java - Android Studio - Why does the ActionBar always show, even when fully disabled? -

i started android application development , have come across issue actionbar. aware question has been asked few times, , have made changes necessary can see other articles.

currently, main activity looks this: image

as can see, there blue bar @ top of screen directly under notification bar actionbar supposed be. of app themes (i believe) set noactionbar. rid of blue bar can use entire screen put contents.

my code follows:

main_activity.java

package ryanpx2016.golftracker;  import android.os.bundle; import android.support.design.widget.floatingactionbutton; import android.support.design.widget.snackbar; import android.support.v7.app.appcompatactivity; import android.support.v7.widget.toolbar; import android.view.view; import android.view.menu; import android.view.menuitem; import android.widget.button; import android.content.intent;  public class mainactivity extends appcompatactivity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          button regularscorepageactivitybutton = (button)findviewbyid(r.id.scoresheetbutton);         regularscorepageactivitybutton.setonclicklistener(new view.onclicklistener()         {             @override             public void onclick(view view)             {                 startactivity(new intent(mainactivity.this, regularscorepageactivity.class));            }         });      }      @override     public boolean oncreateoptionsmenu(menu menu)     {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.menu_main, 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;         }          return super.onoptionsitemselected(item);     } } 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.coordinatorlayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"     android:layout_height="match_parent" android:fitssystemwindows="true"     tools:context=".mainactivity">      <android.support.design.widget.appbarlayout android:layout_height="wrap_content"         android:layout_width="match_parent" android:theme="@style/apptheme.appbaroverlay">          <android.support.v7.widget.toolbar android:id="@+id/toolbar"             android:layout_width="match_parent" android:layout_height="?attr/actionbarsize"             android:background="?attr/colorprimary" app:popuptheme="@style/apptheme.popupoverlay" />      </android.support.design.widget.appbarlayout>      <include layout="@layout/content_main" />  </android.support.design.widget.coordinatorlayout> 

content_main.xml

<?xml version="1.0" encoding="utf-8"?> <relativelayout     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:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     android:paddingbottom="@dimen/activity_vertical_margin"     app:layout_behavior="@string/appbar_scrolling_view_behavior"     tools:showin="@layout/activity_main"     tools:context=".mainactivity">      <button         style="?android:attr/buttonstylesmall"         android:background="@drawable/scoresheet_button"         android:layout_width="185dp"         android:layout_height="wrap_content"         android:text="@string/scoresheet_button"         android:id="@+id/scoresheetbutton"         android:layout_centervertical="true"         android:layout_centerhorizontal="true" />      <button         android:background="@drawable/course_buttons"         android:layout_width="185dp"         android:layout_height="wrap_content"         android:text="@string/my_golf_courses_button"         android:id="@+id/mygolfcoursesbutton"         android:layout_below="@+id/scoresheetbutton"         android:layout_alignstart="@+id/scoresheetbutton"         android:layout_margintop="35dp" />      <button         android:background="@drawable/course_buttons"         android:layout_width="185dp"         android:layout_height="wrap_content"         android:text="@string/my_minigolf_courses_button"         android:id="@+id/myminigolfcoursesbutton"         android:layout_margintop="35dp"         android:layout_below="@+id/mygolfcoursesbutton"         android:layout_centerhorizontal="true" />   </relativelayout> 

androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="ryanpx2016.golftracker" >      <application         android:allowbackup="true"         android:icon="@mipmap/ic_launcher"         android:label="@string/app_name"         android:supportsrtl="true"         android:theme="@style/apptheme" >         <activity             android:name=".mainactivity"             android:label="@string/app_name"             android:theme="@style/apptheme.noactionbar" >             <intent-filter>                 <action android:name="android.intent.action.main" />                 <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>            <activity             android:name=".regularscorepageactivity"             android:label="@string/title_activity_regular_score_page"             android:theme="@style/apptheme.noactionbar" >             <intent-filter>                 <action android:name="ryanpx2016.golftracker.regularscorepageactivity" />                 <category android:name="android.intent.category.default" />             </intent-filter>         </activity>     </application>  </manifest> 

styles.xml

<resources>      <!-- base application theme. -->     <style name="apptheme" parent="theme.appcompat.light.noactionbar">         <!-- customize theme here. -->         <item name="colorprimary">@color/colorprimary</item>         <item name="colorprimarydark">@color/colorprimarydark</item>         <item name="coloraccent">@color/coloraccent</item>     </style>        <style name="apptheme.noactionbar">         <item name="windowactionbar">false</item>         <item name="windownotitle">true</item>     </style>        <style name="apptheme.appbaroverlay" parent="themeoverlay.appcompat.dark.actionbar" />     <style name="apptheme.popupoverlay" parent="themeoverlay.appcompat.light" />  </resources> 

i believe may have toolbar, again, don't know i'm saying :d

any , appreciated. thanks!!

delete activity_main.xml :

    <android.support.v7.widget.toolbar android:id="@+id/toolbar"         android:layout_width="match_parent" android:layout_height="?attr/actionbarsize"         android:background="?attr/colorprimary" app:popuptheme="@style/apptheme.popupoverlay" />