Check if fragment is currently visible or no

Question

I know there are lots of similar questions in StackOverflow but my question is little different.

I have nested hierarchy of Fragments like in below structure:

                                  Activity                                      |                                      |                                  AFragment                                      |                                 (ViewPager)                                  |       |                                           |       |                                   BFragment       BFragment  .....                             |                                               (ViewPager)                                                |       |                                                  |       |                                           CFragment     CFragment  ...                      |                 (ViewPager)                                          |     |                                                 |     |                                    DFragment   DFragment ... 

Now i want to know that whether DFragment is showing to user or not?

I tried lots of solution from StackOverflow but couldn't get sucess.

What i tried is:

I tried setUserVisibleHint() but it returns truefor multiple DFragment in above hierarchy which is a cause of ViewPager

I also tried from these links: link1, link2, link3 and so on... but did not got actual solution.

Waiting for help. Thank you.

UPDATE

Adapter Class

class ViewPagerAdapter extends FragmentPagerAdapter {         private final List<Fragment> mFragmentList = new ArrayList<>();         private final List<String> mFragmentTitleList = new ArrayList<>();          public ViewPagerAdapter(FragmentManager manager) {             super(manager);         }          @Override         public Fragment getItem(int position) {             return mFragmentList.get(position);         }          @Override         public int getCount() {             return mFragmentList.size();         }          public void addFragment(Fragment fragment, String title) {             mFragmentList.add(fragment);             mFragmentTitleList.add(title);         }          @Override         public CharSequence getPageTitle(int position) {             return mFragmentTitleList.get(position);         }     } 

Answer 1

You can check, whether the View that fragment inflated is visible on the device's screen:

      Fragment fragment = ... // retrieve from `ViewPager`'s adapter.     View fragmentRootView = fragment.getView();     if (fragmentRootView != null && fragmentRootView.getGlobalVisibleRect(new Rect())) {         // fragment is visible     } else {         // fragment is not visible     }  

getGlobalVisibleRect() will return true if part of the view is visible at the root level.