java - IllegalStateException when launching application after moved between computers -

tl;dr

these exact files work on 1 workstation, , not one.

what (error)

fatal exception: main                                                      java.lang.runtimeexception: unable start activity    componentinfo{com.example.erik.recipefriend2/com.example.erik.recipefriend2.mainactivity}:    java.lang.illegalstateexception: need use    theme.appcompat theme (or descendant) activity. 

the error @ line 26, in case this:

setsupportactionbar(toolbar); 

what have done topic states, have been moving android studio project stationary computer onto laptop. have been using git bitbucket able work on both computers. when pulled project , tried run it, got error message displayed above. when zipped project stationary computer , unpacked , launched on laptop, got same error. lastly, pasted indivudial files (class files, drawables , xml-files) newly created project, still error.

i running out of ideas. have line line checked classes on stationary computer , compared them lines on laptop, no avail.

i include classes , xmls think involved in matter.

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="android:actionoverflowbuttonstyle">@style/overflow</item> </style>  <style name="themeoverlay.recipesapp" parent="theme.appcompat.noactionbar">     <item name="android:colorbackground">@color/colorgreen</item>     <item name="android:textcolor">#ffffff</item> </style>  <style name="overflow" parent="widget.appcompat.actionbutton.overflow">     <item name="android:src">@drawable/ic_menu_white_24dp</item>   </style>   </resources> 

androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.erik.recipefriend2">  <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> </application>  </manifest> 

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="com.example.erik.recipefriend2.mainactivity">  <android.support.design.widget.appbarlayout     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:theme="@style/apptheme">      <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/themeoverlay.recipesapp" />  </android.support.design.widget.appbarlayout>  <include layout="@layout/content_main" />  <android.support.design.widget.floatingactionbutton     android:id="@+id/addingredient"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_gravity="bottom|right"     android:layout_margin="16dp"     app:backgroundtint="#91ff93"     android:tint="#ffffff"     android:onclick="gotoadd"     android:scaletype="fitcenter"     android:src="@android:drawable/ic_input_add" />  <android.support.design.widget.floatingactionbutton     android:id="@+id/searchrecipe"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     app:backgroundtint="#91ff93"     android:src="@android:drawable/ic_search_category_default"     android:layout_margin="16dp"     android:tint="#ffffff"     android:scaletype="fitcenter"     android:onclick="gotosearch"     android:layout_gravity="bottom|left"     />   </android.support.design.widget.coordinatorlayout> 

mainactivity.java

package com.example.erik.recipefriend2;  import android.graphics.color; 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.util.log; import android.view.menuinflater; import android.view.view; import android.view.menu; import java.lang.reflect.method;  public class mainactivity extends appcompatactivity {       @override    protected void oncreate(bundle savedinstancestate) {        super.oncreate(savedinstancestate);        setcontentview(r.layout.activity_main);        toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);        toolbar.settitletextcolor(color.white);        setsupportactionbar(toolbar);        android.support.v7.app.actionbar actionbar = getsupportactionbar();        actionbar.setlogo(r.mipmap.ic_launcher);        actionbar.setdisplayuselogoenabled(true);        actionbar.setdisplayshowhomeenabled(true);        floatingactionbutton fab = (floatingactionbutton) findviewbyid(r.id.addingredient);     fab.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view view) {             snackbar.make(view, "replace own action", snackbar.length_long)                     .setaction("action", null).show();         }     });    }    @override    public boolean oncreateoptionsmenu(menu menu){        menuinflater menuinflater = getmenuinflater();        menuinflater.inflate(r.menu.activity_main_actions, menu);        return super.oncreateoptionsmenu(menu);    }    @override       protected boolean onprepareoptionspanel(view view, menu menu) {       if (menu != null) {         if (menu.getclass().getsimplename().equals("menubuilder")) {             try {                 method m = menu.getclass().getdeclaredmethod(                         "setoptionaliconsvisible", boolean.type);                 m.setaccessible(true);                 m.invoke(menu, true);             } catch (exception e) {                 log.e(getclass().getsimplename(), "onmenuopened...unable set icons overflow menu", e);             }         }     }     return super.onprepareoptionspanel(view, menu);    }    public void gotoadd(view view){     }    public void gotosearch(){     }   } 

what can problem be? also, if more files needed, happy display them well.

on you're activity define android:theme="@style/apptheme.noactionbar" while don't define apptheme.noactionbar anywhere in styles. it's confusing compiles, explain why there's error.