How to close all activities and exit from an app

Question

My app is intended to allow only logged in user to access the activities. If a user logs out, the Shared preference boolean isLogged in is set to false and the user should not access the rest of activities except the LoginActivity.

However, I am able to access all the previously opened activities by pressing the back button.

I would use finish(); while opening each activity but then I would like users to still use the back button while they're logged in.

I have tried solutions from other similar questions like

Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("EXIT", true);
startActivity(intent);

and on the onCreate() of my LoginActivity I have added

if (getIntent().getBooleanExtra("EXIT", false)) {
         finish();
    }

When I press the logout option, the previous activity opens instead.

Any suggestions please help me?

Answer 1

You should use this flags, that clear your TASK and create a new one

Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);