android - ViewPager showing preloaded fragment instead of current fragment -

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i using tablayout(android.support.design.widget.tablayout) viepager instantiating 4 fragments fragmentstatepageradapter.

when scroll through fragments loaded perfectly.but when select tab randomly pre-loaded fragment(i know view pager instantiate neighbor fragments along current fragment) shown instead of current fragment.

[in case when click 3rd tab fragment in 4th position being shown,same fragment shown in 4th position too].

how can correct situation. in advance.

adapter

public class orderstatusadapter extends fragmentstatepageradapter {   private final list<fragment> mfragments = new arraylist<>(); private final list<string> mfragmenttitles = new arraylist<>();  public orderstatusadapter(fragmentmanager fm) {     super(fm); }  public void addfragment(fragment fragment, string title) {     mfragments.add(fragment);     mfragmenttitles.add(title); }  @override public fragment getitem(int position) {     return mfragments.get(position); }  @override public int getcount() {     return mfragments.size(); }  @override public charsequence getpagetitle(int position) {     return mfragmenttitles.get(position); }  }

viewpager

    viewpager viewpager = (viewpager) findviewbyid(r.id.viewpager);     if (viewpager != null) {         setupviewpager(viewpager);         if (viewpager != null) {           viewpager.setadapter(adapter);           tablayout = (tablayout) findviewbyid(r.id.orderstatustabs);           tablayout.settabmode(tablayout.mode_scrollable);           tablayout.setupwithviewpager(viewpager);           tablayout.setontabselectedlistener(new tablayout.ontabselectedlistener() {                             @override                             public void ontabselected(tablayout.tab tab) {                                 viewpager.setcurrentitem(tab.getposition());                             }                              @override                             public void ontabunselected(tablayout.tab tab) {                              }                              @override                             public void ontabreselected(tablayout.tab tab) {                              }                         });           }     }      private void setupviewpager(viewpager viewpager) {     orderstatusadapter adapter = new orderstatusadapter(getsupportfragmentmanager());     adapter.addfragment(failedfragment.newinstance(list1, title), "category 1");     adapter.addfragment(failedfragment.newinstance(list2, title), "category 2");     adapter.addfragment(failedfragment.newinstance(list3, title),       "category 3");     adapter.addfragment(failedfragment.newinstance(list4, title),       "category 4");      }

it because of recycleview custom adapter instance not being destroyed , previous data being loaded.so shifted adapter inside fragment , trick.


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