Save RecyclerView State inside Fragment in ViewPager created inside another Fragment

Question

I have a ViewPager inside a Fragment

public class FragmentPager extends BaseFragment {

    @Bind(R.id.viewpager)
    ViewPager viewPager;
    @Bind(R.id.detail_tabs)
    TabLayout detailTabs;

    private Activity mActivity;
    private PagerAdapter mPagerAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
        mPagerAdapter = new PagerAdapter(getChildFragmentManager());
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_pager, container, false);

        ButterKnife.bind(this, v);

        viewPager.setAdapter(mPagerAdapter);
        final int pageMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources()
                .getDisplayMetrics());
        viewPager.setPageMargin(pageMargin);
        detailTabs.setupWithViewPager(viewPager);


        return v;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        mActivity = activity;
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        ButterKnife.unbind(this);
    }
}

I am already using FragmentStatePagerAdapter to manage my fragments in ViewPager. Each Fragment has a RecyclerView. On clicking each item of the RecyclerView I am replacing the FragmentPager with FragmentDetail. When I navigate back to the FragmentPager, the RecyclerView starts from the beginning instead of position scrolled.

are you using fragment transactions to replace the fragment `FragmentPager`? — Drilon Blakqori, Feb 15 '17 at 13:43

score 0 · Answer 1 · edited May 23 '17 at 12:16

0

I think you change your fragment with fragmentTransaction replace method. You need to do it with fragmentTransaction add method. See the below

Basic difference between add() and replace() method of Fragment

edited May 23 '17 at 12:16

Community

1
1

answered Feb 15 '17 at 14:02

Tiko

851
8
15

I don't want to add it but instead, replace it. And Even if I do my Shared Element Transition won't work. – mihirjoshi Feb 15 '17 at 14:10

Save RecyclerView State inside Fragment in ViewPager created inside another Fragment

1 Answers1