ViewPager fragment loads even if the parent Fragment is not active

Question

The background

I have single activity in my App which loads 2 fragments based on some menu item selection

public class ActivityMain extends AppCompatActivity{
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if(savedInstanceState == null) {
            loadFragment(1); // DEFAULT FRAGMENT, AT THE BEGINNING
        }
    }
    ..........................
    ..........................
    // This method is called above, ALSO onItemClick in the Navigation Drawer (code not included for brevity)
    public void loadFragment(int position) {
        Fragment fragment = null;
        switch (position) {
            case 1:
                fragment = new Fragment1();
                break;
            case 2:
                fragment = new Fragment2();
                break;
            default:
                break;
        }
        if (fragment != null) {
            getFragmentManager().beginTransaction().replace(R.id.fragment_container, fragment, "frag_" + position).addToBackStack(null).commit();
        }
    }
}

"Fragment1" is a simple fragment with a fixed text in a TextView. "Fragment2" uses SlidingTabLayout to load a Fragment "FragmentViewPager" in a viewpager using FragmentStatePagerAdapter.

The issue I am facing:

Even if I remove "Fragment2" from the Activity's Frame Layout (using getFragmentManager().beginTransaction().remove), Fragment "FragmentViewPager" does not get destroyed, rather it resumes every time Activity resumes.

Question

Why FragmentViewPager is not destroyed with "Fragment2"?

In two places .. 1) in onCreate method IF savedInstanceState == null ... and 2) In the onClick event on the Navigation Drawer items. — abdfahim, Jan 01 '17 at 02:27
In the ViewPagerAdapter class of Fragment2 (code is included above) — abdfahim, Jan 01 '17 at 02:32

score 0 · Answer 1 · answered Jan 01 '17 at 07:54

0

If you are using FragmentStatePagerAdapter then this will not destroy fragment and when you swipe and come back to that fragment it will show old data without refresh. Because of not destroyed by viewpager.

answered Jan 01 '17 at 07:54

Chirag Sheta

149
1
12

I am not talking about swiping, rather I am removing the "Fragment2" (that contains the viewpager) from activity's frame layout. – abdfahim Jan 01 '17 at 08:07
Ok. There is only one way to remove fragment if you have added fragment manually you can refer this link [link]http://stackoverflow.com/questions/10396321/remove-fragment-page-from-viewpager-in-android – Chirag Sheta Jan 01 '17 at 08:17

ViewPager fragment loads even if the parent Fragment is not active

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