FragmentStatePagerAdapter is deprecated from API 27

Question

FragmentStatePagerAdapter is deprecated from API 27. What's the alternative of FragmentStatePagerAdapter?

private class MainPagerAdapter extends FragmentStatePagerAdapter {      MainPagerAdapter(FragmentManager fm) {         super(fm);     }      @Override     public Fragment getItem(int position) {         Fragment result = new DummyFragment();         return result;     }      @Override     public int getCount() {         return 5;     }  } 

Above code shows FragmentStatePagerAdapter, getItem(...) and super(...) as deprecated.

Answer 1

Switch to ViewPager2 and use FragmentStateAdapter instead.

From there you can use onPause and onResume callbacks to determine which fragment is currently visible for the user. onResume is called when a fragment became visible and onPause when it stops to be visible. -> read more

Based on the comments of Eric and Reejesh.

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Old answer (deprecated too now)

The following constructors do the same

super(@NonNull FragmentManager fm) super(@NonNull FragmentManager fm, BEHAVIOR_SET_USER_VISIBLE_HINT) 

Passing BEHAVIOR_SET_USER_VISIBLE_HINT got deprecated. You should pass BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT instead.

The difference in passing those is explained in FragmentPagerAdapter:

 /**  * Indicates that Fragment#setUserVisibleHint(boolean) will be   * called when the current fragment changes.  */ @Deprecated public static final int BEHAVIOR_SET_USER_VISIBLE_HINT = 0;  /**  * Indicates that only the current fragment will be   * in the Lifecycle.State#RESUMED state. All other Fragments   * are capped at Lifecycle.State#STARTED.  */ public static final int BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT = 1;