Android fragment FragmentTransaction hide/show title -

my problem following, have fragments , titles viewpageradapter. when use fragmenttransaction.hide fragment went empty (blank), title stays. how can hide title fragment, can swipe shown fragments.

heres code:

private void setupviewpager(customviewpager viewpager) {      madapter = new viewpageradapter(getsupportfragmentmanager());      fraglog = new frglog();        fraginfo = new frginfo();      fragtext = new frgtext();      fragfirm = new frgfirm();      fraghist = new frghist();       madapter.addfragment( fraglog, getstring(r.string.frag_title_log));     madapter.addfragment( fraginfo, getstring(r.string.frag_title_info));     madapter.addfragment( fragtext, getstring(r.string.frag_title_text));     madapter.addfragment( fragfirm, getstring(r.string.frag_title_firm));     madapter.addfragment( fraghist, getstring(r.string.frag_title_hist));      viewpager.setadapter(madapter);     viewpager.setcurrentitem(1);     viewpager.setpagingenabled(true); }   class viewpageradapter extends fragmentpageradapter {     private final list<fragment> myfragmentlist = new arraylist<>();     private final list<string> myfragmenttitlelist = new arraylist<>();      public viewpageradapter(fragmentmanager manager) {         super(manager);     }      @override     public fragment getitem(int position) {         return myfragmentlist.get(position);     }      @override     public int getcount() {         return myfragmentlist.size();     }      public void addfragment(fragment fragment, string title) {         boolean found = false;         (int = 0; < myfragmentlist.size(); i++) {             if (myfragmentlist.get(i).getclass().getname().equalsignorecase(fragment.getclass().getname())) {                 found = true;             }         }         if (!found) {             myfragmentlist.add(fragment);             myfragmenttitlelist.add(title);         }     }      @override     public charsequence getpagetitle(int position) {         return myfragmenttitlelist.get(position);     }  }   protected void displayfirst() {      fragmenttransaction ft = getsupportfragmentmanager().begintransaction();     ft.hide(fragtext);     ft.show(fragfirm);     ft.show(fraghist);     ft.commit();  }  protected void displaysecond() {      fragmenttransaction ft = getsupportfragmentmanager().begintransaction();     ft.hide(fragfirm);     ft.hide(fraghist);     ft.show(fragtext);     ft.commit();  }   <xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="eu.angermayr.test.mainactivity">  <eu.angermayr.test.customviewpager     android:id="@+id/viewpager"     android:layout_width="match_parent"     android:layout_height="match_parent" >      <android.support.v4.view.pagertabstrip         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_gravity="top"         android:paddingbottom="10dp"         android:paddingtop="0dp" />  </eu.angermayr.test.customviewpager>  </linearlayout> 

you can add title using onpagechangelistener:

viewpager.setonpagechangelistener(new onpagechangelistener() {     public void onpagescrollstatechanged(int state) {}     public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {}      public void onpageselected(int position) {         // use position set title accordingly.           settitle("you fragment specific title");     } });