How can I get a reference to a Fragment in a ViewPager?

Question

The only documented way I found is:

MyFragment fragment = (MyFragment) getSupportFragmentManager().findFragmentById(R.id.fragment);

But since the Fragment is instantiated in a ViewPager I don't have an id.

    List<Fragment> fragments = new Vector<Fragment>();
    fragments.add(Fragment.instantiate(this, Fragment1.class.getName()));
    fragments.add(Fragment.instantiate(this, Fragment2.class.getName()));
    fragments.add(Fragment.instantiate(this, Fragment3.class.getName()));

Thanks

Same problem here. Seems to be solved in http://stackoverflow.com/questions/7379165/update-data-in-listfragment-as-part-of-viewpager. — Randy Sugianto 'Yuku', Jun 11 '12 at 17:13

score 5 · Accepted Answer · edited May 23 '17 at 10:33

You appear to be holding all fragments in memory in an oh-so-obsolete Vector. In that case, you would retrieve your fragment out of that same Vector. For example, call getCurrentItem() on the ViewPager to find the currently-selected fragment index, then call get() on the Vector with that index.

Note, though, that if you are relying on FragmentPagerAdapter or FragmentStatePagerAdapter to hold your fragments, that a fragment for a given index may not exist, either because it has not been created yet or it has been discarded to minimize memory consumption.

(BTW, see Why is Java Vector class considered obsolete or deprecated? for more on Vector)

How can I get a reference to a Fragment in a ViewPager?

1 Answers1