Get current fragment in viewpager2 in android

Question

Before I migrate to viewPager2, I get current fragment at this way to use methods inside it:

Fragment myFragment = (Fragment) viewPager.getAdapter().instantiateItem(viewPager, viewPager.getCurrentItem());

But, now I get an error on instantiateItem:

Cannot resolve method 'instantiateItem(androidx.viewpager2.widget.ViewPager2, int)'

I don't use Tag to create Fragments in ViewPager Adapter:

    private class MyPagerAdapter extends FragmentStateAdapter {

    public MyPagerAdapter(@NonNull FragmentManager fragmentManager, @NonNull Lifecycle lifecycle) {
        super(fragmentManager, lifecycle);
    }

    @NonNull
    @Override
    public Fragment createFragment(int position) {
        return ScreenFragment.newInstance(position);
    }

    @Override
    public int getItemCount() {
        return 5;
    }
}

So, How I can get the current fragment in viewPager2?

score 1 · Accepted Answer · answered May 21 '20 at 17:14

1

You can use HashMap to do this:

private HashMap<Integer, Fragment> hashMap = new HashMap<>();
@Override
public Fragment createFragment(int position) {
     Fragment fragment = ScreenFragment.newInstance(position);
     hashMap.put(position, fragment);
     return fragment;
}

And then get current fragment at this way:

ScreenFragment screenFragment = (ScreenFragment) hashMap.get(viewPager.getCurrentItem());

answered May 21 '20 at 17:14

Sajjad javadi

393
1
6

Thank you so much! – Marlen Schreiner May 21 '20 at 17:23
This doesn't handle config changes. Might want to check [this](https://stackoverflow.com/a/62056804/4625681) answer instead. – Dhananjay Suresh Jan 20 '21 at 20:03

score 1 · Answer 2 · answered Jul 23 '22 at 15:00

1

Perfect and easy solution by @Zain.

just want to add a little more:

You have to call childFragmentManager through your activity fragment manager instance.

SupportFragmentManager.Fragments[0].ChildFragmentManager.Fragments[0];

answered Jul 23 '22 at 15:00

Avii

25
5

score 0 · Answer 3 · answered May 26 '22 at 13:38

0

Maybe an easier way with ViewPager2 is to do something like

childFragmentManager.fragments[viewPager.currentItem - 1]

This will give you access to the current fragment.

answered May 26 '22 at 13:38

Zain

2,336
1
16
25

Get current fragment in viewpager2 in android

3 Answers3