How to stop back navigation to login page

Question

I have a login form and a button which when click starts another activity. But after pressing the back button on the bottom left of the phone, it navigates back to the login activity. How can I prevent this. This is what I've been working with :-

loginButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        startActivity(new Intent(LoginActivity.this, HomeActivity.class));    
    }
});

score 2 · Accepted Answer · answered Apr 12 '20 at 12:16

2

Just close the activity that you no longer need using finish()

loginButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
    startActivity(new Intent(LoginActivity.this, HomeActivity.class));
    finish();
   }
});

answered Apr 12 '20 at 12:16

Adam Ma

624
5
16

it does stop back navigation. When back button is pressed, the app minimizes and then when the ap is restored. It again opens a the login page. How to prevent that ? – Anit Aggarwal Apr 13 '20 at 00:11
1

That is the expected behaviour of back button on an Android device as it destroys the activity, you can look for how to override back button, but I would suggest, saving logged state of a user and check it once the app is launched, if he is logged, straight away start home activity and pass his details if needed – Adam Ma Apr 13 '20 at 08:50

score 1 · Answer 2 · edited Apr 12 '20 at 14:44

1

Try adding Intent.FLAG_ACTIVITY_CLEAR_TOP and Intent.FLAG_ACTIVITY_NEW_TASK. See the example bellow:

Intent intent = new Intent(this, A.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK); 
    startActivity(intent);

edited Apr 12 '20 at 14:44

Pedro Massango

4,114
2
28
48

answered Apr 12 '20 at 11:26

Alex Fetisov

71
4

score 1 · Answer 3 · answered Apr 12 '20 at 11:53

1

startActivity(new Intent(LoginActivity.this, HomeActivity.class)); finish ();//try this

answered Apr 12 '20 at 11:53

Shivam

113
7

How to stop back navigation to login page

3 Answers3