How to remove activity from backstack in android?

Question

I have an app in which i have three activity namely:- Login,MainActivity and password activity.when I go to password activity and do some event then after login activity comes and here when i press back it will remove login and Mainactivity comes which I don't want. what i want when i press device back twice it will simple close app not to come Mainactivity.How can I archeive this problem.

code that i have tried but not success.

Login code:-

@Override
protected void onResume() {
    super.onResume();
    clearAllTask();
}

private void clearAllTask() {
    CMainActivity m_MainActivity = new CMainActivity();
    if (m_MainActivity.m_MainActivity != null) {
        m_MainActivity.m_MainActivity.finish();
    }

}

and code for MainActivity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    m_MainActivity = this;
}

Login>Main>Password and after that Password>Login.....now here when I press login back MainActivity comes which i don't want — Vishal, Nov 07 '16 at 04:42
I think this link can help you. [Clicking the back button twice to exit an activity>>>](http://stackoverflow.com/questions/8430805/clicking-the-back-button-twice-to-exit-an-activity) — Hein Htet Aung, Nov 07 '16 at 04:44
you don't need to clear the stack, you just need to handle the "backpress" — Hein Htet Aung, Nov 07 '16 at 04:45

score 2 · Answer 1 · answered Nov 07 '16 at 04:45

You need to clear the back-stack where you are using the Intent
Like this:

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

Here FirstActivity will get cleared from back-stack and will be finished. Also you will be navigated to SecondActivity. So when you press back button from SecondActivity, it will close the app.
Hope this will solve your problem.

How to remove activity from backstack in android?

1 Answers1