problem: I can successfully sign in to the app, but if I tap back button after I sign in, it goes back to the sign in screen (while I expect it to exit from the app).
Question: How to move from one screen to another in Flutter without the way back?
Do I need to somehow delete the navigator history? Or don't use navigator at all? I tried Navigator.replace method, but it didn't seem to work.
You need to use Navigator.pushReplacement
when leaving the auth screen too. Not just when redirecting to login page.