FragmentPagerAdapter and Pager NullPointerException. pager.setOffscreenPageLimit(3)

Asked Apr 29 '15 at 05:22

Active Apr 29 '15 at 08:57

Viewed 151 times

I have a problem. I have 4 pages. and I used the method that pager.setOffscreenPageLimit(3);... It is very well page swiping. However, When I called finish() at FragmentActivity, Error happened that Fragment BackStack NullPointerException. How do I solve it? enter image description here

I have 4 fragments and one MainActivity that extends FragmentActivity. I use pager and FragmentStatePagerAdapter. I want to make two buttons to exit the app or go back to previous Activity.

** Problem : When I called finish() method in MainActivity, Error happened upper picture. I want to know a solution about this problem.

edited Apr 29 '15 at 08:57

asked Apr 29 '15 at 05:22

Jun Seok Kim

Log cat trace for null pointer exception please.. – keshav kowshik Apr 29 '15 at 05:24
Why would you ever need to call finish? Let the user back out of the application. Post your relative code. – Jared Burrows Apr 29 '15 at 05:24
MainActivity 543 line is super.onDestroy() at onDestroy(). – Jun Seok Kim Apr 29 '15 at 05:32
hmm.. finish() is for exiting App or going Back LoginActivity. Because LoginActivity finished previously, I should call finish() and startActivity() to go LoginActivity. – Jun Seok Kim Apr 29 '15 at 05:34

FragmentPagerAdapter and Pager NullPointerException. pager.setOffscreenPageLimit(3)

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