android - ViewPager and Fragment not attached -

i trying implement tab view fragment fragment didn't appear. had linked viewpager.but still didn't work.

this mainactivity

package com.example.minkhantlu.timetableapp; import android.support.design.widget.tablayout; import android.support.v4.content.contextcompat; import android.support.v4.view.viewpager; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.view.layoutinflater; import android.widget.tablelayout;  import com.example.minkhantlu.timetableapp.fragment.viewpageradapter;  public class homeactivity extends appcompatactivity { private tablayout tablayout; private viewpager viewpager; private viewpageradapter viewadapter;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_home);      tablayout = (tablayout) findviewbyid(r.id.tab_layout);     viewpager = (viewpager) findviewbyid(r.id.my_view_pager);      viewadapter = new viewpageradapter(getsupportfragmentmanager());     viewpager.setadapter(viewadapter);      tablayout.tab mon = tablayout.newtab();     tablayout.tab tue = tablayout.newtab();     tablayout.tab wed = tablayout.newtab();     tablayout.tab thur = tablayout.newtab();     tablayout.tab fri = tablayout.newtab();      mon.settext("mon");     tue.settext("tue");     wed.settext("wed");     thur.settext("thur");     fri.settext("fri");      tablayout.addtab(mon, 0);     tablayout.addtab(tue, 1);     tablayout.addtab(wed, 2);     tablayout.addtab(thur,3);     tablayout.addtab(fri,4);      tablayout.settabtextcolors(contextcompat.getcolorstatelist(this,    r.color.coloraccent));      tablayout.setselectedtabindicatorcolor(contextcompat.getcolor(this, r.color.coloraccent));      viewpager.addonpagechangelistener(new tablayout.tablayoutonpagechangelistener(tablayout)); } 

}

tried viewpageradapter

package com.example.minkhantlu.timetableapp.fragment;  import android.support.v4.app.fragment; import android.support.v4.app.fragmentmanager; import android.support.v4.app.fragmentpageradapter; import android.util.log;  public class viewpageradapter extends fragmentpageradapter {   public viewpageradapter(fragmentmanager fm) {     super(fm); }  @override public fragment getitem(int position) {     return new mondayfragment(); }  @override public int getcount() {     return 0; } 

}

my fragment

package com.example.minkhantlu.timetableapp.fragment;  import android.content.context; import android.net.uri; import android.os.bundle; import android.support.v4.app.fragment; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup;  import com.example.minkhantlu.timetableapp.r;  public class mondayfragment extends fragment {  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     return inflater.inflate(r.layout.fragment_monday, container, false); } 

} fragment xml

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.minkhantlu.timetableapp.fragment.mondayfragment">  <!-- todo: update blank fragment layout --> <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_centerhorizontal="true"     android:layout_centervertical="true"     android:text="@string/hello_blank_fragment" />  </relativelayout> 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <framelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.minkhantlu.timetableapp.homeactivity"> <android.support.design.widget.tablayout     android:id="@+id/tab_layout"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:background="@color/colorprimarydark"/>  <android.support.v4.view.viewpager     android:id="@+id/my_view_pager"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:layout_below="@+id/tab_layout"     /> </framelayout> 

but fragment didn't appear, plz me this.

in viewpageradapter, try changing

@override public int getcount() {     return 0; } 

to

@override public int getcount() {     return 1; }