android - Toast not showing -


i want show toast on actionitem() function inside. doesn't showing toast.

if call 

context context = getapplicationcontext();

before actionitem() app crashes.

import android.content.context; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.view.menu; import android.view.menuitem; import android.widget.toast;   public class showwebviewactivity extends actionbaractivity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.show_web_view);      }       @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.menu_show_web_view, menu);         return true;     }      @override     public boolean onoptionsitemselected(menuitem item) {         // handle action bar item clicks here. action bar         // automatically handle clicks on home/up button, long         // specify parent activity in androidmanifest.xml.         // int id = item.getitemid();          //noinspection simplifiableifstatement         //        if (id == r.id.action_settings) {         //            return true;         //        }          switch (item.getitemid()) {             case r.id.action_settings:                 actionitem();                 return true;             default:                 return super.onoptionsitemselected(item);         }      } // context context = getapplicationcontext() makes app crash why??     public void actionitem(){ // toast function should call here. not working         context context = getapplicationcontext();         toast.maketext(context, "action setting selected", toast.length_long);     }   }

it should be, 

toast.maketext(context, "action setting selected", toast.length_long).show();

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