Setuservisiblehint Called Before Oncreateview in Fragment

setUserVisibleHint method is called before the onCreateView method and does not work on the first load

This is how it works

View view;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState)
    {
        //inflate view layout
        view =inflater.inflate(R.layout.your_fragment, container, false);

        // return view
        return view;
    }

and use this

@Override
        public void setUserVisibleHint(boolean isUserVisible)
        {
            super.setUserVisibleHint(isUserVisible);
           // when fragment visible to user and view is not null then enter here.
                if (isUserVisible && view != null)
                {
                   onResume();
                }

        }

and inside onResume put this code

@Override
         public void onResume() { 
         super.onResume();   
            if (!getUserVisibleHint()) {
            return;
          }
      //do your stuff here
   }

How to use setUserVisibleHint in Fragment on Android

Before you put this code you know about fragment life cycle

 override fun setUserVisibleHint(isVisibleToUser: Boolean) {
        super.setUserVisibleHint(isVisibleToUser)
        if (isVisibleToUser) {
           // post your code
        }
    }

    override fun onStart() {
        super.onStart()
        userVisibleHint = true
    }

How to determine when Fragment becomes visible in ViewPager

How to determine when Fragment becomes visible in ViewPager

You can do the following by overriding setUserVisibleHint in your Fragment:

public class MyFragment extends Fragment {
    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isVisibleToUser) {
        }
        else {
        }
    }
}

in androidx.fragment.app.Fragment，setUserVisibleHint（）is Deprecated，and not executed,why？

They just changed API in Fragments.

If you use this method to limit fragments lifecycle:

You can now set a max Lifecycle state for a Fragment by calling
setMaxLifecycle() on a FragmentTransaction. This replaces the now
deprecated setUserVisibleHint().

Source: https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0-alpha07 .

If you need this method because you try to detect which fragment is currently visible in ViewPager. You can now just use onResume and onPause methods instead but before that you should change default behaviour in FragmentPagerAdapter constructor.

Like this:

FragmentPagerAdapter(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT)

Edit:
Because FragmentPagerAdapter is deprecated as well it is better to use ViewPager2 now.
In case of ViewPager2 it is default behaviour and we can use onResume and onPause methods to know which fragment is currently visible.

ViewPager call setUserVisibleHint after first Fragment is loaded

You can't (and shouldn't) rely on setUserVisibleHint for this. Instead, you should be using a ViewPager.OnPageChangeListener to get callbacks for when a page becomes visible. E.g.

viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
    @Override
    public void onPageSelected(int position) {
        // do your work
    } 
});

Note: You can use ViewPager.SimpleOnPageChangeListener if you don't need to listen for all callbacks.

Update

setOnPageChangeListener method is now deprecated, use addOnPageChangeListener instead

viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
    @Override
    public void onPageSelected(int position) {
        // do your work
    } 
});

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