android - Contextual Action Mode AppCompatActivity not show -

i have activity extending appcompatactivity, , wish set contextual action bar on it. here oncreate method

toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar); setsupportactionbar(toolbar); mainactivity.this.startsupportactionmode(new actionbarcallback()); 

my actionbarcallback extend android.support.v7.view.actionmode , declared that

    @override     public boolean oncreateactionmode(actionmode mode, menu menu) {         mode.getmenuinflater().inflate(r.menu.contextual_menu, menu);         return false; //here error     } 

the theme set on manifest

<style name="apptheme.noactionbar">     <item name="windowactionbar">false</item>     <item name="windownotitle">true</item>     <item name="windowactionmodeoverlay">true</item> </style> 

manifest

<application     android:name=".application"     android:allowbackup="true"     android:icon="@mipmap/ic_launcher"     android:label="@string/app_name"     android:supportsrtl="true"     android:theme="@style/apptheme" >  </application> 

activity

<activity         android:name=".mainactivity"         android:label="@string/title_activity_main2"         android:theme="@style/apptheme.noactionbar" > </activity> 

well! oncreateactionmode trigger fine cab never show.

any ideas?

so here error

@override public boolean oncreateactionmode(actionmode mode, menu menu) {     mode.getmenuinflater().inflate(r.menu.contextual_menu, menu);     return true; // work fine } 

set windowactionmodeoverlay theme.noactionbar

<item name="windowactionmodeoverlay">true</item> 

don't have set startactionmode() toolbar saw on over stackoverflow thread. on android.support.v7.view.actionmode line work fine me.

main2activity.this.startsupportactionmode(new actionbarcallback()); //android.support.v7.view.actionmode