Android backpressed not working

Question

I'm trying to build a simple login & registration application in android. My problem is that I want to handle backpressed() but it is not working.

Example: I'm having 3 activities: signin, register and verify. What I need is if we back click on register or verify, the navigation should go to signin and if we back click on signin, the application should close.

I have tried these lines of code but they are not working. They will navigate to previously visited activity. This code is of signin activity

@Override
public void onBackPressed() {
    Intent i = new Intent();
    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

    finish();
}

This code is of register activity

@Override
public void onBackPressed() {
    Intent i = new Intent(getBaseContext(), LoginActivity.class);
    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(i);
}

are you using toolbar? or action bar back press? – rafsanahmad007 Apr 09 '17 at 06:53 — rafsanahmad007, Apr 09 '17 at 06:53
you should call super in onBackPressed method! – Ahmad Vatani Apr 09 '17 at 06:53 — Ahmad Vatani, Apr 09 '17 at 06:53
I'm using device back button @rafsanahmad007 – Isurendrasingh Apr 09 '17 at 06:58 — Isurendrasingh, Apr 09 '17 at 06:58

score 0 · Answer 1 · answered Apr 09 '17 at 07:01

0

If you're building for API>16

@Override
public void onBackPressed(){
  finishAffinity();
  super.onBackPressed();
}

answered Apr 09 '17 at 07:01

Sadham Hussain

74
6

tahsinRupam · Accepted Answer · 2017-04-09T08:01:16.543

0

What I need is that if we back click on register or verify, the navigation should go to signin and if we back click on signin, the application should close.

To go to SignInActivity onBackpressd() from Verify and RegisterActivity:

@Override
public void onBackPressed() {
    Intent i = new Intent(this, SignInActivity.class);
    finishAffinity();
    startActivity(i);
}

In SignInActivity:

@Override
    public void onBackPressed() {
        finish();            
    }

Hope this helps.

edited Apr 09 '17 at 08:01

answered Apr 09 '17 at 07:02

tahsinRupam

6,325
1
18
34

This is somehow working but not as i want. For eg. if i'm on register and i backpressed it is going to signin but if i again go to register then verify and backpressed it is going to register. – Isurendrasingh Apr 09 '17 at 07:08
Yes @tahsinRupam – Isurendrasingh Apr 09 '17 at 07:11
21 @tahsinRupam – Isurendrasingh Apr 09 '17 at 07:21
1

yup working ! Thanks. But still having one issue. the app is not closing normally like other apps, it looks like it is crashing – Isurendrasingh Apr 09 '17 at 07:28
Still crashing @tahsinRupam – Isurendrasingh Apr 09 '17 at 07:50
Thanks for the suggestion. :) – tahsinRupam Apr 09 '17 at 08:02

score 0 · Answer 3 · answered Apr 09 '17 at 07:07

0

This works for sure!!

   @Override
    public void onBackPressed() {
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_HOME);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        finishAffinity();
        System.exit(0);


    }

answered Apr 09 '17 at 07:07

Sadham Hussain

74
6

what about this? – Sadham Hussain Apr 09 '17 at 07:22

score 0 · Answer 4 · answered Apr 09 '17 at 07:34

0

Finish will always go to the previous activity on the stack. The intent flags need to be set when your activity is LAUNCHED, not when your activity is being killed.

answered Apr 09 '17 at 07:34

Gabe Sechan

90,003
9
87
127

Android backpressed not working

4 Answers4