How to programmatically show next view in ViewPager?

Question

I created a ViewPager and everything is working fine, however I want to have a previous next button outside of ViewPager which can be used to navigate inside ViewPager. How can I go to next Item on ViewPager without swiping manually?

Possible duplicate of [How to change ViewPager's page?](http://stackoverflow.com/questions/7424562/how-to-change-viewpagers-page) — mmd1080, May 11 '17 at 04:08

score 168 · Accepted Answer · edited Feb 17 '14 at 21:27

168

As blessenm answered viewpager.setCurrentItem(int index) is the way to go.

edited Feb 17 '14 at 21:27

yprez

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answered Nov 12 '11 at 09:26

Vaibhav Mishra

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7

Unfortunately I do get different behavior, when the user swipes manually and when I jump using setCurrentItem. The order of calls is reversed. When I swipe, it first calls OnPageChangeListener#onPageSelected and then it calls setUserVisibleHint in the fragments. If I use setCurrentItem, it first calls setUserVisibleHint in the fragments and then it calls OnPageChangeListener#onPageSelected, which really is a problem in my case :/ so I was hoping to find a way to keep the natural behavior but still programmtically move to another page. – AgentKnopf Dec 06 '14 at 09:54
@Vaibhav what if I want to show the next view of activity – Prabs Nov 17 '15 at 12:11
@AgentKnopf Did you manage to find a solution for this issue ? I also see this weird behavior but can't find a way to keep the flow of the regular swipe when I programmatically switch to the next/prev fragment. – Gilad Eshkoli Dec 27 '16 at 07:34
@Gil I am afraid not - i removed the programmatical changing of the current view and just allowed swiping. However we completely changed the implementation later so I didn't pursue this issue any further. – AgentKnopf Jan 02 '17 at 10:04

Androiderson · Answer 2 · 2016-02-23T09:23:58.303

118

A complete implementation just for completeness:

public void MoveNext(View view) {
    //it doesn't matter if you're already in the last item
    pager.setCurrentItem(pager.getCurrentItem() + 1);
}

public void MovePrevious(View view) {
    //it doesn't matter if you're already in the first item
    pager.setCurrentItem(pager.getCurrentItem() - 1);
}

edited Feb 23 '16 at 09:23

answered Aug 16 '13 at 17:40

Androiderson

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You might need it. For instance, if the change is triggered by a click, you could use `(nextBt.getId() == view.id)` to know what caused it – Tomas Wolf Oct 09 '14 at 16:32
2

@Sagar he might have set the click listener of button in xml, in that case you must have the view parameter, even if you don't need it. – Ashish Tanna Jun 23 '15 at 23:24
page swiping animation not coming? – Lavekush Agrawal Feb 10 '16 at 06:48

score 19 · Answer 3 · answered Oct 11 '18 at 09:10

19

Easiest way is:

nextButton.setOnClickListener { pager.arrowScroll(View.FOCUS_RIGHT) }
prevButton.setOnClickListener { pager.arrowScroll(View.FOCUS_LEFT) }

answered Oct 11 '18 at 09:10

Pitel

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score 0 · Answer 4 · answered Apr 21 '17 at 06:10

i fix it Better, ty Androiderson.

  private void MoveNextTopSlideShow(View view)
    {
        if (_viewPager_TopImageSlide.CurrentItem == _viewPager_TopImageSlide.ChildCount)
        {
            if (_viewPager_TopImageSlide.ChildCount > 0)
            {
                _viewPager_TopImageSlide.SetCurrentItem(0,true);
            }
        }
        else
        {
            //it doesn't matter if you're already in the last item
            _viewPager_TopImageSlide.SetCurrentItem(_viewPager_TopImageSlide.CurrentItem + 1, true);
        }
    }

    private void MovePreviousTopSlideShow(View view)
    {
        if (_viewPager_TopImageSlide.CurrentItem == 0)
        {
            if (_viewPager_TopImageSlide.ChildCount > 0)
            {
                _viewPager_TopImageSlide.SetCurrentItem(_viewPager_TopImageSlide.ChildCount-1, true);
            }
        }
        else
        {
            //it doesn't matter if you're already in the first item
            _viewPager_TopImageSlide.SetCurrentItem(_viewPager_TopImageSlide.CurrentItem - 1, true);
        }
    }

How to programmatically show next view in ViewPager?

4 Answers4

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