System.exit(0) doesnt close all my activities?

Question

I have 2 activity, so activity 1 go to activity 2 then on activity 2 I have an exit button. But when I click it, all it only exited the activity number 2 and return to activity 1 again. Its basically felt like I just started the application again. I am not sure why?

This is my code.

Button btExit = (Button) findViewById(R.id.btExit);
    btExit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
            System.exit(0);
        }
    });

call finish() after startActivity(Activity2) in your Activity1. — Anukool, May 10 '13 at 11:08
http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon. Recommend not to use System.exit(0); — Raghunandan, May 10 '13 at 11:09
@Anukool that will not work if user presses back key instead of button. — MaciejGórski, May 10 '13 at 11:13
The best way to accomplish this is http://stackoverflow.com/questions/3226495/android-exit-application-code/9735524#9735524 (mentioned in one of the answers). Or you can use MaciejGórski's suggestion to call ActivityB from ActivityA using `startActivityForResult()`. — David Wasser, May 10 '13 at 14:51

score 7 · Answer 1 · answered May 10 '13 at 11:10

7

Don't use System.exit.

If you want user to close app from any Activity I suggest using startActivityForResult, checking returned value in onActivityResult in first Activity and calling finish() there too.

answered May 10 '13 at 11:10

MaciejGórski

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Why? finish does not closes the application, only activity is closed. People, try to understand that we have many other classes that are not derived from Activity. They may be used to automate DB conection, store login id, user name, last query results... So closing activity does NOT SOLVE the problem in production environment. Aaa, cześć Maciek ;) – TomeeNS Oct 02 '15 at 02:44

score 4 · Answer 2 · edited May 23 '17 at 10:29

4

You can either simulate hitting the home button:

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

but this will not close the app..

to close it, you can do as https://stackoverflow.com/a/9735524/1434631

edited May 23 '17 at 10:29

Community

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1

answered May 10 '13 at 11:11

Nermeen

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Bringing up the HOME application won't change the current state of this task. That means, using this example, that when the user starts this application again from the HOME screen, it will bring the existing task (containing Activity1 and Activity2) back to the front and show the user Activity2 (which is probably not what OP wants to happen. The linked solution is better. – David Wasser May 10 '13 at 12:20

score 2 · Answer 3 · answered Feb 25 '19 at 06:56

2

Use
finishAffinity(); to exit from the application .

finish() will only clears the activity from the activity stack.

answered Feb 25 '19 at 06:56

krishnamurthy

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score 1 · Answer 4 · edited Jun 20 '20 at 09:12

1

System.exit(0) does not work for closing application

  ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
    am.killBackgroundProcesses("com.root.abc");
    
    System.runFinalizersOnExit(true);
    System.exit(0);


add Manifest permission
<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />

edited Jun 20 '20 at 09:12

Community

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answered Dec 29 '16 at 12:55

Ashutosh Srivastava

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score 0 · Answer 5 · answered May 10 '13 at 11:12

0

use finish() and a sharedPreference flag and set the flag when you click button. on your other activity, check the flag and finish() it if the flag is set

answered May 10 '13 at 11:12

Jithu

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score 0 · Answer 6 · answered May 10 '13 at 11:42

0

Finish the first activity by calling finish(); on the buttonclick after passing the intent to start the next activity.

answered May 10 '13 at 11:42

ASP

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System.exit(0) doesnt close all my activities?

6 Answers6

System.exit(0) does not work for closing application

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