FragmentStatePagerAdapter : continue to show the current fragment after dataset is changed

Question

I have a viewPager.

Say underlying dataset is d0,d1,d2,d3,etc, and corresponding fragments are f0,f1,f2,f3...

Currently Fragment f1 is visible i.e. position 1 of ViewPager. d0, is removed and notifyDataSetChanged is called on the adapter.

Now, the current visible fragment will become f2 i.e. f2 will be in position 1, while f1 will be in position 0, of ViewPager

I want that f1 to remain visible after the change in the dataset, i.e., ViewPager should show Fragment corresponding to position 0.

How to achieve this?

Edit : Currently, I am using viewpager.setCurrentItem(int position) to achieve this, but it has jerky UI experience. The changing of the viewPager items is visible to the user.

Please be more specific, or even better, post some relevant code — samvel1024, Jul 05 '16 at 18:25
@AbrahamyanSamvel I have edited the question to be more specific. — q126y, Jul 05 '16 at 18:27

score 0 · Answer 1 · answered Jul 05 '16 at 18:31

0

Try to call viewpager.setCurrentItem(int position) with the position of the fragment you want.

answered Jul 05 '16 at 18:31

Farhad

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Yes, I am using that currently, but it is jerky experience. The changing of `Fragment` is visible. – q126y Jul 05 '16 at 18:33
That's because you are calling notifyDataSetChanged() and make the viewpager redraw the tabs and fragments – Farhad Jul 05 '16 at 18:35
Is there alternative to `notifyDataSetChanged()`? – q126y Jul 05 '16 at 18:37
Have you tried to extend FragmentStatePagerAdapter for ViewPager adapter ? – Farhad Jul 05 '16 at 18:40

FragmentStatePagerAdapter : continue to show the current fragment after dataset is changed

1 Answers1