android - getSupportActionBar() returns null with a custom toolbar -


i have toolbar. now, want navigation tabs in app. purpose, wrote following code:

super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         toolbar = (toolbar) findviewbyid(r.id.app_bar);         toolbar.setlogo(r.mipmap.ic_launcher); //        toolbar.settitle(" daily qura'n verses");         setsupportactionbar(toolbar);          actionbar actionbar = getsupportactionbar();         actionbar.setnavigationmode(actionbar.navigation_mode_tabs);         actionbar.setdisplayshowtitleenabled(false);          actionbar.tab tab = actionbar.newtab()                 .settext("artistic fragment")                 .settablistener(new tablistener<artistfragment>(                         this, "artist", artistfragment.class));         actionbar.addtab(tab);          tab = actionbar.newtab()                 .settext("album fragment")                 .settablistener(new tablistener<albumfragment>(                         this, "album", albumfragment.class));         actionbar.addtab(tab);

i have set no action bar in styles.xml:

 <style name="apptheme" parent="theme.appcompat.light.noactionbar">         <!-- customize theme here. -->         <item name="coloraccent">@color/accentcolor</item>         <item name="colorprimary">@color/primarycolor</item>         <item name="colorprimarydark">@color/primarycolordark</item>     </style>

i have 2 fragments:

  1. albumfragment
  2. artistfragment

i have java class, tablistener:

package com.example.shiza.dailyquranverses; import android.app.activity; import android.support.v4.app.fragment; import android.support.v4.app.fragmenttransaction; import android.support.v7.app.actionbar;  public class tablistener<t extends fragment> implements actionbar.tablistener {     private fragment mfragment;     private final activity mactivity;     private final string mtag;     private final class<t> mclass;      /** constructor used each time new tab created.      * @param activity  host activity, used instantiate fragment      * @param tag  identifier tag fragment      * @param clz  fragment's class, used instantiate fragment      */     public tablistener(activity activity, string tag, class<t> clz) {         mactivity = activity;         mtag = tag;         mclass = clz;     }      /* following each of actionbar.tablistener callbacks */      public void ontabselected(actionbar.tab tab, fragmenttransaction ft) {         // check if fragment initialized         if (mfragment == null) {             // if not, instantiate , add activity             mfragment = fragment.instantiate(mactivity, mclass.getname());             ft.add(android.r.id.content, mfragment, mtag);         } else {             // if exists, attach in order show             ft.attach(mfragment);         }     }      public void ontabunselected(actionbar.tab tab, fragmenttransaction ft) {         if (mfragment != null) {             // detach fragment, because 1 being attached             ft.detach(mfragment);         }     }      public void ontabreselected(actionbar.tab tab, fragmenttransaction ft) {         // user selected selected tab. nothing.     } }

i think culprit following line:

actionbar.setnavigationmode(actionbar.navigation_mode_tabs);

because gives me warning.

on running app, gives me error. please me solve this.


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